Chess Middlegames by Laszlo Polgar [PDF]
Contents 1) Epaulet mate — (1-54) 2) Back rank — (55-108) 3) Double attack — (109-162) 4) Deflection — (163-216) 5) Deco
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Contents 1) Epaulet mate — (1-54) 2) Back rank — (55-108) 3) Double attack — (109-162) 4) Deflection — (163-216) 5) Decoy — (217-270) 6) Clearance — (271-324) 7) Discovered attack — (325-378) 8) Opening up the diagonal — (379-432) 9) Long diagonal — (433-486) 10) Opening up a line — (487-540) 11) Open line — (541-594) 12) Closing a line — (595-648) 13) Pin — (649-702) 14) Rook on the 7th or the 2nd rank — (703-756) 15) Sacrifice on h7 — (757-810) 16) Sacrifice on h6 — (811-864) 17) Sacrifice on g7 — (865-918) 18) Sacrifice on g6 — (919-972) 19) Sacrifice on f7 — (973-1026) 20) Sacrifice on f6 — (1027-1080) 21) Attack against the kingside — (1081-1134) 22) Hunting the king — (1135-1188) 23) Annihilation of the defensive piece — (1189-1242) 24) King in the middle — (1243-1296) 25) March with the king — (1297-1350) 26) Opposite side castling — (1351-1404)
Laszlo Polgar
Chess Middlegames
27) Counter attack — (1405-1458) 28) Defence — (1459-1512) 29) Attack with pawns — (1513-1566) 30) Pawn breakthrough — (1567-1620) 31) Pawn hunt — (1621-1674) 32) Advantage in development — (1675-1728) 33) Positional pawn sacrifice — (1729-1782) 34) Positional exchange sacrifice — (1783-1836) 35) Positional piece sacrifice — (1837-1890) 36) Positional queen sacrifice — (1891-1944) 37) Penetration — (1945-1998) 38) Activation of pieces — (1999-2052) 39) Intermediate move — (2053-2106) 40) Weakness of the isolated pawn — (2107-2160) 41) Isolated pawn, attack — (2161-2214) 42) Isolated pawn, breakthrough by d5 — (2215-2268) 43) Hanging pawns — (2269-2322) 44) Backward pawn — (2323-2376) 45) Passed pawn — (2377-2430) 46) Phalanx — (2431-2484) 47) Rook manoeuvre — (2485-2538) 48) Knight manoeuvre — (2539-2592) 49) Bishop manoeuvre — (2593-2646) 50) Queen manoeuvre — (2647-2700) 51) Capturing the queen — (2701-2754) 52) Piece on a bad square — (2755-2808) 53) Knight on the edge of the board — (2809-2862) 54) Knight on d6, e6 or d3, e3 — (2863-2916) 55) Opposite coloured bishops — (2917-2970) 56) A Pair of bishops — (2971-3024) 57) Strong knight versus bad bishop — (3025-3078)
Laszlo Polgar
Chess Middlegames
58) Exchange of a piece — (3079-3132) 59) Avoiding exchanges — (3133-3186) 60) Liquidation — (3187-3240) 61) Advantage in the centre — (3241-3294) 62) Breakthrough in the centre — (3295-3348) 63) Blowing up the centre — (3349-3402) 64) Hedgehog — (3403-3456) 65) Hedgehog, blowing up with d5 — (3457-3510) 66) Minority attack — (3511-3564) 67) Stone wall — (3565-3618) 68) King’s Indian attack against the white king — (36193672) 69) Sicilian piece sacrifice on d5 — (3673-3726) 70) Sicilian exchange sacrifice on c3 — (3727-3780) 71) Other Sicilian piece sacrifices — (3781-3834) 72) Blockade — (3835-3888) 73) Weak square — (3889-3942) 74) Perpetual check — (3943-3996) 75) Profilax — (3997-4050) 76) Space advantage — (4051-4104) 77) Double rook sacrifice — (4105-4158)
Laszlo Polgar
Chess Middlegames
Epaulet mate
1 8 7 6 5 4 3 2 1
4
rmbZkZ0s opopaNZp 0Z0Z0m0Z Z0Z0Z0ZQ 0Z0ZPZ0Z Z0M0Z0Z0 POPO0Z0O S0A0JBZq a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZbj0s0Z opopaQZp 0Z0Z0MnZ Z0Z0o0M0 0ZBmPZ0Z Z0ZPZ0Z0 POPZ0lPO S0AKZ0ZR a
b
2 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
f
g
h
a
b
c
d
e
f
g
h
6
rZ0Z0j0s o0o0Zpop 0aNZbZ0Z Z0Z0O0Z0 QZ0Z0ZqO Z0O0Z0Z0 PZ0Z0OPZ SNZ0ZRJ0 a
e
rZbZkZ0s o0opa0Zp 0ZnZ0ZNZ Z0Z0Z0oQ 0ZpZ0Z0Z Z0Z0Z0Z0 PO0Z0OPO Z0Z0Z0J0
3 8
d
5
rZkZ0Z0s opo0aqZp 0ZnZNZ0Z Z0Z0Z0A0 0Z0o0ZQZ Z0Z0Z0Z0 POPZ0OPO S0Z0Z0J0 a
c
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0mkZ opl0Zpop 0Z0Z0Z0Z ZBO0o0MQ 0Z0Z0o0Z Z0Z0Z0Z0 PO0Z0OPO Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
7 8 7 6 5 4 3 2 1
10
kZ0Z0Z0Z opZrZ0Z0 0m0Z0a0Z ZNZ0Z0Z0 0Z0Z0LpZ Z0Z0ZpOq 0Z0Z0O0Z Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0Zrj opo0m0op 0ZnZbZqZ Z0ZpZpZ0 0Z0Z0Z0S Z0LBZNZ0 PA0Z0OPO Z0Z0S0J0 a
8 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
12
0Z0Z0Zrj ZbZ0Z0sp 0ZqZ0m0Z o0m0Z0Z0 0Z0ZpZ0L ZPM0ZNZ0 PAPZRZ0Z J0Z0S0Z0 a
c
0Z0s0Zrj opZ0Z0op 0ZnopZqZ Z0o0Z0MN 0Z0Z0O0Z O0Z0Z0Z0 0APZ0Z0O ZKZRZ0ZQ
9 8
b
11
rm0j0a0Z opobZ0o0 0Z0Z0Z0Z Z0ZQZPZ0 0Z0Z0ZnZ Z0Z0ZNl0 POPOBZ0Z SNAKZ0Z0 a
Epaulet mate
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0srZkZ opZ0Zpop 0Z0Z0l0Z Z0ZbZ0Z0 0O0L0m0Z O0Z0ZBZ0 0M0Z0OPO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
13 8 7 6 5 4 3 2 1
16
rm0l0s0j opobo0ap 0Z0Z0opA Z0Z0Z0M0 0ZQZ0Z0Z Z0O0Z0Z0 PO0ZPOPO S0Z0JBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0ZrZ0j o0ZnZQap bZ0Z0Z0Z l0ZNMpZ0 0oBZ0Z0Z Z0Z0Z0Z0 PZ0Z0OPO Z0ZRZRJ0 a
14 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
18
0Z0ZrZkZ Z0oRO0op 0ZpZ0Z0Z o0Z0ZpM0 0Z0Z0LnZ l0Z0Z0O0 PZ0ZPO0O Z0Z0Z0J0 a
c
rZ0l0skZ Z0o0a0op pZnZ0m0Z ZpZpZbM0 0Z0Z0Z0Z ZBO0A0Z0 PO0M0OPO S0ZQZRJ0
15 8
b
17
0Zrs0ZkZ o0Z0Z0ap 0onZRZ0Z Z0opZpM0 0Z0Z0O0Z ZPl0Z0O0 PZ0L0A0O Z0ZRZKZ0 a
Epaulet mate
c
d
e
f
g
h
8 7 6 5 4 3 2 1
kZ0Z0Z0s sbZ0ZRZp NL0Z0ZpZ Z0o0ZnZ0 0o0Z0Z0Z Z0Z0Z0Z0 POnZ0ZPO Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
19 8 7 6 5 4 3 2 1
22
0Z0m0s0j Zpo0ZpZp 0s0Z0o0M o0Z0ZNZQ 0Z0ZPZRZ ZPl0Z0OK PZ0Z0Z0O Z0Z0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZrZ0l0j opm0ZnZp 0Z0Z0O0Z Z0Z0ZNS0 PZpA0Z0Z Z0O0Z0Z0 0Z0Z0ZQO Z0Z0Z0J0 a
20 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
24
0Z0Z0skZ Z0Z0Zpop pZrZ0Z0Z ZpZpZ0l0 0OnAnZ0Z ONZ0OBZb 0Z0Z0OPO L0ZRZRZK a
c
0ZrZrZkZ Zbl0Zpo0 pZ0Z0a0Z mpZpMNo0 0Z0O0Z0Z Z0ZQZPZP POBZRZPZ S0Z0Z0J0
21 8
b
23
rZ0Z0skZ ZbZpZpop ponZ0ZnZ Z0Z0lNAQ 0ZBZPZ0Z Z0O0Z0Z0 PZPZ0ZPO S0Z0ZRJ0 a
Epaulet mate
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0a0Z0s opZ0l0j0 0Z0Z0ZpZ Z0ZpZpOp 0ZpOrO0J O0O0O0Z0 0O0ARZ0Z Z0Z0S0L0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
25 8 7 6 5 4 3 2 1
28
0Z0j0Z0s ZbZpZ0ap 0o0Z0ZpZ Z0Z0opZ0 0Z0ZnZ0l Z0Z0ZnZP POPO0OPZ S0AQZRMK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0skZ Z0Z0o0ap 0l0ZpmpZ Z0Z0Z0Z0 QOpZ0Z0Z Z0Z0Z0O0 0Z0AnOBO ZRS0Z0ZK a
26 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
30
kZrZrZ0Z o0Z0Z0o0 0a0L0Z0Z mNZ0A0Z0 0Z0ZpZ0Z ZBZ0ZpOq 0O0Z0O0O S0ZRZ0ZK a
c
0Z0Z0Z0s o0o0Z0j0 0o0o0o0Z Z0ZPo0o0 0ZqZPmPs Z0O0LPJn PZPZ0Z0O Z0M0ARZR
27 8
b
29
0Z0Z0ZkZ opZ0ZpZp 0ZpZ0ZpZ Z0ZpZ0Zn 0O0O0l0Z O0Z0ZNZP 0Z0ZnZBZ ZRS0Z0ZK a
Epaulet mate
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0snl0Zrj o0ZbZpZp 0ZnopOpL Z0o0Z0Z0 0Z0ZPZ0M Z0OPZ0O0 PZ0Z0ZBO Z0ZNSRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
31 8 7 6 5 4 3 2 1
34
0Z0Z0jrZ S0Z0Z0Zp 0Z0Z0a0Z Z0Z0m0Z0 0Z0M0ZPl Z0O0Z0ZP 0Z0L0Z0J Z0Z0ZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0s0j o0Z0Z0op 0o0Z0Z0Z Z0Z0Z0s0 0Z0ZQm0Z Z0Z0Z0Sq PO0Z0O0O Z0Z0ZRJN a
32 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
36
0Z0ZkZrZ opo0Z0Zp 0Z0Z0Z0Z Z0Z0o0Z0 0Z0ZPZ0Z Z0M0Z0Zn POPZ0ZrO Z0ZRZRZK a
c
rZ0m0Zrj Z0ZPA0ap 0Z0ZQZpZ ZqZ0Z0Z0 0ZpZNZ0Z Z0Z0Z0Z0 0O0Z0ZPO Z0ZRZRZK
33 8
b
35
rmbj0a0s oplpmQZp 0Z0ZpZpZ Z0o0M0A0 0Z0ZNZ0Z Z0Z0Z0Z0 POPZ0OPO S0Z0JBZR a
Epaulet mate
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0arj Z0Z0ZpMp 0Z0o0O0Z o0Z0o0Z0 0oqZbZ0Z Z0Z0ZNZQ POPZ0Z0O ZKZRS0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
37 8 7 6 5 4 3 2 1
40
rZbl0Z0j opo0mQo0 0Z0ZpM0o Z0Z0Z0M0 0ZBO0Z0Z Z0O0m0Z0 PO0Z0ZPO S0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0l0Zks o0o0ZpZp 0o0Z0o0A Z0a0m0Z0 PZpoNZbZ Z0Z0ZNZ0 0OPZ0OPO S0ZQS0J0 a
38 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
42
rZbZ0ZkZ opo0m0Zp 0ZnZ0lpA Z0Z0Z0M0 0Z0MPZ0Z Z0LPZ0O0 PZPZ0ZBO Z0Z0Z0J0 a
c
0Z0Z0AkZ ZpZqZ0o0 pZ0ZpZ0o Z0Z0Z0m0 0Z0Z0Z0L ZBZ0ZbZ0 PZPZ0Z0O Z0Z0ZRJ0
39 8
b
41
NZkZra0s ZpZ0Z0o0 nZNobo0o L0ZpZ0Z0 0Z0Z0Z0Z Z0Z0A0Zq POPZ0O0O ZKZRZ0S0 a
Epaulet mate
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ ZpZ0Zpo0 pZqZ0ZNZ O0o0Z0m0 0Z0Z0ZbZ Z0M0O0A0 0OQZ0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
43 8 7 6 5 4 3 2 1
46
rZblrj0Z opZ0apoB 0Zpm0Z0o Z0ZpM0ZQ 0Z0O0O0Z Z0M0Z0Z0 PO0Z0ZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0Z0s opo0mkZp 0ZnZNM0Z Z0Z0o0Z0 0l0a0ZQZ Z0Z0Z0Z0 PZ0Z0OPO S0A0S0J0 a
44 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
48
rmbZrZ0Z opo0Zkop 0Z0Z0Z0Z Z0ZPZpZ0 0L0Z0O0l Z0Z0ZNZ0 POPMBZ0O S0AKZ0Zn a
c
0ZqZ0ZkZ o0Z0Opap 0o0Z0mpZ Z0ZPZ0Z0 0ZPZ0m0Z Z0Z0ZbZ0 PA0Z0OPO L0Z0SNJ0
45 8
b
47
rZblkZ0s opZpmpZp 0ZpZ0ZpA ZBa0Z0Z0 0ZNZPZ0Z Z0Z0Z0Z0 PZPZ0OPO ZRZQZRJ0 a
Epaulet mate
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZQZ0ZRZ Z0Z0lpZp po0s0Zpj Z0Z0Z0Z0 0O0ZPm0O Z0Z0Z0M0 PZ0Z0OPZ Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
49 8 7 6 5 4 3 2 1
52
rZ0lrj0Z ZbZ0apoB pZ0Z0Z0Z ZpZPM0Z0 0m0Z0Z0Z Z0Z0Z0Z0 0A0ZQOPO Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0s0Z0ZkZ o0o0Zpo0 0a0s0Z0o Z0ZPZ0Z0 QO0Z0Z0Z Z0Z0ZNZ0 PZ0ZqOPO Z0Z0ZRJR a
50 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
54
rZ0l0skZ obZ0Apop 0Z0ZpZ0Z ZpZ0Z0Z0 0ZpmPZnZ Z0Z0Z0M0 POPM0ZPO S0L0SBJ0 a
c
0ZksNZ0Z opZ0Z0Z0 0ZnZ0ZQZ Z0o0Z0Z0 0ZbZNZ0Z Z0OpZ0Z0 qZ0Z0OPZ Z0Z0S0J0
51 8
b
53
0Z0s0m0j Z0ZPZ0Zp po0Z0l0Z Z0oQo0Z0 PZPZ0ZBZ Z0ZbZ0S0 0O0Z0Z0O Z0Z0Z0J0 a
Epaulet mate
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblrZkZ opZ0Z0op 0Z0a0m0Z Z0opm0M0 0Z0Z0M0Z Z0OBZ0Z0 PO0Z0OPO S0AQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
55 8 7 6 5 4 3 2 1
58
0Z0Z0ZkZ Z0Z0lpZ0 0A0Z0Zpo Z0S0a0Z0 PZ0MbZ0Z ZPZ0L0Z0 rZ0Z0OPO Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0ZrZkZ ZpSqZ0ap pZ0opZpZ Z0Z0Z0Z0 PZ0MPZQZ Z0Z0Z0Z0 0O0Z0ZPO Z0S0Z0ZK a
56 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
60
0Z0s0skZ o0Znmpo0 0Z0ZpZ0o l0o0O0Z0 PZPZ0Z0Z Z0Z0ZNZ0 0ZQZ0OPO ZRARZ0J0 a
c
0Z0s0ZkZ o0ZrZpo0 0Z0Z0a0Z Z0Z0Z0Zp 0O0o0l0Z Z0ARZ0Z0 PZ0ZQZPO Z0ZRZ0J0
57 8
b
59
0ZrZrZkZ ZpZqZpop 0Z0o0a0Z o0ZPZ0Z0 0Z0L0Z0Z Z0Z0ZNZ0 PO0ZROPO Z0Z0S0J0 a
Back rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZkZ Z0Z0Z0lp po0Z0ZpZ Z0oPZ0Z0 0Z0ZPo0Z ZPZ0Z0Z0 PZRZ0ZPO Z0Z0L0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
61 8 7 6 5 4 3 2 1
64
0Z0s0akZ opl0Z0op 0ZpZ0Z0Z Z0O0ZQZB 0Z0Z0Z0Z ZPZ0Z0O0 PZ0Z0Z0O Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0s0Z0s0j Z0o0Z0op 0Z0Z0l0Z Z0L0Z0Z0 0m0S0m0Z Z0Z0ZNZ0 0Z0M0OPO Z0Z0S0J0 a
62 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
66
0Z0s0ZkZ o0l0Zpop 0o0Z0m0Z Z0Z0OBZb 0ZpL0Z0Z OPZ0Z0ZP 0Z0M0ZPZ Z0Z0S0J0 a
c
0s0Z0s0j Z0Z0Zpap pZ0S0Z0Z Z0ZBo0L0 0Z0ZPo0Z Zqm0M0Z0 0Z0Z0OPO Z0Z0ZRJ0
63 8
b
65
0ZrlbZ0j Z0Z0Z0op 0Z0ZPo0Z Z0ZBL0Z0 pZ0Z0SpZ Z0Z0Z0Z0 0O0ZPZKO Z0Z0Z0Z0 a
Back rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZrZkZ opZ0ZpZp 0Z0Z0ZpZ Z0ZpZ0Z0 0Z0a0Z0Z O0ZRZPZ0 0O0A0ZPO ZRZ0Z0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
67 8 7 6 5 4 3 2 1
70
rZ0Z0ZkZ Z0Z0Zpo0 Bs0Z0Z0o Z0S0m0Z0 0Z0Z0Z0Z ZpJ0OPZ0 0O0Z0Z0O S0Z0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0srZkZ ZpZ0Zpop pZ0Z0Z0Z S0ZbM0l0 0L0OPZ0Z Z0Z0Z0Z0 0O0Z0OPO Z0Z0S0J0 a
68 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
72
0s0Z0ZkZ Z0l0Zpop 0ZrZ0Z0Z Z0Z0oBZ0 0obZ0Z0Z Z0Z0ZPZ0 0O0L0ZPO S0ZRZ0ZK a
c
0Z0ZrZ0j ZpZ0O0op pa0Z0Z0Z Z0o0lNZ0 0Z0o0ZQZ O0O0Z0Z0 0O0Z0ZPO Z0Z0ZRZK
69 8
b
71
0Z0ZrZkZ o0Z0Zpop bZ0Z0ZqZ Z0LNZ0Z0 0A0Z0OPZ O0Z0Z0Z0 0OPZrZ0O Z0JRZ0Z0 a
Back rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0l0ZkZ Z0Z0Zpo0 0o0Z0a0o ZBmPZ0Z0 0ZQMrZ0Z s0Z0Z0Z0 PZ0Z0OPO Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
73 8 7 6 5 4 3 2 1
76
rZ0ZrZkZ oRZ0apop 0ZpZ0m0Z Z0Z0L0Z0 0Z0O0A0Z lBZ0Z0Z0 PZ0Z0OPO Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZrskZ Z0Z0Z0op 0ZpAbZ0Z Z0Z0Z0Z0 0opZ0Z0Z O0Z0S0Z0 0O0Z0OPO S0Z0Z0J0 a
74 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
78
rZ0ZrZkZ ZpZbZpo0 0o0Z0Z0o Z0ZPl0Z0 0S0Z0Z0Z O0ZQZBZ0 0O0Z0ZPO S0Z0Z0ZK a
c
rZ0s0ZkZ Z0l0Zpop 0Z0Z0Z0Z opZRO0Z0 0Z0Z0Z0Z ZpO0L0Z0 0O0Z0OPO Z0ZRZ0J0
75 8
b
77
0s0Z0Z0j Z0Z0mpop pZ0Z0lbZ O0Z0Z0Z0 0oRZ0Z0Z ZBZ0Z0Z0 0O0LRZPO Z0Z0Z0J0 a
Back rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rl0s0ZkZ Zpa0Zbop pZ0Z0o0Z O0MPm0Z0 0O0A0Z0Z Z0L0ZBO0 0ZPZ0Z0O S0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
79 8 7 6 5 4 3 2 1
82
rZblrZkZ opZnZpZp 0ZpZ0apA Z0ZBZ0Z0 0Z0Z0ZNZ Z0Z0ZQZ0 POPZ0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Zrs0ZkZ Z0Z0Zpo0 pM0Zpa0Z L0Z0Z0Z0 0S0Z0Z0Z O0ZqZ0Z0 0Z0Z0OPO Z0Z0ZRJ0 a
80 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
84
RmkZ0Z0Z ZpZ0Z0o0 0OpZ0oqZ Z0A0s0Z0 0O0Z0Z0Z Z0Z0Z0ZP 0Z0s0ZPL Z0Z0ZRJ0 a
c
0j0srZ0Z Z0o0Zpop 0oQZ0Z0Z Z0Z0a0l0 0Z0Z0Z0Z S0Z0Z0Z0 PO0Z0MPO Z0S0Z0J0
81 8
b
83
0Z0Z0skZ o0Z0SpZp 0Z0Z0ZpZ L0Z0Z0Z0 0Z0ZPlbZ Z0Z0Z0Z0 PZRZ0OPO Z0ZrM0J0 a
Back rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrjrZ0Z Z0Z0oQZR pZqoPo0Z Z0Z0Z0Z0 0ZpZ0O0Z Z0Z0Z0Z0 POPZ0ZPZ Z0JRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
85 8 7 6 5 4 3 2 1
88
0ZbZ0s0j opZ0Z0op 0Z0Z0Z0Z Z0l0s0Z0 0Z0o0ZnO O0ZBZ0O0 0OPL0ZKZ Z0ZNSRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0skZ Z0Z0Zpop 0Z0Z0Z0Z Z0Z0Z0Z0 0Z0Z0Z0Z Z0Z0OQZ0 rZqZ0OPO SRZ0Z0J0 a
86 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
90
rZbZ0skZ o0o0apop 0ZpZ0Z0Z Z0ZqZ0Z0 0Z0Z0Z0Z ZPZ0Z0O0 PZPZQJ0O SNA0S0Z0 a
c
rm0Z0s0j Z0Z0Z0op 0oNZ0o0Z o0Z0M0Z0 0ORZ0Z0Z OQZ0OPoq 0Z0Z0m0Z Z0S0Z0J0
87 8
b
89
0s0ZrZkZ o0Z0ZpZp 0Z0Z0ZpA l0Z0Z0Z0 0Z0Z0Z0Z Z0ZQZ0O0 PaPZ0OKO ZRZ0ZRZ0 a
Back rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
kZrZrZ0Z opZ0Z0Zp 0l0Z0Z0Z Z0ZRZNo0 0a0Z0Z0Z ZPZ0ZPZ0 0ZQZRZPO Z0Z0Z0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
91 8 7 6 5 4 3 2 1
94
0Z0Z0s0j obZ0Z0op 0opl0s0Z Z0ZpZ0M0 0ZnZ0M0Z ZQZ0O0Z0 PO0Z0Z0Z Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0ZkZ orZ0Zpop 0o0Z0lnZ Z0Z0ZNL0 0ZpZ0Z0Z Z0Z0Z0Z0 PZ0Z0OPO Z0Z0S0J0 a
92 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
96
0Z0Z0ZkZ Z0Z0Zpa0 0o0M0Z0o o0Z0Z0o0 0Z0Z0l0Z L0Z0Z0ZP POrZ0Z0Z Z0ZRS0ZK a
c
0Z0s0skZ opZ0Zpop 0Z0Z0Z0Z Z0o0Z0Z0 0Z0ZPA0m O0O0ZqOP QZ0ZRO0J Z0Z0Z0S0
93 8
b
95
0Z0Z0Z0Z Z0ZrZpj0 0L0Z0ZpZ Zpo0ZqZp 0ZBm0ObZ Z0O0Z0Z0 PO0S0ZPO Z0JRZ0Z0 a
Back rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0j0Z Z0s0mpo0 po0SpZ0o Z0Z0O0Z0 POPM0Z0Z ZKZ0Z0O0 0Z0Z0Z0O Z0ZRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
97 8 7 6 5 4 3 2 1
100
rmbZ0Zks opo0Zpop 0a0Z0Z0Z Z0ZqZ0Z0 0Z0oNZ0Z L0Z0ZNZ0 POPZ0JPO S0A0S0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
kZ0s0Z0Z opl0Z0o0 0Z0Z0o0Z Z0Z0o0ZQ 0ZnZ0Z0O Z0O0Z0O0 POBS0O0Z Z0J0Z0Z0 a
98 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
102
0ZRZ0s0j o0m0lpop no0ZpZ0Z Z0Z0O0Z0 0O0ZNZ0Z O0Z0Z0O0 0Z0Z0OBO Z0ZQZ0J0 a
c
rZ0Z0ZkZ ZpZ0Zpop 0l0Z0Z0Z onZ0o0Z0 0oQZ0Z0Z Z0Z0Z0OP PO0Z0OBZ Z0ZRZ0J0
99 8
b
101
0s0s0ZkZ Z0l0Zpop pZ0ZbZ0Z Z0Z0o0Z0 0o0ZPZ0Z Z0Z0ZBZ0 POPS0LPO Z0ZRZ0ZK a
Back rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZ0j ZqZ0snop pZ0Z0o0Z Zpo0Z0Z0 0Z0Z0ZQZ ZPZ0ZPZ0 PAPZ0JPO Z0ZRS0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
103 8 7 6 5 4 3 2 1
106
kZrZ0Z0Z opZrZ0ZR 0Z0ZqZ0Z Z0Z0oQZ0 0Z0Z0Z0Z Z0ZPZ0Z0 PO0Z0SPO Z0Z0Z0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
kZrZ0Z0Z opZqZ0Z0 0ZpM0Z0Z Z0Z0ZQZ0 0ZPZ0Z0Z ZPZ0Z0Z0 PZ0Z0ZPO Z0Z0Z0ZK a
104 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
108
0s0ZrZkZ o0ZqZpap 0Z0Z0ZpZ Z0Z0m0Z0 0Z0Z0L0Z Z0M0Z0Ob POPZ0OBO S0ARZ0J0 a
c
0Z0Z0skZ Z0l0Zpop 0Z0ZBZ0Z Z0Z0Z0Z0 0o0ZPZ0Z ZPZ0ZQaP 0ZrZ0Z0Z Z0ZRZRZK
105 8
b
107
rZ0s0ZkZ ZqZ0mpop 0Z0obZ0Z Z0Z0o0Z0 0OBZPZ0Z Z0Z0M0Z0 QZ0Z0OPO S0ZRZ0J0 a
Back rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0Z0j o0Z0Z0op 0o0Z0Z0l Z0Z0Z0Z0 0O0Z0ZPZ Z0Z0ZBLb PZ0ZPZ0O Z0ZRZ0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
109 8 7 6 5 4 3 2 1
112
0sqZ0skZ opZ0opZp 0ZnZ0ZpZ Z0oNL0Z0 0ZPZ0ZbZ Z0Z0Z0O0 PO0ZPOBO Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0ZrZkZ Z0ZRApap pZ0ZpZpZ Zpo0O0Z0 0ZPZ0Z0Z Z0Z0ZQZ0 PZqZ0OPO Z0Z0S0J0 a
110 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
114
0m0ZrZkZ Zbs0Z0op po0l0Z0Z Z0ZPo0Z0 0ZPZ0ZQZ Z0ZBZ0Z0 PA0Z0ZPO Z0S0S0J0 a
c
0ZrZRm0j ZpZqZ0op pZ0Z0Z0Z Z0Z0ZpZ0 0Z0O0Z0Z ZBO0Z0O0 PZ0ZQO0O Z0Z0Z0J0
111 8
b
113
rZ0Z0ZkZ o0ZnZpop 0Z0Z0Z0Z Z0ZpZ0Z0 0l0AnZ0Z Z0Z0ZQZ0 0Z0Z0OPO S0Z0S0J0 a
Double attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0l0Z0ZkZ Z0Z0oRZ0 pZ0ZrZpZ Z0Z0Z0O0 0Z0Z0Z0Z O0O0ZQZ0 KO0Z0Z0Z Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
115 8 7 6 5 4 3 2 1
118
0Z0Z0Z0j opZRZ0Zp 0ZpZps0Z Z0Z0a0Z0 PO0ZPZPZ Z0Z0Z0ZP 0ZPZQZ0Z Z0Z0l0MK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0ZkZ Z0Z0Z0op pZ0Z0Z0Z ZplPZrM0 0ZpZ0ZQZ Z0ZbZ0Z0 PO0Z0ZPO Z0Z0S0ZK a
116 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
120
0ZbZ0Z0j Z0o0l0op 0oPZ0Z0Z o0Z0Z0Z0 0Z0Z0s0O O0L0ZBZ0 0Z0Z0OPZ Z0ZRZ0J0 a
c
0Z0s0ZkZ ZpZ0Z0op pZ0s0o0Z Z0Z0l0Z0 0Z0mPZ0Z ZPM0Z0ZP 0O0S0LPZ Z0ZRZ0J0
117 8
b
119
rZbZ0s0j opZ0ZRop 0ZpZ0Z0Z Z0l0ZpZ0 0Z0Z0Z0Z ZBZ0Z0Z0 PZ0ZQOPO ZRZ0Z0J0 a
Double attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0mkZ o0Z0spop 0o0Z0Z0Z Z0ZqMQZ0 0Z0Z0Z0Z Z0Z0O0Z0 PZ0Z0OPO ZRS0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
121 8 7 6 5 4 3 2 1
124
0Z0s0Z0Z Z0mnS0Zp 0Z0o0ZkZ o0oPo0o0 NZPZPZ0Z O0ZNZ0O0 0Z0Z0ZKO Z0Z0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZrZkZ Z0Z0Zpop 0Z0Z0Z0Z Z0ZNZ0Z0 0ZQZPO0Z a0Z0Z0Z0 0Z0Z0lPO S0Z0Z0ZK a
122 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
126
0ZrZ0Z0j ZpZ0l0op pZbZ0o0Z O0Z0o0Z0 0OPA0L0Z Z0ZrZ0Z0 0Z0Z0OPO ZRS0Z0J0 a
c
rZblka0s opoPZ0op 0Z0Z0m0Z Z0Z0ZpA0 0ZPZ0Z0Z Z0M0Z0Z0 PO0ZPOpO S0ZQJBZR
123 8
b
125
0ZrZ0s0Z opZ0Zpj0 0m0Zqmpo Z0Z0o0Z0 0Z0ZPZ0Z O0Z0ZNMP 0O0L0OPZ Z0S0ZRJ0 a
Double attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrskZ opL0ZpZp 0ZpZ0ZpZ Z0Z0Zqm0 0ZPZ0Z0Z Z0Z0Z0Z0 PZ0SBOPO Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
127 8 7 6 5 4 3 2 1
130
rm0l0skZ Z0Z0opap pZ0Z0ZpZ ZpZnM0Z0 0Z0O0Z0Z ZBZ0Z0Z0 PO0ZQOPO ZRA0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0ZkZ0s Z0obZ0a0 0Z0ZpZ0Z opl0o0op 0Z0ZPZ0Z ZQO0M0O0 PO0ZBOPZ Z0JRS0Z0 a
128 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
132
0Z0Z0Z0j opZ0sRap 0mpZqZpZ Z0ZpM0Z0 0Z0O0Z0Z Z0O0Z0LP PO0Z0ZPA Z0Z0Z0J0 a
c
0s0Z0skZ Z0Z0Z0ap 0o0l0mpZ Z0mPopZ0 NS0ZPZ0Z Z0Z0A0Z0 0Z0Z0OPO Z0ZQSBJ0
129 8
b
131
0Z0Z0Z0Z ZpZ0Z0ok 0Z0Z0Z0o Z0Zqo0Z0 rm0oNZ0Z Z0ZPZ0Z0 PZRL0OPO Z0Z0Z0J0 a
Double attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0lrZkZ Z0ZbZpZp nZ0o0mpa ZpZPo0Z0 0S0ZPZ0Z O0M0Z0Z0 0ZQM0OPO Z0A0SBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
133 8 7 6 5 4 3 2 1
136
0Z0Z0Zrj o0Z0Z0ap 0o0L0Z0Z Z0o0A0Z0 0ZPZ0Z0Z ZPZ0S0ZP qZ0Z0ZPJ Z0Z0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0ZkZ0s ZpZbZ0op pZ0ZpoqZ Zna0ZNZ0 0Z0Z0O0A Z0O0Z0O0 POBZQZKO S0Z0ZRZ0 a
134 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
138
0sbZ0s0j Z0lnapop pZpZpZ0Z Z0ZpO0Z0 0Z0M0ZQZ Z0O0Z0M0 PO0Z0OPO S0A0S0J0 a
c
rZ0Z0skZ Zbl0apZp pZ0ZpZpZ Z0Z0Z0Zn RZ0M0Z0Z ZPZBZ0ZQ 0APZ0OPO Z0Z0S0J0
135 8
b
137
rm0lka0s ZbZ0Z0Z0 pZ0ZpoNZ Z0m0Z0Ap PoNo0Z0Z ZBZ0Z0Z0 0O0Z0OPO S0ZQZRJ0 a
Double attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrs0akZ obZ0Zpop 0Z0ZpZ0Z ZBmPZ0Zq 0Z0ZPZ0Z O0Z0ZNA0 QZ0Z0OPO Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
139 8 7 6 5 4 3 2 1
142
rZ0l0skZ o0Z0Zpop 0onZpZ0Z Z0a0Z0Z0 0m0Z0Z0Z OPM0ZBO0 0Z0A0O0O S0ZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0l0skZ Z0Z0Zpop pZ0Z0Z0Z mpZ0ObZ0 0Z0oNA0Z O0ZQZ0Z0 0O0Z0OPO Z0S0S0J0 a
140 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
144
0Z0s0Zka obZqZpZp 0o0ZpZpO Z0Z0Z0Z0 0ZrOPZ0Z O0Z0LNZ0 0A0Z0OPZ Z0ZRS0J0 a
c
rZbZ0ZkZ Z0l0a0Z0 pZ0o0ZPo Z0Z0o0ZP 0o0ZNZ0Z ZPZ0Z0Z0 0OPZQO0Z Z0J0Z0ZR
141 8
b
143
rZ0s0akZ Z0lbZ0o0 po0opZpZ Z0m0Z0Z0 Pm0ZPZ0Z ZNM0A0ZB 0OPZQZ0O S0Z0ZRZK a
Double attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbs0ZkZ opZ0Zpop 0Z0Z0m0Z Z0Z0Z0Zq 0O0m0A0Z O0MBZ0Z0 0Z0Z0OPO SQZ0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
145 8 7 6 5 4 3 2 1
148
rZ0Z0ZkZ Z0ZbZpap po0Z0ZpZ M0Zno0Z0 PZ0Z0Z0Z Z0O0ZBZ0 0O0Z0OPO S0A0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZrZkZ Zno0s0op 0opo0l0Z Z0Z0Z0M0 0O0Z0O0Z Z0Z0SQO0 0Z0Z0Z0O Z0Z0S0J0 a
146 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
150
kZ0Z0Z0Z ZpZqZpo0 pZ0o0Z0Z O0ZPZ0O0 0Z0ZRZ0s Z0Z0Z0Zr KOPZQZRZ Z0Z0Z0Z0 a
c
0Z0Z0skZ o0Z0Z0op 0Z0ZRZ0Z l0ZNZ0Z0 0aPZ0s0Z Z0ZQZ0Z0 PZ0Z0ZPO Z0S0Z0ZK
147 8
b
149
0m0ZrZkZ s0Z0apop pM0o0Z0Z l0o0Z0Z0 0Z0ZBL0Z Z0Z0Z0O0 PZ0ZPO0O ZRZ0ZRJ0 a
Double attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
qZ0Z0skZ Z0s0Zpop 0o0ZpZ0Z Z0ZnZ0Z0 0ZBO0a0Z ZQZ0Z0O0 PA0Z0O0O ZRZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
151 8 7 6 5 4 3 2 1
154
rZbZrmkZ ZpZ0Zpa0 0lpo0ZpZ Z0m0Z0Z0 0ZPMPZ0o ZPM0Z0OP 0Z0S0OBJ ARZQZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0Z0s ZpZ0j0Z0 0ZbopZ0Z o0Z0mpZ0 PZPS0Z0Z Z0M0ZPO0 0O0Z0ZKZ Z0ZBZ0Z0 a
152 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
156
0Zks0a0s o0o0m0Z0 0onZqo0Z Z0Z0o0op QZ0ZPZ0M ZNO0A0O0 PO0Z0OKO S0ZRZ0Z0 a
c
rZbZRZ0Z o0Z0Zrjp 0ZpZ0opZ Zpl0Z0Z0 0ZPZ0OnL Z0Z0Z0Z0 PO0M0ZPO ZBJ0S0Z0
153 8
b
155
rZ0ZnZ0Z Z0Z0ZkoB 0Z0Z0oNo Z0ZbZ0Z0 0lpZ0L0Z Z0Z0Z0Z0 0O0Z0OPO Z0Z0S0J0 a
Double attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Zka0s Z0onZpZp pZ0ZpZpZ ZPZqZ0MQ 0ZpO0Z0Z Z0O0Z0O0 0Z0Z0O0O S0A0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
157 8 7 6 5 4 3 2 1
160
0Z0Z0ZkZ Z0o0Z0Zp pZ0o0Z0Z Z0ZPs0Zq 0ZPZ0Z0Z Z0L0Z0Ob 0O0Z0M0O Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Zbj0s ZpZ0apZ0 0Z0Zpm0Z o0Z0M0Zp 0ZPo0A0Z Z0Z0Z0Z0 qZBZQOPO Z0ZRZRJ0 a
158 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
162
0Z0Z0Z0j Z0Z0Z0Zp pZ0o0ZrZ ZpZRaps0 0Z0Z0o0l Z0ONZQZ0 PO0Z0OPO Z0Z0Z0SK a
c
qZrZ0ZkZ obs0apop 0onZpZ0Z ZQZPZ0Z0 0Z0Z0Z0Z ZPZ0Z0O0 PA0Z0OBO Z0SRM0J0
159 8
b
161
rZblrakZ Z0Z0ZpZp 0Zpo0ZnA opZ0Z0ZQ 0Z0ZPZ0Z OBMPS0ZP 0O0Z0ZPZ S0Z0Z0J0 a
Double attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ Zpo0Zpop 0o0Z0l0Z Z0ZnZ0Z0 0O0S0Z0Z Z0OPZ0Z0 PZ0LBZPO S0Z0M0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
163 8 7 6 5 4 3 2 1
166
rZ0l0skZ Z0Z0opZp bZ0o0ZpZ Z0oPZ0Z0 0Z0aPO0Z Z0MnA0O0 PO0ZRZBO S0ZQZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0l0ZkZ ZbZ0Z0op 0opZ0O0s oBapO0Z0 0Z0ZpZ0Z OPZ0O0Z0 0A0ZQZPO Z0S0ZRJ0 a
164 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
168
0Z0s0m0Z ZRZPZ0j0 0Z0Z0ZpZ Zpo0Z0Z0 0ZpaPlBZ Z0Z0Z0Z0 0O0ZQZKZ S0Z0Z0Z0 a
c
0Z0s0ZkZ o0Z0Z0ap 0o0Z0ZpZ Z0Z0ZpZ0 0Z0OnZ0Z OqZ0ZNOP 0A0ZQO0J Z0ZRZ0Z0
165 8
b
167
0ZrZ0ZkZ Z0Z0Zpo0 0ZbZpZ0o Z0Z0SPZ0 0ZpMPZ0Z Z0Z0L0Z0 0l0Z0ZPO Z0Z0Z0J0 a
Deflection
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0skZ0s opZ0opap 0Z0Z0o0Z l0ZNZ0Z0 0Z0L0O0Z Z0Z0Z0Z0 POPZ0ZPO Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
169 8 7 6 5 4 3 2 1
172
rZ0Z0skZ o0l0ZpZp 0ZpZ0ZpZ Z0apm0Z0 0ZPZ0L0Z ZBZ0Z0Ob PO0M0O0O S0A0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0skZ Z0ZQZNZp 0Z0ZnOpZ Z0opZ0Z0 0Z0ZqZ0Z Z0O0Z0ZP 0Z0Z0ZPZ Z0Z0ZRZK a
170 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
174
0Z0s0l0j oQZ0ZBZp 0Z0Z0Z0Z Z0ZRZ0o0 0Z0Z0ZbZ Z0Z0Z0O0 PO0ZrZ0O Z0Z0ZRJ0 a
c
0Z0Z0ZrZ L0ZbjpZ0 0o0o0Z0S Z0oPZ0oB 0Z0ZpZ0Z Z0Z0O0Z0 0Z0ZKOPZ Z0l0Z0Z0
171 8
b
173
0Z0Z0skZ S0Z0o0Zp 0Z0aqZpA ZpZ0Z0Z0 0O0ONmPZ Z0O0ZQZP 0Z0Z0Z0Z Z0Z0Z0J0 a
Deflection
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZrZ Zplko0Zp pZbo0Z0Z Z0Z0ZNZp 0Z0LPO0Z Z0O0Z0Z0 PO0Z0ZrO S0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
175 8 7 6 5 4 3 2 1
178
0Z0Z0s0j Z0ZbZ0o0 pZ0Z0Z0o ZpSpS0Z0 0O0O0ZqZ O0Z0ZpO0 0Z0Z0LnO ZBZ0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZbZ0skZ opZ0Z0op 0Z0ZpZ0Z l0Z0mpZ0 0Z0ZBA0Z Z0Z0Z0O0 PO0Z0O0O Z0SQZRJ0 a
176 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
180
rm0lka0Z opo0o0Zr 0Z0Z0ZpZ Z0Z0MbAp 0ZBOpZ0Z Z0Z0Z0Z0 POPZ0ZPO S0ZQZRJ0 a
c
0Z0l0s0Z s0ZBZ0jp pZ0aQopZ mpZPZ0Z0 0Z0Z0Z0A Z0Z0ZPZ0 0Z0Z0ZPO Z0S0S0J0
177 8
b
179
rZbZ0Zks o0mplpZp 0o0Z0ZpA Z0Z0o0Z0 0ZPZNZ0Z Z0Z0Z0L0 PZ0S0OPO Z0ZRZ0J0 a
Deflection
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0aRs0ZkZ Z0Z0Zpo0 pZ0ZpZpZ l0Z0Z0Z0 0o0ZNO0Z Z0Z0O0ZP PZ0ZQZPZ Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
181 8 7 6 5 4 3 2 1
184
0Z0ZrZ0j S0Z0Z0Zp 0Z0m0s0l Z0ZQo0Z0 0Z0Z0o0Z Z0Z0ZPZ0 PO0ZNZ0O Z0Z0Z0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0s0ZkZ Z0Z0lpa0 pZ0ZnZpZ ZpZ0mpZ0 0Z0Z0Z0Z ZPZ0OPM0 PA0ZQZNO ZRZ0Z0J0 a
182 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
186
0Z0l0skZ s0Z0Z0o0 0ZbonZPZ o0oNZpZ0 PZPmPZ0o Z0ZPA0ZP 0Z0Z0L0J ZRZBZRZ0 a
c
0Z0ZkZ0Z o0O0Z0o0 0ZqZno0o Z0ZNZ0Z0 0Z0Z0Z0Z ZQZ0ZPO0 0Z0Z0ZKO Z0Z0Z0Z0
183 8
b
185
rZ0ZrZkZ ZpZ0ZpZp pZ0a0ZpZ Z0ZPZ0Z0 0Z0L0lPZ Z0Z0Z0ZP PO0Z0OBZ S0ZRZ0J0 a
Deflection
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Z0Z Z0ZrZnjp pl0O0o0Z ZpZ0sPoP 0ZpSNZPZ Z0Z0S0Z0 0O0L0OKZ Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
187 8 7 6 5 4 3 2 1
190
rZnZnskZ o0Z0ZpZp 0l0Z0ZpL Z0o0oNZ0 0oBZPZPZ Z0Z0ZPZ0 POPZ0Z0O ZKZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
nZrZrZkZ SQZ0Zpap 0Z0AplpZ ZPZ0Z0Z0 0Z0o0Z0Z Z0Z0M0O0 0Z0ZPO0O Z0ZRZ0J0 a
188 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
192
0Z0Z0Z0Z Z0s0SpZk 0Z0Z0ZpZ Z0AQZ0Z0 0ZPZ0Zqm Z0Z0Z0Z0 0Z0Z0O0Z Z0Z0ZKZ0 a
c
0Z0s0ZkZ ZpZ0ZpZ0 pZ0ZpZpZ Z0O0Z0ZR qZ0Z0Z0Z Z0Z0ZRL0 0Z0s0Z0O Z0Z0ZBZK
189 8
b
191
0Z0Z0Z0Z Z0Z0Z0ok 0ZQZ0Z0o Z0Z0ZpZ0 0Z0Z0Oqm ZPZrZ0Z0 PZ0Z0ZPO Z0A0ZRJ0 a
Deflection
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrZkZ opo0Zpap 0Z0o0ZpZ Z0Z0Z0l0 0ZPZPm0Z Z0M0APZ0 PO0L0ZPO S0ZBZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
193 8 7 6 5 4 3 2 1
196
rZbs0Z0j opZ0lpop 0ZpZ0Z0M Z0Z0ZpZ0 0ZPO0Z0Z Z0Z0Z0Z0 PO0L0ORO Z0JRZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Zrs0ZkZ ZbZ0Zpop pa0ZpZ0Z ZpZ0O0Z0 0O0ZBOnl O0M0Z0O0 0A0ZQZ0O S0Z0ZRZK a
194 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
198
0ZrZ0Z0S o0ZkmrS0 0o0o0Z0Z Z0o0o0o0 0ZPZBZ0Z Z0OPZPZ0 PZ0Z0ZKZ Z0Z0Z0Z0 a
c
ks0ZrZ0Z oRo0Z0op QZPZ0Z0Z Z0Z0Z0Z0 Po0ZpZ0Z Z0ZpZ0ZP 0Z0Z0lPJ Z0S0Z0Z0
195 8
b
197
rZ0ZkZ0s Z0ZbZpop pZ0Z0Z0Z ZpaBZPZq 0Z0ZPZnZ Z0OQA0Z0 0O0Z0ZPO SNZ0ZRJ0 a
Deflection
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0j0Z obo0ZrZ0 0o0Z0Z0o Z0Z0S0oP 0OPZ0Z0Z Z0Z0Z0Z0 PJBL0l0Z Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
199 8 7 6 5 4 3 2 1
202
0s0ZrZkZ Zbo0ZpZp pZqZ0ZpA Z0Z0Z0Z0 Po0m0Z0Z ZBZ0SPL0 0ZPZ0ZPO Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0s0Z0Z0j o0o0Z0op 0Z0Z0Z0Z Z0Z0Z0Z0 0Z0ZpZ0Z O0O0S0Z0 0O0L0lrZ Z0JRZ0Z0 a
200 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
204
0Zrl0skZ Z0Zbapop pZ0Zpm0Z ZpZpM0Z0 0ZnO0A0Z O0MBO0ZQ 0O0Z0OPO Z0S0ZRJ0 a
c
rZ0Z0skZ ZpabZ0op pZpZpZ0l Z0OpZ0Z0 0O0OnZ0Z O0Z0A0ZP 0ZQZBOPZ S0Z0ZRMK
201 8
b
203
0Z0Z0ZkZ Z0Z0Zpop 0Z0ZpZ0Z o0a0m0Z0 PoPZPl0Z Z0Z0ZbAP 0Z0ZBZ0J S0Z0SQZ0 a
Deflection
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Z0Z o0Z0l0jp 0o0ZPmpZ Z0ZpL0Z0 0ZpO0Z0Z ZnO0Z0M0 0A0Z0ZPO Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
205 8 7 6 5 4 3 2 1
208
0ZrZ0ZkZ M0Z0ZpZp 0Z0Z0ZpZ S0ZbL0Z0 0o0Z0Z0l Z0Z0Z0Z0 0O0Z0ZPO Z0Z0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0s0Z0akZ Z0ZbZqZp pZ0Z0ZpZ Zro0Z0ZR 0ZPZ0M0Z O0A0Z0O0 0OQZ0Z0O Z0JRZ0Z0 a
206 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
210
rZ0s0ZkZ ZpZ0Zpop 0Z0a0Z0Z oPZnZ0Zq 0Z0MpZ0Z O0Z0ObOP 0ARZBO0J Z0S0ZQZ0 a
c
0Z0Z0Z0Z Z0Z0opak 0Z0Z0ZpZ Z0SPOqZn 0ZNZ0Z0Z S0Z0ZPZp 0Z0A0ZPO Z0Z0ZKZ0
207 8
b
209
kZ0sRZ0Z opl0Zpa0 0m0s0Z0o A0o0ZQZP 0ZpZ0Z0Z O0Z0ZNO0 KO0S0O0Z Z0Z0Z0Z0 a
Deflection
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0ZbL Zpo0ZkZp pZ0Z0MpZ Z0o0ZrO0 0Z0Z0Z0l Z0ZPSpSP POPZ0O0Z Z0Z0Z0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
211 8 7 6 5 4 3 2 1
214
0Zks0Z0s opo0lpo0 0ZpZ0Z0Z Z0a0ZbZ0 0ZPZpOPZ ZPZ0O0o0 PAQOBZ0Z SNZ0J0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0l0ZkZ Z0Zrspo0 po0o0Z0o Z0ZbZ0Z0 PONOpL0Z Z0Z0O0ZP 0Z0Z0OPZ Z0S0ZRJ0 a
212 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
216
0sqZks0Z o0Zbo0a0 0Z0o0Z0o ANoPm0o0 pZPZ0ZPZ S0Z0Z0ZP 0ZBZQO0Z Z0Z0ZRJ0 a
c
rZ0Z0s0Z opZ0Z0jp 0ZpMbZ0Z Z0O0ZRZn 0Z0Z0Z0Z ZPZ0l0OP PZQZNZ0J Z0Z0ZRZ0
213 8
b
215
0Z0Z0skZ Z0Z0Zpap pZ0o0ZrZ l0ZPZ0Z0 0Z0A0Z0Z Z0Z0ZQZ0 PZ0Z0ZPO Z0S0ZRZK a
Deflection
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Z0Z obZ0Z0jq 0o0o0o0Z ZPo0s0o0 PZQmPZ0Z Z0M0ZPO0 0Z0Z0ZBs ZRZ0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
217 8 7 6 5 4 3 2 1
220
rZblrZkZ Z0Z0Zpap 0Z0o0mpZ o0ZPZ0A0 0S0ZPZ0Z ZPZ0ZPM0 0Z0LBZPO S0Z0Z0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0ZrZ o0ZqZpj0 0onZpZpZ Z0opO0O0 0Z0O0LpS Z0O0Z0Z0 PO0M0Z0Z Z0Z0ZRJ0 a
218 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
222
rjbZ0Z0s Z0Z0SpZp pZPS0o0a Z0Z0Z0Z0 0Z0Z0Z0Z Z0Z0ZNZ0 PZ0Z0OPO Z0Z0Z0J0 a
c
0Z0ZrZrj Z0onZ0a0 0o0o0l0o Z0ZPZpZ0 0OPZpO0Z Z0Z0Z0ZR 0ZQZBZPO Z0A0ZRJ0
219 8
b
221
0Z0Z0ZkZ Z0Z0Z0o0 0ZqZpZPZ Z0Z0OnZQ 0Z0Z0Z0Z Z0Z0ZRA0 0Z0Z0Z0J Z0s0Z0Z0 a
Decoy
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Z0Z ZpZ0ORZ0 pZ0Z0Z0j Z0sNl0Zp 0Z0Z0Z0Z JPZ0Z0Z0 PZ0Z0ZRO Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
223 8 7 6 5 4 3 2 1
226
0Z0Z0ZRZ o0Z0ZrZ0 0o0Z0s0o Z0Z0Lbok 0O0Z0Z0Z O0ZqZ0O0 0Z0Z0S0J Z0A0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0s0Z0j o0Z0Zqop 0o0Z0Z0Z Z0O0L0m0 0ZPZ0M0Z Z0Z0Z0O0 PS0Z0O0O Z0Z0Z0ZK a
224 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
228
rZ0Z0s0Z Z0Z0Z0jp 0ZplpopZ obS0Z0Z0 0Z0O0Z0Z Z0Z0LNZ0 PO0Z0OPO Z0S0Z0J0 a
c
0Z0ZrZ0Z opZns0Z0 0ZpZ0Z0o Z0Z0oka0 0Z0ZRO0Z ZPANZ0O0 PZPZKZ0Z Z0ZRZ0Z0
225 8
b
227
rZ0s0ZkZ opZbopap 0Z0l0ZpZ Z0ZPm0Z0 0ZBZPZ0O ZQZ0APZ0 PZ0ZNZPZ Z0S0J0ZR a
Decoy
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0ZkZ ZpZ0lpo0 0mpZpZpZ o0Z0M0Z0 0ZPONZ0Z aPZ0Z0ZR 0Z0ZQOPO Z0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
229 8 7 6 5 4 3 2 1
232
0Z0Z0Z0s o0ZkZ0o0 0onZps0Z Z0ZpZ0Op PZ0O0Z0m Z0APZ0JN RZ0Z0O0O Z0S0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Zrl0Z0Z opZ0ZpZk 0Zno0a0o Z0oNZPZ0 0ZPZ0Z0Z Z0ZBZ0L0 PO0Z0ZPO Z0Z0S0J0 a
230 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
234
rZ0Z0skZ ZpZ0Z0Zp pA0ZqZpZ O0ZQa0m0 0Z0Z0Z0Z ZNO0Z0O0 0O0Z0Z0O S0ZRZ0J0 a
c
rZ0ZrZkZ Z0Z0Zpo0 pZpZ0Z0o Z0OpZ0Z0 0Z0Z0Z0Z l0MQO0AP 0Z0Z0OPZ Z0Z0J0ZR
231 8
b
233
0ZksbZns opo0Z0op 0Zna0o0Z ZNZ0Z0Z0 0Z0Z0AqZ Z0ZBZNZ0 POPZ0OPO S0ZQS0J0 a
Decoy
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0skZ opZ0lpZp 0Z0M0ZpZ Z0oQO0Z0 bZPZ0O0Z Z0Z0Z0Z0 PO0Z0ZPO Z0J0ZBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
235 8 7 6 5 4 3 2 1
238
0Z0s0Z0Z ZbZra0j0 pZ0Z0Z0o O0Z0ZPZ0 0o0o0o0Z ZPZBZ0Z0 0ZRZ0A0O Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0s0ZkZ ZpZ0S0o0 pZqZ0oQo Z0Z0Z0Z0 0Z0Z0Z0Z ZPZ0Z0O0 PA0Z0O0O Z0ZbZ0J0 a
236 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
240
0Z0s0ZkZ Z0Z0S0Zp 0Z0Z0ZpL Z0ZqZ0Z0 0opZBZ0Z Z0Z0Z0Z0 0O0Z0OKO Z0ZrZ0Z0 a
c
0Z0Z0s0Z opo0j0Z0 0a0Z0o0Z Z0Z0Z0ZQ 0ZpZ0ZNO Z0O0Z0Z0 PZ0ZqOPZ Z0ZRZ0J0
237 8
b
239
0Z0Z0Z0Z Z0Z0Z0Z0 0Z0Z0oko O0ZRZpZ0 0Z0Z0Z0Z Z0ZPZ0o0 0Z0Z0lPZ Z0Z0ZRZK a
Decoy
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ska0s o0ZbopZp 0ZBZ0ZpZ Z0o0Z0Z0 QZ0ZPZ0Z Z0l0Z0Z0 PZ0ZKOPO ZRA0Z0MR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
241 8 7 6 5 4 3 2 1
244
kZ0Z0Z0Z opZNZ0Z0 0Z0ZPZ0Z Z0Z0ZPZ0 0Z0Z0Z0Z Z0Z0ZpZ0 0S0Z0Z0Z A0Z0ZKmq a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZblrZkZ Z0Z0Z0Z0 pZpZpa0Z Z0Zpm0MR 0Z0Z0OpZ Z0ZQZ0Z0 POPZBZ0Z Z0JRZ0Z0 a
242 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
246
rZ0s0ZkZ o0l0Zpap bonZpZpZ Z0o0Z0Z0 0Z0mPM0Z Z0Z0A0O0 POPZNOBO Z0LRS0ZK a
c
rZbmrZ0j Z0Z0l0op pZ0SpZ0Z ZpZ0LpZ0 0O0Z0Z0O O0Z0O0Z0 0A0Z0OPZ ZBS0Z0J0
243 8
b
245
0Z0Z0Z0Z L0Z0ZBak 0Z0Z0ZpZ Z0Z0s0Zp 0Z0Z0Z0Z Z0Z0Z0OP 0Z0Z0O0J ZrZ0Z0Z0 a
Decoy
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0lka0s opo0opop 0Z0Z0Z0Z Z0ZnZbZ0 0Z0Z0Z0Z Z0Z0ZNO0 PO0OPO0O SNAQJBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
247 8 7 6 5 4 3 2 1
250
0ZrlrZkZ Z0Z0Z0ap 0m0Z0Z0Z o0o0Z0oP Pm0oBM0Z ZPZ0Z0O0 0Z0A0O0Z ZRZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0s0Z Z0Z0M0jp pZ0Z0Z0Z Z0ZpMpZ0 0ZbOnlpL O0Z0Z0Z0 0O0Z0OPO Z0Z0S0J0 a
248 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
252
0Z0Z0ZkZ opl0Z0ap 0ZnZ0mpZ Z0Z0ZpZ0 0ZPZ0O0Z Z0Z0JBM0 PO0Z0Z0O SQZ0Z0Z0 a
c
0ZrZkZ0s Z0Z0ZpZ0 0Z0obZ0Z oPmNo0l0 PZ0ZPanZ Z0Z0ZPA0 0ZBZ0ZPZ ZRZQSNJ0
249 8
b
251
0ZrZ0skZ obZ0Z0op 0o0ZpZ0Z Z0Z0Mpl0 0Z0O0m0Z Z0Z0ZPZ0 PO0S0ZPO SBZ0L0J0 a
Decoy
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0j0s0Z0s ZpZ0ZBop papZ0o0Z Z0ZnZqZ0 QZ0ORZ0Z A0Z0ZPZ0 PZ0Z0ZPO Z0S0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
253 8 7 6 5 4 3 2 1
256
rZ0ZkZ0s opZnm0o0 0lpZ0obZ Z0Z0ZPZ0 QZBZPZPZ Z0M0Z0Z0 PO0Z0ZKZ S0ARZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0lkZ0Z ZpZbapZ0 pZ0ZpmrZ Z0Z0o0Zp 0Z0ZPZ0A Z0M0ZQOB POPZ0Z0Z Z0JRZRZ0 a
254 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
258
rZbZra0j Z0Z0ZQZp pZ0ZpZpZ Z0Z0o0O0 qoBZPZ0Z Z0Z0Z0Z0 POPZ0Z0O Z0JRZRZ0 a
c
0Z0Z0Z0Z o0Z0l0Z0 PZ0apj0m Z0o0o0o0 0ZBZPZ0Z ZQZ0A0Z0 0Z0Z0OPZ Z0Z0Z0J0
255 8
b
257
0Z0ZrZ0Z Z0Zqm0ok 0Z0ZpZ0Z Z0ZpOpLP 0Z0O0M0Z Z0Z0ZPZ0 0Z0Z0ZPZ Z0S0Z0J0 a
Decoy
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0skZ opZRZ0ap 0Z0ZpZpZ Z0Z0Z0M0 0l0mPo0Z Z0M0Z0ZP PO0Z0OPZ Z0ZQZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
259 8 7 6 5 4 3 2 1
262
0Z0Z0Z0Z Z0Z0ZkZ0 0O0Sro0Z Z0Z0ZNo0 0ZPZ0Z0o Z0J0Z0Z0 0Z0Z0O0Z Z0Z0Z0Zb a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0Z0s Z0obZ0j0 0Z0o0mpa Z0lPo0Z0 0ZPZPZ0Z Z0MQZ0O0 0ZNZBZKZ Z0Z0Z0S0 a
260 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
264
rZbl0Z0j Zpo0Z0ap 0Z0Z0mpZ Z0mPo0Z0 0ZNZPZ0Z Z0M0Z0Z0 0ZQZ0ZPO ZRA0ZBJ0 a
c
0Z0ZrZkZ Z0Z0apZp qZ0Z0mpZ o0ZpL0M0 0Z0Z0Z0O O0A0S0Z0 0O0J0OPZ Z0Z0Z0Z0
261 8
b
263
rZbl0skZ opo0m0Zp 0Z0o0mpa ZNOPopZ0 0O0ZPZ0Z Z0Z0Z0Z0 PZ0MBOPO S0AQZRJ0 a
Decoy
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0ZkZ oRZ0ZpZ0 0ZnZ0ZpL Z0ApZ0Z0 PZ0O0Z0J Z0Z0ZRZP 0Z0ZrZqZ Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
265 8 7 6 5 4 3 2 1
268
0Z0Z0ZkZ o0sRspo0 QZ0Z0Z0o ZpO0Z0Z0 0O0ZnZqO Z0Z0Z0Z0 0A0Z0Z0Z ZKZRZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZrZ0Z o0S0Z0ak 0o0LqZpo ZNZbo0Z0 PZ0o0Z0Z Z0ZPZ0O0 0O0ZPO0Z Z0Z0A0J0 a
266 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
270
0Z0Z0ZkZ opZbo0Z0 qZ0oNspZ Z0Z0Z0L0 0ZrZPZ0Z Z0M0ZPZ0 POPZ0Z0Z ZKZ0Z0ZR a
c
rZbZrmkZ Z0ZnlpZp 0Z0Z0ZpL Zpo0o0Z0 pZ0ZPZ0Z O0O0ZNMP 0OBZ0OPZ Z0ZRS0J0
267 8
b
269
0Z0Z0ZkZ obS0ZpZp 0o0o0ZpL Z0Z0s0Z0 0Z0Z0ZqO Z0Z0Z0M0 PZ0Z0OPZ Z0Z0Z0J0 a
Decoy
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0skZ s0l0Zpo0 bZpM0m0o o0Z0o0Z0 PZ0ZPZ0M L0OnS0O0 0Z0Z0OBO Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
271 8 7 6 5 4 3 2 1
274
0Z0Z0ZkZ Z0l0Zpo0 pZBZpZ0o Z0ZnO0Z0 0o0Z0O0Z Z0Z0Z0O0 POQZ0Z0O Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZrZkZ Z0ZbZpZ0 0ZpZ0lpZ Z0ZpZ0Zp 0Z0O0Znm s0ZBO0M0 0ZQZROPO ZRZ0ZNJ0 a
272 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
276
0Z0ZrZkZ o0Z0Zplp 0a0Z0S0Z Z0oNZ0Z0 0ZPZ0L0Z O0Z0O0ZP 0Z0Z0ZPJ Z0Z0Z0Z0 a
c
rZbZ0Zrj opZ0oQZp 0Zno0o0A Z0ZRZPo0 0Z0ZPZ0Z O0lBZ0ZP 0ZPZ0ZPJ Z0Z0ZRZ0
273 8
b
275
bZ0Z0Zrj o0Z0opap 0o0o0Z0Z Z0Z0mPL0 0ZPZqZ0Z Z0Z0A0ZP PZPZBS0J Z0Z0Z0S0 a
Clearance
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rmbZrZ0Z o0Z0Zpak 0Z0o0Zpo lNoPZ0Z0 0oPZnA0O Z0ZBZ0Z0 POQZ0OPZ ZKZRZ0MR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
277 8 7 6 5 4 3 2 1
280
rZ0l0skZ opZ0apop 0ZnZ0Z0Z Z0O0Z0Z0 NZ0onZ0Z Z0Z0Z0O0 POQAPONO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Zrs0ZkZ Z0Z0Zpop pZbZpm0Z l0o0Z0Z0 PZBZPL0Z S0ONZPZ0 0Z0Z0ZPO ZRZ0Z0J0 a
278 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
282
rZ0Z0skZ Z0Z0ZpZ0 pZbZpLpl Z0Z0Z0Z0 0A0ZPZ0Z Z0MRZ0Z0 POPZ0ZPO ZKZ0Z0Z0 a
c
rZ0ZkZ0M opobl0op 0Z0Z0m0Z Z0ZPonZ0 0ZBO0Z0Z Z0O0Z0aP PO0ZQZPZ SNA0ZKZR
279 8
b
281
rZbm0s0j ZpZ0a0o0 pZ0ZpmQo Z0ZqM0Z0 0Z0O0Z0M Z0O0Z0Z0 PZBZ0OPO S0Z0ZRJ0 a
Clearance
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Zba0Z O0l0Z0j0 QZ0o0Z0o Z0oPo0oP 0ZBZPZ0Z Z0A0Z0Z0 0Z0Z0ZPZ S0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
283 8 7 6 5 4 3 2 1
286
0ZrZkZ0s Z0ZbZpa0 pZ0opo0Z Z0l0ZPZ0 0ZpZPZ0o O0M0ZNZ0 0OPZQZPO Z0ZRZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0s0ZkZ opZQZpo0 0Z0Z0Z0Z Z0Z0ZPZ0 0Z0ZpO0Z Z0Z0a0ZP POPZ0ZRZ ZKZ0ZBZ0 a
284 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
288
qZ0ZrZkZ ZbZ0apo0 0Z0Z0Z0o ZponO0Z0 0m0ZNZ0Z ZBZ0ZNZP 0O0Z0OPZ Z0AQS0J0 a
c
0sbl0akZ Z0Z0Z0Zr 0Z0o0ZnZ Z0ZPo0m0 0Z0ZPoPZ Z0MQZ0Z0 0O0ZBZPZ ZRZNARJ0
285 8
b
287
rZ0Z0Z0Z opZ0Z0ok 0ZnZ0Zqo Z0Z0ZpZ0 0Z0o0Z0Z O0Z0ZQA0 0OPZROPO Z0Z0Z0J0 a
Clearance
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblnsnj o0Z0Z0ap 0Z0o0Z0Z Z0oPZpZ0 0ZPZpO0Z Z0M0Z0Z0 PZ0ABZPO ZRMQZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
289 8 7 6 5 4 3 2 1
292
RZbZnskZ Z0Z0Z0Zp 0Z0Z0Zpl Z0MPLnZ0 0ZPZ0o0Z Z0M0Z0Z0 0Z0Z0ZPO Z0Z0ZBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0lns0j Z0obZ0a0 nZ0o0ZpZ oNZPo0Zp PZ0ZPo0Z A0Z0ZPZ0 0ZQMBZPO ZRS0Z0J0 a
290 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
294
rZ0s0Z0j ZpZ0l0ap 0Znobm0Z ZNZ0o0o0 0OPZPo0Z Z0Z0ZPZ0 0ZQZBZPO ZRZRANZK a
c
0s0l0skZ Z0ZbmnZ0 0o0Z0opa o0oPo0Zp 0ZPZPZ0Z O0M0Z0AP 0Z0MBOPZ ZRZQZRJ0
291 8
b
293
rZ0Z0l0j ZpM0Z0ap 0O0Z0mpZ Z0o0o0Z0 0ZNZPZnZ A0Z0ZBOb 0Z0ZQZ0O ZRZ0Z0J0 a
Clearance
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0M0skZ ZpZ0ZpZp 0Z0Z0ZpZ Z0Z0M0Z0 0Z0SnZ0Z S0Z0Z0Z0 0Z0ZrZPO Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
295 8 7 6 5 4 3 2 1
298
rZ0lns0Z ZpZbZ0ak nZ0o0Z0o o0oPZpZ0 0ZPZpO0M OPM0A0OP 0Z0L0Z0Z ZRZ0SBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0skZ opo0Z0ap 0Z0o0Z0Z Z0ZPobZ0 0ZPZ0Z0l Z0ZBZPZ0 PO0Z0M0O S0ZQZRJ0 a
296 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
300
rZbarZkZ ZpZnZ0Zp pZ0l0ZpZ Z0oPo0Z0 0ZPZPo0Z ZRM0ZPZP PZQZ0APZ ZRZ0ZBJ0 a
c
rZbl0skZ ZpZ0Z0m0 0Zpo0o0a o0ZPo0Zp 0ZPZPZpO Z0MBM0O0 PO0ZQSPZ Z0Z0ZRJ0
297 8
b
299
0Z0Z0skZ ZpZ0ZrZp 0Z0o0mpa o0ZPo0Zq QZ0Z0Z0Z Z0M0oPZ0 PO0Z0ZPO Z0M0SRJ0 a
Clearance
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0ZkZ Zpo0l0Z0 0Z0Z0Z0Z o0ZPo0Zp 0ZPZPZpZ Z0M0Z0O0 PO0Z0L0Z Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
301 8 7 6 5 4 3 2 1
304
rZ0Z0skZ opo0Z0Z0 0Z0Z0aqZ Z0oPZ0o0 0ZPZ0oBZ Z0Z0Z0Z0 PO0Z0OPZ S0ZQZKZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0mrZkZ0s Zpl0apo0 pZ0ZpZ0o ZPZpO0ZP PZ0Z0A0Z ZNO0L0Z0 0Z0Z0OPZ S0Z0S0J0 a
302 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
306
0Z0j0Z0s o0Z0ZpZp bo0ZpM0Z Z0ZpO0Z0 0Z0L0Z0Z ZqZ0Z0O0 0s0Z0Z0O Z0S0M0JR a
c
rZ0Z0skZ ZbZ0Zpa0 pZ0Z0Z0Z ZpZpoPlp 0Z0Z0Z0Z Z0OBM0Z0 PO0ZQOPO S0Z0ZRJ0
303 8
b
305
rZ0l0skZ ZpmbZpa0 0Z0o0mpo o0Zpo0Z0 0ZPZPZPO Z0M0A0Z0 PO0MBO0Z S0ZQJ0ZR a
Clearance
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0ZkZ o0Znm0ap 0ZpZbspZ Z0O0o0Z0 QZ0oPo0Z Z0ZNZPZ0 PO0ABZPO ZNSRZ0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
307 8 7 6 5 4 3 2 1
310
0Z0Z0s0Z Z0l0o0j0 pZ0ZQZpZ Zpo0ZnM0 0Z0a0Z0Z ZPZ0Z0Z0 PZ0Z0ZPO Z0S0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0Z0Z Z0Z0Z0Zp 0Z0Z0Zpj ZPZ0Z0s0 0ZPZ0LBJ S0Z0Z0ZP 0Z0Z0ZrZ Z0Z0Z0l0 a
308 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
312
0ZkZqZ0Z opZ0ZPZ0 0Z0Z0Z0Z Z0ZpZ0Z0 0LpO0Z0Z O0ObZ0Z0 0Z0ZrZ0Z S0ZKZ0ZR a
c
0Z0Z0skZ opZ0Z0o0 0Z0Z0Z0Z Z0ZNZ0Zp 0ZPZ0Z0O ZPZ0Z0J0 PZ0s0m0Z S0Z0S0Z0
309 8
b
311
rZ0ZbZ0Z oNS0Z0Z0 kZ0Z0Z0Z Z0ZpZnZ0 PZ0o0A0Z Z0O0Z0Z0 0ZPZ0OrO ZRZKZ0Z0 a
Clearance
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zbl0mka Z0o0Z0Zp 0Zpo0Z0L s0Z0ZNoN pZ0OPZ0Z Z0O0Z0Z0 PO0Z0ZPO Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
313 8 7 6 5 4 3 2 1
316
rZ0Z0skZ Z0ZqZpop pZnZ0Z0Z ZpopO0ZN 0Z0Z0LbZ ZPZ0ZNZ0 0OPZ0OPO Z0Z0SRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZrZ0Z Z0Z0ZrZp RZpZ0opZ ZpZbj0Z0 0Z0ZpMPO Z0O0J0Z0 0ZPZ0O0Z Z0ZRZ0Z0 a
314 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
318
rZ0Z0ZrZ o0obl0Zk 0apZnZ0o Z0MpOpZ0 0Z0Z0O0Z ZNZ0A0Z0 POPZ0L0O Z0Z0ZRZK a
c
0Z0Z0ZkZ opZbZrZ0 0Z0O0Z0o Z0ZQZ0o0 0O0ZpZ0Z O0Z0OnZq 0Z0S0O0O Z0ZRZNZK
315 8
b
317
0srmbakZ opZqZ0Zp 0m0ZpOpZ Z0ZpO0L0 0Z0O0ZNZ ZPZ0Z0O0 PA0M0ZBZ Z0Z0ZRJ0 a
Clearance
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0sqs0Z ZbZ0ZpZp pZ0ZnO0j ZpopOQa0 0Z0O0ZPO ZPO0M0Z0 0O0Z0Z0Z S0A0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
319 8 7 6 5 4 3 2 1
322
0Z0Z0s0Z Z0Z0Z0Zk QZ0O0lpo o0Z0S0Z0 0o0Z0Z0Z Z0Z0Z0O0 0Z0ZRZKO Z0Z0ZrZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0m0Z0j ZpZqapZr pZ0Z0ZpZ m0ZpO0Zp 0Z0O0M0Z OPZQZNS0 0Z0Z0ZPO S0A0Z0J0 a
320 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
324
rZ0ZnZrj o0Z0l0Zp 0oRapZ0Z Z0ZpMpZN 0Z0O0O0Z Z0Z0Z0ZR PO0ZQZPO Z0Z0Z0J0 a
c
rZbl0Z0Z o0Z0Zrjp 0ZpZ0o0m Z0OpZPoQ 0Z0O0Z0Z Z0ZBZ0MP PZ0ZRZPZ Z0Z0S0J0
321 8
b
323
0Z0ZrZkZ Zpo0lpo0 0Z0o0Z0o Z0ZPZ0Z0 POPZ0S0Z Z0ZQZ0Z0 RZ0Z0JPO Z0Z0s0Z0 a
Clearance
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0l0s0Z Z0Z0apj0 pZ0ZpZ0Z ZpM0M0mp 0ZpO0Z0Z Z0Z0OpAb POQZ0Z0O ZBZRJ0S0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
325 8 7 6 5 4 3 2 1
328
0Zrl0s0j o0Z0S0a0 0Z0Z0ZPZ ZpZ0L0Zp 0Z0Z0ZbO ZBZ0ZpZ0 POPZ0ZPZ Z0JRZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZbj0ZrZ opo0Z0a0 0Zno0lNo Z0Z0Z0oQ 0ZPZPo0Z Z0Z0Z0O0 PO0Z0ZBO S0A0ZRJ0 a
326 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
330
0l0srZkZ Z0Z0Zpap pobopmpZ Z0m0Z0Z0 0ZPZPZ0Z ZPM0Z0OP PANZROBZ Z0ZRL0J0 a
c
rZ0Z0Z0Z o0ZbZNZ0 nZ0OkZ0o Z0o0Z0o0 0ZpZ0ZPZ O0Z0Z0JP 0ZBZ0Z0Z Z0Z0ZRZ0
327 8
b
329
rZbZ0skZ opZpopap 0lnZ0mpZ Z0Z0Z0Z0 0ZBMPZ0Z Z0M0APZ0 POPL0ZPO S0Z0J0ZR a
Discovered attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ opZ0lpZ0 0ZnZ0m0o Z0ZpZ0o0 NO0a0ZbZ O0Z0ZNO0 0Z0APOBO Z0SQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
331 8 7 6 5 4 3 2 1
334
rZ0Zkl0s o0obZ0Zp 0o0Z0o0Z Z0Z0o0Z0 0ZBmNZ0Z O0Z0Z0Z0 0OPSQO0O Z0JRZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rmbs0ZkZ Z0Z0opa0 0l0Z0ZpZ o0o0Z0Z0 Po0MNZ0Z ZBZ0A0Z0 0OPL0OPZ Z0JRZ0ZR a
332 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
336
0Z0s0s0j opZ0Z0op 0Z0Z0Z0Z Z0Z0Z0M0 0Z0ZRZ0Z Z0ZQZ0Z0 POnZ0lPO S0Z0Z0ZK a
c
0ZrZnj0Z Z0Z0lpaQ 0Z0ZbZ0Z ZpZ0SpO0 0Z0ZPZ0Z o0Z0Z0Z0 PAPZ0Z0Z ZKZ0Z0ZR
333 8
b
335
0Zra0skZ Z0Z0Z0op 0Z0o0Z0O Z0ZPoqA0 pZPZQZRZ OpZ0Z0Z0 0O0Z0Z0Z J0Z0Z0S0 a
Discovered attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ Z0o0lnap pZpo0ZpZ Z0Z0ZpZ0 0ZPLPZ0Z ZPM0ZNZP PA0Z0OPZ Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
337 8 7 6 5 4 3 2 1
340
0s0Z0Z0Z Z0j0Z0Z0 0o0ZpZ0o ZQZpOpZ0 0OpO0Z0Z S0Z0Z0O0 0ZPZqZPZ Z0J0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZRZ0Z Z0Z0Zrsk 0Z0o0Z0Z o0ZqZ0Zp PZ0A0Z0Z Z0O0Z0ZP 0O0L0ZPZ Z0Z0Z0J0 a
338 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
342
0Z0s0ZkZ obZrZpo0 0onZ0l0o Z0ZBZ0Z0 0Z0Z0ZQZ O0Z0ZNO0 0O0Z0OPZ Z0ZRS0J0 a
c
0Z0ZrmkZ Z0lnZ0o0 pZ0ZbZ0o Zpo0M0Z0 0ZPZ0Z0Z Z0Z0O0L0 PA0Z0ZPO ZBZ0ZRJ0
339 8
b
341
0Z0s0ZkZ Z0Z0Z0Zp bl0ZpZpZ o0S0OpZ0 Po0Z0Z0O Z0Z0LBZ0 0O0Z0OPZ Z0Z0Z0J0 a
Discovered attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrakZ Z0ZqZpop rZ0Z0Z0Z o0ZpZNZ0 0m0ZPA0Z Z0Z0Z0SP 0O0Z0OPZ Z0ZQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
343 8 7 6 5 4 3 2 1
346
rZbZ0skZ Z0Z0Zpop pZ0SnZ0Z ZpZ0o0l0 0Z0ZPZ0Z O0A0ZQO0 0OBZ0Z0J S0Z0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZrskZ oponZ0op 0Zno0Z0Z Z0ZNZ0Zq 0ZPZ0O0Z OPZ0ZRZ0 0A0Z0ZPO S0ZQZ0J0 a
344 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
348
rm0lkZ0s opZ0Zpa0 0Z0ZpZ0o Z0ZbZ0Z0 0ZBZ0Z0Z Z0O0ZNZ0 PZ0A0OPO S0ZQS0J0 a
c
0Zrs0ZkZ ZbZqapop no0ZpZ0Z o0ZpA0Z0 0ZPZ0MnZ OPM0Z0O0 0L0ZPOBO Z0SRZ0J0
345 8
b
347
rZ0ZrZkZ opoqZpop 0a0Z0mnZ Z0ZpZ0A0 0Z0OPZ0Z ZBMQZPZ0 PO0Z0OKO S0Z0Z0S0 a
Discovered attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrl0skZ opm0a0op 0ZnZbZ0Z Z0Z0M0Z0 0Z0ZNZQZ Z0Z0O0O0 0A0Z0OBO Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
349 8 7 6 5 4 3 2 1
352
0s0Z0ZkZ ZqZ0ZpZp 0Z0opZpZ ZbZ0ZnZ0 0L0Z0O0Z ZNZ0Z0Z0 0OPZ0APO Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0ZrmkZ obZ0Zpo0 0Z0opZ0o ZqZ0Z0AQ 0O0O0Z0Z Z0Z0M0S0 PZ0Z0OPO Z0Z0S0J0 a
350 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
354
0Z0Z0Z0j ZbZrZ0o0 pZ0Z0Z0o ZpZ0lNZ0 0Z0aPZ0Z Z0ZQZ0Z0 PZ0Z0ZPO ZBZRZ0ZK a
c
0Z0ZrZ0j o0Z0Z0lp bo0ZBZpZ Z0ZPZpZ0 0ZnZ0M0Z Z0S0Z0Z0 PL0Z0OPO Z0Z0Z0J0
351 8
b
353
rZqZ0skZ obZ0Zpo0 0o0Z0m0m Z0Z0ZQZp 0OBM0Z0Z O0Z0Z0A0 0Z0Z0OPO Z0SRZ0J0 a
Discovered attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0skZ Z0ZqZ0Zp po0ZpZpZ Z0ZnZ0Z0 PZBSQZ0Z Z0Z0Z0Z0 0O0Z0sPO Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
355 8 7 6 5 4 3 2 1
358
rZ0Z0Z0Z ZplnZ0jp 0ZpZpZpZ o0Z0o0Z0 Pm0ZPs0Z Z0L0ZNMP 0OPZ0OPZ S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rm0s0ZkZ obZ0Zpo0 0o0ZpZ0o l0Z0Z0AQ 0Z0Z0ZRZ Z0ZBZ0Z0 0Z0Z0OPO Z0ZRZ0J0 a
356 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
360
RZ0Z0Z0Z Zpo0Z0ak 0Z0Z0Zpo ZPoNZ0Zn 0ZQo0O0Z Z0ZPZ0O0 0Z0ZqOBJ Z0Z0s0Z0 a
c
0Z0ZrZ0s o0o0Z0j0 0o0Z0ZqZ Z0Z0S0mR 0Z0Z0ZPZ Z0Z0Z0L0 PO0Z0OPZ Z0Z0Z0J0
357 8
b
359
0ZqZrZkZ ZpZnZpZp 0ZpZ0apZ Z0OpZ0Z0 0O0O0OPm Z0ZBZ0A0 0Z0Z0Z0O L0ZNZRJ0 a
Discovered attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZrZ ZpoQSNak 0Z0o0Z0o o0ZPZ0oB 0ZPl0Z0Z Z0ZbZ0O0 PO0Z0ZPJ Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
361 8 7 6 5 4 3 2 1
364
rZ0Z0Z0Z Z0Z0Z0ak 0Z0MRZpo o0ZPZ0Z0 0mPZ0ZqZ Z0Z0ZNZ0 0Z0Z0OPZ ZQZ0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0s0ZkZ0s Zbl0apop pZ0ZpZ0Z ZpZnZ0Z0 0Z0M0Z0Z ZPZBZ0ZQ PAPZ0OPO Z0ZRZRJ0 a
362 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
366
0Zks0a0s Z0ZnZ0o0 pZ0ZpZ0Z l0ZbZ0O0 No0Z0Z0Z ZPZ0A0ZB PZPL0Z0Z Z0JRZ0ZR a
c
0ZrZ0ZkZ Z0Z0Zqmp pZ0ZpZpZ Z0ZpZ0Z0 0a0M0ZQA Z0Z0Z0Z0 PO0Z0OPO Z0ZRZ0J0
363 8
b
365
rZ0Z0Z0Z ZpZ0orjp pZ0Z0opZ l0m0ZbO0 0ZPL0Z0M Z0M0Z0ZP PO0Z0O0Z Z0JRS0Z0 a
Discovered attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0s0Z o0ZnZ0Z0 bo0ZpZkZ Z0apO0o0 0Z0M0ZNs Z0Z0ZPZ0 PO0Z0AKZ S0Z0S0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
367 8 7 6 5 4 3 2 1
370
rZ0Z0s0Z ZbZ0Z0op 0ZnZ0ZkZ o0Z0ZpM0 0oqO0Z0Z Z0Z0ZQZ0 0O0Z0ZPJ S0A0ZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0s0Z0l0j o0Z0s0Zp 0Z0L0ZbZ Z0Z0o0SN 0Z0o0Z0O Z0Z0ZPZ0 POPZ0Z0Z Z0JRZ0Z0 a
368 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
372
0ZrZrZkZ ZbZ0ZpZp pZ0Z0ZpZ Zpl0m0Z0 0Z0Z0Z0Z ZPm0Z0ZP PL0ZNOPZ ZBS0SNJ0 a
c
rZ0Z0skZ Z0Z0Zqop 0Z0Z0Z0Z Z0ZQZ0Z0 0o0Z0Z0Z ZPZ0Z0ZP PA0Z0ZPZ Z0Z0S0J0
369 8
b
371
rZ0l0ZkZ ZbZ0Zpap pZ0Z0ZpZ ZpZpm0Z0 0ZpZ0Z0Z O0M0O0ZB 0OQS0OPO Z0Z0ZRJ0 a
Discovered attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZblrZkZ Z0Z0spZp pZ0o0ZpZ Z0ZPZ0Zn 0ZPonO0Z Z0ZBZ0O0 POQZ0ZNO S0A0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
373 8 7 6 5 4 3 2 1
376
0ZrZ0Z0Z ZpZkZpa0 0Z0ZpZpZ ZqZ0O0Z0 pZpO0OPZ O0A0ZQZ0 0O0Z0ZKZ Z0S0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0Z0Z Z0lbZko0 pZ0ZpZpZ Z0ZpS0Z0 0Z0M0O0Z Z0O0Z0LP Ps0Z0ZPJ Z0Z0Z0Z0 a
374 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
378
rZ0Z0skZ ZqZ0Zpo0 pZbo0Z0o ZpZ0ZPa0 0Z0A0ZnZ O0M0Z0S0 BOPL0ZPO Z0Z0ZRZK a
c
0a0Z0ZkZ ZpZ0ZrZ0 pZpZ0o0Z Z0O0Z0oQ PZ0O0Z0Z Z0ZqANZn 0Z0ZROPZ Z0Z0ZKZ0
375 8
b
377
rZbZrZkZ ZpZ0lpap pZ0M0ZpZ Z0oRm0Z0 0ZPZ0Z0Z ZPM0Z0O0 PZQZPO0O S0A0Z0J0 a
Discovered attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
qZ0s0ZkZ abZ0ZpZ0 0Z0ZpZ0A Z0Z0Z0Z0 0ZQZnZpZ Z0Z0Z0O0 0Z0ZBZ0O S0Z0MKZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
379 8 7 6 5 4 3 2 1
382
0ZbZ0s0Z spo0Zpjp 0Z0oqZ0Z Z0oRZ0O0 0ZnZPZNZ Z0O0ZBZ0 0O0Z0L0O ZKZ0Z0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0skZ s0l0ZpZp pZ0ZpL0Z ZbOpZpZ0 0S0Z0Z0Z Z0ZBO0Z0 PZ0Z0OPO ZRZ0Z0J0 a
380 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
384
0ZrZrlnZ Z0Z0Z0ok pZ0oPoRo ZpZ0ZPZQ 0ZpaPZPZ Z0Z0Z0ZR PZBA0Z0O Z0Z0Z0ZK a
c
0Z0sqs0Z o0Z0ZpZk bo0Z0Z0Z m0o0OpZ0 0Z0Z0Z0o Z0ONZBZP PO0ZQZ0J S0ZRZ0Z0
381 8
b
383
0Zrl0skZ obZna0Zp 0Z0Z0ZpZ Z0opZpZ0 0Z0Z0Z0Z ZPA0ONZB PZ0ZQOPO S0ZRZ0J0 a
Opening up the diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Z0s opZ0Z0j0 0Z0onZpZ l0oBZbZ0 0ZPZ0Z0Z Z0Z0ZNS0 0O0Z0OPZ Z0L0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
385 8 7 6 5 4 3 2 1
388
0Zrl0ZkZ obZ0ZpZp 0o0Z0apA Z0ZPZ0Z0 nZ0Z0Z0Z O0Z0LNZ0 BZ0Z0OPO Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0srakZ Zbl0Zpop po0Z0Z0Z Z0ZpOPZ0 0O0Znm0Z Z0M0LNZ0 PA0Z0ZPO ZBZ0SRZK a
386 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
390
0ZrZ0skZ obl0apop 0o0ZpZ0Z m0Z0Z0Z0 0ZPO0Z0Z O0ZBZNZ0 0A0ZQOPO Z0ZRZRJ0 a
c
rZbZ0skZ opl0Zpop 0Z0ZpZ0Z mBO0m0Z0 PZ0ZPA0Z L0O0ZPZN 0Z0Z0ZPO S0Z0J0ZR
387 8
b
389
0Zrs0j0Z Z0l0apo0 0Z0ZpZ0o m0o0Z0Z0 0Z0OQZ0Z o0A0ZNZP PZ0Z0OPZ Z0SRZ0J0 a
Opening up the diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0Z0skZ obZ0lpop 0Z0ZpZ0Z Z0OnO0Z0 PoBZ0Z0Z ZNZ0ZNZ0 0O0Z0OPO S0ZQJ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
391 8 7 6 5 4 3 2 1
394
rZbZ0skZ opZ0Zqa0 nZ0o0Zpo Z0oPZpZ0 0ZPZ0Z0M ZPA0Z0O0 PZQZ0OBO S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0sqZ0m Z0o0s0ok 0o0Z0o0o o0o0ZRZP PZ0ZPZ0Z ZPAPZ0L0 0ZPZ0ZPZ Z0Z0ZRJ0 a
392 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
396
nZ0l0s0j Z0Z0apZp 0Z0ZpZ0Z Z0Z0O0o0 0ZpONL0Z Z0o0Z0ZR 0Z0Z0OPO Z0A0Z0J0 a
c
0mblrskZ Z0Z0a0Zp pZRZpZpZ ZpZpO0Z0 0O0L0Z0Z O0Z0ZNZP 0A0Z0OPZ Z0ZBS0J0
393 8
b
395
0ZqsrZkZ obZ0Zpop 0Z0Z0m0Z ZNapM0Z0 0Z0Z0O0Z O0ZQZ0Z0 0APO0ZPO ZRZ0ZRZK a
Opening up the diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Zkmns opZ0Z0Zp 0ZpSbopZ Z0A0o0Z0 0Z0ZPZ0Z Z0M0Z0Z0 POPZBOPO Z0JRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
397 8 7 6 5 4 3 2 1
400
rZ0l0Z0j obZ0Z0op 0o0o0ZrZ Z0Z0Zpm0 0O0ZnZ0Z O0ZQO0Z0 0A0ZBOPO Z0ZRMRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZbs0akZ ZplnZ0op pZnopZ0Z Z0Z0Z0Z0 0Z0ZPZ0Z Z0MBZNL0 POPZ0ZPO S0A0ZRZK a
398 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
402
qZ0Z0ZkZ ZrZ0Zpa0 0Z0Z0mbo Z0LPm0Z0 0s0ZPZ0Z ZPM0Z0M0 PZKABZ0O Z0ZRZ0S0 a
c
rZbZrZkZ Zplnapop pZnopZ0Z Z0Z0Z0Z0 0Z0ZPO0Z Z0MBZNL0 POPZ0ZPO S0A0ZRZK
399 8
b
401
0s0Z0ZkZ ZpZqZ0sp 0o0ZbSnL Z0o0O0Z0 0Z0ZPZ0Z Z0ZPZ0O0 PA0Z0ZBZ Z0Z0ZRJ0 a
Opening up the diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0ZkZ Z0a0Zpop pZpZ0Z0s Z0Zpm0Z0 0Z0Z0Z0Z APM0O0O0 PZ0Z0OBO Z0SQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
403 8 7 6 5 4 3 2 1
406
0sbZrZkZ ZpZ0Zpap pZ0Z0ZpZ O0oqO0Z0 0ZNZ0ZPZ Z0OBZ0mP 0Z0Z0Z0J S0AQS0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0s0j Zbl0Z0Zp pZ0Z0apZ Z0Zpm0Z0 NO0Z0Z0Z L0OBA0ZP 0Z0Z0ZPZ Z0ZRZRJ0 a
404 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
408
0Z0l0s0j s0mbZ0op 0ZpZ0Z0Z o0OpOpZ0 Po0L0M0a Z0Z0APZB 0O0ZPZ0O Z0ZRZ0SK a
c
0Z0Z0mkZ obs0ZpZ0 0Z0Z0ZpZ Z0MpZ0Z0 0Z0O0Z0Z O0LBl0OP 0Z0Z0ZKZ Z0S0Z0Z0
405 8
b
407
rm0Zka0s ZbZpZ0op po0Zpo0Z Z0Z0ZqZ0 0ZPLNA0Z Z0Z0Z0O0 PO0Z0OBO S0Z0ZRJ0 a
Opening up the diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0ZrZkZ Zbm0Zpap po0l0mpZ Z0oPM0A0 PZBZ0Z0Z Z0M0Z0ZP 0O0L0OPZ S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
409 8 7 6 5 4 3 2 1
412
rZ0s0ZkZ opZ0mpop 0Z0l0Z0Z Z0ZPZ0M0 bZBZ0Z0Z Z0Z0Z0Z0 PZ0L0OPO Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Zrl0akZ spZ0Zpop pZpZ0Z0Z Z0Z0ORZ0 0Z0Z0ZQZ Z0ZBZ0Z0 POPZ0ZPO S0Z0Z0ZK a
410 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
414
rZblrZkZ opZ0apo0 0ZnZ0Z0o Z0ZnM0Z0 0ZpONA0Z Z0Z0Z0O0 PO0Z0OBO Z0SQZRJ0 a
c
0ZrZ0Z0j obZ0l0ZP 0o0Z0Z0Z Z0ZPo0Z0 0Z0ZpZ0Z ZPZ0S0Z0 PArL0ZPO Z0Z0ZRJ0
411 8
b
413
rmblka0s Z0Z0opZp 0Z0o0mpZ o0ZPZ0Z0 0oPZPZ0Z Z0Z0ZNZ0 0O0M0OPO S0AQJBZR a
Opening up the diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
qZ0Z0Zrs ZbZ0a0j0 po0ZpZpZ Z0o0OpO0 0ZPZ0O0S Z0ABZ0ZR PO0Z0Z0L Z0Z0J0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
415 8 7 6 5 4 3 2 1
418
rZ0ZnskZ o0obZqop 0Z0o0o0Z Z0oPZNZ0 0ZPZPS0Z O0OBZ0Z0 0Z0ZQZPO Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
qZ0s0ZkZ obsnZpop 0o0Zpa0Z Z0o0Z0Z0 0ZPO0Z0O ZPZ0ZNO0 PAQZ0OBZ Z0ZRS0J0 a
416 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
420
rZ0Zrj0Z obZ0apo0 0m0Z0Z0o l0oPZBZ0 0o0Z0A0Z Z0Z0ZNZ0 POQZ0OPO S0ZRZ0J0 a
c
rZ0l0skZ opZ0opa0 0Z0onZpL Z0ZRZ0Z0 0ZPZ0ZBZ Z0Z0ARZ0 PO0Z0ZPO Z0Z0Z0J0
417 8
b
419
0Z0Z0sbj o0Z0Z0o0 qm0Z0o0o Z0Z0s0Z0 0ZpMBZ0Z a0O0Z0ZR PZQA0OPO Z0Z0ZRJ0 a
Opening up the diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0s0j ZbZ0Z0Z0 po0Z0Zpo Z0Z0ZpZ0 PZ0M0o0l ZNOBmPZ0 0O0Z0aPO S0L0Z0SK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
421 8 7 6 5 4 3 2 1
424
rZblrZkZ oponapo0 0Z0Z0Z0o Z0O0Z0Z0 0Z0ONZ0Z Z0ZQZNZ0 POBZpZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0akZ Z0ZnZ0o0 pZ0o0l0Z Z0obZPM0 pm0Z0Z0Z Z0Z0S0ZP 0O0Z0OPZ ZBAQZ0J0 a
422 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
426
rZnlbs0Z opo0m0ak 0Z0Z0ZpZ Z0ZPo0Op 0Z0ZPZ0Z ZBM0APM0 PO0Z0ZQZ ZKZRZ0ZR a
c
rZ0l0skZ o0o0ZpZ0 bo0ZpZno m0ZpO0o0 0ZPO0Z0A O0O0ZPZN 0ZQZ0ZPO SBZ0J0ZR
423 8
b
425
rZqZ0skZ opZ0a0ob 0ZponZ0o Z0Z0ZpZ0 0ZPZ0m0Z ZPZPMBZP PA0LPZ0M S0Z0Z0SK a
Opening up the diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0skZ o0l0Zpop 0ZnZ0m0Z Z0o0o0Z0 0ZPZ0Z0Z O0ABOPZ0 0ZQZ0O0O S0ZRZKZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
427 8 7 6 5 4 3 2 1
430
rZbl0skZ opZ0m0ap 0Z0o0ZpZ Z0oPo0Z0 0ZPZPZBZ Z0M0A0Z0 PO0M0Z0O S0ZQJ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0skZ Z0Z0Z0Z0 pZ0Z0lpL ZpZ0Z0Z0 0ZnZRZ0Z Z0O0Z0Z0 0Z0Z0ZBO Z0Z0Z0ZK a
428 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
432
0s0Zrm0j Z0Zbl0op 0Zno0Z0Z Z0Z0oPS0 0o0ZPZ0L ZPZ0ZBS0 0APZNZ0O Z0Z0Z0ZK a
c
0Z0Zkm0s sbo0l0mp 0o0oPZpZ Z0Z0ZpZ0 0ZPM0Z0Z ONZBO0Z0 0Z0Z0OPO S0ZQJ0ZR
429 8
b
431
rZblrZkZ opZnZpZp 0Zpa0mpZ Z0ZpZ0Z0 0Z0O0Z0Z ZQMBONZ0 PO0A0OPO S0Z0ZRJ0 a
Opening up the diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrlrakZ Z0ZnZpZ0 pZ0o0m0o ZpZPZPo0 0Z0A0ZPZ Z0ZQZ0MP POPZ0ZBZ Z0Z0SRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
433 8 7 6 5 4 3 2 1
436
0s0ZqZ0j Zpmbs0op 0Z0o0a0Z o0oPZpZ0 PmPZ0O0Z ZPM0O0ZP 0Z0A0ZQZ ZKMRZBS0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0arl0skZ ZpZ0ZpZp pZ0Z0mpZ Z0mpZQZ0 0Z0Z0Z0Z ZPM0O0ZP PA0ZNOPZ S0ZRZKZ0 a
434 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
438
0Z0s0skZ o0Z0apop 0obZpZ0Z Z0Z0AnZq 0Z0Z0O0Z ZNOBZ0O0 PO0Z0L0O Z0ZRS0J0 a
c
0lrs0ZkZ Z0ZnZpop 0o0ZpZ0Z Z0Z0Z0Z0 baPZ0Z0Z Z0ZBL0MP 0A0Z0OPZ Z0S0S0J0
435 8
b
437
0s0l0skZ ZbZ0opZp 0Z0o0ZpZ ZpmNZ0Z0 0Z0Z0Z0Z ZPZ0Z0O0 PL0ZPOBO S0ZRZ0J0 a
Long diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0akZ ZpZqmbZp 0Z0Z0ZpZ ZPZ0ZpZ0 0Z0A0Z0Z Z0L0Z0OP rZ0ZNOBJ Z0Z0S0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
439 8 7 6 5 4 3 2 1
442
rZbZ0s0j opo0Z0ap 0Zno0Z0Z Z0Z0Znl0 0ZBO0ZpZ Z0O0Z0A0 PO0MQMKO Z0Z0S0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0ZrZkZ obo0Z0op 0o0oNm0Z Z0ZPZpZ0 0ZPZ0OqO A0OQO0O0 PZ0Z0Z0J Z0Z0SRZ0 a
440 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
444
rZbmrZ0j Z0Z0l0op pZ0SpZ0Z ZpZ0LpZ0 0O0Z0Z0O O0Z0O0Z0 0A0Z0OPZ ZBS0Z0J0 a
c
0Z0Z0ZkZ Z0ZrZ0op 0ZqZ0o0Z Zpa0Z0Z0 0ZpZ0Z0Z O0Z0O0O0 0A0Z0O0O ZQS0Z0J0
441 8
b
443
0Z0Z0Zrj ZboqZ0sp pZpZnZpZ Z0ZpOpZ0 0O0Z0O0Z Z0L0ARZ0 PZPZBZPO Z0ZRZ0ZK a
Long diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
bZ0s0ZkZ o0Z0opZp 0Z0ZnZpZ Z0O0Z0Z0 0Z0Z0Z0Z Z0O0L0O0 PZ0MqO0O Z0A0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
445 8 7 6 5 4 3 2 1
448
rZbZ0skZ Zpl0Zpop pZ0a0m0Z Z0Z0ZNZ0 0ZBZpZ0Z ZPZ0ZQZ0 PAPZ0OPO S0Z0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Zrm0Z0Z o0Zqo0jp 0o0Z0ZpZ Z0oPZrZ0 0ZPZ0Z0Z Z0Z0A0Z0 PZQZ0OPO ZRZ0ZRJ0 a
446 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
450
rZ0Z0ZkZ Z0o0l0a0 no0o0ZpZ o0mPZrOp 0ZPZpO0O OPM0A0Z0 0J0LBZ0Z Z0ZRZ0ZR a
c
rZ0Z0j0s ZbZ0Z0o0 pZ0lpmBZ Zpm0L0o0 0ZpZ0O0Z Z0M0Z0Z0 PO0Z0ZPO S0A0ZRJ0
447 8
b
449
0Z0srZkZ ZpZqa0Zp pO0Z0ZpZ Z0o0ZpZ0 0Z0ZRL0Z Z0ZPZ0Z0 0OPA0ZPO Z0Z0S0J0 a
Long diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0s0Z o0Zpl0jp 0onZ0Z0Z Z0o0o0Z0 0ZbZ0O0Z Z0Z0L0O0 PA0Z0ZBO S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
451 8 7 6 5 4 3 2 1
454
rZ0Z0ZkZ ZpZ0Zpo0 0o0Z0l0o ZPZbL0Z0 PZ0O0Z0m Z0Z0Z0Z0 0Z0A0OPO S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0ZkZ o0Z0Z0Zp 0mpl0ZpZ Z0o0s0Z0 0Z0Z0Z0Z ZPZPZ0O0 PZ0Z0Z0O S0AQS0ZK a
452 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
456
rZrZ0ZkZ Z0Z0SpZp pZ0Z0Z0Z ZbZpZqOp 0o0A0Z0Z Z0Z0Z0Z0 POPL0Z0O Z0J0Z0S0 a
c
0Z0Z0Z0Z j0l0Zpo0 po0spZ0Z Z0ZnZ0Z0 PZ0Z0Z0Z ZRZ0Z0OP 0ZPZQZBZ Z0Z0Z0J0
453 8
b
455
rZ0s0ZkZ obZ0Zpop 0onZpZ0Z ZNO0Z0Z0 PZPZnZ0Z L0Z0O0Oq 0A0ZBO0O S0ZRZ0J0 a
Long diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lrZka Zpm0ZpZp 0Zpo0ZpA Z0Z0obZ0 0OPZ0Z0Z Z0MPZBO0 0Z0LPO0O ZRZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
457 8 7 6 5 4 3 2 1
460
0Z0l0skZ Z0Z0Zpap 0Z0obZpZ o0Z0Z0Z0 0orZBL0Z Z0Z0M0Z0 POPZ0OPO Z0JRS0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0skZ ZqZnZpop pZ0Zpm0Z Z0obZ0Z0 0Z0Z0Z0M OPL0Z0O0 0A0ZPOBO Z0ZRZRJ0 a
458 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
462
0ZrZrZkZ opZNobZp qZ0Z0opA m0Z0Z0Z0 0ZnZ0Z0Z Z0Z0Z0OP PZ0ZROBZ L0ZRZ0J0 a
c
0Z0Zbsnj opo0Z0Z0 0Z0o0Z0o Z0ZPZpO0 0ZPZ0A0O Z0l0ZBZ0 PZ0Z0L0Z Z0Z0S0ZK
459 8
b
461
0Z0s0Zrj Z0lnobZp 0Z0Z0opZ Zpo0Z0Z0 0O0APOBZ Z0Z0Z0ZR 0Z0Z0LPO Z0S0Z0J0 a
Long diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
qZ0ZrZkZ o0Z0ZpZp 0Z0L0ZpZ ZPZ0Z0Z0 0Z0Z0Z0Z A0Z0Z0Z0 bZ0Z0OPO S0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
463 8 7 6 5 4 3 2 1
466
0Z0a0Zrj o0ZrZpZp 0Z0l0o0L ZpZbSPo0 0ZpO0ZNZ Z0Z0Z0O0 POPZ0A0O Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZbZqskZ o0o0Z0a0 0o0o0Z0Z Z0ZPOpZ0 0ZPZPZ0Z ZnM0ApZ0 PO0Z0O0Z S0ZQJ0S0 a
464 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
468
rZbZnskZ Z0Z0l0ap 0ZpZ0Z0Z o0m0opZ0 0Z0Z0Z0Z O0M0ZNZ0 0A0Z0OPO S0ZQSBJ0 a
c
0ZrZ0s0j Z0Zqapop po0ZbZ0Z ZNZpO0Z0 PZ0A0Z0Z Z0O0Z0S0 0O0L0ZPO Z0Z0ZRJ0
465 8
b
467
0Z0ZrskZ lpZnZ0Zp 0Z0Z0ZpZ o0oPZ0Z0 0Z0ZRZ0Z ZPZ0Z0ZP PA0Z0OPZ Z0ZQZBJ0 a
Long diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZkZ Z0Z0Zpo0 0LbS0Z0o ZpZ0m0Z0 0O0ZpZ0O Z0Z0Z0O0 0ZPZ0OBZ l0ZNZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
469 8 7 6 5 4 3 2 1
472
0ZrabZkZ l0ZnZpo0 0Z0ApZ0o o0o0Z0Z0 NZPZ0Z0Z ZPZRZ0O0 PZ0Z0OBO Z0ZQZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0s0skZ Z0l0Z0o0 0Z0Z0Z0Z ZpZbo0A0 0Z0Z0Z0Z OPZ0Z0O0 0Z0ZQZ0O S0Z0S0J0 a
470 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
474
0j0Z0Z0s o0ZrZpZ0 0o0apo0Z ZPl0Z0Z0 RZBZ0Z0Z Z0O0Z0O0 0O0ZQO0O S0Z0Z0J0 a
c
0Z0srZkZ ZbZpmpZp pl0A0ZpZ Z0o0ZpZ0 0ZPZ0Z0M O0L0O0Z0 0O0Z0OPO Z0JRZ0ZR
471 8
b
473
0Z0s0Z0Z ZbZ0ZpZp pZ0Zpj0Z ZpZ0ZqZ0 0Z0Z0O0Z ZBZ0Z0O0 POPZQZ0J Z0Z0Z0S0 a
Long diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0skarZ ZbZnZpZp 0l0Zpo0Z oBZ0Z0ZQ Po0M0Z0Z Z0Z0O0O0 0O0Z0O0O S0ARZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
475 8 7 6 5 4 3 2 1
478
0Z0Z0skZ s0Z0lpop 0oPZ0mbZ o0Z0Z0Z0 0Z0Z0Z0Z O0Z0O0ZB 0A0L0O0O Z0S0J0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZkZ0Zrs Zbo0lpZ0 0a0Z0Z0Z ZpZ0o0Zp 0Z0ZnZ0Z ZBO0ZNZ0 0O0ZQOPO SNZ0ZRJ0 a
476 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
480
0Z0Z0ZkZ opL0Z0op 0ZnZ0Z0Z Z0Z0ZpZ0 0Zbs0MqZ Z0Z0Z0Z0 PO0Z0S0O S0Z0Z0ZK a
c
rZ0Z0skZ obo0l0op 0onZpZ0Z Z0Z0OpZ0 0Z0O0m0Z Z0MBZNZ0 PO0L0OPO S0Z0ZRJ0
477 8
b
479
0Z0ZrskZ o0Z0Z0ap 0Zpo0ZqZ Z0mPZpZ0 0ZbZpOPA Z0Z0Z0ZP POBL0M0Z Z0J0S0ZR a
Long diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrmkZ Zpl0apop pZbo0Z0Z O0Z0ZNO0 0Z0ZPZ0Z Z0MPA0ZQ 0O0Z0Z0O S0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
481 8 7 6 5 4 3 2 1
484
rZ0s0ZkZ obZ0a0Zp 0oqZ0ZpZ Z0Z0ApZ0 0Z0Z0O0Z ZPM0m0L0 PZ0Z0SPO SNZ0Z0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZbZ0s0j Z0l0Zpop pZ0Z0ZrZ Z0o0Z0Z0 0ZBZPZ0Z Z0L0ZPZP PZ0Z0O0Z A0Z0Z0SK a
482 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
486
rZ0ZRakZ ZpZ0ZpZp 0Zpl0ZpZ Z0Z0L0Z0 0ZPMnZ0Z ZPZ0Z0ZP rA0Z0OPZ Z0Z0ZRJ0 a
c
bZrs0akZ Z0l0Zpop po0o0m0Z Z0Z0oPZ0 PZPZPZ0Z ZPMQZ0Z0 0ANZ0ZPO Z0Z0SRZK
483 8
b
485
0Z0Z0Zrj Z0Z0ZRap 0o0o0ZpZ o0o0Z0On 0ZPZBZ0Z ZPlPZ0ZP PZ0Z0LKZ Z0A0Z0Z0 a
Long diagonal
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0ZkZ o0Z0Z0a0 0o0Z0opZ Z0ZpZ0Z0 0Z0ZrO0Z O0mQZNZ0 0JPZ0ZPZ Z0Z0Z0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
487 8 7 6 5 4 3 2 1
490
0Z0Z0ZkZ o0l0ZpZp 0s0ZnZpZ M0Zps0Z0 0ZPZ0Z0Z Z0L0O0Z0 0Z0Z0OPO ZRZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZrZ0s Z0o0ZpZ0 pZkapZ0Z OpZnZpZp 0O0O0Z0Z Z0O0A0O0 0S0J0ONO Z0ZRZ0Z0 a
488 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
492
bjrZnZ0s Z0ZqapZp pZ0opZpZ ZpZ0Z0O0 0O0MPO0Z O0MPZ0Z0 0Z0Z0L0O ZKS0S0A0 a
c
0Z0ZrZ0Z o0lnskZp 0o0ZpZpZ ZPZ0Z0o0 0Z0A0O0Z Z0O0ZQZ0 0Z0ZRZ0O Z0Z0S0J0
489 8
b
491
0Z0Z0Z0s Zblpjpo0 pZ0ZpZ0Z Z0Z0Z0Z0 0o0ZPO0s Z0Z0L0ZP POPZ0ZPZ S0ZNZRJ0 a
Opening up a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZrZ Z0Z0jpZ0 pZbSpo0Z Zps0O0Z0 0Z0Z0a0o OBO0M0Z0 0O0Z0ZPO ZKZRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
493 8 7 6 5 4 3 2 1
496
rmbZ0Z0s ZpZ0j0op 0o0Z0o0Z Z0Z0M0Z0 0ZBZ0Z0Z a0Z0A0Z0 PZ0Z0OPO J0ZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZrZ0skZ onl0o0Zp 0o0o0ZpZ Z0ZPZpZ0 0ZPZ0Z0Z ZPZ0Z0O0 PZ0L0OBO S0Z0S0J0 a
494 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
498
0sbZ0Z0s Z0Z0Z0op 0o0j0o0Z Z0ZPo0Z0 RZPZPZ0Z Z0Z0Z0Z0 0Z0ZBZPO ZRZ0Z0J0 a
c
rZrZ0ZkZ Z0ZnlpZp 0o0ZpZpZ o0ZpO0Zn 0Z0O0O0O O0ABZ0Z0 0O0L0O0Z Z0J0Z0SR
495 8
b
497
rZ0ZbZ0Z o0Z0jpaN 0Z0ZpMpZ lPZ0Z0Z0 0Z0A0ZPZ O0Z0OPZ0 0OrZ0Z0Z ZKZRZBZR a
Opening up a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0s0ZkZ o0Z0Zpop 0lpZ0Z0Z Z0Z0ObZ0 0Z0a0O0Z ZPO0ZNZ0 PZ0AQZPO Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
499 8 7 6 5 4 3 2 1
502
0Z0Z0Z0Z o0Z0ZkZ0 PZ0Z0o0Z Z0a0o0Z0 0Z0ZbZNZ ZPZ0ZqOQ 0ZrZ0A0O Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZkZ0s0Z opZrZpa0 0ZbO0Z0o Z0ZpZQo0 0Z0ZNO0Z l0Z0O0O0 0Z0ZBJPZ ZRS0Z0Z0 a
500 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
504
rZ0Z0j0s ZnZblpZ0 0o0o0m0Z Z0oPo0op 0OPZ0Z0Z Z0Z0O0A0 0L0MBOPO Z0S0ZRJ0 a
c
0Z0ZkZ0Z l0Z0mra0 pZpA0Z0Z ZpZ0opop 0Z0Z0Z0Z Z0OQZPZP POBZ0ZPZ Z0ZRZ0ZK
501 8
b
503
0ZrZ0lkZ o0M0ZpZ0 0o0Z0LpZ m0oRZ0Z0 0Z0Z0ZpZ Z0Z0O0Z0 PO0Z0O0O Z0Z0Z0J0 a
Opening up a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrl0snZ Z0Z0abj0 0Z0Z0o0o opZ0oPZ0 0m0oPZPM ZPoPZ0J0 PZPAQMBS Z0Z0Z0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
505 8 7 6 5 4 3 2 1
508
rZ0Z0snl Z0ZbZ0j0 0o0ZpZpZ oPZpOpMp 0Z0Z0O0L Z0OBZ0ZR 0O0Z0ZPO Z0Z0Z0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0Zrj Z0obZ0Z0 no0o0l0Z o0ZPo0mp 0ZPZPo0Z OPLNZPZ0 0Z0ZBM0O S0Z0Z0SK a
506 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
510
0Zks0a0s oplbZ0o0 0ZnZpZ0o Z0ZpOpZ0 0Z0O0L0O Z0MBZNZ0 PO0Z0OPZ S0Z0ZRJ0 a
c
rZ0l0s0j Z0ona0op pZnobo0Z ZpZNo0Z0 0Z0OPZ0Z Z0O0ZNZP POBZ0OPZ S0AQS0J0
507 8
b
509
rZ0s0ZkZ ZbZ0lpap pZpo0mpZ ZpZ0m0Z0 0OPAPZ0Z O0M0ZNZ0 0ZQZ0OPO Z0ZRSBJ0 a
Opening up a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0l0skZ opZ0o0ap 0Z0o0ZpZ Z0oPZ0Z0 0mPZpZ0Z ZPM0Z0Ob PZ0LPONO S0A0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
511 8 7 6 5 4 3 2 1
514
rZ0ZkZ0s opo0Zpop 0Z0Z0Z0Z Z0apORl0 0Z0Z0ZPZ ZBZpZ0O0 POPO0ZPZ SNAQZ0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZbZ0skZ opl0m0op 0Z0ZpZ0Z Z0opOpZ0 0ZnO0Z0Z O0OBZNZQ 0ZPA0OPO S0Z0J0S0 a
512 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
516
rZbZ0j0s o0ZnZpo0 0l0ZpZ0Z Z0opO0A0 0a0M0L0O Z0M0Z0Z0 POPZ0O0Z S0Z0J0S0 a
c
0ZrZ0Z0j o0s0Z0Z0 0o0ZpZ0o mPZpOpZq 0Z0L0OpZ ZPZBZ0O0 RZPZ0ZKO S0Z0Z0Z0
513 8
b
515
0ZbmrZkZ Z0Z0Zpop pZ0Z0Z0Z Z0o0l0Z0 0Z0ZBZ0Z S0Z0Z0Z0 0O0ZQOPO Z0A0Z0J0 a
Opening up a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrs0ZkZ opZblpop 0ZnZ0m0Z Z0o0o0M0 0ZPZ0Z0Z OPA0O0Z0 0ZQZBOPO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
517 8 7 6 5 4 3 2 1
520
rmbZ0ZkZ ZpZ0ZpOp pZ0ZpZ0L Z0Z0l0Z0 0a0s0Z0Z ZRM0Z0Z0 PZPZBZPO Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0jqs0ZrZ opo0Z0Z0 0Zna0o0Z ZQZNZ0ob PZ0O0Z0Z ZRM0O0Z0 0Z0Z0OPZ Z0Z0ZRZK a
518 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
522
0ZrlnskZ opZba0op 0ZnZpZ0Z Z0ZpMpZ0 0Z0O0A0Z Z0MBO0ZQ PO0Z0OPO S0Z0ZRJ0 a
c
bZrZ0skZ o0l0Zpop PopZnZ0Z Z0ZnM0Z0 0ZBONZQZ S0Z0Z0Z0 0O0Z0OPO Z0Z0ZRJ0
519 8
b
521
0sbZkZrZ Zpl0Zpo0 pZ0ZpZ0o Z0m0O0Z0 0Z0M0Z0L Z0Z0Z0Z0 POPZBZPO Z0JRZRZ0 a
Opening up a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0skZ S0Z0L0Zp 0ZpZ0ZrZ Z0ZpZ0aq 0Z0O0ZpZ Z0ZPZ0Z0 PZRZ0OBZ Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
523 8 7 6 5 4 3 2 1
526
rZ0ZqZ0s Z0o0j0o0 pZ0Z0ZpZ ZpZ0MbZ0 0O0ZnA0Z O0Z0Z0Z0 0ZPMQaPO S0ZRZ0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZbZ0skZ opZnZpop 0Z0ZpZ0Z l0ZNZ0a0 0o0O0Z0O Z0Z0ONZ0 PZQZ0OPZ S0Z0JBZR a
524 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
528
0Z0Z0a0Z opZ0s0ok 0Zpo0oRo Z0Z0sPZN 0ZPZPZ0Z ZPZ0Z0L0 PZ0l0ZPO Z0Z0ZRZK a
c
rZ0Zka0s Zpo0Z0o0 pZ0Zbo0o Z0Z0ZqZ0 0Z0LNZ0Z ZPZ0Z0Z0 PAPZ0ZPZ Z0ZRS0J0
525 8
b
527
0ZkZ0Z0s opZ0Zpop 0ZpZ0m0Z Z0Z0ZPAb PZ0ZPZ0Z Z0MrZ0ZP 0OBZ0aPZ S0Z0S0ZK a
Opening up a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0j0Z Zpo0sPop 0a0s0Z0Z oPZpZ0l0 PZ0O0M0Z L0Z0ORZ0 0ZRZ0ZPO Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
529 8 7 6 5 4 3 2 1
532
rZ0ZnskZ o0Z0Z0Z0 0o0ZpZpL m0o0lpZ0 0Z0Z0Z0A O0O0Z0ZR 0Z0ZNOPO Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0lkZ0s ZbZnapo0 pZ0opZ0Z ZpZ0Z0Zn PO0MPO0o Z0MBZQZ0 0ZPA0ZPO S0Z0ZRZK a
530 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
534
0ZkZ0Z0s Zbl0ZpZ0 pZ0MpapZ ZpZ0Z0Z0 0Z0Z0Ons ZNZ0Z0Z0 POPZQZPO Z0ZRZRAK a
c
rZ0l0Z0j opZ0M0op 0Zpo0Z0Z Z0Z0Z0ZP 0ZBZ0sPZ Z0Z0Z0Z0 POKZQa0Z Z0Z0Z0ZR
531 8
b
533
ka0s0ZrZ opZ0ZRo0 0Zpl0Z0o O0Z0o0Z0 0ZBZPZ0Z Z0OPZ0On 0OKZ0L0Z S0Z0Z0A0 a
Opening up a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0Z0skZ opZqZ0Zp 0Z0Z0ZpZ Z0Zpo0Z0 0Z0Z0ZPZ Z0ZBOPZQ POPJ0Z0Z S0Z0Z0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
535 8 7 6 5 4 3 2 1
538
rZ0Z0s0Z Z0o0ZpZk 0o0o0Zpo ZPmPo0l0 pZPZPZPZ O0Z0MPS0 0Z0L0Z0O Z0Z0S0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0Z0Z Z0Z0Z0j0 0O0o0ZpZ Z0ZPonZ0 0Z0l0Z0Z Z0Z0Z0Z0 0Z0Z0ZPO sRZ0LBZK a
536 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
540
0Z0mbZ0j ZpZ0M0a0 0Z0ZpZPZ Z0ZpO0ZP pZrO0S0Z Z0Z0ZpJ0 PZ0Z0Z0Z ZRZ0Z0Z0 a
c
0Z0Z0s0Z Z0Z0Z0lk 0Z0Z0s0o Z0Z0ZbZP PO0L0S0S Z0Z0Z0Z0 0Z0Z0JPZ Z0Z0Z0Z0
537 8
b
539
rZ0ZqZrj opZ0abZp 0m0m0ZpZ Z0ZpMpZ0 pO0O0O0Z O0Z0M0ZQ 0Z0Z0ZRO ZBA0Z0SK a
Opening up a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZqZ o0ZrZpZk 0o0ZpSpZ Z0o0O0Sp 0Z0s0Z0O O0Z0Z0L0 0O0Z0OPZ Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
541 8 7 6 5 4 3 2 1
544
rZbZ0ZkZ ZpZ0spop 0ZnZ0Z0Z o0m0Z0Z0 0ZPo0S0Z OPZPZ0O0 0Z0M0ZBO S0Z0M0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0s0ZkZ o0Z0Z0lp 0ZpZpZ0Z Z0O0ZpZ0 PZ0OpOpZ Z0Z0O0O0 0S0L0Z0O ZRZ0Z0J0 a
542 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
546
0Z0s0ZkZ Z0o0Zpo0 0ZnZ0ZqZ o0A0o0Zn QZ0ZPZ0Z ZPO0ZPO0 0Z0Z0J0Z Z0SrSNZ0 a
c
rZ0Z0skZ o0ZbZ0Zp Bl0o0ZpZ Z0ZPZpZ0 0O0ZpZ0Z Z0Z0O0OP QZ0Z0O0Z S0S0Z0J0
543 8
b
545
0ZbZqs0Z Z0m0j0Z0 rZpZpZpo MpOpOpZ0 0O0O0Z0Z S0ZBZPO0 RJ0Z0Z0O L0Z0Z0Z0 a
Open line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0ZkZ l0Z0Zpap 0o0ZbZpZ ZnZpo0Z0 0O0Z0Z0Z Z0ZPM0O0 0Z0APOBO ZQZ0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
547 8 7 6 5 4 3 2 1
550
rZ0s0ZkZ mpZ0lpop pZpZ0Z0Z Z0ZPo0Z0 0a0ZNZ0Z ZPZ0O0ZP PA0ZQOPZ Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZkZrZ0s opoqZ0Z0 0Zna0opZ Z0ZpZnZ0 0Z0O0O0o Z0OQZ0ZP PO0ANZPM Z0JRZRZ0 a
548 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
552
0ZRarZkZ ZpZ0ZpZp pZ0Z0Z0Z Z0ZpZqo0 0Z0ZnM0Z ZPZ0O0O0 PA0Z0O0O Z0L0Z0J0 a
c
0sbZrZkZ opo0Zpap 0m0Z0ZpZ M0Z0o0Z0 0Z0Z0Z0Z ZPZ0Z0OP PAPZPOBZ Z0JRZ0ZR
549 8
b
551
nZrZ0akZ ZqsbZ0m0 pZNo0ZpZ ZpZPopZp 0O0ZPZ0O O0M0APOB 0ZRZ0L0J Z0S0Z0Z0 a
Open line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZrl0akZ ZnZbZpZp 0Z0o0mpZ ZpZPo0Z0 0OpZPZ0Z Z0O0ANMP RZ0L0OPZ ZBZ0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
553 8 7 6 5 4 3 2 1
556
rZbZ0skZ opZ0lpop 0m0ZpZ0Z Z0Z0M0Z0 0Z0Z0Z0Z Z0Z0Z0O0 PO0LPOBO Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0s0ZnskZ ZpZ0Z0o0 0mpZ0o0o Z0l0oNZ0 0ZPZPZ0Z ZPZRZ0OB 0L0Z0O0O Z0ZRZ0J0 a
554 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
558
rZ0akZ0s o0Z0Z0op 0ZpZpo0Z Z0ZpZ0ZP 0Z0O0APZ Z0O0OPZ0 PZKZ0Z0Z S0Z0Z0ZR a
c
bsqZ0skZ S0Znm0a0 0opZ0Zpo ZPZ0opZ0 0ZPo0Z0Z ZNZPZNO0 0ZQAPOBO S0Z0Z0J0
555 8
b
557
0Z0Z0Zrs ZplbZnjp pZpZpZpZ Z0OpZpOP PO0O0O0Z L0ZBONZ0 0Z0Z0J0S Z0Z0Z0ZR a
Open line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
bmrl0Z0j Z0s0ZpZp 0ZpZ0ZpL opZBZ0Z0 0Z0O0ZNZ Z0Z0Z0O0 PO0Z0O0O Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
559 8 7 6 5 4 3 2 1
562
rZ0Zbs0j opZnl0op 0ZpZ0Z0Z Z0Z0OpZ0 0ZQZ0Z0Z ZPM0ZPO0 PZ0Z0ZBO S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0s0ZrZkZ o0Z0Zpap 0Z0Z0ZpZ l0o0Z0Z0 0ZPoNZ0Z ZPZRZQZP PZ0Z0OPZ S0Z0Z0J0 a
560 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
564
0ZnZrsnZ opZ0Z0jp 0ZpZpZpZ L0Z0O0Z0 0Z0Z0l0Z ZBZ0Z0M0 PO0Z0OPO Z0S0ZRJ0 a
c
0s0s0ZkZ o0Z0ZpZp 0Z0Z0ZpZ Z0o0Z0Z0 0l0ZpZ0Z Z0ObO0O0 PZ0S0OBO S0Z0L0J0
561 8
b
563
0Z0l0skZ ZpZ0opZ0 0O0o0apZ Z0mPZ0Z0 pZPZ0ZBZ O0Z0A0O0 0Z0Z0OKZ ZQZ0Z0ZR a
Open line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0skZ opZ0l0op 0ZbZ0ZnZ Z0o0ZpZ0 0Z0ZnZ0Z Z0O0ONZP PZQZBOPA Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
565 8 7 6 5 4 3 2 1
568
0ZnsqskZ ZpobZpa0 pZ0Z0Zpo Z0Z0o0Z0 0Z0ZPZ0Z Z0O0MNO0 POBZQOPZ S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZrZ0ZkZ o0s0Zpap 0o0ZpZpZ Z0o0O0Z0 0Z0mBOPZ Z0Z0A0ZP POPZ0SKZ Z0ZRZ0Z0 a
566 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
570
rZbl0s0j o0Z0ZnZp 0Z0o0mpa Z0oPopZ0 0ZPZPZ0Z O0M0ZPZ0 0ZQMBAPO ZRZ0ZRJ0 a
c
0Z0lkZ0s ZrZnapop 0Z0Zpm0Z Zpo0Z0Z0 0Z0Z0A0Z Z0MPZ0O0 0OQZPONO S0Z0ZRJ0
567 8
b
569
0Z0s0akZ opl0Z0op 0ZpZ0o0Z Z0Z0oNZ0 PO0ZPm0Z Z0O0Z0Z0 0AQZ0OPO S0Z0Z0J0 a
Open line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0ZkZ opZ0lpop 0ZpZbm0Z Z0Z0Z0Z0 0Z0SPZ0Z Z0M0ZPZ0 POBZ0LPO Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
571 8 7 6 5 4 3 2 1
574
rZ0l0mkZ Zbo0Zpop 0o0o0a0Z Z0ZPo0Z0 0OPZPZ0Z Z0A0Z0OB 0L0M0O0O Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0lkZ0s Z0Z0Zpo0 0Z0Z0m0Z o0apM0A0 Po0m0ZpZ ZBZPZ0Z0 NOPZ0OPZ S0Z0LRJ0 a
572 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
576
0sbl0s0j Z0Z0apmp 0Z0o0mpA ZpoPo0Z0 0Z0ZPZ0Z ZPO0MNZP 0ZBZQOPZ S0Z0S0J0 a
c
rZrZ0akZ Z0l0ZpZp pm0Z0ZpZ M0ZbZ0Z0 0Z0OpZ0Z Z0Z0O0Z0 0A0ZBOPO SQZ0ZRJ0
573 8
b
575
0ZrZ0skZ opZqZpop 0Z0Z0Z0Z Z0onZbZQ 0Z0oNZ0Z Z0ZPZ0O0 POPZROBO Z0Z0S0J0 a
Open line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0abZ ZpZ0Z0o0 0jpZ0ZPo ZqZ0oNZP 0Z0oPZ0Z ZPZPZRZ0 PZ0Z0Z0Z ZKAQZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
577 8 7 6 5 4 3 2 1
580
rZblkZ0s ZpZ0apZ0 pZnopZ0Z Z0Z0m0o0 0Z0MPZPZ Z0M0A0Z0 POPLBO0Z Z0JRZ0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Zns0j o0Z0Z0ap 0ZNo0Z0m Z0oPo0l0 0ZPZPobZ Z0Z0Z0Z0 PZ0ABZPO ZRZ0LRJN a
578 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
582
rZbl0akZ o0Z0mrZ0 0Z0o0m0Z Z0oPo0op QZPZPo0Z Z0M0ZPZP PS0ABMPZ Z0Z0ZRJ0 a
c
rZbl0s0j Z0Z0m0ap 0Z0o0ZpZ o0oPopZ0 0ZPZPZ0Z O0M0ZPZ0 0Z0ZBZPO ZRAQZRJ0
579 8
b
581
0Z0s0skZ Z0o0lpo0 poPZpZ0o Z0ZnM0Z0 0Z0Z0Z0Z Z0Z0Z0O0 POQZPOKO Z0SRZ0Z0 a
Open line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0Znj o0Z0l0Zp 0ZRo0Z0Z Z0ZPo0o0 0Z0ZPo0Z Z0ZBZPZP PZ0L0ZPZ Z0S0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
583 8 7 6 5 4 3 2 1
586
rZ0Z0Z0s Z0o0lnj0 bo0o0opa o0ZPo0Z0 0ZPZPZPA ZPM0ZPZ0 PZ0Z0Z0Z Z0MRJQZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0m0Z0Z0s o0ZkapZ0 bo0ZpZ0l m0ZpO0Z0 0Z0O0Z0Z OPZ0ZNOr 0A0Z0ORM SBZQZ0ZK a
584 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
588
rZbZ0skZ Zpl0Z0Zp pZnapZ0o Z0ZpZ0Z0 0Z0O0Z0Z Z0MBZNZP PO0ZQOPZ Z0ZRZRJ0 a
c
0Z0Z0s0Z Z0jqZ0o0 0o0Zro0o o0ZpO0Z0 0Z0O0ZQZ Z0Z0Z0ZP PO0Z0SPZ Z0Z0ZRJ0
585 8
b
587
0Z0Z0ZkZ ZqZ0s0o0 pZ0oPo0o Z0Z0ZPZQ 0s0ZPZ0Z ZPZ0Z0ZR 0Z0Z0J0O S0Z0Z0Z0 a
Open line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0m0s0j o0ZqZ0Zp 0Z0O0a0Z ZpoQspMP 0Z0ZpZ0Z Z0O0M0Z0 PO0Z0ORZ ZKZ0Z0S0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
589 8 7 6 5 4 3 2 1
592
0Zks0Z0s Zpo0Zna0 pZpZ0lbZ Z0Z0o0o0 0Z0ZPZPZ ZPZ0MPZ0 PAPMQZ0Z S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0s0skZ opZ0Zqop 0Z0Z0Z0Z Z0apZpZ0 0ZnZ0A0Z Z0OQZPOP PO0ZRZBJ Z0Z0S0Z0 a
590 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
594
bZ0s0skZ Z0Z0l0Zp pZ0Z0opZ ZponZ0Z0 0Z0ZNZ0L ZBOPZ0O0 PO0Z0O0O S0Z0S0J0 a
c
rZ0lrZkZ Z0Z0Zpo0 pZ0abZ0o Zpo0Z0ZQ 0Z0ZPZ0Z O0M0A0ZP 0O0Z0OPZ S0Z0S0J0
591 8
b
593
0ZqZrakZ Z0Z0ZpZ0 0ZrZpZpo opo0O0Z0 0Z0Z0O0Z Z0O0AQO0 PO0S0Z0O Z0Z0S0J0 a
Open line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0j0Z Z0Z0Zpo0 0Z0ZpZ0o ZpZpO0Z0 0O0O0Z0O l0Z0Z0O0 0ZRZ0OKZ ZQZRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
595 8 7 6 5 4 3 2 1
598
0Z0Z0s0j ZpZbZpZp pZ0opa0Z Z0Z0ZPZB 0l0Z0Z0Z ZPs0Z0S0 0ZPL0ZPO Z0Z0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZrZkZ ZrZ0Z0Zp qZ0o0OpZ ZNZPZ0On 0o0ZPZ0Z ZPoQZ0Z0 PZ0Z0ZRZ Z0Z0ZRZK a
596 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
600
0Z0ZrskZ Z0l0Z0op pZbZ0ZPZ ZpZ0o0Z0 0a0ZPZBZ Z0M0Z0Z0 POPL0Z0Z ZKZRZ0S0 a
c
0ZrZ0ZkZ Z0Z0Z0Zp 0Z0Z0Zpa Z0ZpA0Z0 pZ0O0Z0Z O0Z0ZROq 0Z0ZQO0O Z0Z0Z0J0
597 8
b
599
rZ0ZrZkZ Z0o0Z0Z0 0oNZ0ZbZ oQZ0Zpl0 0ZPOpZRZ O0O0O0m0 0Z0Z0ZPZ Z0ZBS0J0 a
Closing a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ ZbZ0ZpZ0 0Z0o0SpZ Z0Z0Z0Lp 0Z0M0Z0Z Z0Z0o0Z0 pZ0Z0ZPO SqZ0A0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
601 8 7 6 5 4 3 2 1
604
0L0ZbZ0Z o0Z0Z0lk 0ZpZpZ0o Z0OpZpZ0 0Z0O0Ona O0ZNZBZN 0Z0ZPZ0O Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0skZ Z0Z0ZpZp pZ0o0Z0Z Z0Z0a0OQ 0ZPZ0Z0S Z0ZqZ0Z0 0Z0s0ZBO Z0Z0ZRZK a
602 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
606
rZ0Z0ZkZ lpZ0ZpZp 0Zpo0ZpZ o0Z0Z0Z0 NZPZrZbZ ZPZ0SPO0 0O0L0ZPZ Z0ZRZ0J0 a
c
0ZbZqs0j Zpo0Z0ap nZ0Z0Z0A o0oPZ0Z0 0ZPZpZBM OrZ0Z0ZP 0O0L0O0Z ZRZ0J0S0
603 8
b
605
rZ0l0skZ ZpZ0Z0ap 0Z0o0ZpZ Z0Z0onZn 0ZPZ0Z0Z ONM0ZQO0 0Z0Z0O0O ZRA0ZRJ0 a
Closing a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0s0j Z0l0Zpap 0ZNobZ0Z o0Z0o0Z0 RZ0Z0Z0Z Z0O0ZBZ0 0O0Z0OPO Z0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
607 8 7 6 5 4 3 2 1
610
0Z0Z0skZ o0o0mpo0 0ZqZpZ0s ZpZ0ZPZ0 0Z0O0Z0Z O0O0M0Z0 0O0Z0ZQO Z0JRS0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0sbZkZrZ ZpZnapZ0 pZ0opm0o l0Z0Z0O0 0Z0MPZ0A Z0M0Z0L0 POPZBZPO Z0JRZRZ0 a
608 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
612
rZ0lrZkZ opZ0ZpZp 0Z0Z0ZpZ m0ZPL0Z0 bZ0M0Z0Z Z0Z0Z0O0 PO0Z0OBO S0A0Z0J0 a
c
rZ0ZrZnj opZ0Z0o0 0Zqa0o0o Z0o0ZPZ0 0Z0ZPZQM ZPO0A0ZR 0Z0Z0ZPO Z0ZRZ0J0
609 8
b
611
0Z0Z0Z0s Z0j0Z0op pZbZpZ0Z Zpa0lpZ0 0ZRZPZ0Z Z0M0Z0Z0 POPZQZPO ZKZ0Z0ZR a
Closing a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZnZrZ Zpl0Zpok 0o0ZpZ0o ZbZ0M0ZN 0Z0Z0Z0Z Z0Z0Z0L0 POPZ0O0O ZKZRZ0S0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
613 8 7 6 5 4 3 2 1
616
kZns0Z0Z ZpZrZ0o0 pZpZpZ0Z O0A0ZpZ0 BLPObZ0o Z0Z0S0ZP 0S0Z0OPJ Z0l0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0Z0Z Z0Z0O0j0 0Z0Z0ZPZ ZpZ0Z0Z0 pA0O0a0l O0Z0ZrZP 0Z0Z0ZPZ Z0Z0S0LK a
614 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
618
0Z0Z0ZkZ Z0Z0Z0o0 0ZNo0Zqo ZPZPZ0Z0 0Z0Z0o0m Z0Zbs0Z0 PL0Z0ZPO Z0S0M0ZK a
c
0Z0Z0Z0j Z0Z0Zpsp 0Z0Z0ZqZ o0ZpO0Z0 PZ0O0Z0a Z0Z0A0ZQ 0Z0Z0Z0O Z0Z0ZRZK
615 8
b
617
rZ0Z0aks opoqZ0op 0ZnZRZ0Z Z0Z0Z0M0 0Zpo0ZPZ Z0Z0ZQZ0 POPZ0O0O S0A0Z0J0 a
Closing a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0Z0Z opZ0Z0a0 0Z0Z0Z0Z Z0Z0m0Zp 0Z0ZNo0Z Z0O0ZPZp PO0ZKO0Z S0A0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
619 8 7 6 5 4 3 2 1
622
rZ0Z0Z0j opZ0lpop 0Z0S0m0Z Z0Z0s0Z0 0ZBZ0L0Z Z0M0Z0Z0 PObS0ZPO Z0Z0Z0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZrZ0j opZ0m0o0 0a0o0o0Z Z0oqZ0Z0 0Z0ZNZQZ Z0Z0Z0ZP 0Z0A0ZPZ Z0Z0S0ZK a
620 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
624
0Z0Z0Z0Z Z0o0Z0ok 0Z0orZ0o ZPZ0ZpZ0 0ZPL0O0Z Z0S0Z0ZP 0l0m0APJ Z0Z0Z0Z0 a
c
0ZrZkZ0s opZbZpop 0Z0Z0Z0Z Z0lpO0Z0 0Z0Z0ZnZ Z0MBZ0Z0 PO0Z0OPO ZRZQS0J0
621 8
b
623
0Z0Z0ZkZ Z0oqZ0op 0ZnZ0o0Z oQZ0o0Z0 PZ0ZRZ0Z Z0O0ZNO0 0O0Z0OKO Z0ZrZ0Z0 a
Closing a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Z0Z Z0Z0mQak 0Z0M0Zpo ZpZ0Z0Z0 0O0Z0Z0Z Z0Z0Z0A0 0OqZrOPO Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
625 8 7 6 5 4 3 2 1
628
0s0Z0skZ Z0Z0ZpZ0 0Zpo0LpZ Z0Z0Z0Zq NZPZPZbZ Z0ZPZ0Op PZPZ0Z0O ZRZ0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0s0Z0Z0j Z0l0ZpZp pZ0o0Z0A Z0Z0ZPL0 nZpZ0Z0Z Z0a0Z0ZP PsBZ0ZPZ Z0S0S0J0 a
626 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
630
0Z0Z0Z0j o0ZRZ0Z0 0ZpZ0o0O Z0Z0ZKZ0 0OPZ0Z0Z Z0Z0Z0Z0 rZ0A0Zpa Z0Z0Z0Z0 a
c
rZ0a0s0j opoqZ0on 0ZnobZQZ Z0ZNZNZp 0ZBZPO0O Z0Z0Z0Z0 POPZ0Z0Z Z0J0Z0SR
627 8
b
629
0ZrZ0ZkZ Z0Z0Zpo0 bZ0MpZ0o Z0Z0Z0Z0 0Z0L0Z0Z ZPZ0O0Z0 PZ0ZqOPO Z0ZRZ0J0 a
Closing a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0l0Z0Z Z0ZbZBok 0s0a0ZNo Z0Z0ZpZP 0o0Z0O0Z ZQZ0Z0O0 0Z0Z0O0Z Z0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
631 8 7 6 5 4 3 2 1
634
0ZrZ0Z0Z ZpZ0Z0ok pA0Z0oqZ Z0Z0o0Z0 0Z0o0Z0Z L0Z0Z0Ob PO0ZPO0O Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Zks0ZrZ obo0Z0Zp 0o0Z0ZpZ ZNlpMpZ0 0Z0ZnL0Z Z0Z0Z0Z0 POPS0OPO Z0J0S0Z0 a
632 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
636
rZ0Z0Z0s o0ZRakZp 0ZpZ0o0Z l0Z0Z0Zb 0Z0Z0Z0Z Z0M0ZNZP PZPO0OPZ Z0AQZ0J0 a
c
0ZbZrmkZ s0l0Zpop 0Z0Zpa0Z Z0o0M0ZQ 0ZPZBZ0Z ZPZ0Z0Z0 0A0Z0Z0Z Z0ZRZRJ0
633 8
b
635
rmbZ0skZ opZ0apop 0ZpZ0Z0Z l0Z0Z0Z0 0Z0ZNM0Z Z0Z0A0LP POPZ0ZPZ Z0JRZ0ZR a
Closing a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZ0j opl0sRZp 0Z0Z0ZpZ Z0o0a0L0 0ZBmpA0Z Z0Z0Z0ZP PO0S0ZPZ Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
637 8 7 6 5 4 3 2 1
640
0Z0ZBs0j o0Z0ZrZ0 0o0o0ZqZ Z0oPZ0Zp 0ZPZRapZ Z0Z0Z0Zn PO0ZQZ0O Z0A0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0Z0Z o0Z0ZQo0 bo0ZpZ0j Z0Z0S0aP 0Z0Z0ZPZ Z0Z0Z0Z0 POqZ0Z0Z J0Z0Z0S0 a
638 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
642
0srZ0ZkZ ZpZblpap 0S0o0ZpZ oNZPZ0Z0 PZ0ZPZnZ ZQZ0Z0Z0 0Z0MBZPO Z0A0S0J0 a
c
0ZbZqs0j Z0Z0Z0Zp pZpS0ZpZ ZpO0o0L0 0Z0ZPZ0Z ZBZ0Z0Z0 PO0Z0ZPO Z0Z0Z0J0
639 8
b
641
0Z0Z0skZ Z0Z0Zpo0 0Z0a0Z0Z Zpo0ZqA0 0Z0ZRZ0L ZBOnZ0Z0 0O0Z0OPO Z0Z0Z0J0 a
Closing a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0Z0j Z0Z0LpZp pZ0ZpZ0Z ZpS0Z0ZP 0Z0lbZ0Z O0Z0Z0S0 0O0Z0OPZ Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
643 8 7 6 5 4 3 2 1
646
0Z0s0ZkZ spZbZ0o0 0ZpS0aPZ o0O0ZpZ0 0ZqZ0Z0Z O0Z0O0O0 0Z0Z0OBZ Z0ZQZ0JR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZbLrZkZ o0Z0Zpop 0ZpZ0Z0Z Z0Z0Z0Z0 0APZqZ0Z O0Z0Z0ZP 0ZPZ0OPZ Z0ZRZ0J0 a
644 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
648
bZRZ0mkZ Z0Z0Zpop 0o0Z0m0Z Z0Z0ZNZ0 0a0ZpZ0Z ZPZ0APZ0 qZ0ZBLPO Z0Z0Z0J0 a
c
0Z0Z0skZ ZrZqa0op pZ0Zbo0Z Z0onA0Z0 Po0Z0Z0Z Z0ZPZQMP BOPZ0ZPZ S0Z0S0ZK
645 8
b
647
0ZbZ0s0Z Zpm0Z0ok rZ0Z0Z0Z o0Z0M0Z0 0ZQZ0o0M Z0Z0Z0ZR Pl0Z0ZPO Z0Z0S0ZK a
Closing a line
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbs0ZkZ Z0l0apop pZpZpm0Z Z0Z0S0Z0 0Z0Z0A0Z Z0M0Z0O0 POPZ0OBO S0ZQZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
649 8 7 6 5 4 3 2 1
652
rZ0Z0Zks opZ0Zpa0 nZ0Z0l0o Z0oPZ0Z0 0Z0m0ZpZ Z0MQZ0A0 PO0S0OPO Z0J0Z0MR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZrZ0s0j o0l0Zpop 0onZpa0Z Z0ZnM0Zb 0O0O0Z0Z O0Z0ZNZP 0L0ZBOPZ Z0ARZRJ0 a
650 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
654
rZ0ZrZ0j ZNZnZ0op pZpZ0Z0Z Z0Z0Z0Z0 0O0ZPl0Z O0ZPZPZ0 0L0Z0ZKO Z0S0ZRZ0 a
c
0Z0Z0Zrj o0Z0lpsp 0o0o0m0Z Z0oPoPon 0ZPZ0Z0Z O0ZBZPO0 0O0LNS0O Z0Z0S0ZK
651 8
b
653
0s0l0s0j Z0ZbZpo0 pZ0M0m0o ZpZ0Z0Z0 0L0Z0Z0A O0Z0ZPZ0 0Z0Z0ZPO Z0ZRZRJ0 a
Pin
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZkZ Z0Z0ZpZp pZ0Z0o0Z Z0s0Z0Z0 0Zbs0Z0Z Z0Z0ZBZ0 PZ0Z0OPO Z0S0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
655 8 7 6 5 4 3 2 1
658
0Z0ZrmkZ opZ0Z0ZN 0Z0ZbZpL Z0oqZ0Z0 0Z0Z0Z0Z Z0Z0S0ZP PO0Z0ZPZ Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZRZnZkZ ZrZ0l0op 0o0ZpZ0Z oPZbApZ0 0Z0Z0Z0Z Z0Z0L0OP 0Z0ZPOBZ Z0Z0Z0J0 a
656 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
660
0s0s0mkZ ZbaqZpop po0Z0m0Z Z0o0oNZ0 PZ0ZPZ0Z S0ZPZNO0 0O0A0OBO Z0SQZ0J0 a
c
0ZkZ0Zns Z0o0Zpop 0o0Z0Z0Z Z0ZrZ0Z0 0ZpZ0Z0Z Z0O0A0O0 PS0Z0O0O ZRZ0Z0J0
657 8
b
659
0Z0Zks0Z o0ZqZpZp 0Z0ZpZ0Z ZrZ0m0ZQ 0Z0oBZ0Z Z0Z0Z0Z0 PZ0Z0OPO Z0S0ZRJ0 a
Pin
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0ZqZkZ o0s0m0o0 PonZpZ0o ZBZpOpZ0 0O0O0O0Z Z0Z0LNZ0 0ZRZ0ZPO Z0S0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
661 8 7 6 5 4 3 2 1
664
0Zks0s0Z o0Z0Z0Zp 0Z0Z0OpZ Z0oPZ0Z0 0lpZ0L0O Z0Z0Z0ZR PO0Z0Z0Z ZKS0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZrZks0Z oRZ0Z0Zp 0ZqZ0Z0Z Z0ZpZ0Z0 QZ0ZbO0Z Z0Z0Z0Z0 PO0Z0ZPO Z0Z0S0J0 a
662 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
666
ra0Z0Zrj o0Z0ZpZp 0l0Z0o0A Z0S0ZNZ0 0Z0obZ0L O0Z0Z0O0 0O0Z0O0O Z0Z0Z0J0 a
c
rZ0s0Z0Z ZbZ0Zpj0 0Z0Z0lpZ oPZpZ0Zp 0ZpM0Z0O Z0ZnO0O0 PLRZ0OBZ Z0ZRZ0J0
663 8
b
665
rZ0lnskZ opZ0L0mp 0Z0o0ZpA Z0oPZpM0 0ZPZ0Z0Z Z0ORZ0Z0 PZ0Z0OPO Z0Z0S0J0 a
Pin
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Z0Z o0Z0Spj0 0Z0o0mpo ZrlPZ0Z0 0Z0Z0O0Z ZPZ0Z0OP PL0Z0ZBJ Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
667 8 7 6 5 4 3 2 1
670
0Z0Z0j0Z Z0Z0Z0o0 pZ0l0Z0o a0Z0Z0Z0 0ZQA0Z0Z Z0Z0Z0ZP PZ0Z0ZPZ Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Zrl0skZ o0mba0op 0ZnZ0Z0Z ZpO0ZpZ0 0Z0Z0Z0M ZPM0Z0O0 PA0Z0OBO Z0SQZRJ0 a
668 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
672
rZ0l0skZ o0ZnZpop Bo0ZpZ0Z Z0ZbM0Z0 0Z0O0Z0Z Z0Z0Z0Z0 PO0L0OPO S0Z0ZRJ0 a
c
0s0l0ZkZ S0Z0ZpZ0 0Z0ObZ0o Z0Z0L0o0 0o0ZBZ0Z Z0o0Z0OP 0O0Z0O0Z Z0Z0Z0J0
669 8
b
671
0ZrZ0ZkZ ZpsqZpop 0m0o0Z0Z ZPZ0o0Z0 0ZPZ0Z0Z ZQZ0O0Z0 0ZRM0OPO Z0Z0ZRJ0 a
Pin
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Z0Z Z0Z0Zpj0 0aRZ0ZpZ Z0Z0Z0Zp 0Z0Z0O0O Z0ZQZNO0 0Z0Z0J0Z ZrZ0Z0Zq a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
673 8 7 6 5 4 3 2 1
676
rZ0Z0j0Z Z0ZnZqop pZ0Z0o0Z Zpa0oNZ0 0Z0ZPZQZ ZPZ0Z0ZP 0O0A0OPZ Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZbl0skZ ZpZ0Zpap pZ0Z0ZpZ Z0ZnZ0Z0 0Z0M0Z0Z Z0Z0A0Z0 PO0LBOPO S0ZRZ0J0 a
674 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
678
qZrZrakZ ZbZ0Zpop po0ZpmnZ Z0ZpZ0Z0 0ZPMPZ0Z ZPM0L0OP PA0ZROBZ Z0Z0S0ZK a
c
rZblks0Z opopapLp 0Z0Z0Z0Z Z0Z0ZnZ0 PZ0Z0Z0Z Z0M0Z0Z0 0OPO0OPO S0A0S0J0
675 8
b
677
rmbZ0s0j opZ0o0Zp 0Zpo0ZpZ l0ZPZpZ0 0Z0Z0Z0Z ZPa0ZNO0 PA0ZPOBO S0ZQZRJ0 a
Pin
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ opZ0ZpZp 0ZnZ0apZ Z0ZpZ0M0 0Z0Z0Z0O ZPZ0O0Z0 PAQZBOPZ Z0ZRZKZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
679 8 7 6 5 4 3 2 1
682
0Z0Z0Zrj o0Z0ZqZ0 0Z0Z0Z0o Z0Zbo0Z0 0Z0Z0o0Z ZNZ0Z0Z0 PO0LPZRO Z0Z0Z0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZrZ0s0j o0ZbaPop 0Z0o0m0Z l0ZBZ0Z0 0o0APZ0Z Z0Z0Z0Z0 POPZQO0O Z0JRZ0S0 a
680 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
684
0s0l0s0j Z0Z0aPop pZbo0m0Z Z0Z0Z0S0 0Z0APZPZ ZBO0L0ZP PZPZ0Z0Z S0Z0Z0J0 a
c
0Z0s0Z0Z Z0snlpj0 pZ0Z0Z0o ZpoBo0oP 0ZPZPZ0Z ZPZRL0Z0 PZ0Z0OPZ Z0ZRZ0J0
681 8
b
683
0Z0srZkZ opZ0Z0op 0Z0ZqZ0Z Z0opo0L0 0ZpZ0Z0Z Z0Z0Z0O0 PO0Z0OBO Z0ZRS0J0 a
Pin
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0srZkZ o0Z0apo0 boqZ0Z0o ZNZnZ0M0 PZ0Z0Z0Z ZQZ0A0O0 0O0Z0OBO S0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
685 8 7 6 5 4 3 2 1
688
rZ0lrZ0Z obZ0Zpj0 0opZnapo Z0Z0M0Z0 0ZBONZ0Z ZQZ0Z0Z0 PO0Z0OPO Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0l0skZ o0ZbZpop 0opM0ZnZ Z0Z0Z0Z0 0Z0ZQO0Z ZBZ0O0ZP PO0Z0ZPZ Z0ZRZ0J0 a
686 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
690
rZbZ0ZkZ o0Z0l0o0 0o0ZpZ0o Z0ZpMrZ0 0Z0O0Z0Z Z0Z0Z0Z0 POQZ0OPO Z0S0S0J0 a
c
0Z0skZrZ Z0ZbopZ0 0ZQZ0Z0Z ZpZRZ0Zp 0Z0S0Z0Z Z0O0Z0AP PO0Z0OPJ Z0Z0ZqZ0
687 8
b
689
rZbl0skZ opo0Zpa0 0Z0Z0Zno Z0ZNZpMQ 0Z0Z0Z0Z Z0Z0Z0O0 PZPZ0OBO S0Z0ZRJ0 a
Pin
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrm0s0Z Z0oqZ0ak pZ0o0Zpo ZpZPZnZ0 0O0O0M0Z Z0Z0A0O0 PZ0L0ZBO Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
691 8 7 6 5 4 3 2 1
694
0Z0Z0Zrj Z0Z0Z0Z0 pl0o0Z0a ZpZbo0ZP 0O0Z0Z0Z Z0O0Z0MP 0ZRZ0L0J Z0Z0S0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0s0Z o0Z0j0ap 0opM0ZpZ Z0m0m0M0 0Z0Z0Z0Z Z0Z0Z0A0 PO0Z0ZPO Z0JRZ0ZR a
692 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
696
rZ0arZkZ Z0Z0Z0op pZqZpm0Z Z0Z0o0M0 PoBZPZ0Z Z0Z0Z0Z0 0OPZQZPO Z0ZRZRZK a
c
0sbZ0s0Z opZ0lpjp 0ZpZ0mpZ Z0ZpZ0A0 0Z0O0Z0Z Z0M0ZQM0 POPZ0OPO Z0Z0ZRJ0
693 8
b
695
0s0ZrZkZ opZ0Z0a0 0l0obm0Z ZPo0ZpZ0 0ZPZ0Opo Z0ZPZ0O0 PA0Z0MBO ZRZQS0J0 a
Pin
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0Z0s ZbZkZpZp pZ0apo0Z l0Z0Z0Z0 No0MPZ0Z ZQZ0Z0Z0 PO0Z0OPO S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
697 8 7 6 5 4 3 2 1
700
0s0Z0Z0s Z0Z0lka0 0ABo0Z0Z Z0ZPo0Z0 NZ0ZPo0m Z0ZQZPmP PZ0Z0M0J Z0S0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0s0ZkZ o0Z0Zpop 0l0Zbm0Z Z0Z0Z0Z0 0Z0M0Z0Z ZPZ0ZPZ0 PZ0L0ZPO S0ARZ0J0 a
698 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
702
0Z0Z0skZ o0Z0Z0Zp 0apZ0ZpZ Z0ZpZrZ0 0Z0Z0Z0Z ZPZnM0A0 0O0Z0OPO S0Z0ZRJ0 a
c
rZ0s0ZkZ opZ0Zpap 0ZnZ0mpZ ZNZ0Z0Z0 0Z0Z0Z0Z ZBMbAPZ0 PO0Z0ZPO Z0ZRS0J0
699 8
b
701
0Z0Z0snj Zpo0Z0ap 0Z0o0ZqZ Z0ZPZbZ0 0OPZNZ0Z s0ZBZ0Z0 0ZQZ0ZPO Z0A0SRJ0 a
Pin
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0srZkZ ZpZ0Zpap pZ0ZbmpZ l0o0Z0Z0 0mPZPA0Z ZPM0ZNZP PZ0ZBOPZ ZQS0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
703 8 7 6 5 4 3 2 1
706
rs0Z0ZkZ Z0o0apop pZ0ZnZ0Z ZpZ0O0Z0 PZ0ZNO0Z Z0Z0A0Z0 0O0Z0ZPO S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Zrs0ZkZ ZpZ0Zpop 0Z0Z0ZbZ oBZpZ0Z0 PZ0O0ZPZ Z0Z0ZPZ0 0O0Z0ZPZ S0Z0S0J0 a
704 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
708
0l0Zrs0j ZpZ0a0op pApZBm0Z O0Z0o0Z0 0Z0Z0Z0Z Z0Z0Z0O0 0OQZPO0O S0ZRZ0J0 a
c
rZ0Z0ZkZ Z0oqZpo0 0ZpZ0m0o Z0L0Z0Z0 0Z0Z0O0Z ZPO0Z0O0 0Z0Z0ZBO Z0Z0S0J0
705 8
b
707
rZbZ0s0Z o0Z0Zpjp 0o0ZpZpZ Z0ZqM0Z0 0Z0O0Z0Z O0Z0Z0Z0 0O0Z0OPO Z0SQZRJ0 a
Rook on the 7th or the 2nd rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZns0Z obZpZkoQ 0Z0Zqo0A ZpZ0Z0Z0 0Z0O0Z0S O0Z0Z0M0 0Z0Z0ZPO S0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
709 8 7 6 5 4 3 2 1
712
0ZrZ0ZkZ o0Z0apop qZrZpZ0Z Z0ZpZ0Z0 0o0OnZ0Z ZQZ0O0O0 PO0M0O0O S0A0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Zks0Z0s opZ0S0Zp 0Zbo0ZpA Z0o0Z0Z0 0ZPZ0Z0Z Z0ZqO0ZP PL0Z0ZPZ ZRZ0Z0J0 a
710 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
714
rZ0s0ZkZ o0ZnZpo0 0oqZ0Z0o Z0ZpS0ZN 0Z0O0Z0Z O0OQZ0Z0 0Z0Z0OPO Z0Z0S0J0 a
c
0s0Z0ZkZ o0o0Z0op 0Z0ZpZ0Z Z0OpZpZ0 0Z0ObZ0O O0ZqOPO0 0s0Z0Z0Z S0SBL0J0
711 8
b
713
0Z0Zrs0j ZbZ0Z0Zp pl0Zpo0Z ZpZ0Z0Z0 0Z0ZpM0Z Z0Z0O0L0 PO0Z0OPO Z0S0ZRJ0 a
Rook on the 7th or the 2nd rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0s0Z obZ0ZpZk 0o0ZpZpZ Z0l0Z0Z0 0Z0M0OQO Z0Z0O0Z0 PZ0Z0ZPZ Z0ZRZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
715 8 7 6 5 4 3 2 1
718
0Z0Z0s0j o0Z0Z0ap qZ0ZrZpZ Z0o0ZpZ0 0Z0ZpZ0Z Z0O0M0O0 POQS0O0O Z0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZrZ0skZ Z0ZbZ0Zp 0o0o0Z0Z o0mPo0Z0 0Z0Z0Z0Z ZPZ0Z0OP PA0ZQlBJ Z0ZRS0Z0 a
716 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
720
rZrZ0Z0j ZRZ0Z0S0 pZ0ZpopZ ZpZ0Z0Z0 0O0Z0Z0O Z0O0o0Z0 0ZnZ0Z0Z Z0Z0A0ZK a
c
rZ0Z0j0s Z0ZblpZ0 0Z0ZpZpo o0ZpO0Z0 Pm0M0Z0O Z0Z0LNZ0 0O0Z0OPZ S0S0Z0J0
717 8
b
719
rZ0Z0s0j Z0S0ZRo0 bZ0ZpM0o Z0ZpZpZP pZ0O0J0Z OpZ0OPO0 0O0Z0Z0Z Z0Z0Z0Z0 a
Rook on the 7th or the 2nd rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ lbZnapop pZ0o0m0Z Z0Z0o0A0 0ZBOPZ0Z Z0Z0ZNZP 0Z0MQOPZ ZRS0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
721 8 7 6 5 4 3 2 1
724
rZ0s0akZ ZbZ0Zpop pl0Z0Z0Z ZpZpM0Z0 0Z0ONZ0Z OQZ0Z0O0 0O0ZROPZ Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZrZ0j0s ZQZ0apop pZ0ZbZqZ Z0Z0ZpZ0 0Z0S0A0Z ZNZ0Z0Z0 PO0Z0ZPO Z0Z0S0J0 a
722 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
726
rZ0Z0ZkZ oRZ0Zpa0 0Z0spZpo Z0Z0O0Z0 0Z0m0O0Z Z0Z0A0Z0 0Z0ZBO0O Z0S0Z0J0 a
c
rZ0Z0Z0s opZbZpj0 0Z0o0l0o O0ZPm0oB 0O0ZPo0Z Z0S0Z0ZP 0Z0M0OPZ Z0SQZ0J0
723 8
b
725
0Z0Z0Z0Z Z0Z0Zpjp 0L0o0ZpZ Z0ZPl0Z0 0Z0ZPZ0O Z0Z0Z0O0 rZ0ZrOBZ Z0Z0ZRJ0 a
Rook on the 7th or the 2nd rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0ZkZ ZRZ0ZpZp 0Z0o0ZpZ ZNZPa0Z0 0ZRZPo0Z Z0Z0ZPZ0 rZ0Z0O0O Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
727 8 7 6 5 4 3 2 1
730
0Z0Z0Z0Z Z0s0Z0jp 0L0Z0opZ ZBZ0lnZ0 PZ0Z0Z0Z Z0Z0O0Z0 0Z0Z0ZPO Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0s0Z S0l0Z0jp 0ZNo0ZpZ Z0ZPo0m0 0ONZnZ0Z Z0ZBZ0Ob 0ZQZ0Z0O Z0Z0Z0ZK a
728 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
732
0ZbZ0snj Z0Z0l0ap 0L0o0ZpZ Z0oPo0Z0 0ZPZpZ0Z ZNZ0Z0Z0 0Z0ABOPO S0Z0Z0J0 a
c
0Zbl0snj Z0Z0Z0Zp RZ0o0m0a Z0oPopZ0 0ZPZ0Z0Z ZNM0ZPZ0 0ZQABZPO Z0Z0Z0J0
729 8
b
731
0ZbL0arj Z0Z0Z0Zp 0Z0o0m0Z Z0oPoqZ0 0ZPZpZ0Z Z0Z0A0O0 0Z0MBO0O S0Z0Z0J0 a
Rook on the 7th or the 2nd rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0ZkZ opo0Zpop 0ZBZ0Z0Z a0Z0Z0Z0 0Z0Z0O0Z Z0O0s0ZP PO0M0ZPZ S0ZKZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
733 8 7 6 5 4 3 2 1
736
rZbs0ZqZ o0ZnZ0ak 0ZRM0Zpo Z0Z0o0Z0 0Z0ZPo0Z A0Z0ZNZP 0Z0ZQOPZ Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0skZ Z0Z0Z0Zp pZ0Z0Z0Z Z0a0ZpZ0 0o0Z0Z0Z Z0Z0mPZP POPZ0Z0Z Z0JRS0Z0 a
734 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
738
rZrZ0ZkZ Zbl0Zpop 0o0ZpZ0Z Z0m0M0Z0 pZ0S0O0Z O0O0Z0Z0 BOQZ0ZPO J0ZRZ0Z0 a
c
0ZrZ0skZ ZbZ0Z0Z0 pl0Z0Z0Z Z0ZpO0M0 0onZPZPZ Z0ZRZ0Z0 POPZQZ0Z ZKZ0ZBZR
735 8
b
737
rZ0Z0ZkZ Zpoblna0 0Z0o0opZ Z0OPo0Zp rONZPZ0Z Z0Z0ZPZP 0Z0ZBAPZ ZRZQJ0ZR a
Rook on the 7th or the 2nd rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0s0j S0Z0Z0Sp pZ0ZrZbZ ZpZpZ0A0 0Z0Z0o0O Z0O0ZPZ0 PZ0Z0ZPJ Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
739 8 7 6 5 4 3 2 1
742
0Zrs0mkZ Z0Z0Zpop poqZ0Z0Z Z0ZpZQZ0 0Z0O0ZNO Z0Z0S0O0 PO0Z0OKZ Z0Z0S0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZbZ0s0j ZpZ0Z0Zp pZ0ZpspZ Z0ZpM0ln 0Z0O0Z0Z Z0Z0ZPZ0 PO0Z0ZPO ZBSQS0J0 a
740 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
744
0ZqZ0ZkZ ZpZ0Zrop pS0ApZ0Z Z0ZpO0Z0 PZ0Z0Z0Z Z0Z0ZPmP PZrZ0ZPJ Z0ZQS0Z0 a
c
0Z0Z0s0j S0Z0Z0Zp pZ0Z0M0Z ZpZ0obZ0 0O0Z0oPZ Z0Z0Z0Z0 0Z0ZrO0O Z0Z0ZRJ0
741 8
b
743
0ZrZ0Z0Z opZ0Z0ok 0Z0LPZ0Z Z0ZpZbZn 0Z0l0Z0Z Z0Z0ZPZ0 PO0Z0Z0O S0A0ZRZK a
Rook on the 7th or the 2nd rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0Zrj Z0ZRS0ap 0Z0Z0Z0Z Z0Z0ZpZ0 pZBZ0O0Z ZPZ0Z0O0 0Z0ZQZKO Z0l0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
745 8 7 6 5 4 3 2 1
748
0s0Z0ZkZ Z0Z0Zqo0 pZ0Zpm0o Z0Z0SpZ0 0ZpOPO0Z Z0O0Z0ZP rZ0M0ZPZ Z0L0Z0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0s0Z0skZ Z0o0Z0a0 0ZPo0mqZ ZRZPo0op RZ0ZPo0Z Z0ZQZPZ0 0Z0ZBAPO Z0Z0Z0J0 a
746 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
750
rs0Z0ZkZ Z0Z0Apa0 0ZpZ0ZpZ Z0Z0Z0Zp 0Z0ZpZ0O Z0ZbO0O0 0Z0Z0OBZ Z0SRZ0J0 a
c
rZ0Z0s0Z Z0ZRZpjp 0Z0ZRZpZ o0Z0Z0Z0 0l0Z0Z0Z Z0m0ZQZ0 PO0Z0OPO Z0Z0Z0J0
747 8
b
749
rZ0Z0Z0Z Z0ZkZ0o0 0Z0Z0opZ ZpZPZ0Z0 0apZ0Z0Z Z0Z0ZRA0 0O0ZrOPO ZKZRZ0Z0 a
Rook on the 7th or the 2nd rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0Z0Z ZpZ0Z0jp 0Z0Z0ZpZ o0Z0ZqZ0 Pm0Z0O0Z Z0Z0Z0ZP 0OPL0Z0Z Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
751 8 7 6 5 4 3 2 1
754
rZrl0ZkZ ZpZ0ZpZ0 pZ0Z0O0o Z0ZpZpoP PZ0O0Z0Z Z0O0S0O0 0Z0Z0O0Z ZRZQZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0ZkZ ZqZnS0ap pZ0o0ZpZ Z0ZPZpZ0 0O0Z0Z0Z Z0ZBZpZP 0Z0A0OPZ Z0L0Z0J0 a
752 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
756
rZ0Z0skZ o0obZ0op 0Zpo0m0Z l0Z0Z0M0 0ZPM0O0Z Z0ZQZ0ZP PO0Z0ZPZ Z0Z0SRJ0 a
c
0ZbZ0ZkZ Z0Z0Zqo0 pZ0s0m0o Z0ZpZ0Z0 0Z0A0Z0Z ZRO0Z0LP PZ0MrZPZ Z0ZRZ0J0
753 8
b
755
0Z0Z0ZkZ Z0ZRS0o0 pZpZ0ZrZ ZpZ0Z0Zp 0Z0Z0Z0O Z0Z0ZPZ0 POrZ0ZPZ Z0Z0Z0J0 a
Rook on the 7th or the 2nd rank
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0Z0Z Z0Z0Zbjp 0oQZ0ZpZ l0ZpZ0Z0 0Z0O0Z0Z s0OBZ0Z0 0Z0Z0OPZ ZRZ0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
757 8 7 6 5 4 3 2 1
760
0ZrZ0ZkZ o0Z0Zpop bo0Z0Z0Z Z0opZ0l0 0O0O0Z0s ZPZ0O0O0 0AQZ0O0O Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0lrakZ o0Z0ZpZp 0ZpZpZpZ Z0mpO0M0 0ZbZ0OQZ Z0Z0O0Z0 PABZ0ZPO Z0ZRZRJ0 a
758 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
762
rZbmrl0j ZpZpZ0Zp 0opZ0ZpZ Z0Z0Z0ZR 0ZBO0Z0Z Z0ZQZ0Z0 PO0A0OPO Z0Z0Z0J0 a
c
rZ0lrZkZ ZbopZpop 0o0a0Z0Z oPZ0Z0Z0 0ZPZ0Z0Z O0MQO0Z0 0Z0ZROPO Z0A0ZRJ0
759 8
b
761
0sbZrZkZ o0o0lpop 0Zpa0Z0Z Z0Z0Z0Z0 0ZPZ0ZnZ Z0Z0O0O0 PA0ZBO0O S0LNZRJ0 a
Sacrifice on h7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rmbl0skZ opZ0Z0ap 0m0o0ZpZ Z0oPZ0M0 0Z0Z0O0Z Z0MBZ0Z0 PO0Z0ZPO S0AQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
763 8 7 6 5 4 3 2 1
766
0Zbs0Z0j opo0l0Zp 0Zns0M0Z Z0Z0Z0Z0 0ZBO0S0Z Z0Z0ORZ0 PZ0Z0ZQO Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rmbl0s0j opZnoPap 0Z0o0Z0Z Z0Z0O0Z0 0Z0Z0O0Z Z0o0ZNZ0 POPZ0ZPZ S0AQJBZR a
764 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
768
rZbl0skZ Zpo0Zpop 0Z0Zpa0Z o0Z0Z0Z0 0m0O0Z0O Z0ZBZNZ0 POPAQOPZ Z0JRZ0ZR a
c
rZ0Z0skZ opZnZpop 0Z0lpZ0Z Z0ZnM0O0 bZ0O0Z0Z O0ZBZQZ0 0Z0A0O0O ZRZ0S0J0
765 8
b
767
rm0l0skZ opoba0op 0Z0Zpo0Z Z0ZpO0Z0 0Z0O0Z0O Z0MBZNZ0 POPZ0OPZ S0ZQJ0ZR a
Sacrifice on h7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZbskZ ZpZ0Z0op pZnlpZ0Z Z0mpZ0Z0 0Z0Z0O0Z O0MBZNZ0 0OPL0ZPO Z0Z0SRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
769 8 7 6 5 4 3 2 1
772
0Z0ZrZkZ Z0l0ZrZp pZ0ZbL0Z ZpZ0Z0Ap 0Zno0Z0Z Z0Z0Z0Z0 POBZ0OPZ Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZrakZ ZqZ0Zpop 0ZRs0Z0Z ZpZPZBZ0 0ZbZPS0Z o0Z0Z0O0 0Z0Z0O0O A0L0Z0J0 a
770 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
774
rZ0ZqskZ opZ0Z0op 0Z0ZpZ0Z ZPZnZBa0 0Z0O0Z0Z S0Z0ZQZ0 0O0A0OPO Z0Z0ZRJ0 a
c
rZbZrZkZ opZ0Zpop 0Z0Z0A0Z Z0ZQO0Z0 0Z0l0Z0Z Z0ZBZ0Z0 Pa0Z0OPO Z0Z0SRJ0
771 8
b
773
rm0l0skZ obZpZpop 0Z0ZpZ0Z Z0onO0Z0 0apZ0Z0Z Z0M0ZNZ0 PO0Z0OPO SBAQJ0ZR a
Sacrifice on h7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0s0ZkZ ZpZblpop pZnMpZ0Z Z0Z0O0Z0 0ZPZ0m0Z Z0ZBZNZ0 PO0Z0ZPO ZKZRL0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
775 8 7 6 5 4 3 2 1
778
rZqZ0skZ opo0S0op 0mbo0Z0Z Z0ZpZ0A0 0ZPZ0ZPZ Z0ZBZ0ZP PZPZ0O0Z ZRZQZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0skZ obZ0lpop 0onZ0Z0Z Z0ZpO0Z0 0Z0Z0L0Z Z0ZBZNZ0 PZ0Z0OPO Z0ZRS0J0 a
776 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
780
rZ0l0skZ o0ZnZpop 0o0Zpm0Z Z0ZpM0A0 0ZbO0O0Z Z0OBZ0Z0 PZ0Z0ZPO S0ZQZRJ0 a
c
rZbZ0skZ opZ0Zpop 0ZnapZ0Z l0Z0Z0Z0 0Z0O0Z0Z ZRZBZNZ0 PZ0Z0OPO Z0AQZRJ0
777 8
b
779
0Zrl0skZ obZ0Zpop 0o0Z0Z0Z Z0ZpO0Z0 0Z0Z0L0Z Z0ZBZNZ0 Pm0Z0OPO Z0ZRS0J0 a
Sacrifice on h7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ Z0Z0Z0op pZnZpO0Z Zpm0Z0Z0 0Z0Z0l0Z Z0MBS0Z0 PO0ZQOPO Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
781 8 7 6 5 4 3 2 1
784
rmbl0skZ opZ0apop 0Z0Z0Z0Z Z0opO0Z0 0Z0Z0Z0Z Z0OBZNZ0 POPZ0ZPO S0AQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0ZnskZ lpZ0Zpop pZnZpZ0Z ZbM0A0Z0 0Z0Z0Z0Z Z0SBZ0L0 POPZ0ZPO Z0Z0ZRJ0 a
782 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
786
rZbs0ZkZ Zpl0Zpop pZ0ZpO0Z Z0Z0Z0Z0 0m0Z0OPZ ZNoBZ0Z0 POPZ0L0O Z0JRZ0S0 a
c
0Zrs0ZkZ o0l0apop 0o0ZpZ0Z m0ZnZ0ZP 0Z0O0Z0Z Z0Z0ZQZR PZ0ZNOPZ ZBARZKZ0
783 8
b
785
rZbZ0skZ Z0lpapop pZpZpZ0Z Z0OnZ0Z0 NZ0A0O0Z Z0ZBZ0Z0 PO0Z0ZPO S0ZQZRJ0 a
Sacrifice on h7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrakZ opl0Zpop 0ZbZpA0Z Z0Z0Z0Z0 0Z0Z0ZQZ ZPZBZ0ZP PZPZ0OPZ S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
787 8 7 6 5 4 3 2 1
790
rZ0l0skZ Z0ZnZpop 0Z0Z0Z0Z ZpaPZ0O0 pZNZ0Z0O OnABOQZ0 0Z0Z0O0Z S0Z0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0skZ obZnZpop 0lpZpZ0Z Z0Z0O0a0 0o0OBZ0Z Z0Z0ZNZ0 PO0Z0OPO S0ZQZRJ0 a
788 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
792
rZ0l0skZ opZ0Zpop 0Zpm0Z0Z Z0ZpS0Z0 0Z0O0A0a Z0ZBZ0L0 POPZ0OPO S0Z0Z0J0 a
c
rZ0Z0skZ ZpZ0Zpop pZ0Zba0Z Z0Z0SBZ0 0Z0Z0S0Z lNO0Z0Z0 PZ0Z0ZPO Z0Z0L0J0
789 8
b
791
rZbl0skZ o0Znapop 0o0ZpZ0Z Z0opO0Z0 0Z0Z0A0O Z0OBO0Z0 PO0M0OPZ S0ZQJ0ZR a
Sacrifice on h7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rmqZrZkZ ZbZ0Zpop pZ0Z0a0Z ZpoPM0Z0 0Z0ZBA0Z Z0Z0ZQO0 PO0Z0O0O S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
793 8 7 6 5 4 3 2 1
796
0Z0s0skZ apl0Zpop pZbZpZ0Z Z0O0Z0Z0 0O0ZBZ0Z O0Z0ZQZ0 0A0Z0OPO Z0S0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0snskZ ZbZ0Zpop 0l0ZpZ0Z o0Z0O0O0 0o0M0Z0Z Z0ZBL0Z0 POPZ0Z0O Z0JRZRZ0 a
794 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
798
0lrsbakZ ZpZnmpop pZ0ZpZ0Z Z0Z0O0Z0 0ZPZ0Z0Z ZPM0M0Z0 PA0ZQZPO ZBZ0SRZK a
c
0Z0s0skZ Z0oqmpop pZ0Z0Z0Z ZpZpO0Zb nO0Z0Z0Z Z0O0ZNZ0 PZBZ0OPO S0AQS0J0
795 8
b
797
rm0lrZkZ ZpZ0apop pZ0ZpZ0Z Z0ZpO0Z0 PZ0O0A0Z Z0SBZQZP 0O0Z0OPZ S0Z0Z0J0 a
Sacrifice on h7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ Z0opapop 0o0m0Z0Z o0mPZ0Z0 0Z0Z0A0Z Z0Z0ZNZ0 POBM0OPO Z0SQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
799 8 7 6 5 4 3 2 1
802
0s0Z0skZ Zpl0Zpop pm0a0Z0Z ZRZ0Z0A0 PZpO0Z0Z Z0Z0ZQZP 0ZBZ0OPZ Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0ZrskZ Z0l0Zpop pZbZpZ0Z ZpZpO0A0 0ZnZ0Z0Z O0OBZ0Z0 0O0ZQOPO S0Z0S0J0 a
800 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
804
rZ0Z0skZ Z0Z0Zpop bl0ZpZ0Z Z0a0L0Z0 RZ0Z0Z0Z Z0OBZ0Z0 0O0Z0ZPO Z0A0ZRZK a
c
rZbZrZkZ opZ0Zpop 0Z0ZpA0Z Z0l0O0Z0 0Z0Z0Z0Z Z0ZBZ0Z0 PZ0Z0OPO Z0ZQZRJ0
801 8
b
803
rZbZ0skZ Zpl0Zpop pZ0o0Z0Z Z0ZPm0a0 PZPZ0Z0Z Z0ZBZNL0 0Z0Z0ZPO ZRZ0ZRZK a
Sacrifice on h7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZbZrskZ Z0l0Z0op pZ0SpZ0Z Z0o0O0Z0 0mPZBZPZ ZPZ0ZNZ0 0Z0Z0L0O Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
805 8 7 6 5 4 3 2 1
808
0s0s0ZkZ obZQZpop 0Z0ZpZ0Z Z0l0Z0Z0 0Z0ZBZ0Z Z0Z0O0Z0 0O0M0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0ZrmkZ obl0a0op 0opZpo0Z Z0Z0M0Z0 0ZPO0ZQZ Z0ZBZ0Z0 PO0A0OPO S0Z0S0J0 a
806 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
810
rZ0lrakZ Z0Z0Zpop pm0o0Z0Z mpZ0O0O0 0Z0o0Z0Z Z0Z0ZNZ0 POBZ0OPZ S0AQS0J0 a
c
0j0Z0srZ ZbZ0Z0Zp pl0apZ0Z ZpZ0Z0Z0 0Z0Z0ZnZ Z0Z0Z0O0 0ZQZBO0O Z0SNMRJ0
807 8
b
809
rm0Z0skZ opZbopap 0lpZ0ZpZ Z0Z0O0M0 PO0OBZ0Z Z0O0A0Z0 0Z0ZQZPO S0Z0ZRJ0 a
Sacrifice on h7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblrmkZ opZnapop 0ZpZpZ0Z Z0ZpM0Z0 0Z0O0A0Z Z0OBO0ZP POQM0O0Z S0Z0J0S0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
811 8 7 6 5 4 3 2 1
814
rZrZ0ZkZ Z0Z0Zpo0 pZ0ZpZ0o lpZbO0Z0 0Z0Z0Z0Z ZPaBA0Z0 PZPZQZPO ZKZRZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Zrs0j0Z o0Z0apo0 0ZpZpm0o ZpZqZPA0 0Z0O0ZPZ Z0ZBL0ZP POPZ0Z0Z ZKZRZ0ZR a
812 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
816
0Z0ZqZ0j Z0Z0Z0o0 0o0Zps0o Z0s0Z0Z0 0ZPZQA0Z Z0Z0Z0ZR 0mPZ0ZPO Z0Z0ZRZK a
c
rZblrZkZ Zpm0apo0 pZpZ0m0o Z0OpM0Z0 0O0O0Z0Z Z0ZBZNZP PZ0A0OPZ Z0LRS0J0
813 8
b
815
0ZrlrZkZ opZ0apo0 0Z0Zpm0o Z0Z0M0A0 bZ0O0Z0Z Z0OBZ0ZQ PZ0Z0OPO S0Z0S0J0 a
Sacrifice on h6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0a0s0m0j opZrZpo0 0ZpZ0Z0o l0ZpZ0ZP 0Z0Z0Z0Z ZBO0ZQO0 PO0Z0O0Z Z0ARS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
817 8 7 6 5 4 3 2 1
820
rZ0Z0skZ obopl0o0 0o0Z0Zno a0ZPZpZ0 0ZPZ0ONZ ZRZBZ0Z0 PA0Z0ZPO Z0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZrZ0ZkZ oRZ0Zbo0 qmnZ0o0o Z0ZpZNZ0 0ZpO0Z0Z a0O0ZBAP PZ0L0OPM Z0Z0S0J0 a
818 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
822
rZ0l0skZ Z0a0mpo0 0opobZ0o o0Z0O0ZQ 0Z0O0Z0Z O0Z0ZNZ0 0ZBZ0OPO S0A0S0J0 a
c
rZ0ZrakZ m0lnZ0o0 pZ0o0Z0o ZpZbo0Z0 PO0ZNZ0M Z0Z0Z0Z0 0Z0ZQOPO SBA0S0J0
819 8
b
821
rZrl0ZkZ ZpZbZpap nZ0o0ZpZ Z0ZPo0Z0 BO0ZPm0Z Z0M0A0ZP RZ0ZNOPZ ZQZ0ZRJ0 a
Sacrifice on h6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ ZpZnapo0 0Z0ZpZ0o o0ZpO0Zb 0Z0O0A0Z ZPZBLNZP PZ0Z0OPZ ZRZ0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
823 8 7 6 5 4 3 2 1
826
0s0ZrakZ Zbl0Zpop pZ0o0Z0Z Z0m0ZNO0 0o0APZ0O Z0ZBZ0Z0 POPL0Z0Z ZKZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0l0skZ Z0o0apop 0Z0ZbZ0Z ZpZpO0Z0 pZ0O0Z0Z Z0Z0Z0ZP POBA0OPZ S0ZQS0J0 a
824 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
828
rmbZ0skZ opZ0a0o0 0l0ZpZ0o Z0ZpO0Z0 0Z0O0Z0Z Z0ZBZNO0 POQZ0ZKO S0A0Z0ZR a
c
rZ0lrZkZ o0Z0apoN 0o0ZpZ0o m0ZbZ0ZQ 0Z0O0Z0O Z0OBZ0Z0 PZ0Z0OPZ S0A0S0J0
825 8
b
827
0ZrZ0skZ o0Z0Zpo0 0o0ZpZ0o Z0ZpO0Z0 0Z0Z0ONL Z0ZpZNZ0 PZqZnZPO Z0ZRZRZK a
Sacrifice on h6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rlrZ0ZkZ obZnZpo0 0o0ZpZ0o Z0ZnZ0A0 0Z0O0Z0Z Z0OBZNZ0 PZ0L0OPO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
829 8 7 6 5 4 3 2 1
832
0ZrsbZkZ opZ0Zpo0 0Znapm0o l0Z0Z0Z0 0Z0O0Z0Z O0M0A0ZP BO0LNOPZ Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZrZ0ZkZ Zbl0Zpo0 0o0ZpZno o0Z0O0AQ 0ZPZBZ0Z Z0Z0Z0ZR PZ0Z0OPO Z0Z0S0J0 a
830 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
834
rZ0Zraqj ZpZ0Z0o0 pZ0Z0oQo Z0Z0o0ZR PZ0ZPZ0Z Z0ZPZRZ0 0O0A0ZPO Z0Z0Z0ZK a
c
qZ0Z0a0Z ZbZpZpj0 0Z0ZpMpo opZ0O0Z0 0Z0ZRZ0L ZPZrZNZP PZ0Z0OPZ Z0Z0Z0J0
831 8
b
833
rm0ZrZkZ ZpZ0lpo0 pZ0Z0a0o Z0Z0ZPZQ 0Z0o0Z0Z ZBZ0Z0ZR POPZ0O0O S0A0ZKZ0 a
Sacrifice on h6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ Zblpmpo0 0ZnZpZ0o ZRZ0O0Z0 pZ0M0A0Z O0Z0Z0OP 0O0L0OBZ Z0S0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
835 8 7 6 5 4 3 2 1
838
rZ0s0ZkZ ZpZbapo0 pZ0opm0o l0Z0Z0A0 0Z0LPOPO Z0M0ZBZ0 POPZ0Z0Z Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0skZ Z0Z0apo0 pZ0ZpZ0o ZpZnO0Z0 0Z0ZNA0Z Z0Z0ZQZ0 POqZ0ZPO Z0Z0SRZK a
836 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
840
rZbl0skZ opo0Z0o0 0Z0ZpZ0o a0ZnMpZQ 0Z0O0Z0Z O0OBZ0Z0 0ZPA0OPO S0Z0S0J0 a
c
rZ0s0ZkZ ZpZ0Zpo0 0Z0ObZ0o o0Z0Z0ZQ 0a0S0Z0Z ZqZNA0Z0 0O0Z0OPO Z0S0Z0J0
837 8
b
839
bZ0l0skZ s0Znapon pZ0Z0Z0o ZpZpM0Z0 0ZpO0APZ O0M0OPZQ 0OBZ0Z0O Z0ZRZRJ0 a
Sacrifice on h6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0s0j o0Z0Zpo0 0Z0Zpm0o Zpa0M0Z0 qZ0Z0Z0Z Z0O0Z0L0 0O0A0OPO ZBJRS0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
841 8 7 6 5 4 3 2 1
844
0ZnZ0s0j Z0l0Z0o0 rZpZ0o0o Zpm0oPZP 0Z0Z0Z0Z ZPO0ZQZ0 0ZBZ0OPZ Z0ARS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0s0skZ ZpZ0apo0 pZqZ0Zno Z0ZpZBZQ PZ0Z0Z0Z ZPZ0ARZ0 0ZPZ0ZPO Z0ZRZ0ZK a
842 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
846
rZ0l0skZ Z0opZ0o0 0Z0ZpZ0o ZpZnO0Z0 0ZbZBZ0Z Z0O0Z0O0 PZQZ0O0O S0ARZ0J0 a
c
0Z0s0ZkZ obs0Zpo0 0o0Z0m0o Z0ZqMpZ0 0Z0O0Z0Z O0O0ZPZR 0Z0A0ZPO S0Z0L0J0
843 8
b
845
rZbl0skZ opZ0Zpo0 0mpa0m0o Z0Z0Z0Z0 0Z0O0Z0Z ZBM0ZNZP POQZ0OPZ S0A0ZRJ0 a
Sacrifice on h6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ Z0l0Z0o0 bZnZ0o0o o0ZpZPZ0 0o0a0ZBL Z0Z0Z0ZR POPZ0ZPO Z0ANS0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
847 8 7 6 5 4 3 2 1
850
rl0Z0skZ opZbZpo0 0Z0o0Zno Z0oPZ0ZQ PZPZPA0Z Z0OBZ0Z0 0Z0Z0ZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0s0ZkZ o0Z0apo0 qZpZpm0o ZpOrZ0Z0 0Z0O0Z0S ZPZ0ZNO0 PZQA0OKO Z0Z0S0Z0 a
848 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
852
rZ0lrZkZ obZnapo0 0opZ0m0o Z0Z0ZNA0 0Z0ONZ0Z O0Z0Z0O0 0O0Z0OBO S0ZQZRJ0 a
c
rZrl0ZkZ obZ0mpo0 0o0Zpm0o ZPZ0M0Z0 0O0O0A0Z Z0ZBL0Z0 0Z0Z0OPO S0Z0S0J0
849 8
b
851
rZ0Z0skZ lbZnZpo0 pa0ZpZ0o ZpZnZ0Z0 PO0Z0A0L Z0MRZNO0 0Z0ZPOBO Z0Z0ZRJ0 a
Sacrifice on h6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrmkZ ZpZ0apo0 pZ0Z0Z0o l0Z0oNZ0 0ZBZ0A0Z Z0O0O0Z0 PZQZ0OPO ZRZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
853 8 7 6 5 4 3 2 1
856
rZ0s0ZkZ opl0apo0 0Zbopm0o Z0Z0Z0A0 0Z0MPZ0Z Z0M0Z0Z0 POPL0OPO ZKZRS0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0skZ obZ0apo0 0o0Zpm0o Z0ZqM0A0 0Z0O0Z0L Z0Z0ZPZ0 PO0Z0ZPO ZBZRZ0J0 a
854 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
858
0ZrZrmkZ ZbZ0apo0 0lnZpZ0o opZpO0Z0 0Z0O0ZNO Z0Z0ZNOB PO0A0O0Z S0ZQS0J0 a
c
rZbs0ZkZ o0l0Zpo0 0Z0ZpZno Z0opO0ZQ 0ZnZ0Z0Z Z0OBZNZ0 0ZPZ0OPO S0A0S0J0
855 8
b
857
rZ0l0s0j o0o0mpo0 0o0ZpZ0o m0ZpO0ZN 0Z0O0ZPO ObO0ZPZ0 0Z0Z0L0Z SBA0J0ZR a
Sacrifice on h6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbs0ZkZ o0l0a0o0 0mpZ0oPo ZpZnZPZ0 0Z0ZNZ0Z Z0ZNZQZ0 POPA0Z0O Z0JRZBS0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
859 8 7 6 5 4 3 2 1
862
rZ0l0skZ Zpo0Z0o0 pZna0m0o Z0ZpZ0Z0 0Z0O0Z0Z Z0O0ZNZN POQZ0ZPO S0A0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0skZ o0lbapo0 0o0Zpm0o mPZpM0A0 0Z0Z0Z0L Z0OBONZ0 PZ0Z0OPO S0Z0ZRJ0 a
860 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
864
rZ0l0skZ ZbZpmpo0 pZ0Z0Z0o ZpZnM0Z0 0Z0Z0Z0Z ZBZ0Z0Z0 PO0Z0OPO S0AQS0J0 a
c
0Z0ZrskZ opZnlpo0 0ZpapZ0o Z0Z0Z0ZQ 0Z0O0Z0Z Z0OBZ0O0 PO0Z0O0Z S0A0S0J0
861 8
b
863
rZ0l0ZkZ ZbZ0a0o0 0Z0Zps0o Z0opZ0Z0 0Z0Z0Z0Z ZPZQZNZR 0ZPZ0OPO Z0A0S0J0 a
Sacrifice on h6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZnl0akm ZrZ0Zpo0 0o0o0Z0o ZNoPoQZP 0ZPZPZNZ ORZ0A0O0 0Z0Z0OKZ S0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
865 8 7 6 5 4 3 2 1
868
rZ0ZrZkZ opZ0Zpo0 0Z0o0Z0Z Z0l0Z0Zp 0ZPZ0Z0Z ZPA0ZQZP nZ0Z0OPZ Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0l0Z0skZ ZpZ0Lpop pZbZ0Z0Z Z0Z0Z0Z0 0Z0A0Z0Z ZPZ0Z0O0 PZrZPO0O S0ZRZ0J0 a
866 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
870
rZ0Z0skZ Z0ZqZ0op 0Z0ZpZ0Z Z0ZnApZ0 bZBM0Z0Z Z0Z0Z0Z0 0OPZQOPO Z0Z0ZRJ0 a
c
0Z0Z0skZ opZ0Zpop 0Z0Z0Z0Z Z0m0AQZ0 0ZqZ0Z0Z Z0Z0ZPO0 PZnZ0Z0O Z0ZRS0J0
867 8
b
869
rZ0Z0skZ Z0l0apop pZbopZ0Z Z0Z0ZPO0 0o0APZ0Z ZPM0Z0Z0 0OPZQZ0O Z0JRZ0S0 a
Sacrifice on g7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ opZ0apo0 0Z0ZpZ0o Z0oPA0ZP 0ZPZ0ZnZ Z0ZQZ0M0 PO0Z0OPZ Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
871 8 7 6 5 4 3 2 1
874
rZbZ0skZ opZnZpo0 0Z0ZpZ0o l0Z0A0Z0 0Z0Z0O0Z Z0ZBZ0Z0 PZPZQZPO Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0s0ZkZ Z0l0apop pZnZbZ0Z Zpm0oNM0 0ZpZPZ0Z Z0O0Z0ZP POBZQOPZ S0A0S0J0 a
872 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
876
rm0Z0skZ opl0Zpop 0Zpa0mbZ Z0Z0ZNZ0 0ZBO0Z0Z Z0Z0Z0Z0 POPZNZPZ S0A0LRZK a
c
rZ0Z0snj Z0lnZpop pZ0Z0Z0Z Z0aPoNZ0 0o0Z0Z0Z Z0ZBZ0Z0 POPZ0ZPO S0A0LRZK
873 8
b
875
rZ0Z0skZ Z0ZbZpop pZ0OpZ0Z l0ZnZ0Z0 No0A0ZPZ ZPZ0Z0S0 0OPL0O0O Z0JRZ0Z0 a
Sacrifice on g7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0skZ Z0m0a0op pZ0Zbo0Z l0o0A0ZN 0Z0Z0ZPZ Z0OPZ0ZP PZ0L0ZBZ S0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
877 8 7 6 5 4 3 2 1
880
rZbZ0j0Z opZqaps0 0ZpZ0m0Z O0Z0o0Z0 0OBZPo0o ZQO0Z0ZP 0Z0MNOPZ Z0ZRS0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
ra0l0skZ opZ0Zpo0 0m0ZbZ0o Z0ZpZNZ0 0Z0OnO0Z Z0M0Z0O0 POQZ0ZBO S0A0ZRJ0 a
878 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
882
rZbZ0skZ o0Z0Zpop 0o0Z0Z0Z Z0lpONZ0 0SPZ0L0Z O0Z0Z0Z0 0Z0Z0OPO Z0Z0ZRJ0 a
c
0Z0Z0j0Z Z0l0Z0op pm0Z0ZbZ ZpopZNL0 0Z0Z0Z0Z ZPO0ZrO0 PZBZ0Z0O Z0Z0S0J0
879 8
b
881
rZ0Z0ZkZ Z0Z0Zpop pZbmqm0Z ZpZ0ZNZ0 0O0A0Z0Z Z0Z0ZPZP PZBZ0ZPZ S0ZQZ0J0 a
Sacrifice on g7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZrZkZ oplbZpo0 0Z0Z0Z0o m0ZRZNZ0 0a0Z0Z0Z Z0M0A0O0 POQZPO0O Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
883 8 7 6 5 4 3 2 1
886
0mrlrZkZ o0Z0apop 0Z0Z0m0Z Z0ZPZNZ0 0ZpZ0Z0Z Z0Z0M0O0 PA0L0OBO Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0skZ o0ZnZ0o0 0l0Lpm0o ZPZ0Z0Z0 PZ0Z0Z0A Z0o0Z0Z0 0ZBZKO0O S0Z0Z0S0 a
884 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
888
rZ0ZrmkZ ZpZ0Zpo0 pZblpm0o Z0Z0Z0SP 0Z0O0Z0Z S0Z0ZNZ0 0O0A0OPZ ZBZ0L0J0 a
c
0Zqs0s0j Z0Z0apo0 pZ0Zpm0o ZbZpZ0S0 0Z0ZPO0Z Z0ABZ0MQ 0OPZ0ZPO Z0Z0ZRZK
885 8
b
887
rZ0l0Zks Z0onZpo0 pZ0o0m0o ZpaPoNZ0 0Z0ZNZPA Z0OPZQZ0 PO0Z0O0O S0Z0J0ZR a
Sacrifice on g7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZbZ0s0j Z0opZ0o0 0Z0m0o0Z Z0L0Z0Zp 0ZPZ0Z0Z Z0ZBOPS0 0A0OKO0l Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
889 8 7 6 5 4 3 2 1
892
rZ0Z0skZ Zbl0apo0 pZ0o0ZRZ ZpmBmpZ0 0Z0ZPZ0Z Z0M0A0Z0 POPZQO0O Z0JRZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0s0mkZ Z0o0Z0o0 pZPZpl0o ZpZbMpZQ 0Z0O0O0a Z0ZBA0Z0 PO0Z0Z0O Z0JRZ0S0 a
890 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
894
rZbl0ZkZ opZ0m0op 0Z0Zps0Z Z0ZpZPZQ 0Z0O0Z0Z O0OpZNZ0 0ZPZ0O0O S0A0J0S0 a
c
0s0Z0skZ Z0ZQZ0op pZ0ZpZ0Z Z0Z0Z0A0 0Z0mpZ0Z Z0Z0Z0S0 PlPZBZ0O Z0ZKZ0S0
891 8
b
893
0ZrZrZkZ opZ0Zpop 0Z0Z0m0Z ZqMpm0Z0 0Z0A0Z0Z Z0Z0ZPZP POPL0O0Z Z0JRZ0S0 a
Sacrifice on g7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZkZ0s Zbl0Zpa0 pZ0o0m0Z Zpo0mPZ0 0Z0Z0Z0o Z0OBA0ZN PO0LNZPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
895 8 7 6 5 4 3 2 1
898
bl0Z0skZ Z0ZnZ0Zp 0Z0Z0ZpZ ZPM0Z0Z0 0Z0o0Z0Z APZ0Z0Z0 0Z0LBOPa Z0Z0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0lrZ0Z0Z Z0Z0jpZQ pZ0Z0s0Z ZpZbo0Z0 0Z0Z0Z0O Z0O0Z0Z0 POBZ0OPZ Z0ZRZRJ0 a
896 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
900
0Z0Zrs0j MbZ0Z0o0 0Z0ZBZ0o Z0o0a0Zq 0Z0Z0o0O O0Z0Z0ZQ 0Z0Z0OPZ ZRZ0S0J0 a
c
0j0ZrZ0s opo0Z0Z0 0Z0a0o0Z Z0ZqZ0op 0Z0O0Z0m O0Z0APZP 0O0Z0ZPZ SQZRZNJ0
897 8
b
899
rZ0Z0skZ opZ0apop 0ZbZpZnZ Z0Z0l0Z0 0OPZ0Z0Z O0M0A0ZP 0ZQZBOPZ S0Z0S0J0 a
Sacrifice on g7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ Zpo0Zpop 0ZnZ0l0Z o0a0o0Z0 0ZNZPm0Z ZBO0ANZP POQZ0OPJ S0Z0ZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
901 8 7 6 5 4 3 2 1
904
0ZrZ0ZrZ Z0Z0ZpZk pZ0obZ0Z Z0Z0Z0Z0 NL0ZpZ0l Z0Z0O0Z0 PO0Z0ZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0s0ZbZkZ Z0Z0Zpop pZ0ZNZ0Z l0ZpO0Z0 nZ0Z0L0Z Z0Z0Z0Z0 0sPZ0ZPO SBZ0ZRZK a
902 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
906
rZ0Z0Z0j oponZ0sp 0Z0o0a0l Z0ZPZbZ0 0OPZ0o0Z Z0MBZNZP PZ0Z0OPJ Z0SQZ0S0 a
c
0ZrZrZkZ ZbZqapop pZ0opA0Z Z0m0Z0O0 0o0ZPO0Z ZNMPZ0SQ PO0Z0Z0O ZKS0Z0Z0
903 8
b
905
0Zqa0ZkZ ZpZ0spo0 pZ0o0m0o O0ZPZ0Z0 0ZNZPZ0Z Z0OQA0Z0 0s0Z0ZPO Z0SRZ0J0 a
Sacrifice on g7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0Zrj Z0a0ZpZp BZbZ0Z0Z Z0Zpl0Z0 0Z0ZpZ0Z S0O0Z0ZP QO0Z0OPZ Z0Z0SNJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
907 8 7 6 5 4 3 2 1
910
rl0ZrZkZ Z0Z0Zpo0 pZ0Z0Z0Z Z0Z0aNO0 0o0ZPZ0O Z0Z0ZQZ0 PO0Z0ZKZ Z0Z0ZRZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZrZ0ZkZ ZpZ0S0o0 pZ0ZnZ0o Z0oqZ0Z0 0Z0Z0Z0O ZPZPZ0O0 PA0L0Z0J Z0Z0Z0Z0 a
908 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
912
0Z0Z0akZ l0Z0Zpo0 0Z0o0Z0o ZpZ0oPZn 0O0Z0Z0m ZBOQMPZP 0Z0Z0ZPZ s0A0SKZ0 a
c
0Z0ZrskZ obZ0Zpop 0lpZ0Z0Z Z0ZpZQZ0 0Z0m0Z0Z Z0M0Z0SP POPZ0OPZ Z0A0S0J0
909 8
b
911
rZ0Z0a0j opZbZpop 0Z0ZpA0Z Z0ZqS0Z0 0Z0M0O0Z OPZ0L0SP 0Z0Z0ZPJ Z0Z0s0Z0 a
Sacrifice on g7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ ZRZ0Z0o0 0Z0Z0Z0o Z0Z0O0Z0 0Z0ZQo0Z Z0O0ZBlb 0ZPZ0ZPZ Z0ZRZKZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
913 8 7 6 5 4 3 2 1
916
rm0Z0skZ opoqZpop 0Z0o0Z0Z Z0Z0m0Z0 0ZBL0Z0Z Z0Z0Z0Z0 PA0Z0O0O S0Z0Z0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZbZ0ZkZ Z0Z0Zpo0 0ZpZ0a0o Z0L0ZPZ0 PZ0ZPl0Z Z0Z0Z0Z0 Ps0Z0ZBO ZRS0Z0J0 a
914 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
918
0Z0Z0Z0Z Z0Z0ZQok pZ0Z0Z0o O0a0Z0Z0 0Z0ZpOnZ Z0OpZ0ZP 0O0AblPZ S0Z0S0ZK a
c
rl0ZrZ0j Z0ZBZpo0 0O0Z0Z0o Z0o0Z0Zn 0ZNo0Z0Z Z0Z0ZbZP 0AQZ0OPa ZRZ0S0ZK
915 8
b
917
0ZbsrZ0j Zpl0Zpop pZ0Z0Z0Z Z0Z0oPZQ 0ZpaPZ0Z ZPZ0Z0SP PZ0Z0ZBJ ZRA0Z0Z0 a
Sacrifice on g7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0m0Z Z0lrZ0ok pZ0ZpZ0m ZpZ0ZpZP 0Z0ZNZ0Z ONZBZPS0 0OPL0Z0Z Z0J0Z0S0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
919 8 7 6 5 4 3 2 1
922
0Z0s0snj opZnZ0Zp 0lpZ0opZ Z0Z0ZNL0 0Z0ZPZ0Z ZBZRZ0Z0 PO0Z0OPO Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0arZ0Z0j opZ0Z0op 0Z0Z0Z0Z Z0m0l0Zb PZ0Z0Z0Z Z0Z0Z0OP 0O0MnOBJ S0A0MQZ0 a
920 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
924
0Zrs0Z0Z ZpZ0Z0j0 pZ0Z0lpZ Obo0MpZ0 0Z0Z0O0Z Z0Z0S0L0 0Z0Z0ZPJ Z0S0Z0Z0 a
c
rZbZ0skZ opZ0Z0ap 0ZpZ0ZpZ Z0Z0l0Zn NLPZ0Z0O ZPZ0ZNZn PZ0ZPOBZ Z0ARSKZ0
921 8
b
923
0ZrZ0skZ opZ0LpZp 0Z0o0ZpZ Z0Z0Z0Zn 0ZPZ0Z0Z ZPM0Z0Oq PZ0ZPO0Z Z0S0ZRJ0 a
Sacrifice on g6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0ZnZkZ o0sbopZp 0Z0o0ZpO Z0lPZ0O0 0ZPLBS0Z Z0S0O0Z0 0Z0ZNO0Z Z0Z0ZKZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
925 8 7 6 5 4 3 2 1
928
rZ0Zra0j opo0l0op 0Z0Z0Z0Z Z0ZPZ0L0 0Z0Z0M0Z ZPZ0Z0OB PZ0ZbZ0O A0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0s0Z0s o0o0ZpZk 0obZpOpZ Z0Z0O0Z0 0ZPZ0ZQZ Z0ZBZ0Z0 PO0Z0J0O Z0Z0Z0Z0 a
926 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
930
0Z0ZrZ0j o0ZQZ0Zp 0ZpZrZpZ Z0Z0MpS0 0Z0O0Z0Z Z0O0OPZb PZ0Z0l0O Z0Z0Z0SK a
c
0lrZbZkZ Z0s0Zpa0 pZ0ZpZpZ Z0ZnO0M0 0m0ZBZ0L M0Z0Z0Z0 0O0A0OPZ S0Z0ZRJ0
927 8
b
929
bZ0Z0Z0s Z0l0ZkZ0 0Z0ZpOpZ ZpZnZ0Ap 0ZpOBZPO Z0O0ZQZ0 0Z0Z0O0Z Z0Z0S0J0 a
Sacrifice on g6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0s0j ZpZ0ZpZp 0Z0m0O0Z ZpZpM0ZQ 0Z0A0Z0Z ZPZ0Z0Z0 PZ0Z0ZPO S0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
931 8 7 6 5 4 3 2 1
934
0Z0Z0skZ Z0ZbZ0ap 0o0o0ZpZ o0oPl0Zn PZPZBZ0Z Z0M0A0O0 0O0L0Z0O S0Z0Z0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZqZrZ0Z Z0Z0ako0 0Z0onZpZ o0ZBZ0Z0 0obAPZ0Z Z0Z0ZPZQ POPZ0Z0Z Z0J0Z0SR a
932 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
936
rZ0snZkZ Zbl0apZp pZ0Z0ZpZ Z0ZpZ0Z0 0Z0A0O0Z O0MBZ0ZQ 0OPZ0ZPO Z0Z0SRZK a
c
rZbZ0skZ opZnapmp 0Z0Z0ZpA l0Z0o0Z0 0ZBZ0ZRZ Z0M0ONZ0 POQZ0OPO ZKZ0Z0ZR
933 8
b
935
rZ0Z0Zns Zbl0oka0 pm0Z0Zpo ZpZ0opZ0 0Z0Z0Z0M O0MQZ0A0 0OPZBOPO S0Z0S0J0 a
Sacrifice on g6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZrZ0ZkZ ZpZ0apZ0 pZbopZpZ l0Z0mPZQ 0ZBAPZ0o Z0M0Z0Z0 POPZ0Z0Z Z0J0Z0SR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
937 8 7 6 5 4 3 2 1
940
0s0Z0ZnZ Zqmbo0ak pZ0o0Zpo Z0oPO0Z0 0ZPZ0Z0Z Z0MBA0O0 Rs0LNZ0O Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0j0Z ZbZ0Zpop 0l0ZpZ0Z Zps0ZnZ0 0SPZ0Z0Z Z0ZQZPZ0 0ZPM0ZPO S0Z0Z0ZK a
938 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
942
0ZbZranj s0Z0ZqZp 0o0Zpo0Z o0ZpZ0ZP PZpO0ZNM Z0O0ZQO0 0OBZ0O0Z S0Z0S0J0 a
c
0Z0Z0s0Z Z0Z0Zpj0 qs0ZPapo opoBL0Z0 0Z0Z0Z0Z Z0Z0O0S0 PO0Z0O0O Z0Z0Z0SK
939 8
b
941
rZblrZkZ opZ0Zpop 0ZnZ0a0Z Z0opZ0Z0 0Z0OnZ0Z Z0M0ANOP PO0ZPOBJ Z0SQZRZ0 a
Sacrifice on g6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZkZ0s ZpZ0lpo0 pZpZ0Z0Z Z0a0o0Zn 0ZBZPZbo Z0M0APZ0 POPZQZPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
943 8 7 6 5 4 3 2 1
946
0a0Z0ZkZ ZpmqZrZp 0Z0ZpZpZ ZpOpO0ZQ 0O0Z0Z0A Z0ZBOPZ0 0Z0Z0Z0O Z0Z0Z0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0Z0Z0Z opZbZpj0 0l0o0mpo Z0oPZ0Z0 0ZPZ0Z0Z Z0LBSNZP PO0Z0OPZ Z0Z0Z0J0 a
944 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
948
0Z0s0skZ ZqZ0ZpZp pZ0Z0LpZ Z0Z0O0Z0 0ZBZNZ0S O0Z0Z0OP 0Z0o0ZPJ Z0Z0Z0Z0 a
c
rZ0Z0Z0Z ZbZ0Zpj0 0ZpZrmpo ZpZ0M0Z0 0l0OBL0Z Z0Z0S0Z0 0Z0Z0OPO Z0Z0ZRJ0
945 8
b
947
0ZrZrZkZ ZbZ0apZ0 plpZpo0o ZpZ0M0Z0 PZ0O0Z0Z Z0ZBO0Z0 0OQZ0OPO Z0S0ZRJ0 a
Sacrifice on g6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0Z0s obl0Z0o0 0o0Zpo0Z Z0a0Z0Zn 0ZPZBZ0Z ZPZNZ0Op PA0ZQO0O S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
949 8 7 6 5 4 3 2 1
952
0Z0srakZ Zbl0ZpZp pZ0ZpOpZ Zpo0o0O0 0ZPZPZ0M ZPZPZ0L0 PZ0Z0SBO Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0s0j ZpZ0s0op pZnl0a0Z Z0MpZ0Z0 0O0OnZ0Z OQZRZBO0 0A0Z0O0Z Z0Z0ZRJ0 a
950 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
954
0Zrl0ZrZ ZpZ0Zpj0 pmbo0ZpS Z0Z0o0Z0 0Z0MPZ0Z ZPM0LPZ0 PO0Z0ZPZ ZKZ0Z0ZR a
c
rZbZka0s Z0o0ZpZ0 0ZpZ0ZpZ o0mpO0Zp 0ZPZ0Z0O OqZBANL0 0O0Z0OPZ S0Z0ZRZK
951 8
b
953
rZ0Z0skZ o0oqZ0Zp 0o0mbopL m0Z0Z0Z0 0Z0Z0Z0Z A0OBZNZ0 PZPZ0OPO Z0ZRS0J0 a
Sacrifice on g6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0ZkZ ZbZ0ZpZ0 0Z0ZpZpZ Z0ZpS0Zp 0Z0O0Z0Z ZPZ0ZQOP 0Z0Z0OKZ ZBl0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
955 8 7 6 5 4 3 2 1
958
0Z0ZrZkZ S0m0Zpo0 0Zpa0Z0Z ZpZ0ZbZ0 0Z0O0Z0Z ZBO0M0Oq 0O0Z0Z0O Z0AQZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZbZ0skZ Z0Zqm0Zp 0o0o0Zpa Z0oPo0Zn 0OPZPZ0Z A0MBZ0O0 0Z0M0Z0O Z0ZQS0J0 a
956 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
960
rZ0Z0ZkZ o0ZqZrZp 0Z0o0mpa ZpZPo0Zn 0Z0ZPZ0Z M0ABZ0O0 PO0Z0Z0O S0ZQS0J0 a
c
0a0Z0ZkZ ZpZbZpZ0 0m0Z0Zpo ZNZpZ0Zn 0O0Z0ZqZ M0Z0Z0O0 PZ0Z0ZBO Z0ZRL0ZK
957 8
b
959
0Z0Z0skZ o0Z0Z0o0 bopaps0l Z0ZpZ0Z0 POPOpZ0Z Z0Z0O0O0 0ZRZ0OBZ Z0SQA0J0 a
Sacrifice on g6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0lrZkZ opo0ZpZ0 0Z0o0ZpL Z0ZbZ0Zp 0ZPZPZ0Z Z0Z0ZPZ0 PO0ZBZ0O S0Z0Z0SK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
961 8 7 6 5 4 3 2 1
964
rZ0ZkZrZ ZbZ0lpZ0 pZ0o0Z0Z ZpZ0aPZp 0Z0ZpZ0O M0O0Z0O0 PO0Z0OBZ S0ZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0s0j ZplbZ0op pZnapsnZ Z0ZpZ0Z0 0Z0O0Z0Z Z0M0ANOP PO0Z0OBZ Z0SQS0J0 a
962 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
966
rZbZ0ZkZ opZ0Z0Zp 0lnZpLpa Z0ZpZ0Z0 0Z0Z0Z0Z Z0ZBZNZ0 PO0Z0OPO Z0S0ZRJ0 a
c
rZbZkZ0s opZ0ZpZ0 0ZnZpOpo l0ZpZ0Z0 0Z0O0L0Z ZRZ0ZNZ0 PZBZ0OPO S0Z0Z0J0
963 8
b
965
0ZkZ0Zrs ZplbZpZ0 pZ0apL0Z Z0Z0Z0Z0 0Z0Z0Z0Z ZNO0ZBO0 PO0ZRZ0O S0Z0Z0J0 a
Sacrifice on g6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZka0Z o0ZnZpZ0 0Z0ZpZpZ l0ZpO0Z0 0m0O0OPZ Z0ZBZNZ0 PZ0ZNJ0Z S0A0Z0ZQ a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
967 8 7 6 5 4 3 2 1
970
rZbZrmkZ oplnZ0Zp 0Z0apopZ Z0ZpM0MQ 0Z0O0Z0Z Z0oBZ0Z0 PO0Z0OPO S0A0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0Z0Z0ZkZ S0Z0ZpZ0 0Z0Z0Z0o o0ZPS0oq bZ0L0Z0Z OrZ0Z0O0 0Z0Z0OKO Z0s0Z0Z0 a
968 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
972
rZ0Z0ZkZ ZbZpZ0op no0ZpZrZ ZNa0ZpZ0 0OPZ0Z0l O0Z0OPO0 0ZQABZ0O S0Z0ZRJ0 a
c
0Z0Z0skZ ZbZ0Z0Zp 0Z0aqZ0Z Z0opZ0o0 pZ0Z0Z0Z O0L0OpOP 0O0Z0J0Z Z0ARZBZ0
969 8
b
971
0Z0Z0skZ o0Z0Z0ap 0Z0Z0ZpZ oRZNZ0Z0 0ZPoRZqZ Z0Z0ZrO0 0Z0Z0O0Z ZQZ0Z0J0 a
Sacrifice on g6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ Z0oRZpZp plNZ0OpZ Zpm0Z0Z0 0Z0ZQZ0Z Z0Z0O0Z0 PO0Z0ZPO Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
973 8 7 6 5 4 3 2 1
976
rZ0lkZ0s opZ0Zpop 0mnZ0Z0Z Z0opO0M0 0aPZ0Z0Z Z0MQZ0Z0 PO0Z0ZPO S0A0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rm0ZrZkZ opZ0ZpZp 0Z0O0ZpZ Z0o0abA0 0ZBZ0Z0Z Z0M0Z0Z0 Pl0Z0ZPO S0ZQZRJ0 a
974 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
978
rZbZ0skZ lpZ0Zpop pLpZ0Z0Z Z0Z0o0Z0 0ZBZPZ0Z Z0ZRZ0Z0 POPZ0OPO Z0ZRZ0J0 a
c
rZ0ZrZkZ obl0apZp 0onZ0ZpA Z0ZBZ0Z0 0Z0Z0Z0Z O0O0ZNZ0 0Z0ZQOPO Z0ZRZRJ0
975 8
b
977
rZqZ0ZkZ Z0Z0Zpo0 pZ0Z0m0o Z0s0oQZ0 0o0ZPZPZ ZBZ0Z0ZP POPZ0Z0Z ZKZRZRZ0 a
Sacrifice on f7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0ZkZ obl0mpZp 0o0a0ApZ Z0Z0Z0Z0 0Z0Z0ZQO Z0O0ZNZ0 BZ0Z0OPZ Z0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
979 8 7 6 5 4 3 2 1
982
rZ0l0j0s Zbo0apZ0 pZ0Z0Zpo ZpZ0S0Z0 0Z0O0Z0Z ZBO0Z0ZQ PO0Z0OnO SNA0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZ0ZrZkZ Z0Z0Zpap pZ0Z0ZpZ Z0Z0O0Z0 0ABZQOnZ Z0Z0Z0Z0 0lPJ0ZPO Z0ZRZ0ZR a
980 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
984
rZrZ0ZkZ ZblnapZp pZ0o0ZpL ZpZ0o0O0 0Z0APZ0Z ZBMRZ0Z0 POPZ0O0O Z0J0Z0S0 a
c
0ZrZrZ0Z obl0apj0 0onZ0ZpZ Z0Z0Z0Ap 0Z0ZQZ0Z OBZ0ZNZ0 0O0Z0OPO S0Z0S0J0
981 8
b
983
0sbl0ZkZ o0Z0Zpa0 0Z0O0Zpo Z0o0Z0Z0 0ZBZ0Z0Z Z0Z0ZNZP PZ0L0OPZ Z0Z0S0J0 a
Sacrifice on f7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0lkZ0s obo0ZpZ0 0o0Z0opa Z0Z0Z0Zp 0ZBO0M0O Z0M0O0Z0 PO0Z0OPZ S0ZQJ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
985 8 7 6 5 4 3 2 1
988
0ZrZ0ZkZ lbZ0Zpap pZ0Z0ZpZ Z0Z0Z0Z0 0ZBZ0Z0Z Z0MQmPZ0 PO0Z0ZPO Z0SRZ0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
rZbZkZ0s oplnZpap 0ZpZ0mpZ Z0Z0o0Z0 0ZBOPZ0Z Z0M0ANZ0 POPZQZPO ZRZ0J0ZR a
986 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
990
rZ0s0ZkZ Zbl0mpop 0o0Z0m0Z o0oBZNZ0 0Z0ZPZ0Z O0Z0LNZ0 0O0Z0OPO Z0SRZ0J0 a
c
0Zrs0akZ Z0Z0Zpop 0l0Z0Z0Z ZpZBZ0S0 0m0Z0Z0Z Z0ZQZ0O0 0A0ZPO0O Z0Z0ZRJ0
987 8
b
989
rZ0ZrZkZ ZblnZpop 0opZ0o0Z Z0Z0Z0Z0 0Z0O0Z0Z ZBZ0Z0M0 PO0Z0OPO S0ZQS0J0 a
Sacrifice on f7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZnZkZ ZbZqZpZp 0Z0O0ZpZ Z0Z0Z0A0 rZ0o0Z0Z Z0Z0Z0ZP BZ0L0OPZ S0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
991 8 7 6 5 4 3 2 1
994
rZ0ZrakZ obZnZpo0 0opZ0Z0o Z0Z0ZNl0 0ZBO0Z0M O0Z0Z0Z0 0OQZ0OPO Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
0ZbZrZ0Z s0ZnZpj0 pZ0A0Z0o lpZBZ0o0 nSpO0Z0Z Z0O0O0Z0 RZQZ0OPO ZNZ0Z0J0 a
992 8 7 6 5 4 3 2 1
b
c
d
e
f
g
8
7 6 5 4 3 2 1
7 6 5 4 3 2 1
h
b
d
e
f
g
h
a
b
c
d
e
f
g
h
996
0ZrlrZkZ opZbZpop 0Z0Z0Z0Z ZNaBZ0Z0 0m0Z0A0Z Z0Z0Z0O0 PO0ZPO0O Z0SQZRJ0 a
c
0Zrs0ZkZ Z0Zbapo0 0m0Z0Z0o ZqoBZ0Z0 0Z0Z0M0Z Z0Z0O0A0 0Z0Z0OPO ZQSRZ0J0
993 8
b
995
rZ0ZrZkZ ZblnapZp pZ0o0ZpZ m0Z0oNZQ PZ0ZPZ0Z A0OpZ0Z0 BZ0M0OPO S0Z0S0J0 a
Sacrifice on f7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0ZkZ oRZbZpaN 0ZnZ0ZpZ Z0l0Z0A0 0ZBoPZ0Z Z0Z0ZPZ0 0Z0Z0ZPZ Z0ZQZKZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
997 8 7 6 5 4 3 2 1
1000
rZbZkZ0s onZpZpZ0 0o0Z0Z0o Z0o0M0Z0 0ZPZ0Z0o l0O0O0Z0 PZQZ0OPZ Z0ZRJBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1002
0ZrlrakZ obZnZpZp 0o0ZpmpZ Z0Z0M0Z0 0ZBO0M0Z ZPZ0L0Z0 PA0Z0OPO Z0ZRZRJ0 a
c
rl0s0j0Z ZbZ0mpoB po0opZ0o Z0m0O0M0 0ZPZ0Z0Z APZ0Z0Z0 PZ0L0OPO Z0S0S0J0 a
999 8
b
1001
rm0l0ZkZ opZ0Zpa0 0Z0o0Zpo Z0oPZ0M0 0Z0s0O0Z Z0Z0Z0ZQ PO0Z0ZPO S0A0ZRJ0 a
0Zrs0ZkZ Zbl0apop pZnZpm0Z ZpZ0M0Z0 0O0ZPZ0Z O0ZBZNZ0 0A0ZQOPO Z0S0ZRJ0 a
998 8
Sacrifice on f7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0j0s ZpZ0apo0 0mpZpm0o Z0Z0M0ZN pZPO0A0O O0Z0Z0ZR 0O0ZQOPZ ZKZ0S0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1003 8 7 6 5 4 3 2 1
1006
rZ0Zka0s ZbZnZpop plpZpZ0Z Z0ZnO0M0 Po0ONZ0Z ZPo0Z0Z0 0ZQZBOPO S0A0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1008
rZbs0ZkZ Zplnopa0 pZnZ0Zpo Z0o0O0M0 0Z0ZBO0Z M0O0A0Z0 PO0Z0LPO S0Z0ZRJ0 a
c
0sblrZkZ o0o0ZpZ0 0o0opo0o m0Z0M0Z0 0ZPO0ZPO Z0OQZ0Z0 PZ0ZPOBZ S0Z0J0ZR a
1005 8
b
1007
rZ0snj0Z ZpZ0opZ0 0m0l0ZpZ o0ZPMbZp PZ0a0Z0Z ZBM0Z0ZP 0O0AQOPZ S0Z0S0J0 a
rZbZkZrZ ZpZ0apZ0 pZ0opmnZ l0Z0Z0M0 0Z0ZPZ0A Z0M0Z0L0 POPZBZPO Z0JRZRZ0 a
1004 8
Sacrifice on f7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZnlrZkZ Zbo0ZpZ0 pZ0Z0apo ZpZpM0Z0 0Z0O0Z0Z Z0MQO0Z0 POBZ0OPO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1009 8 7 6 5 4 3 2 1
1012
rZ0lrakZ Z0ZnZpo0 pZ0Z0Z0o ZpopONM0 0m0O0Z0Z ZPZ0Z0ZP 0O0Z0OPZ S0AQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1014
rZ0ZrZkZ Z0Z0ZpOp pZpZ0ZnZ Z0Zpl0O0 0Z0Z0Z0Z ZPZBZ0ZQ PZ0Z0Z0O Z0ZRZRZK a
c
rm0s0akZ ZbZnZpop pl0ZpZ0A ZpZ0O0Z0 0Z0M0ZQZ ZBM0Z0Z0 POPZ0ZPO Z0ZRZRJ0 a
1011 8
b
1013
rZ0s0ZkZ oqZ0apo0 0ZbZ0mno Z0opZQM0 0Z0Z0Z0O O0M0OBA0 0O0S0OPZ Z0ZRZ0J0 a
rZrZ0ZkZ Z0lnapZp pZ0ZpZpL ZpZbO0Z0 0Z0Z0Z0Z ZNZBZ0Z0 POPA0ZPO Z0Z0SRJ0 a
1010 8
Sacrifice on f7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
bZrlrZkZ Z0Z0ZpZp pZ0ZpZpA ZpZ0O0Z0 0a0M0ZRZ Z0ZQZ0Z0 PZBZ0ZPO Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1015 8 7 6 5 4 3 2 1
1018
0ZrZkZrZ oRZ0ZpZ0 0ZbZpZ0Z l0ZpOnZ0 0Z0Z0O0Z O0oBZQZ0 0ZPZ0ZPO Z0A0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1020
rZbZrZkZ Z0lnZpap pono0Z0Z Z0Z0Z0Z0 PZ0SPZ0Z Z0M0Z0L0 0OPZBZPO Z0Z0ZRAK a
c
rm0l0skZ ZbZ0apop pZ0ZpZ0Z Zpm0O0ZQ 0Z0M0Z0Z ZBM0A0Z0 POPZ0ZPO S0Z0ZRJ0 a
1017 8
b
1019
rZ0Zka0s o0S0Zpo0 0lpZpZ0Z Z0ZpOnAp 0ZnO0L0O Z0Z0ZNM0 PZPZ0OPZ S0Z0Z0J0 a
rZblrakZ ZpZnZpop pZno0Z0Z Z0Z0ZpOQ 0Z0MPZ0O Z0M0A0Z0 POPZ0Z0Z Z0JRZBZR a
1016 8
Sacrifice on f7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0skZ ZpZbZpop 0l0Z0a0Z o0ZpZ0Z0 0Z0MnZnZ O0ZQZNOP 0O0APOBZ Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1021 8 7 6 5 4 3 2 1
1024
0ZrZ0skZ Z0Z0Zpap 0Z0Z0mpZ ZqoPZ0M0 0Z0Z0A0Z Z0Z0Z0ZQ 0Z0Z0OPO Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1026
rZblrZkZ opZnZpop 0Z0Z0a0Z Z0Z0M0A0 0Z0o0Z0O Z0Z0Z0Z0 POPL0OPZ Z0J0SBZR a
c
0s0lkZ0s ZbanZpop po0Zpm0Z Z0o0Z0M0 PZ0ZNZ0Z ZQZPZ0O0 0O0ZPOBO S0A0J0ZR a
1023 8
b
1025
0s0ZrZkZ o0Z0l0op 0ZpZ0o0Z Z0OpZ0Zb PZ0AnZnZ Z0Z0Z0O0 0Z0MPOBO Z0SQS0J0 a
0ZrskZ0Z ZplbZpoB pZnmpZNZ Z0Z0o0O0 0Z0Z0Z0Z O0M0Z0Z0 0OPZ0LPO Z0Z0SRZK a
1022 8
Sacrifice on f7
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZkZ Z0Z0ZpZ0 rZ0Z0apZ ZqZpZ0Zp 0o0OnZ0Z ZPZ0Z0ZP 0ARZNOPZ ZQZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1027 8 7 6 5 4 3 2 1
1030
rZ0Z0skZ opZ0Zpop 0Z0ZpZ0Z l0abO0A0 0Z0Z0L0O Z0M0Z0Z0 POPZ0ZPZ Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1032
rZ0ZqskZ Zpobapo0 0Z0ZpZ0o o0Z0O0ZQ 0Z0ZNZ0Z Z0O0Z0Z0 BO0Z0OPO Z0ZRJ0ZR a
c
rZ0ZrZkZ Z0O0lpop 0o0ZnZ0Z Z0Z0ZQZ0 0Z0Z0ZNZ aPA0Z0O0 0Z0Z0OKO Z0S0S0Z0 a
1029 8
b
1031
0ZrZrZ0j ZqZ0Zpop pZ0SpZ0Z Z0o0O0Z0 0Z0Z0ZQA o0Z0O0Z0 bO0Z0OPO Z0ZRZ0J0 a
rZblkZ0s opZnZpop 0Z0Z0Z0Z ZBZNOpZ0 0Z0A0Z0a ORZ0Z0Z0 0ZPL0ZPO Z0ZKZ0ZR a
1028 8
Sacrifice on f6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0skZ Z0Z0Zpop pa0ZqZ0Z Zpo0O0ZQ 0Z0sNZ0Z Z0ZRZ0Z0 PO0Z0OPO Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1033 8 7 6 5 4 3 2 1
1036
rZ0ZrmkZ ZnZblpo0 0o0ZpZ0o oPo0O0Z0 PZPZNZ0O Z0LBZ0A0 0Z0Z0OPZ S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1038
rZqZ0skZ opZ0Zpop 0a0Z0Z0Z Z0ZPZ0A0 0ZpmNZ0Z O0Z0Z0O0 0O0Z0OBO Z0ZQZRJ0 a
c
rZbZrmkZ Z0Z0a0op plpZpZ0m Zpo0O0Z0 0Z0ZNZ0Z ZPZ0ZNZP PAQZBOPZ Z0ZRS0J0 a
1035 8
b
1037
rl0ZrZkZ a0o0mpo0 pZ0ZbZ0o ZpZNo0Z0 0O0ZPZ0M ZBO0Z0ZP PZ0ZQOPZ Z0ZRZRJ0 a
rZqZrakZ Z0opZpop pZbZ0Z0Z ZpZNO0Z0 0Z0L0Z0Z Z0ZRZ0A0 POPZ0OPO Z0Z0ZRJ0 a
1034 8
Sacrifice on f6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0srZkZ Z0Z0Zpo0 po0Z0Z0Z Z0Z0ZnOQ Pm0ZBZNZ Z0Z0Z0l0 0OPZ0Z0Z Z0Z0S0SK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1039 8 7 6 5 4 3 2 1
1042
0ZrZnskZ Z0l0apop 0ZbZpZ0Z Z0ZpO0Z0 0o0ANO0Z Z0Z0ZBZQ 0OPZ0ZPO Z0Z0SRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1044
rZ0l0skZ Znm0apo0 pZ0Z0Z0o ZpopO0A0 0Z0ZNZ0Z Z0O0ZNZP POQZ0OPZ Z0ZRS0J0 a
c
0ZrZbZkZ Z0Zqapop pA0ZpZ0Z OpZ0O0O0 0m0oNO0Z Z0ZPZRZ0 0OrZ0ZBO S0Z0L0ZK a
1041 8
b
1043
rZbl0skZ Z0Z0Zpop 0Z0o0Z0Z Z0ZNmPO0 po0Z0Z0Z ZNZRZ0ZQ POPZ0Z0O Z0J0Z0S0 a
rs0Z0akm ZqZ0Z0o0 pZpo0Z0Z Z0Z0o0O0 0ZbZNZ0O ZPM0AQZ0 PZ0Z0O0Z Z0JRZ0ZR a
1040 8
Sacrifice on f6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ opZnZpo0 0m0ZpZ0o Z0o0O0Z0 0ZPONZ0Z Z0OQZ0Z0 PZ0Z0ZPO S0A0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1045 8 7 6 5 4 3 2 1
1048
rZ0Z0skZ oboqZpop 0o0ZpZ0Z Z0Z0Z0Z0 0a0ONZ0Z Z0ZBZ0Z0 POPZQOPO Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1050
rZbZ0skZ Z0Z0apop nlpZpZ0Z opo0O0Z0 0ZPZNZ0Z OPZPZNZ0 0A0Z0OPO S0ZQZRJ0 a
c
rZbZ0skZ o0Z0Zpop 0l0ZpZ0Z ZpZ0m0Z0 0Z0SNZQZ ZBZ0Z0Z0 POPZ0ZPO Z0J0Z0ZR a
1047 8
b
1049
rZrZ0mkZ Z0l0apop bZnZpZ0Z o0opO0Z0 0o0Z0ANO O0OPZNO0 0O0ZQOBZ S0Z0S0J0 a
rZ0Z0akZ obl0Zpo0 0onZpZ0o Z0Z0Z0Z0 0Z0ZNZ0Z ZPZ0O0O0 PA0ZQOBO Z0ZRZ0J0 a
1046 8
Sacrifice on f6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0lnZ0skZ s0Z0Zpop pobZnZ0Z Z0ZNoNZ0 0ZPZPZ0Z ZPZ0L0Z0 PZ0SBZPO Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1051 8 7 6 5 4 3 2 1
1054
rm0s0akZ ZqZ0Zpop 0ZbopZ0Z ZpZNZ0O0 0O0APO0Z Z0Z0ZQZP 0ZPZ0ZBZ Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1056
0Zrs0akZ Zbl0Zpop pZnZ0Z0Z Zpo0oPZ0 PZ0oPZNZ ZPZPZ0Z0 0ZPAQZPO S0Z0MRJ0 a
c
rZbZ0s0j Z0Z0Zpop 0l0ZpZ0Z Z0ZpOnOQ pZnO0ANZ O0o0Z0OB 0ZPZ0O0Z S0Z0S0J0 a
1053 8
b
1055
rlbm0skZ ZpZ0Zpop pZ0ZpZ0Z Z0Z0Z0Z0 0Z0ZNO0Z Z0Z0Z0Z0 POPZBLPO ZKZRZ0ZR a
rZ0l0skZ o0o0Zpop 0ZbZ0Z0Z ZpaNO0Z0 0ZpZ0Z0Z Z0Z0ZNZ0 POPL0OPO Z0ZRS0J0 a
1052 8
Sacrifice on f6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZRZ0a0Z oQZ0Z0Zp 0Zps0Z0j Z0Z0ZpZ0 NZ0Z0Z0m ZPZ0Z0ZP PZ0Z0OPZ l0Z0ZBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1057 8 7 6 5 4 3 2 1
1060
rZ0Z0s0j o0o0Z0ap 0Zpo0ZpZ Z0Z0mbZ0 NZPZ0Z0l ZPZ0Z0ZP PANL0OPZ S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1062
rZbZ0skZ Z0Z0lpa0 pZ0o0Z0o Z0oPm0Z0 PoNZ0O0Z Z0ZBZ0Z0 0O0Z0ZPZ SNZQS0J0 a
c
rZ0Z0skZ opZ0lpop 0Zpa0mbZ Z0Z0m0Z0 0ZPZpZ0Z ZPM0O0ZP PAQSBOPZ Z0ZRZNJ0 a
1059 8
b
1061
0Zbl0s0j Zpo0Z0ap rZ0Z0Z0Z o0Z0opZ0 0ZPO0Zpm O0M0O0Z0 0AQZ0OPO Z0ZRSBJ0 a
0sbZ0skZ Z0Zqopap pZpo0ZpZ A0Z0m0Z0 0Z0ZPZ0Z ZBZ0M0ZP POPZ0OPZ S0Z0LRJ0 a
1058 8
Sacrifice on f6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0ZkZ Z0ZqZpop rZ0Z0Z0Z O0ZpZ0Z0 QZpm0Z0Z Z0Z0Z0Z0 RO0A0OPO Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1063 8 7 6 5 4 3 2 1
1066
0Z0ZrakZ Z0ZqZpo0 0Z0o0m0o ZpZPm0Z0 0OrZ0Z0Z ZQM0M0ZP 0Z0A0OPZ S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1068
rZ0ZrZkZ o0Z0ZpZ0 0Z0a0ZpZ S0oPl0Z0 0ZPZpZbo Z0M0O0Z0 0ZQZ0OPO S0Z0ZNJ0 a
c
rZbZ0s0Z opZ0l0j0 0Z0o0Zpo ZNo0o0a0 0ZPmPZ0Z Z0MQZ0Z0 PO0Z0OPO ZBZRZRJ0 a
1065 8
b
1067
0arZ0skZ ZbZ0l0o0 pZ0ZpZ0Z ZpZ0ZpZ0 0O0L0Z0Z O0M0O0ZP 0A0Z0OPZ Z0ZRZRJ0 a
rZ0Z0Z0Z opZ0Zpok 0mpZrZ0o Z0Z0O0Z0 0ZqZPO0A Z0O0Z0ZR 0Z0L0ZPO Z0Z0S0ZK a
1064 8
Sacrifice on f6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0s0Z0Z l0Z0mpjp 0o0obopZ Z0o0Z0Z0 0ZPZNZ0Z ORZPO0OP 0Z0Z0OBJ Z0ZQZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1069 8 7 6 5 4 3 2 1
1072
0s0ZrZ0j opZ0Mpap 0Z0lbZpZ Z0Z0Z0L0 0Z0Z0O0Z Z0A0ZPZ0 PO0Z0S0O Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1074
0Z0Z0jnL Zbl0Z0o0 papZ0o0Z ZpZ0oPZ0 0Z0ZPZNZ Z0Z0ZBZ0 POrZ0Z0O S0Z0ZRZK a
c
0Z0Z0s0s o0j0Z0Z0 QZpZpZ0Z Z0apl0o0 0Z0Z0ZnZ Z0Z0ZPZ0 POPA0ZKO S0Z0ZNZR a
1071 8
b
1073
rZbZ0ZkZ opZ0Zpop 0Zns0Z0Z Z0o0ZqZ0 QZPZnZ0Z O0Z0ONZ0 BA0Z0ZPO Z0ZRS0J0 a
rZ0Zqs0j opZ0Zpap 0Zpm0Z0Z Z0Z0Z0ZQ 0Z0oPZ0Z Z0MBZ0ZP POPZ0ZPZ S0Z0ZRJ0 a
1070 8
Sacrifice on f6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0skZ opZqZrZp 0Zno0ZpZ Z0ZNo0Z0 0OPm0ZbZ Z0ZBZPZ0 PA0Z0ZPO Z0SQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1075 8 7 6 5 4 3 2 1
1078
0Z0Z0Zrj opZ0ZRZp 0Z0Z0O0o Z0mpZ0Z0 0ZPLpl0Z Z0O0Z0sP PZBZ0ZPZ Z0Z0Z0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1080
0Z0Z0s0Z ZpZ0Z0ok 0a0Z0ZrZ oQZ0o0Zp 0Z0ZPZ0l Z0Z0ZPZP PZRZ0ZPJ ZRZ0ZNZ0 a
c
0Z0ZrZkZ Z0m0ZpZp pZ0L0ZpZ Z0Z0Z0Z0 NZ0o0Obl Z0ZpZ0Z0 0O0Z0ZPO S0A0ZRZK a
1077 8
b
1079
rZ0l0skZ ZpZbapop pZnZpZ0Z Z0o0O0ZQ 0Z0ZNZ0Z Z0Z0Z0O0 POPA0OBO Z0ZRS0J0 a
0Z0Z0skZ Z0ZrZpo0 0mqZpZ0o opZ0Z0Z0 0ZpONZ0Z O0O0S0Z0 0OQZ0OPO Z0Z0S0J0 a
1076 8
Sacrifice on f6
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ Zpl0Zpo0 pZ0oba0o O0Z0m0Z0 0Z0MPZ0Z Z0M0Z0Z0 0OPZBZPO S0ZQZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1081 8 7 6 5 4 3 2 1
1084
rZ0Z0skZ ZbZnZpa0 0Z0o0ZpZ ZpZPl0Ap 0ZpZPZ0Z Z0O0ZRMP 0OBL0ZPZ Z0Z0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1086
rm0l0s0Z obZ0opZk 0o0o0ZpZ Z0ZPZ0Zp 0Z0L0Z0O ZPZ0ZNO0 PZ0ZPOBZ S0Z0ZRJ0 a
c
0Z0Z0s0j obZrapZ0 0ZpZpZpZ lpZ0O0Zp 0Z0Z0O0O Z0M0O0S0 POQZ0ZPZ ZBS0Z0J0 a
1083 8
b
1085
rZqZrZ0Z Zpobapj0 pZno0ZpZ Z0Z0o0o0 0Z0OPZPZ Z0O0ZNMP POBZ0O0J S0ZQZ0S0 a
rlrZ0ZkZ Z0ZnapZp pZbZpZpZ OpZpO0Z0 0m0A0OBZ ZNM0Z0Z0 0OPL0ZPO Z0Z0SRZK a
1082 8
Attack against the kingside
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rl0m0s0j obZRZpop 0o0ZpZ0Z Z0Z0O0Z0 0Z0Z0AQZ Z0O0Z0O0 PZ0Z0OBO Z0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1087 8 7 6 5 4 3 2 1
1090
0Z0Zrl0Z o0Z0m0ok 0opoQm0o Z0Z0o0Z0 0Z0OPZ0M Z0O0ARZ0 PZPZ0ZPO Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1092
rZ0l0skZ ZpZ0apo0 pZbZ0m0o Z0Z0Z0Z0 0Z0Z0A0Z Z0MBZ0Z0 PO0L0OPO Z0ZRZRJ0 a
c
0Z0srZkZ ZblnapZp popZpZpA Z0Z0Z0M0 0Z0O0Z0L Z0ZBZ0Z0 POPZ0OPO Z0ZRS0J0 a
1089 8
b
1091
rZ0Z0skZ Z0Z0apop pl0Z0Z0Z m0Z0oPZ0 Po0ZNZ0Z Z0ZRZ0ZP 0O0Z0OPZ Z0SQZBJ0 a
rm0l0s0Z obZ0Z0ak 0o0ZpZ0o Z0opO0oP 0Z0OnApZ Z0OBLNZ0 PO0M0O0Z Z0JRZ0ZR a
1088 8
Attack against the kingside
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0akZ ZbZnZpZ0 0l0Z0mpZ Z0ZpZ0Zp 0Z0M0Z0O ZPZBZ0M0 0A0L0OPZ Z0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1093 8 7 6 5 4 3 2 1
1096
0ZrlrakZ ZbZ0Zpo0 0Z0Z0Z0o mpZ0o0Z0 0ZpZNZ0Z Z0OPZRZP BO0M0OPZ S0ZQZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1098
0Z0ZrZkZ opZ0A0op 0Z0Zno0Z ZqZ0Z0Z0 bO0ZpZ0Z O0Z0M0O0 0L0ZPO0O Z0S0Z0J0 a
c
rZ0Z0skm Z0Znlpa0 bo0ZpZ0o o0Z0O0o0 PZ0ONZ0Z Z0M0A0Z0 0OBZ0SPO S0ZQZ0J0 a
1095 8
b
1097
rmqZrZ0j opZ0apZ0 0Z0ZbZBA Z0ZpO0oP 0Z0M0Z0Z Z0O0Z0Z0 PZQZ0OPZ S0Z0J0ZR a
rZqZ0skZ Z0Z0m0a0 pZ0o0m0Z Z0oPo0o0 QZPZPoPZ ZRZNZPZ0 PZ0ZBA0Z Z0Z0ZRJ0 a
1094 8
Attack against the kingside
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Zqskm ZbZpa0Z0 0ZnZpZ0o Z0Z0ZpMP roPo0APZ ZPZ0ZNZ0 0ZBL0O0Z Z0S0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1099 8 7 6 5 4 3 2 1
1102
0Z0l0skZ o0ZnZ0o0 bo0Zpo0Z m0Z0O0ZQ 0ZrZNZ0Z O0Z0Z0Z0 0A0Z0OPO Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1104
0ZrZqskZ o0Z0apZ0 bo0Z0mpZ Z0Z0M0Zp 0ZPMpZ0Z ZPZ0Z0OQ PA0Z0O0O Z0ZRZRJ0 a
c
rZ0lrakZ o0ZbZ0o0 0onZpm0o Z0ZpZ0M0 0ZpO0O0Z Z0O0Z0M0 POQZ0ZPO SBA0ZRJ0 a
1101 8
b
1103
0ZbZ0Z0Z Z0lrspZk 0Z0Z0SpZ Z0o0Z0Zp 0oBZPS0O ZPZPZ0O0 0L0Z0Z0J Z0Z0Z0Z0 a
rZ0m0skZ opoqopa0 0m0Z0Zpo Z0ZpO0M0 0Z0O0ZPZ Z0O0Z0ZQ POBZ0O0O ZRA0ZRJ0 a
1100 8
Attack against the kingside
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0ZkZ obZpZ0op 0OnZps0Z Z0Z0Zpm0 0ZPZ0Z0Z A0OBOPOq PZQM0Z0O ZRZ0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1105 8 7 6 5 4 3 2 1
1108
0Z0ZrZkZ obZnZ0op 0Z0o0ZrZ ZPo0opl0 0ZPZnZ0Z OQZ0OPZ0 0A0ZBZPO Z0ZRMRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1110
rZbZrZkZ Zpl0apop pm0Z0Z0Z Z0oBmPAQ 0Z0ZPS0M Z0M0Z0ZP PO0Z0ZPZ S0Z0Z0J0 a
c
rZ0lrZkZ opZ0Zpap 0ZpZnZpZ ZPOpZ0Zn PZ0A0Z0Z ZNZ0OPZ0 0Z0ZBO0O Z0SQZRJ0 a
1107 8
b
1109
rZ0Z0skZ opZbZpa0 0Z0ZpZnZ Z0o0Z0OQ 0Z0oBO0Z Z0ZPZ0Z0 POPZ0Z0Z Z0Z0ZRJ0 a
rZqs0ZkZ o0Z0apZp 0Z0ZpmpZ Z0o0M0A0 0o0m0Z0Z Z0MPZ0ZR POPL0OPO Z0Z0S0J0 a
1106 8
Attack against the kingside
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0s0j ZpZ0Z0Zp 0Z0obZna Z0Z0o0Z0 rMPZ0Z0Z ONZ0ZPOq 0A0ZQZ0O Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1111 8 7 6 5 4 3 2 1
1114
0Z0ZrZkZ ZpZ0lpa0 0ZpormpZ oPm0Z0Z0 0ZPZPZPZ O0Z0APZ0 0Z0ZNZBZ Z0SQS0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1116
rm0lrZkZ Zpo0Z0an pZ0o0opZ Z0Z0Z0Op 0ZPMPO0Z Z0M0ABZb PO0Z0S0O S0ZQZ0J0 a
c
rZ0a0Z0Z obZ0l0j0 no0o0ZrZ ZNZPo0ZQ PONZPo0Z Z0Z0Z0Z0 0ZRZ0APo Z0S0Z0ZK a
1113 8
b
1115
0Z0l0s0Z ZpZ0Z0j0 0O0o0ZpZ o0ZPora0 0ZNZ0Z0Z ZPZQZPO0 0Z0Z0Z0Z ZRZ0ZRZK a
rZbl0skZ oponZpa0 0Z0o0Z0Z Z0ZPo0Z0 0ZPZPZpZ Z0M0ZNA0 POQJBOnZ S0Z0Z0ZR a
1112 8
Attack against the kingside
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0ZkZ oblnZpo0 0o0Z0Z0o Z0apO0Z0 0ZPZ0Z0Z Z0ZBZNZ0 PA0ZQZPO S0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1117 8 7 6 5 4 3 2 1
1120
rZ0Z0skZ Z0l0ZpZp pZ0Zbo0Z Z0a0o0Z0 Po0Z0Z0Z ZPZQONZ0 0A0Z0OPO S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1122
rZ0ZrZkZ ZpZqZpap pZ0o0ZpZ Z0oPZbAn PZPZNOPZ Z0ZBZ0ZP 0O0L0Z0Z S0Z0S0J0 a
c
rZ0ZnskZ opZ0Z0ap 0Z0oPl0Z Z0o0ZpZQ PmPZpZ0Z S0Z0Z0MP 0O0Z0OPZ ZBA0ZRJ0 a
1119 8
b
1121
rZ0Z0j0Z o0o0spa0 0Z0o0Z0Z Z0ZPZQO0 qZpZBZ0Z Z0Z0ZRZ0 PO0Z0OPZ ZKZ0Z0ZR a
rZbZrZkZ opZ0lpa0 0Z0o0m0o Z0oPZ0o0 PmPZ0Z0Z Z0M0ANZP 0O0L0OPZ SBZ0ZKZR a
1118 8
Attack against the kingside
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rmqZ0skZ o0ZbapZ0 0ZpZ0ZpZ Z0O0O0Zp 0Z0oPO0Z O0M0Z0M0 0Z0A0ZPO S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1123 8 7 6 5 4 3 2 1
1126
0Zbl0s0Z Z0Znspak po0o0ZpZ Z0oPm0Op PZ0ZPA0O Z0M0M0Z0 0OPLBS0Z Z0Z0Z0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1128
0ZrZ0skZ ZnlnapZ0 po0o0ZpZ Z0ZQZ0Op PZ0ZPS0O APZ0Z0MB 0ZPZ0Z0Z Z0ZRZ0J0 a
c
0Z0Z0skZ ZbZ0Zpo0 pZ0Z0Z0o Z0m0o0OQ 0orZPZ0S Z0Z0Z0M0 POqZ0ZBO Z0Z0ZRZK a
1125 8
b
1127
0Z0srj0Z ZqobZpoQ nZ0Z0Z0o ZpZnO0a0 pZ0Z0Z0Z Z0Z0Z0MP PO0A0OPZ SBZ0S0J0 a
0Z0ZrZkZ ZbZrlpZn pZ0opZpZ Z0o0Z0Op 0ZPZPO0L ZPZ0Z0MR PZ0Z0ZBO Z0ZRZ0J0 a
1124 8
Attack against the kingside
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0s0j oplbZpZp 0Z0apo0Z Z0Z0Z0Z0 0ZBM0ZQZ Z0O0Z0Z0 PO0Z0OPO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1129 8 7 6 5 4 3 2 1
1132
0Z0Z0skZ Z0l0apZp 0ZbZpZpZ Z0ZpO0Z0 0OpA0O0Z Z0O0L0Z0 0ZBZ0ZPO Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1134
0ZqZ0Z0Z opZ0Z0ak 0Z0Z0Zpo MPZ0ZpZn PZ0spZ0Z Z0ZPM0Ob 0Z0ZPO0O Z0ZQS0JB a
c
0Z0ZrZkZ opZ0Zrop 0ZpZ0m0Z Z0l0Z0Z0 0ZPMpZbZ O0L0S0OP 0O0Z0OBZ S0Z0Z0J0 a
1131 8
b
1133
0Z0s0skZ o0ZbZ0ap nmpo0opZ Z0Z0o0Z0 0Z0ZPZ0L ZPZ0MPZN PZ0ZKZ0O Z0S0Z0S0 a
qZ0Z0skZ Z0mRZpo0 nZ0Z0Z0o Z0o0OQZ0 pZPZ0O0M OrZ0ONZ0 0Z0Z0J0O A0Z0Z0Z0 a
1130 8
Attack against the kingside
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ o0Z0Z0Z0 qm0Z0ZpZ Z0oPZpZp 0Z0a0O0Z Z0Z0M0Z0 POQA0ZPO S0Z0S0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1135 8 7 6 5 4 3 2 1
1138
0sbZ0skZ o0Z0opap nZPZ0ZpZ Z0ZpZ0Z0 0ZPZ0Z0Z ZqM0OPZ0 RA0Z0JPO Z0L0ZBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1140
0Z0ZnZ0j Zbo0Z0a0 pZqZ0Z0o ZpZ0m0Z0 0Z0Z0M0Z Z0O0Z0M0 PO0s0OPZ S0L0S0J0 a
c
rZqZ0a0s Z0onokop pZQZbo0Z Z0O0o0Z0 0O0Z0Z0Z Z0O0ANZ0 PZ0Z0OPO S0Z0JBZR a
1137 8
b
1139
rZ0lrZkZ obZna0op 0o0Zpm0Z Z0o0MpZ0 0ZPO0A0Z Z0ZBZNZ0 PO0ZQOPO S0Z0ZRJ0 a
rZ0Z0s0Z obm0Zpj0 0o0lpZpo Z0ZPZ0L0 BZpZPZ0Z Z0O0Z0M0 PZ0Z0OPO Z0ZRZRJ0 a
1136 8
Hunting the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZqZ0Z0s Z0o0Z0Zp kono0ZpZ o0ZbZ0Z0 PZ0Z0Z0L ZPS0ZNO0 0ZPZ0ZBO Z0J0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1141 8 7 6 5 4 3 2 1
1144
0Z0ZrZ0Z Z0Zko0Zq nabZpsRo opZpZ0ZP 0Z0O0Z0Z O0ZQZ0Z0 0O0ZNOPZ ZKSBZNZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1146
rZ0lbZns opZnZkZp 0Z0ZpZpZ ZPZpOpO0 0A0M0O0O Z0S0Z0Z0 0ZPL0Z0Z S0Z0JBZ0 a
c
0Z0Zrs0Z obZnZpZk 0o0ZPZpo Z0oPZ0Z0 0ZPZ0Znl Z0ZBZ0M0 PA0L0ZPO Z0Z0SRJ0 a
1143 8
b
1145
rZ0ZrZkZ ZpZ0Z0ap 0Z0Z0ZpZ Z0Z0Z0Z0 0o0lpZbZ O0Z0Z0O0 0OQZPOBO S0ZNJ0ZR a
rm0lrZkZ obZ0apo0 0o0ZpZno Z0o0O0MQ 0Z0oNO0O OPZBZ0O0 0APO0Z0Z Z0Z0J0ZR a
1142 8
Hunting the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Zrj opZ0ZpZp 0ZbZ0m0L Z0Z0lPZ0 0ZNo0S0O Z0Z0Z0Z0 POPS0Z0J Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1147 8 7 6 5 4 3 2 1
1150
0Zks0Z0s o0m0Z0Z0 0OpZpZ0o Z0Z0O0ZP 0ZPO0o0Z ZQZ0Z0o0 0A0Z0OPl S0ZRZKZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1152
0ZrZrZkZ o0m0Z0o0 0ZqZpopZ Z0a0Z0A0 0oPZ0Z0S ZBZ0Z0ZQ PO0Z0OPO Z0ZRZKZ0 a
c
0ZrZrZkZ opZnapo0 0Z0Zpm0o l0Z0MNZP PZpO0A0Z Z0O0Z0Z0 0OQZ0OPZ S0Z0S0J0 a
1149 8
b
1151
0sbZ0Z0s Z0lnako0 po0opm0Z Z0Z0Z0Z0 PZ0MPZ0Z Z0M0ABZ0 0OPZ0Z0O S0ZQZRJ0 a
rZ0ZrZkZ ZqZnapo0 pZbopZ0Z Z0Z0Z0O0 0o0APZ0Z Z0ZBZ0MP POPL0Z0Z ZKZRS0Z0 a
1148 8
Hunting the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrl0skZ oRZ0Z0o0 0Z0abZ0o Z0ZpZpM0 0Z0m0Z0Z O0Z0Z0ZQ 0ZPZBOPO Z0A0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1153 8 7 6 5 4 3 2 1
1156
0ZrlrZkZ o0Z0Zpap 0o0ZpZpZ Z0ZnZ0Z0 0ONO0Z0m OQZ0Z0Z0 0A0ZBOPO S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1158
rZbs0ZkZ opZ0ZpZp 0Z0Z0ZpL Z0o0Z0Z0 0Z0OqZnZ ZBO0Z0Z0 PZ0ZNOPO Z0S0ZRJ0 a
c
rZ0lrZkZ opobZpop 0anZ0Z0Z Z0Z0Z0Z0 0ZBo0Z0Z Z0M0ONZ0 PO0ZQZPO Z0JRZRZ0 a
1155 8
b
1157
rZrZ0ZkZ opZbopZp 0Z0o0ZpZ l0Z0Z0Z0 0Z0LPmPZ ZBM0ZPZ0 POPZ0Z0Z S0Z0J0ZR a
0Z0ZrskZ o0O0Zpap 0oQZ0Z0Z Z0Z0Z0l0 0Z0ZpMbZ ZBZ0O0Z0 PZ0Z0OPZ Z0S0ZRJ0 a
1154 8
Hunting the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lrZkZ Zpo0Zpap 0ZnZ0ZpZ Z0Z0obM0 PZ0O0Z0Z A0Z0O0O0 PZ0Z0OBO Z0SQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1159 8 7 6 5 4 3 2 1
1162
rZ0ZrZkZ Z0Z0ZpZp 0m0ZpZpL o0lnM0Z0 Po0Z0Z0Z ZBZ0Z0ZP 0OPZ0OPZ Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1164
rZ0lrZkZ obZ0Zpo0 0o0Z0Zno Z0oPZ0Z0 0Z0ZNZ0O Z0Z0O0O0 POQZ0ZBZ Z0ZRZRJ0 a
c
rm0Zka0s opZ0o0op 0Z0Z0Z0Z Z0oNo0M0 0Z0ZPm0Z Z0Z0ZKZ0 PO0O0OPO S0A0Z0ZR a
1161 8
b
1163
qZ0s0Zka Z0Z0ZpZp no0M0mpA Z0ZPo0Z0 0O0ZPZ0Z ZQZ0ZNOP 0Z0Z0O0Z Z0Z0SKZ0 a
rZbZrZkZ o0ZRZpZp 0ZpZpo0Z Zpl0Z0Z0 PZpZ0Z0L Z0Z0OPZ0 0O0ZBJPO Z0Z0Z0ZR a
1160 8
Hunting the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0Z0s opZ0jpop 0Z0ZpZ0Z Z0Z0Z0Z0 Qa0lPZ0Z Z0M0Z0Z0 0O0Z0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1165 8 7 6 5 4 3 2 1
1168
rZbZ0skZ opo0Z0op 0Z0a0Z0Z Z0ZPmpZ0 0ZPZ0Z0Z OQZ0O0lP 0Z0ZBZPZ S0A0ZRJN a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1170
0Z0Z0Zrs oplbZpjp 0Zpa0onZ Z0ZpZ0ZQ 0Z0O0O0M Z0ZBZRM0 PZPZ0ZPO Z0Z0ZRJ0 a
c
rm0Z0skZ obopl0op 0o0Zpa0Z Z0Z0M0ZQ 0Z0ONZ0Z Z0ZBZ0Z0 POPZ0OPO S0Z0J0ZR a
1167 8
b
1169
rZ0Z0skZ opSnZpZ0 0Z0Z0Zpa Z0O0oqZp 0Z0M0Z0Z O0LPm0Ob 0A0MPO0O Z0Z0S0JB a
0Z0s0Zrj Zpo0ZpZp pZ0oqonL Z0Z0ZNZ0 0Z0ZPZ0Z Z0Z0S0Z0 POPZ0ZPO Z0Z0ZRJ0 a
1166 8
Hunting the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZ0j oRZ0ZQop 0Z0Z0a0Z Z0opl0Z0 0Z0Z0Z0Z A0O0ZBZ0 PZPO0ZPO Z0J0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1171 8 7 6 5 4 3 2 1
1174
rZ0snZkZ ZblnZpop pZ0Z0Z0Z Z0apO0O0 0o0M0L0Z ZPZ0ZBZ0 PAPZNS0O Z0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1176
rZblkZ0s opopZNop 0Z0Z0Z0Z Z0anO0Z0 0Z0Z0Z0Z Z0Z0Z0J0 PA0Z0ZPO SNZQZ0ZR a
c
rZ0lkZ0s opo0Z0Zp 0a0o0o0m m0Z0O0M0 0ZBO0ZbA Z0M0Z0Z0 PZ0Z0OPO S0ZQZRJ0 a
1173 8
b
1175
rZ0ZkZ0s l0ZbZpZp pZpZpo0Z Z0a0Z0Z0 0ZQZ0A0Z Z0O0ZBZ0 PZPZ0OPO ZRZRZ0J0 a
rZ0Z0ZkZ opo0ZrZp 0Z0o0Z0a Z0ZPm0Z0 0m0ZPOpZ ZPZ0J0O0 PABZNZ0l S0ZQZ0ZR a
1172 8
Hunting the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0Znj ZpZqa0Zp 0Z0o0s0Z o0oPo0Z0 0ZPZPo0Z Z0Z0ZPZP PO0LNARJ Z0Z0ZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1177 8 7 6 5 4 3 2 1
1180
0ZRZ0Z0Z o0L0Z0Zp 0Z0Z0o0j Z0Z0ZPZ0 PZ0O0ZPZ Z0Z0Z0ZK 0Z0ZqZ0O Z0Z0ZrZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1182
rZ0l0ZrZ opZ0m0jp 0ZpZpo0Z Z0Z0o0ZQ 0Z0ZPZ0M Z0OPZ0Z0 PZPZ0ZPO S0Z0ZRJ0 a
c
0Z0m0skZ arZqZ0o0 0ZpZbZ0o Z0ZpZ0Z0 0ZPO0o0O O0ANZ0On 0Z0M0OBJ S0ZQZRZ0 a
1179 8
b
1181
rZ0Z0skZ oQZ0Z0op 0ZpZ0Z0l Z0ZpO0Z0 0Z0O0Z0Z Z0O0m0Z0 PZ0Z0APO S0S0Z0J0 a
rZ0l0skZ Z0Z0ZpZp 0ZpapZpZ ZbM0Z0On 0onOPZ0Z Z0Z0ANZ0 POBZ0O0O ZKZRL0ZR a
1178 8
Hunting the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZrZ Z0abZkZ0 0ZpZ0Z0Z Z0lpZpZ0 0Z0ZpO0Z ZQO0M0AP 0O0Z0Z0J Z0Z0S0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1183 8 7 6 5 4 3 2 1
1186
rZbarZkZ opZnApZp 0Z0OpZpZ l0o0M0Z0 0Z0Z0Z0Z Z0OBZ0Z0 PZPZQOPO S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1188
rZblrZkZ ZpZnapop pZnZ0Z0Z Z0ZpO0ZQ 0Z0M0O0Z ZBZ0A0Z0 POPZ0ZPO S0Z0ZRJ0 a
c
rZbl0skZ ZpZpZpop 0Z0Zpm0Z o0Z0Z0Z0 0OPZnZ0Z O0Z0Z0Z0 0ZQMPOPO S0A0JBZR a
1185 8
b
1187
rZbZ0skZ opZ0a0op 0l0ZpZ0Z Z0Zpm0Z0 0Z0Z0Z0Z O0Z0ZNM0 0O0ZBZPO S0AQJ0ZR a
rZ0Z0skZ Z0ZqZpop 0Zbonm0Z o0o0oNZ0 Po0ZPZ0Z Z0OPZQZ0 BO0A0OPO S0Z0S0J0 a
1184 8
Hunting the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Zqa0s ZbZnj0Zp pZ0Zpo0Z Z0Z0Z0AQ No0o0Z0Z Z0ZBZ0Z0 PO0Z0OPO S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1189 8 7 6 5 4 3 2 1
1192
0Z0Z0ZkZ ZpLnZ0Zp 0ZpZ0ZrZ Z0ZpZ0Z0 0Z0Z0M0l Z0Z0ZPZP PO0ZrZPZ ZRZ0ZNJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1194
0Z0Z0s0Z ZpZbl0j0 pZpa0ZpZ Z0ZPo0Zp PZBZPZ0Z Z0Z0ZNZ0 0O0Z0sPO S0L0Z0SK a
c
0ZrZ0ZkZ opl0opZp 0Z0obZpL Z0Z0Z0On 0ZrMPZ0Z Z0M0ZPZ0 POPZ0Z0Z Z0JRZ0ZR a
1191 8
b
1193
rZ0ZkZrZ opZ0ZpZp 0Z0ZpZ0Z Z0Z0m0Z0 bZqMPZ0Z Z0Z0A0ZP PZ0Z0OPZ S0L0Z0JR a
rZ0ZkZns o0Z0Z0a0 0ZqopZ0o ZQZ0m0o0 0Z0M0o0Z Z0O0Z0Z0 PO0Z0ZPO SNA0ZRJ0 a
1190 8
Annihilation of the defensive piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0sbZrakZ ZplnZpZ0 pZ0Z0Zpo Z0o0Z0Z0 0ZPZNo0Z ZPZ0O0O0 PA0L0ZBO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1195 8 7 6 5 4 3 2 1
1198
rZ0Z0skZ Z0ZblpZp pZ0opZpL Z0Z0Z0On 0o0MPZ0Z ZPM0ZPZ0 0OPZ0Z0Z Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1200
rj0m0m0s opZ0S0Zp 0ZpZ0SpZ Z0M0Z0Z0 0OPZ0ZBZ Z0Z0Z0Z0 PZ0Z0ZPO Z0Z0Z0J0 a
c
rZ0Z0ZkZ Z0lbZpa0 0Z0o0ZpZ Z0Z0o0Z0 0O0ZPZ0Z ZPZ0APZ0 0J0S0L0Z s0M0Z0ZR a
1197 8
b
1199
rZ0Zrm0Z opZ0oka0 0lpono0Z Z0Z0ZNZb 0Z0O0Z0Z Z0ZBZNL0 POPZ0ZPO S0A0S0ZK a
0Z0Z0Z0Z orZrZ0Zp 0Z0Z0ZpZ Z0o0okZ0 0Z0a0ZNZ Z0Z0Z0O0 PO0S0OKO Z0Z0S0Z0 a
1196 8
Annihilation of the defensive piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZrZ Z0Z0akZp 0Z0ZpZ0S orZpA0Z0 nZpOPM0Z Z0O0ZPZ0 KO0S0Z0Z Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1201 8 7 6 5 4 3 2 1
1204
0Z0sbZkZ ZrZ0lpa0 0Z0ZpZ0Z Z0O0M0Zp pZBO0L0Z O0Z0Z0Z0 0Z0Z0O0Z Z0ZRZ0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1206
qZrs0ZkZ o0Z0Zpop 0o0Z0ZnZ Z0oNZNZQ 0Z0a0O0Z ZPZ0Z0O0 PZ0Z0Z0O Z0ZRZRJ0 a
c
0Z0Z0ZkZ Z0ZbZ0op 0Z0Z0l0s Z0ZPZ0Z0 0ZPZBZ0O ZPZ0ZNo0 PZ0L0a0Z Z0ZRZ0ZK a
1203 8
b
1205
0sbZ0m0j Z0Z0ZrZp 0Zpo0OpL Z0Z0O0Z0 pZ0ZPZ0Z lBO0ZPZ0 PZPZNZ0Z ZKZRZ0ZR a
0s0ZrZkZ Z0Z0Zpop 0Z0o0Z0Z l0o0ZNZ0 bZBonZ0Z O0O0Z0Z0 0Z0Z0OPO Z0L0SRJ0 a
1202 8
Annihilation of the defensive piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0s0j ZnZbZqap 0oponZ0Z Z0Z0ZpZ0 0OPZ0O0Z Z0A0M0O0 0L0Z0MBO S0Z0S0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1207 8 7 6 5 4 3 2 1
1210
rZ0skm0Z opZ0a0L0 0ZpZpZ0o Z0ZqZ0Z0 0Z0ONZ0O Z0O0Z0S0 PZ0Z0OPZ Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1212
rZbl0j0s opZ0Zpop 0m0a0m0Z ZBoPo0Z0 0Z0ZPZ0M Z0M0Z0L0 PZPA0ZPO S0Z0ZRJ0 a
c
rZ0Z0skZ a0l0Zpop pZ0Z0Z0Z ZpZpZNZ0 0Z0OnO0A O0Z0Z0ZQ 0O0Z0ZPO Z0Z0SRJ0 a
1209 8
b
1211
0Z0s0j0Z ZbZ0apZB pl0ZpZ0o ZpZ0O0o0 0Zrm0Z0O O0M0A0L0 0O0Z0OPZ Z0ZRZRJ0 a
0Z0sqa0Z ZpS0Z0ok pZ0ZnZpo Z0ZpZ0Z0 0Z0A0Z0Z OPZ0Z0Z0 0O0Z0ZPO Z0Z0SQJ0 a
1208 8
Annihilation of the defensive piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0sbZrZkZ Z0ZnZpop pZpZpZ0Z l0Z0O0Z0 0Z0Z0Z0O Z0M0L0S0 POPZ0ZPZ Z0JRZBZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1213 8 7 6 5 4 3 2 1
1216
0Z0Z0snj Zpmbl0ap rZ0o0Z0Z o0oPZPZ0 PZPZNZ0Z ZPZBANZP 0Z0L0O0Z Z0JRZ0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1218
rZbl0Z0s opZnj0Zp nZpMpo0Z Z0ZpO0o0 0Z0O0M0L Z0ZBZ0Z0 POPZ0OPO S0Z0J0ZR a
c
0Z0s0ZkZ ZqZPZpop rZ0S0ZnZ o0Z0ZQZ0 0opA0ZRZ Z0Z0Z0O0 PO0Z0OPZ Z0Z0Z0J0 a
1215 8
b
1217
rZ0s0ZkZ ZplbZpop pZ0Zpm0Z Z0O0M0Z0 PZPZ0Z0Z S0Z0Z0Z0 0APZ0OPO Z0ZQS0J0 a
0Z0Z0Z0Z Z0l0Zrak 0Z0ZbZpZ Z0snZ0Zp 0ZNoBZ0O L0ZPZ0O0 0Z0ZPZKZ S0Z0M0ZR a
1214 8
Annihilation of the defensive piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZkZ Z0Z0Zpap 0Z0o0ZpZ ZpoPZPZP 0Z0lPZQZ ZPZrZ0M0 0Z0Z0ZPZ ZRZ0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1219 8 7 6 5 4 3 2 1
1222
0Z0Z0ZkZ o0Z0Z0op 0Z0Z0Zqs Z0ZpZ0Zr 0O0Z0Z0Z Z0OQZpA0 PZ0Z0O0O Z0ZRZ0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1224
0Z0Z0Z0s o0Z0ZRZ0 0o0Z0Znj Z0ZqO0Z0 PZps0Z0Z Z0Z0Z0OB 0ZQZ0Z0J Z0Z0ZRZ0 a
c
0Z0s0ZkZ ZpZrlpZ0 0ZpZpZ0o o0Z0OpZb PZPZ0O0M ZPZ0aBO0 0ZQZ0Z0O ZRZRZ0ZK a
1221 8
b
1223
0Z0l0s0j Z0Z0Z0op pZ0o0ZbZ ZpsNZ0ZQ 0Z0m0O0Z ZBZ0S0Z0 PO0Z0ZPZ Z0Z0S0J0 a
qs0s0ZkZ ZpZ0opZp 0ZnZnZpZ ZNOpZ0Z0 pO0O0ZPZ O0ZRZ0Z0 0Z0Z0O0O Z0ZQSBJ0 a
1220 8
Annihilation of the defensive piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZ0Z Z0lnZ0j0 po0Z0ops Z0ZpZPZ0 PZ0ZBZRZ Z0Z0Z0Z0 0OPL0ZPO S0Z0Z0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1225 8 7 6 5 4 3 2 1
1228
0s0Z0Zrj Z0S0Z0Zp 0ZNZpl0Z ZPmpZpZ0 0Z0ZnO0Z Z0Z0O0Z0 0Z0Z0ZBO L0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1230
rZ0ZrakZ ZpZbZ0Zn 0Zpo0opZ l0mPo0Z0 pZPZPZPZ O0M0A0Z0 0O0MBOKZ ZRZ0Z0LR a
c
0ZrZ0ZkZ Z0Z0ZpZ0 pZ0Z0ZpZ Z0ZQZ0O0 0oNZ0a0O ZPZ0Z0Z0 PZqZ0Z0Z J0ZRZ0Z0 a
1227 8
b
1229
0Z0Z0skZ o0Sba0op 0o0ZpZ0l ZPZpZ0Z0 PZ0O0ZnZ Z0Z0M0OP 0A0LPZBZ Z0Z0Z0J0 a
0Zks0a0Z ZbZ0Zqo0 pZ0opZ0s ZpZ0m0Zp 0Z0MPZ0O O0M0L0ZB 0OPZ0O0Z ZKZRZ0ZR a
1226 8
Annihilation of the defensive piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZkZ0s ZbZnapo0 pZ0Z0Z0o l0M0Z0Z0 0Z0Z0MPZ Z0oBZPZ0 PZPL0Z0O ZKZRS0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1231 8 7 6 5 4 3 2 1
1234
0ZrZ0skZ obl0Zpo0 0o0Zpm0o Z0Z0M0Z0 0Z0O0Z0Z Z0ZBO0Z0 PO0Z0ZPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1236
0Z0ZrZkZ ZbZpZ0o0 pZ0Z0ZrZ Z0o0Z0Zp 0o0Z0Z0Z Z0Z0M0Zq POPZ0OPL S0Z0ZRJ0 a
c
rZ0s0ZkZ o0Znlpo0 0ZbZpZ0o Z0Z0A0O0 0ZpZ0Z0L Z0ZBZ0Z0 POPZ0O0O Z0JRZ0S0 a
1233 8
b
1235
0Z0s0Zrj ZbZqoQZp pZ0oRapA ZpZnZ0Z0 0Z0oBZ0Z O0Z0ZNZP 0OPZ0OPZ Z0ZRZ0J0 a
0ZkZqZ0Z Sbo0Z0Zp 0o0o0o0Z Z0mPmNs0 0ZPZ0Z0Z Z0O0O0A0 QZ0Z0Z0O S0Z0Z0J0 a
1232 8
Annihilation of the defensive piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZkZ o0Z0Zpop 0onZbZrs Z0Z0Z0Z0 PApOpZ0l Z0O0O0MP 0Z0Z0OPZ SRZ0ZQJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1237 8 7 6 5 4 3 2 1
1240
0Z0Z0ZrZ opZ0ZpZk 0Z0ZqAbs Z0ZpZ0Z0 0ZpO0ZPZ Z0O0ZRZ0 PZPL0ZRZ Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1242
0Z0Z0ZRZ Z0Z0apZn 0Z0Z0Zpj Z0Z0A0Z0 0Z0Z0O0o ZpZqZ0ZP 0Z0Z0LPJ Z0Z0Z0Z0 a
c
rZ0l0skZ opo0Z0ap 0m0Z0ZpZ Z0ZPo0M0 0ZPZ0ZbZ Z0M0L0Z0 PO0Z0O0Z Z0JRZBZR a
1239 8
b
1241
0Z0Z0Z0Z Z0S0Z0Zp 0Z0Z0o0j Z0Z0oBZ0 0s0ZpZ0Z Z0Zrm0Z0 0O0ZRZPO ZKZ0Z0Z0 a
0Z0Z0skZ Z0Z0SnZp 0o0sQOpZ Z0o0ZpZ0 0Z0Z0O0l ZPO0ZRZP 0Z0Z0Z0Z Z0Z0ZBJ0 a
1238 8
Annihilation of the defensive piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0Z0Z Z0Z0Zpak 0oNS0mpo ZPZ0Z0Z0 0ZPZqZ0Z Z0Z0A0ZP 0ZRZ0LPJ s0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1243 8 7 6 5 4 3 2 1
1246
rZ0ZkZ0s opo0a0op 0Z0Z0o0Z Z0ZqZ0Z0 0Z0Z0ZQZ Z0ZNZ0Z0 POnZ0OPO S0A0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1248
rZ0lka0s Z0ZbZpo0 pZ0Z0Z0o Z0ZnZ0Z0 0o0o0ZPZ Z0ZQAPM0 POPZ0Z0O Z0JRS0Z0 a
c
rZbZkZ0s ZpZpZpop pZ0ZpO0Z Z0Z0Z0Z0 0Z0Z0Z0Z Z0Z0Z0Z0 PZPZBOPO l0AQZRZK a
1245 8
b
1247
rZ0ZkZ0s ZpZ0Zpop nZpZ0Z0l o0Z0Z0Z0 0Z0ZBO0Z OPZ0Z0Ob 0A0Z0O0O SQZRZ0J0 a
Qm0lkZ0s Z0Z0ZpZp pZ0o0ZpZ Z0oPZ0Z0 0Z0Z0AbZ Z0M0Z0Z0 PO0Z0JPO Z0Z0ZBZR a
1244 8
King in the middle
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZkZ0s opZ0mpo0 0Z0Zpm0o Z0Z0l0Z0 0Z0Z0M0Z O0M0Z0L0 0OBZ0OPO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1249 8 7 6 5 4 3 2 1
1252
rZblrZkZ Zpo0Zpo0 pZna0m0o Z0ZPo0Z0 0O0O0Z0Z O0M0ONZP 0ZQA0OPZ Z0S0JBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1254
rZ0ZkZ0s ZplbapZp pZnZpZ0Z Z0ZpmPo0 0Z0M0ZPZ O0M0A0Z0 0OPZQZBO Z0JRZ0ZR a
c
rZ0ZkarZ ZbZpZpZp po0ZpZ0Z Z0ZqZ0Zn 0Z0MNO0Z O0Z0ZQZ0 0O0ZPOBO S0ZRZKZ0 a
1251 8
b
1253
rZbZkZ0s opZ0apop 0Z0ZpZ0Z Z0Z0l0Z0 0m0ZBZ0Z ZQM0Z0Z0 PO0Z0OPO S0ARZ0J0 a
rZ0ZkZ0s opZbZpo0 nZqZ0Z0o Z0apOnZ0 0Z0Z0Z0Z O0Z0ZNA0 0Z0MBOPO ZRL0ZRJ0 a
1250 8
King in the middle
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0lkZ0s Z0ZbZpo0 pZ0ZpZ0o Z0a0O0Z0 0orM0M0Z Z0Z0L0Z0 POPZ0ZPO ZKZRZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1255 8 7 6 5 4 3 2 1
1258
0Z0ZrskZ o0l0Z0Zp Qo0Z0ZpZ Z0Zpa0Z0 0OpZ0ZPO Z0O0O0Z0 PZ0AKZ0Z S0Z0Z0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1260
QZ0Z0Z0Z Zpl0Zkop 0Z0Zbo0Z Z0ZrZ0Z0 0ZBZ0Z0Z O0Z0O0Z0 0s0Z0OPO Z0S0J0ZR a
c
rm0Z0Zqs o0opjpZp bo0a0m0Z Z0Z0M0Z0 0ZPOPZpZ Z0M0Z0O0 PO0ZBZKZ S0A0ZQZR a
1257 8
b
1259
0Zks0ZrZ Lpl0ZpZp 0m0ZpZ0Z Z0a0ZpZ0 0Z0Z0Z0Z Z0A0ZPO0 POPM0Z0O S0Z0J0ZR a
rZ0mkZ0s obZqa0op 0ZpZ0o0Z Z0ZpZPZ0 0Z0M0A0Z Z0Z0ZBZ0 POPZQZPO S0Z0S0J0 a
1256 8
King in the middle
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Zka0s Zbl0Zpop pZpZpZ0Z Z0Z0Z0Z0 0Z0ONZ0Z Z0Z0A0Z0 POQZ0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1261 8 7 6 5 4 3 2 1
1264
rZ0Zka0s opZnZpo0 0lpopZ0o Z0Z0O0M0 0Z0O0O0Z Z0O0Z0Z0 PZPZQZPO S0A0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1266
rZ0l0skZ opZ0opap 0mpZ0mpZ Z0L0Z0A0 0Z0OPZbZ Z0M0ZNZ0 PO0Z0OPO Z0ZRJBZR a
c
rZ0Zka0s opZ0Zpop 0lpZpm0Z Z0Z0Z0Z0 0ZBZRZ0Z Z0Z0ZQZP POPA0OPZ Z0JRZ0Z0 a
1263 8
b
1265
rZ0ZkZ0s opl0Z0ob 0Zpapo0o Z0Z0M0Z0 0ZBO0ZPO Z0Z0Z0O0 POPZQZ0Z Z0JRZ0ZR a
0ZrZks0Z o0lbapZQ 0Z0opZ0Z Z0Z0ZpZ0 0o0M0OBZ Z0Z0Z0O0 POPZ0Z0O J0ZRS0Z0 a
1262 8
King in the middle
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0ZkZ0s Z0ZqZ0op pZ0Zpo0Z O0Z0Z0Z0 0ZPZQZ0Z Z0Z0Z0Z0 0mBZ0ZPO ZRZ0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1267 8 7 6 5 4 3 2 1
1270
rZqj0a0s ZbZ0ZpZp pO0o0opZ Z0Z0Z0ZQ BZ0MPZ0Z Z0o0Z0Z0 0OPZ0OPO S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1272
rZ0Zbjns ZpZ0Z0op pZ0ZQZ0Z l0Z0Zpa0 PZBm0Z0Z Z0Z0Z0Z0 0OPo0OPO S0A0S0J0 a
c
rZbZkarZ ZpZ0lpZp pm0Z0Z0Z Z0Z0ZpZN 0Z0ZpZ0Z ZBO0ZNO0 PO0L0O0O Z0ZRJ0ZR a
1269 8
b
1271
0Z0jqZ0s o0m0Zpap bZ0Z0ZpZ OnA0Z0Z0 0Z0oQZ0Z Z0Z0Z0OB 0Z0Z0O0O ZRS0Z0J0 a
0s0ZkZrZ obopmpZp 0anZ0O0Z Z0Z0Z0Z0 QZ0Z0Z0Z A0OBZqZ0 PZ0Z0OPO Z0ZRS0J0 a
1268 8
King in the middle
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0ZkZ0Z Z0Z0ZnZ0 0Z0Z0A0Z Zpo0Z0Z0 0ZpZPoBZ Z0Z0Z0Z0 rZ0S0ZPO Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1273 8 7 6 5 4 3 2 1
1276
0s0l0j0s L0Z0Zpop 0ZBZ0m0Z Z0Z0Z0Z0 Pabo0Z0Z ZPZ0Z0O0 0ZPO0O0O S0A0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1278
0ZrZkZ0s ZpZ0apop pAbZqm0Z O0Z0o0Z0 0m0ZPZ0Z ZNM0ZBZ0 0OPZQZPO S0Z0ZRZK a
c
rZ0ZkZns Z0Z0Zbop pZ0ZpZ0Z ZpAqO0ZP 0Z0o0OPZ Z0Z0Z0Z0 PO0Z0Z0Z S0ZQJBZR a
1275 8
b
1277
rZ0ZkarZ obZnZpZ0 0ZqZpZ0o Z0O0O0Z0 0o0Z0L0A ZPo0ZNZ0 PZ0ZBOPO S0ZRZ0J0 a
rZbZka0s ZplnZpo0 pZ0Zpm0o Z0o0Z0M0 0Z0O0Z0Z Z0ZBZNZ0 POPAQOPO S0Z0J0ZR a
1274 8
King in the middle
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ska0s Z0o0Z0op pZ0ZBZ0Z ZpZ0O0Z0 0Z0m0ZQZ Z0Z0Z0Z0 PZ0Z0OPO l0A0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1279 8 7 6 5 4 3 2 1
1282
rZ0Z0skZ opo0Zpop 0Z0Z0Z0Z Z0OpZ0l0 0O0MnZ0Z O0ZpOPOb 0Z0O0Z0O S0AQJ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1284
0Z0jnZ0s Z0s0Zpop po0ZpZ0Z Z0Z0Z0Z0 0ZqO0Z0Z A0Z0ZNLP PZPZ0OPZ Z0Z0S0J0 a
c
rZbZkZ0s Z0o0mpop pZpl0Z0Z Z0Z0S0Z0 0ZQZ0Z0Z Z0M0Z0Z0 POPZ0OPO S0A0Z0J0 a
1281 8
b
1283
rZ0ZkZ0s opZqm0op 0ZpZ0o0Z Z0Z0Z0Z0 0Z0O0Z0Z Z0Z0ZNZ0 PO0ZQOPO Z0S0A0J0 a
rZ0Z0j0s opM0Z0op 0ZnZRm0Z Z0l0Z0A0 0ZBZ0Z0Z Z0Z0ZpZ0 POPZ0OPO Z0JRZ0Z0 a
1280 8
King in the middle
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rl0ZkZrZ opZnZpZ0 0ZpZpabZ Z0Z0Z0Zp 0ZQZ0ZPO Z0Z0ZNZ0 POPZ0OBZ S0A0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1285 8 7 6 5 4 3 2 1
1288
rm0l0skZ opZ0Zpo0 0Z0Z0mpZ Z0a0Z0Z0 0ZBZ0ZPZ Z0M0Z0ZP PO0Z0O0Z S0AQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1290
rZ0lka0s opZnZpZp 0ZnZ0ZpZ Z0Z0ORZ0 0ZPZ0Z0Z Z0M0A0Z0 PO0ZBZPO Z0SQZ0J0 a
c
rZbZkZ0s o0Zqopap 0oNZ0Zpm Z0o0O0Z0 0Z0Z0Z0Z Z0M0Z0ZP POPZ0OPZ S0AQS0J0 a
1287 8
b
1289
rlbZkZ0s ZpZ0Zpop pZnZ0Z0Z Z0ZpZRZ0 0ZPZNZ0Z Z0Z0Z0Z0 PO0ZBZPa S0AQZ0ZK a
rZ0lka0s opZ0Zpop nZpZ0Z0Z Z0ZpO0Zn BZ0O0o0Z Z0L0Z0ZN POPZbZPO SNA0ZRJ0 a
1286 8
King in the middle
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0j0s ZbZ0apZ0 0l0opZ0Z o0Z0ZpZ0 0oBMPOQZ Z0Z0Z0Z0 POPZ0Z0O ZKZRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1291 8 7 6 5 4 3 2 1
1294
rZ0lkZ0s Zpm0ZpZ0 0Zpapo0Z o0Z0Z0Ob PZ0O0Z0o ZBO0ZNZP 0O0AQO0Z Z0J0S0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1296
0l0s0Z0s Z0ZNjpZp 0ZpZ0Zpa Z0Z0o0Z0 pZ0Z0ZPM Z0ZQZ0ZP POPZ0O0Z ZKZRZ0Z0 a
c
rZ0Z0skZ opZnZpap 0Z0L0ZpZ l0Z0O0Z0 0Z0Z0O0Z Z0M0Z0Z0 PO0Z0ZPO S0A0J0ZR a
1293 8
b
1295
0Z0ZrZ0s opo0Zkop 0l0ZbZ0Z mPZ0Z0Z0 0Z0Z0Z0Z Z0LBS0Z0 PZ0Z0OPO Z0Z0S0J0 a
qZ0ZkZ0s opo0Zpa0 0ZbZpZ0Z Z0Z0M0Zp 0l0O0Z0O Z0M0Z0Z0 POPZQZPZ Z0JRZ0ZR a
1292 8
King in the middle
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZkl0s ZpZnZ0ap pZ0s0ZpZ Z0ZPopA0 QZPZNZ0Z Z0Z0Z0Z0 PO0ZBOPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1297 8 7 6 5 4 3 2 1
1300
0Z0a0skZ Z0o0Z0l0 0o0o0ZpZ o0ZPo0Z0 0ZPZNZPZ O0Z0ZPZ0 KO0Z0Z0S Z0Z0Z0ZQ a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1302
0l0Z0Z0j Z0Z0Zrop QZRo0Z0Z ZPZ0o0Z0 0Z0ZPZ0Z Z0Z0Z0O0 0Z0Z0J0O Z0Z0Z0Z0 a
c
0Zks0ans opo0Zpop 0Zno0Z0Z Z0Z0Z0Z0 0Z0OPAbl Z0M0ZNZ0 POPZKZPO S0ZQZBZR a
1299 8
b
1301
rZ0ZkZ0s ZpZnZqo0 pZ0ZpZ0o Z0Z0Z0LP 0Z0ZKZPZ Z0OpZPaR PO0Z0Z0Z S0A0ZBZ0 a
0Z0ZrskZ ZboRZpZ0 0oqZpLpZ o0Z0O0Zp PZPS0Z0O Z0Z0ZNZ0 0ZPZ0OPZ Z0Z0Z0J0 a
1298 8
March with the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZQZ0Z Z0Z0Z0ZR 0Zko0Z0Z Z0o0o0a0 0s0ZnZ0Z l0Z0Z0Z0 PZ0Z0ZPJ S0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1303 8 7 6 5 4 3 2 1
1306
0ZrZ0Z0j ZpZ0Z0Zp pZ0ZpMpZ ZbZ0O0Z0 0Z0Z0Z0Z O0ZPL0Z0 0O0Z0S0O ZKZ0Z0Zq a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1308
rmbZka0s opZpZ0op 0lpZ0o0Z Z0Z0Z0Z0 0Z0ONZ0Z Z0Z0Z0Z0 POPZQOPO S0Z0JBMR a
c
0L0Z0s0s Z0Z0spZp 0Z0o0j0Z lBZPZpZ0 0Z0ZpZPZ Z0Z0Z0Z0 PO0Z0O0O S0Z0ZKZR a
1305 8
b
1307
0Z0Z0Z0Z ZrZ0jpZ0 0Z0ZpZpZ Z0OpZ0Zp qZnO0Z0O O0LRZ0O0 0o0Z0OKZ ZRZ0Z0Z0 a
0s0Z0ZkZ orZnZ0Zp 0ZbZRlpZ Z0ZpZPZ0 0Zpo0Z0Z O0M0ZPL0 0O0S0ZPO ZBZ0Z0J0 a
1304 8
March with the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0skZ ZpZbZ0Zp pZnZ0Z0Z Z0ZpS0M0 0Z0O0O0Z Z0Z0Z0O0 POBLRJPs Z0Z0Z0Zq a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1309 8 7 6 5 4 3 2 1
1312
0Z0Z0ZqZ ZRZQZ0Zp 0o0Z0Zks Z0Z0ZpZ0 pZ0Z0o0Z O0ZBa0ZP 0Z0Z0ZPZ Z0Z0Z0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1314
0j0Z0Z0s opZblpZ0 0Z0ZpZ0Z ZnZpOpMp rZpO0O0O O0O0Z0O0 RAPZQZKZ S0Z0Z0Z0 a
c
0Z0srZkZ o0Z0Zpop BZpZ0Z0Z Z0apZ0l0 0Z0ZnZ0Z OPZ0OPZP 0AQZ0O0Z S0Z0S0J0 a
1311 8
b
1313
0Z0skZ0s ZbZ0Z0op pZnZ0Z0Z O0Z0ZpZ0 0oBO0Z0Z Z0Z0JNZ0 0Z0Z0OPO S0Z0Z0ZR a
0ZQZ0akZ Z0o0Zpop 0Z0Z0Z0s o0ZPs0Z0 0m0Z0M0Z OBM0A0Z0 0O0ZQO0Z S0ZRZ0ZK a
1310 8
March with the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZnskZ o0ZqZ0op bo0o0o0Z m0oPoPZ0 PZPZPZ0Z Z0OBA0M0 0Z0ZQZPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1315 8 7 6 5 4 3 2 1
1318
0Z0Zks0Z Z0ZnZpLp 0Z0ZpZ0Z Z0Z0Z0Z0 0Z0o0Z0Z ZqZ0Z0Z0 0Z0A0OPO S0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1320
0Z0ZrZ0Z opZ0Z0j0 0Z0Z0Z0o Z0Z0Z0o0 0Z0L0Z0Z Z0O0MqOb PZ0Z0Z0O S0Z0Z0J0 a
c
0Zqa0ZkZ Z0Z0Z0Z0 0Z0o0Z0Z Z0oPo0s0 QZPZPo0Z S0Z0Z0Z0 0Z0Z0JPZ Z0M0Z0Z0 a
1317 8
b
1319
0ZrsbZkZ ZpZ0Z0Z0 pZ0ZpLpZ Z0Z0OpZ0 0O0Z0Z0Z O0Z0O0ZP 0Z0Z0Z0O Z0Z0S0J0 a
0Z0Z0Zrj opo0lpsp 0Z0o0onZ Z0Z0Z0ZQ 0ZPZ0O0Z Z0S0O0O0 POBZ0S0O Z0Z0Z0J0 a
1316 8
March with the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0Zrj opo0m0Z0 0Z0o0m0Z Z0OPo0Z0 0ONZPo0o Z0M0ZPZ0 PZ0ZBZPO Z0SQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1321 8 7 6 5 4 3 2 1
1324
rZblnZ0j Z0o0a0Zr 0oPo0ZnZ Z0ZPo0op pO0ZPoPZ O0MNZPZP 0AQZBZKZ ZRZ0Z0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1326
rZbZnZkZ opZqZ0Zp nZ0o0arZ ZNZPo0Z0 PZNZPZ0A Z0Z0ZPO0 0O0ZBZ0Z S0ZQZRJ0 a
c
rZ0s0mkZ obZ0l0Zp 0o0ZpZpZ Z0opOpZ0 0Z0Z0OPZ Z0OBO0S0 PO0MQZ0O Z0ZRZ0J0 a
1323 8
b
1325
rZblnZ0j Z0o0Z0a0 0o0o0Z0s ZNZPo0o0 pOPZPoPm O0ZNZPZ0 0AQZBZKZ ZRZ0Z0ZR a
0S0Z0L0Z l0Z0s0ok 0Z0ZpZ0o Z0ZnOpZ0 pZpZ0Z0O O0O0ZbO0 0S0A0Z0Z Z0Z0ZKZ0 a
1322 8
March with the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Z0j ZpZ0Z0Zp 0Z0o0ZpZ Z0ZPZnl0 0O0Z0o0Z Z0Z0ZPZP rZ0Z0O0Z Z0S0LBZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1327 8 7 6 5 4 3 2 1
1330
bZ0Z0ZkZ Z0Z0Z0op 0Z0Z0o0Z ZpZ0o0Z0 0O0ZPZ0Z Z0ZrZqO0 0AQZ0O0O Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1332
0Z0Z0Z0Z L0Z0Z0jp pZ0onZpZ ZpZrs0Z0 0O0Z0Z0O O0ZBZ0Z0 0ZPZ0ZPZ Z0Z0Z0J0 a
c
rZ0Z0Zqs Z0ZkZ0Zp 0ZpZpS0S o0OpOpO0 Pa0O0Z0Z Z0ZQZNZ0 0Z0Z0O0Z Z0Z0ZKZ0 a
1329 8
b
1331
0Z0ZbZ0Z ZkZ0Z0l0 pZ0ZpZpZ ZpOpMpO0 0O0Z0O0Z O0Z0O0J0 0Z0ZBZ0Z Z0Z0Z0ZR a
rZbZ0a0s opZ0ZkZ0 0ZnZNZ0o Z0ZpO0o0 0ZpZ0Z0Z Z0O0Z0Z0 qZBA0OPO ZRZQJ0ZR a
1328 8
March with the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0s0Z a0Z0lpj0 0Z0o0Z0o Z0ZBoQoP 0O0ZPZ0Z Z0O0ZRO0 0Z0Z0O0Z Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1333 8 7 6 5 4 3 2 1
1336
rZ0ZkZ0s opZ0lpZ0 0ZpZbm0Z Z0ZPZ0A0 PONZ0Z0Z Z0OBZ0Z0 0Z0Z0JPa S0Z0LRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1338
rZbZRZ0Z o0Z0Z0jp pZpZ0Z0Z Z0l0Z0Z0 0Z0Z0Z0Z Z0M0ZPmP POPZ0Z0Z S0L0Z0ZK a
c
0Z0Z0ZkZ Z0Zronap pZnZpZpZ ZpZ0O0Z0 0Z0ZRAPZ O0M0ZNZP 0OPZ0Z0Z Z0Z0Z0J0 a
1335 8
b
1337
0s0s0Z0Z Z0Z0Zpjp pZ0o0ZpZ Z0o0o0Z0 0ZPZPZ0Z ZPM0Z0ZB PZ0S0Z0O Z0Z0Z0J0 a
0ZbZrZnZ ZpZ0s0j0 pZpS0opo Z0M0Z0Z0 0O0ZPZPZ Z0A0ZPZ0 0OPZ0ZKZ Z0Z0Z0ZR a
1334 8
March with the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZkZ ZpZ0arZp 0A0o0ZnZ ZPZPo0Z0 0O0ZPoPl Z0ZBZPm0 0Z0M0JPZ L0Z0Z0S0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1339 8 7 6 5 4 3 2 1
1342
0Z0Z0Zrj Z0oqZ0Zp pZRo0m0Z Z0ZPo0Zn 0O0ZPo0L Z0ZNZPZ0 PZ0ZNZ0O Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1344
0Z0Z0j0Z obZ0orZp 0l0oRo0O ZpsPZ0Z0 0Z0ZRo0Z OBZ0Z0Z0 0OPL0ZPZ Z0Z0Z0J0 a
c
rZbZkZ0M opo0Z0op 0Z0Z0Z0Z Z0ZpZqZ0 0ZBOnZ0Z A0Z0ZpZ0 PZ0Z0ZPO SNZ0L0J0 a
1341 8
b
1343
0Zna0Z0j Z0l0Z0s0 QZ0o0Z0o ZRoPo0o0 0ZPZPo0Z Z0A0ZPZ0 0Z0ZBZPO Z0Z0Z0J0 a
0Z0Z0Zrj Z0o0m0Z0 0o0o0m0a Z0ZPo0ZP 0OPZPo0Z Z0A0ZBZ0 0Z0Z0JPl S0ZQS0Z0 a
1340 8
March with the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0lrZkZ ZpZ0Zpo0 0anZ0Z0o o0Z0ZQZ0 0Z0o0A0O O0ZNZ0O0 0ORZPO0Z Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1345 8 7 6 5 4 3 2 1
1348
0Z0Z0skZ Z0ZQZpop pZ0ZpZ0Z ZpZ0Z0Z0 0Z0Z0Z0Z ZNO0Z0O0 PZPZqZKO S0Z0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1350
0Z0ZnZkZ Z0mbZ0o0 0Z0o0Z0Z Z0oPo0A0 0oPZPZ0Z oPZBZ0ZP 0Z0Z0ZPZ Z0M0ZRJ0 a
c
0ZrZ0jns Z0o0ZpZ0 pZBo0Z0l ZpZ0Z0o0 0Z0MPZpZ Z0Z0Z0O0 PO0L0O0Z S0Z0ZRJ0 a
1347 8
b
1349
0Z0Z0skZ s0ZqZnon 0obZ0o0o o0o0ZPZ0 PZPoPAPO Z0ZPZ0LN 0ZBZ0Z0Z S0Z0ZRJ0 a
0ZrZ0Z0s ZpZbZkZ0 pZ0ZpM0Z Z0Z0ZpA0 0Z0L0ZPZ Z0Z0ZBZ0 POPZ0Z0l S0Z0Z0J0 a
1346 8
March with the king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0Z0j ZqZ0apZp pObopm0Z Z0Z0Z0Z0 0O0ZPO0Z Z0MQABZ0 0ZPZ0Z0O SRZ0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1351 8 7 6 5 4 3 2 1
1354
rl0Z0skZ Z0Zbapo0 pZ0opm0o Z0Z0Z0Z0 0o0APO0Z Z0ZBZ0M0 POPL0ZPO ZKZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1356
rZ0ZkarZ ZbZ0ZpZ0 plnZpo0o Z0Z0O0Z0 QZBO0Z0Z M0Z0ZNZ0 0O0Z0OPO S0Z0ZRJ0 a
c
0Z0ZrskZ Z0lnZpZ0 0ZbZpZpo o0Z0O0aN 0o0A0Z0Z Z0ZBZ0ZP POPZQZPZ ZKZRZRZ0 a
1353 8
b
1355
rZbZ0skZ o0Z0apop 0o0Zpm0Z Z0l0M0Z0 0Z0Z0Z0Z Z0ZBZ0Z0 POPAQOPO Z0JRZ0ZR a
rZrZ0ZkZ Z0Z0opap 0Z0obZpZ oqZ0Z0O0 0o0APZ0O ZNZ0ZPZ0 POPZ0L0Z ZKS0Z0ZR a
1352 8
Opposite side castling
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0Z0s ZblnZpop pZ0ZpZ0Z ZpaPZ0Z0 0ZpZPZnZ Z0Z0ZNZP POBZQOPZ S0ANS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1357 8 7 6 5 4 3 2 1
1360
rZrZ0ZkZ Z0l0ZpZp 0Z0a0ZpZ Z0ZPo0Z0 pobZBZPZ Z0Z0S0Z0 POPZ0ZQO ZKARZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1362
rZrZ0ZkZ opZbZpa0 0Z0o0m0Z Z0Z0opL0 0Z0ZPZPZ ZBM0ZPZ0 POPZ0l0Z Z0JRZ0ZR a
c
rZbZ0skZ opZ0Z0ap 0Zno0ZpZ l0o0ZpZ0 0ZPmPO0O Z0MPANZ0 PO0LBZ0Z Z0J0S0ZR a
1359 8
b
1361
rZbZ0skZ o0Z0apo0 0lpopm0o Z0Z0Z0Z0 0Z0ZPO0A Z0M0Z0Z0 POPL0ZPO Z0JRZBZR a
0s0Z0skZ Z0Z0mpZp 0l0o0apZ opZPo0Z0 0Z0Z0Z0Z O0OBZ0Z0 0ONZQOPO ZKZRZ0ZR a
1358 8
Opposite side castling
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZrZ0ZkZ Z0l0Zpap pZ0obZpZ ZpZ0o0O0 0Z0ZPO0L ZPM0ARZ0 0OPS0Z0O ZKZ0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1363 8 7 6 5 4 3 2 1
1366
rZ0Z0skZ Z0Zbapop pZqopZ0Z Z0Z0Z0OQ 0o0APZ0Z ZPM0Z0Z0 0OPZ0O0O Z0JRZ0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1368
0ZrZ0s0j Zblnapop pZ0opZ0Z ZpZ0Z0O0 0Z0APZ0O O0M0ZPZ0 0OPL0Z0Z ZKZRZBS0 a
c
0Zrl0skZ ZbZ0Zpop pZ0ZpZ0Z ZpmpZ0Z0 na0ZPOPZ ZNZBA0M0 POPZRL0O Z0JRZ0Z0 a
1365 8
b
1367
rZrZ0ZkZ Zbl0apop pZnopZ0Z Z0mBZNO0 0o0ZPZ0Z Z0M0A0S0 POPZQO0O Z0JRZ0Z0 a
0Zrl0skZ ZbZnapop pZ0opZ0Z Z0Z0Z0O0 0o0APZ0O Z0Z0ZPZ0 POPLNZ0Z ZKZRZBS0 a
1364 8
Opposite side castling
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ ZbZ0apop 0Z0opZ0Z o0Z0m0OP 0o0MPZ0Z Z0Z0APZ0 POPL0Z0Z Z0JRZBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1369 8 7 6 5 4 3 2 1
1372
0ZbZ0skZ ZrZnapop pZ0ZpZ0Z l0ZpZ0O0 0Z0A0O0O Z0M0L0Z0 POPZBZ0Z Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1374
rZ0Z0skZ ZbZ0apop pZ0ZpZ0Z lpZ0Z0O0 0Z0MpO0O Z0Z0L0ZB POPZ0Z0Z ZKZRZ0ZR a
c
rZ0ZnskZ Z0lnZpop pZ0ZpZ0Z ZpZbZ0O0 0Z0MNZ0Z a0Z0Z0ZQ 0OPZBO0O Z0JRZ0S0 a
1371 8
b
1373
0srZ0ZkZ Z0Z0Zpo0 pZ0o0l0o Z0Z0ZPZ0 0ZnM0A0a ZPZ0Z0Z0 0ZPZQZRO Z0JRZ0Z0 a
rZ0Z0skZ Zbl0apop pZnZpZ0Z Z0Zpm0O0 0o0MPZ0O Z0ZBAPZ0 POPZNZQZ ZKZRZ0ZR a
1370 8
Opposite side castling
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0a0s ZplbZpop pZ0Z0Z0Z Z0Z0o0Z0 POBM0ZnZ Z0Z0Z0O0 0ZPZQO0O S0A0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1375 8 7 6 5 4 3 2 1
1378
rZ0Z0skZ obl0Zpop 0o0Zpm0Z Z0Z0M0Z0 0Z0o0Z0L Z0ZBZ0Z0 POPZ0OPO Z0JRS0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1380
rZrZ0ZkZ opl0opZp 0Z0obmpL Z0Z0Z0Z0 0Z0ZPZPZ Z0M0ZPZ0 POPZ0Z0Z ZKZRZBZR a
c
0ZrZ0ZkZ Z0Z0Zpa0 0ZQobopZ o0Z0Z0Z0 0a0APl0Z oPM0ZPZ0 0ZPZ0Z0Z J0ZRZBZR a
1377 8
b
1379
0ZrZ0akZ o0Z0lpZp 0Z0ZbZpZ Z0ZpL0Z0 0Z0Z0Z0Z Z0M0ZPZ0 PO0Z0ZPO Z0JRZBZR a
rs0Z0ZkZ o0lbZpZ0 0Z0opapZ Z0Z0Z0Z0 0ZpMPZPZ Z0O0APZ0 PO0ZQZ0Z Z0JRZ0ZR a
1376 8
Opposite side castling
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0lrZkZ Z0Z0Zpa0 pZ0o0mpZ Z0o0Z0Z0 0ZBZPZ0Z Z0Z0APZ0 PO0L0Z0O Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1381 8 7 6 5 4 3 2 1
1384
0sbl0skZ Z0Z0opa0 pZpo0ZpA Z0ZPZ0Zp 0mpO0ZPO Z0M0ZPZ0 PO0L0Z0Z Z0JRZBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1386
0sbl0s0Z Z0o0opZk pZno0m0Z Z0Z0Z0LP 0ZpOPZpZ Z0M0ZPZ0 PO0ZNZ0Z Z0JRZBZR a
c
0sbl0skZ Z0Z0opZ0 pZ0o0apZ Z0o0Z0ZP 0mpOPZ0O Z0M0APZ0 PO0L0Z0Z Z0JRZBZR a
1383 8
b
1385
0sbl0s0Z Z0Z0Zpj0 0Z0o0ZpZ Z0oNmPZp 0o0ZPZ0O Z0Z0Z0Z0 PO0L0ZPZ Z0JRZBZR a
0Z0ZqskZ Z0Z0Zpa0 pZ0L0ZpZ ZrZ0m0Zp 0ZpZPZ0O Z0Z0APZ0 POBS0ZPZ Z0J0Z0ZR a
1382 8
Opposite side castling
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZqZ0skZ ZpZ0o0ap 0Zro0ZpZ o0Z0m0ZP PZ0ZPM0Z ZPZ0APZ0 0ZPL0Z0Z ZKZRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1387 8 7 6 5 4 3 2 1
1390
0Z0s0ZkZ Z0l0Zpo0 0Z0ZpZ0o o0ZnO0Z0 0o0Z0Z0O Z0ZNZ0Z0 POPZQSPZ ZKZ0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1392
rZ0Z0skZ Z0Zbapop 0l0opm0Z Z0Z0mPA0 po0MPZPZ Z0ZBZNZP POPL0Z0Z ZKZRZ0ZR a
c
0ZrlrZkZ o0Z0apo0 0ZpZnm0o ZpZpA0Z0 0Z0O0Z0Z Z0MBO0ZP POQZ0OPZ ZKZRZ0ZR a
1389 8
b
1391
rZrZqZkZ ZbZ0apop 0Z0opm0Z o0Z0m0Z0 0o0MPO0Z ZBZ0Z0A0 POPM0ZPO ZKZRL0ZR a
0Zrs0ZkZ Zbl0a0mp 0Z0Zpm0Z Z0Z0Z0Z0 po0ZNZPZ Z0ZBZ0ZQ POPMRZ0O ZKZRZ0Z0 a
1388 8
Opposite side castling
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zksqans Zpo0Zbo0 pZpZ0o0Z Z0Z0Z0Zp 0Z0MPZ0Z ZNZ0A0ZP POPZQOPZ S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1393 8 7 6 5 4 3 2 1
1396
0Zks0a0s ZponZqop pZ0Z0o0Z Z0o0Z0Z0 0Z0ZPO0Z ZNZ0A0ZQ PZPZ0ZPO Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1398
0ZkZ0Z0s o0Z0ZpZ0 0Z0aqO0Z Z0o0m0Z0 Nops0Z0O Z0Z0APO0 POQZ0ZKZ Z0Z0SRZ0 a
c
rZbs0ZkZ Z0lnapop pZ0opZ0Z Z0Z0Z0OQ 0o0APO0Z Z0M0Z0S0 POPZ0Z0O Z0JRZBZ0 a
1395 8
b
1397
0Zks0a0s ZpoqZ0Zp pZpZ0o0m Z0Z0o0o0 PO0ZPZbZ Z0ZPANZ0 0ZPM0OPO SQZ0ZRJ0 a
0sbZ0skZ o0l0Zpap 0ZpZ0ZpZ Z0Z0o0Z0 0ZBZNZPZ Z0Z0LPZ0 POPZ0Z0O Z0JRZ0ZR a
1394 8
Opposite side castling
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZrZ0a0j Z0lbZpZ0 pZnopOpO Z0Z0m0M0 0o0MPA0L Z0O0Z0S0 PO0Z0Z0O Z0JRZBZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1399 8 7 6 5 4 3 2 1
1402
0Z0l0skZ opZbopAp 0Z0o0ZpZ Z0Z0Z0Z0 0Z0snOPZ Z0M0Z0Z0 POPZ0Z0L Z0J0Z0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1404
0Z0s0ZkZ ZrZ0apo0 pZ0obm0o Z0Z0Z0Z0 qo0APL0Z ZNZBZ0Z0 POPZ0ZPO ZKS0S0Z0 a
c
rZ0s0ZkZ oqZ0Zpap 0Z0obmpZ ZpZ0o0O0 0M0ZPZ0Z Z0Z0APZ0 POPLBZ0O ZKZRZ0ZR a
1401 8
b
1403
0srZ0ZkZ o0Z0opO0 0Z0obZpZ Z0Z0Z0Z0 qZ0APZ0Z o0Z0ZPZ0 0OPLNZ0Z ZKZRZBZR a
rZqZ0skZ o0opa0op 0o0Z0m0Z Z0ZpZ0Z0 0Z0O0M0Z O0Z0APZ0 0OPZQZPO ZKZRZ0ZR a
1400 8
Opposite side castling
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ o0o0Zpa0 0Z0o0Z0o ZpZ0m0ZB 0Z0Z0O0o Z0M0O0Z0 POPMQZPO Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1405 8 7 6 5 4 3 2 1
1408
0ZbZkZ0s Z0Zna0op pl0ZBZ0Z Z0ZQo0O0 0Z0Z0O0Z Z0M0Z0Z0 PsPZ0Z0O Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1410
0Z0ZrZkZ opZ0Z0Z0 0Z0apZPZ ZPo0Z0Zp 0Zpo0Z0Z Z0Z0ZrZB 0O0Z0lPO S0ZQS0ZK a
c
0Z0s0Z0Z o0ZrZnZ0 0ZPZqZkZ Z0ZNZpZp PZQZpOpZ Z0Z0Z0O0 0Z0S0Z0O Z0ZRZ0J0 a
1407 8
b
1409
0s0Z0s0j Z0Z0lpop pZ0SbZ0Z ZpZ0A0a0 0Z0MPZ0Z Z0O0Z0LP PO0Z0ZPZ Z0Z0ZBZK a
rl0s0ZkZ obZ0Zpo0 0o0apm0A Z0Z0Z0Z0 0Z0O0Z0Z ZBZQZNZ0 PO0Z0OPO Z0S0S0J0 a
1406 8
Counter attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0j0Z o0Z0ZpZQ 0o0Zpo0o Z0O0Z0Z0 0Z0Z0l0Z Z0O0Z0Z0 POBZ0ObO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1411 8 7 6 5 4 3 2 1
1414
0Z0Z0Zrj S0L0Z0Zp 0Z0S0Zpl Z0o0Z0Z0 0s0Z0Z0Z Z0Z0ZPJ0 0Z0Z0ZPO Z0Z0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1416
rZ0s0ZkZ opZ0opZ0 0Z0Z0mpL Z0o0ZbM0 0ZPZ0Z0O lPM0ZPZ0 PZ0Z0JPZ Z0S0Z0ZR a
c
0Zrl0skZ o0Zbo0ap 0Z0ZNZpZ Z0ZpZ0A0 0Z0Z0Z0Z Z0Z0Z0Z0 POPZQZPO Z0JRZ0ZR a
1413 8
b
1415
0Z0l0skZ Z0Z0apZp 0ZPo0ZpZ ZNZPZ0Z0 0ZNZPm0Z ZQZ0Z0Zb 0Z0Z0O0Z Z0Z0SBJ0 a
rZ0Z0a0s o0j0ZpZ0 0ZbZ0l0o Z0Z0o0Z0 PZQZ0Z0o Z0Z0Z0Z0 0O0ZBOPO Z0S0ZRJ0 a
1412 8
Counter attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0sbl0s0j Z0o0Z0Zp pZno0ZpL Z0ZNo0Zn 0ZpOPZPZ Z0Z0ZPZ0 PO0ZNZ0Z S0Z0JBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1417 8 7 6 5 4 3 2 1
1420
0ZrZ0ZkZ Z0l0apop pZ0o0Z0O Z0ZPmbO0 0Z0L0O0Z ZrZ0A0Z0 0OPS0ZRZ Z0ZKZBZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1422
0Z0Z0s0Z Z0Z0Zpj0 0ZpZ0ZpZ Z0MpZ0Zp 0Z0O0Z0l Z0ZBZ0sb PL0ZRSNZ Z0Z0Z0J0 a
c
rZ0s0ZkZ o0Z0lpop 0o0Zpm0Z Z0a0O0A0 0Z0Z0Z0L Z0MbZNZ0 PO0Z0OPO Z0JRZ0ZR a
1419 8
b
1421
rZbZ0skZ ZpZqZ0Z0 pZ0M0Zpo Z0oPZ0Zn 0ZPaNZ0Z Z0ZQZPO0 PO0ZBZKO S0Z0ZRZ0 a
rZ0ZrZkZ opZ0ZpZp 0Z0o0ZpL Z0o0Z0Zn 0ZPMPZqZ Z0M0Z0Z0 PO0Z0Z0O S0Z0S0ZK a
1418 8
Counter attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZka0s Z0Z0lpop 0Z0Zpm0Z ZNA0o0Z0 PZpZ0ZPZ Z0Z0ZPZ0 0OPL0Z0O Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1423 8 7 6 5 4 3 2 1
1426
rZ0ZkZ0s ZbZnZpo0 pZ0ZpZ0o l0Zna0ZN 0o0M0ZPZ Z0ZBAPZ0 POPL0Z0O ZKZRS0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1428
0srZ0Z0j o0Z0opaP 0Z0o0m0Z l0ZbZ0O0 0o0APZ0Z O0Z0ZPZ0 0OPL0Z0Z Z0JRZBZR a
c
0ZrZ0s0j opl0Z0ap 0Z0Z0mpZ Z0ZpZ0Z0 0Z0ZpZPO Z0OBAPZ0 PO0L0Z0Z ZKZRZ0ZR a
1425 8
b
1427
0srZ0ZkZ o0Z0opap 0Z0obmpO lpZ0Z0Z0 0Z0APZPZ O0M0ZPZ0 0OPL0Z0Z ZKZRZBZR a
0srZ0ZkZ o0Z0opa0 0l0ZbmpZ ZpZ0A0L0 0Z0Z0ZPZ O0M0ZPZ0 0OPS0Z0Z ZKZ0ZBZR a
1424 8
Counter attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ opl0opA0 0Z0Z0ZpZ Z0ZnZ0L0 0Z0Z0Z0Z Z0Z0ZpZ0 POPZ0ZPZ Z0JRZBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1429 8 7 6 5 4 3 2 1
1432
0s0Z0ZkZ Z0o0Z0mp 0Z0l0Z0Z ZroPoPZ0 pZ0Z0Z0Z O0Z0L0Z0 0OBZ0Z0O ZKZRZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1434
0Z0Zqs0j Z0onZpZp pZ0ZPo0Z mra0O0ZQ 0opZNZ0Z Z0Z0Z0O0 PO0Z0OBO S0ZRZ0J0 a
c
0Zks0ZrZ opo0ZpOp 0ZnZbZ0Z Z0aqZPM0 0ZpZNZPZ Z0ZpZ0Z0 POPZ0ZKO S0AQS0Z0 a
1431 8
b
1433
0Z0skZ0s a0o0Zpo0 pZpZ0Z0Z ZpZ0O0Zp 0O0MPlbm Z0O0Z0O0 PAQM0O0Z S0Z0S0J0 a
rZbl0skZ opo0Zpap 0Z0ZnZNZ Z0Z0Z0Z0 0Z0APZ0Z Z0M0Z0Z0 POPZ0ZPO S0ZQJBZR a
1430 8
Counter attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0ZrZka oqobZpZp 0Z0o0mpA Z0o0Z0ZP 0Z0ZPZ0Z O0Z0ZPZ0 0OPLNZPZ Z0JNS0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1435 8 7 6 5 4 3 2 1
1438
0Zrl0skZ Z0Z0apo0 0Z0ZnmpZ ZpZpO0Z0 0Z0Z0Z0Z ZPZ0A0ZP 0ZBM0OPZ SQZ0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1440
rZ0ZkZ0s Z0Z0apZ0 0Z0opZ0o oNZ0m0ZQ 0oqMPZ0Z Z0Z0Z0Z0 POPZ0ZPO Z0JRZRZ0 a
c
0ZrZ0ZkZ Z0lbZpa0 0Zro0ZpZ Z0Z0o0O0 po0MPO0Z Z0Z0A0Z0 POPS0L0Z ZKZ0Z0ZR a
1437 8
b
1439
rZblrZkZ opZ0apZp 0Z0Z0Z0A Z0Z0Z0Z0 0Z0Z0Z0Z Z0M0ZPZ0 PO0LBJnO S0Z0Z0ZR a
0ZrZ0ZkZ oplbopa0 0Z0o0ZpZ Z0ZPZ0ZP 0ZrM0Z0Z Z0Z0APZ0 POPZ0Z0L ZKZRZ0ZR a
1436 8
Counter attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0a0s opo0ZpZ0 0ZqZpZ0Z L0Z0Z0Zp 0ZPA0Z0Z Z0Z0Z0O0 PO0Z0O0O S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1441 8 7 6 5 4 3 2 1
1444
0Zrs0j0Z opZbapo0 0Z0ZpZ0Z l0Z0o0OQ 0Z0Z0O0O Z0MBZ0Z0 POPZ0Z0Z ZKZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1446
rZbZkZ0s oplnZpo0 0Z0apZ0o Z0ZnM0Z0 0Z0Z0Z0Z Z0ZBZNA0 POPZQOPO Z0JRZ0ZR a
c
rZ0lrZkZ o0Z0Zpa0 0o0o0mpo Z0oPZ0Z0 PmNZPOPO Z0M0Z0Z0 0O0Z0Z0Z S0AQS0J0 a
1443 8
b
1445
rZbl0skZ ZpZnopap nZpo0ZpZ o0ZPZ0Z0 PZPZPOPO Z0M0A0Z0 0O0ZBZ0Z S0ZQJ0MR a
0ZblrZkZ s0Z0ZpZ0 po0o0ZpZ Z0oPmPZp PZPaNZnZ Z0ZBZ0MP 0O0A0ZPZ S0ZQZRZK a
1442 8
Counter attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0skZ opZ0Zpo0 0Z0ZpZ0o ZqZpO0ZP 0m0Z0Z0S ZNZPZ0L0 PO0S0OPZ ZKZ0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1447 8 7 6 5 4 3 2 1
1450
0Zrl0skZ ZpZbZpa0 pZ0o0mpZ Z0ZNZ0AP 0Z0oPZ0O ZnZ0ZPZ0 POPZQZ0Z ZKZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1452
rZ0ZkZ0s o0ZnZ0Z0 0Z0aplnZ Z0ZpZ0Z0 0Z0OBZpo Z0L0Z0O0 PA0M0O0O S0Z0ZRJ0 a
c
rZ0l0skZ Z0Z0apop 0Z0obZ0Z o0m0oPZ0 0o0ZPZPZ ZPZ0ZQZP PAPZNZBZ Z0JRZ0ZR a
1449 8
b
1451
0ZrZ0Z0j Z0Z0o0Z0 0Z0oQZpa opZPZPZ0 0ZqZ0Z0Z ZPZ0ZPZ0 PZPZRZ0Z ZKZ0Z0Z0 a
0Z0ZrZkZ ops0Zpap 0Z0o0ZpZ l0ZPZ0L0 0Z0oNZPZ ZPZ0ZPZ0 PZ0Z0Z0Z ZKZRZ0ZR a
1448 8
Counter attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZbZ0skZ ZrZ0ZpZp pZ0o0mpL Z0oPm0OP NlpZ0Z0Z Z0Z0ZPZR PO0ZNZ0Z ZBJ0Z0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1453 8 7 6 5 4 3 2 1
1456
rZrZ0Z0Z o0Zbokap 0Z0o0m0Z Z0Z0Z0O0 0o0MPZ0Z Z0Z0APZ0 qOPL0Z0Z ZNJRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1458
0ZrZ0Z0Z o0Z0ZQZ0 kZbApZ0Z Z0Z0O0Z0 pZnl0Z0Z Z0Z0ZBZ0 0ZPs0ZPZ ZRZRJ0Z0 a
c
0Z0Z0skZ Z0o0Z0a0 rZ0Z0lpZ ZpZ0o0Z0 pZ0ZPZ0Z ZPZPZNZR 0OPZQORZ ZKZ0Z0Z0 a
1455 8
b
1457
rZ0Z0Zrj ZpZblpmp 0Z0o0a0A oBmPo0ZP 0Z0ZPZ0Z Z0M0ZQZ0 PO0Z0Z0Z S0Z0JNS0 a
0Zks0Z0s ZRo0Z0Zp 0Z0Z0ZpZ Z0Z0o0Z0 0Z0ZPZ0Z Z0oqm0ZP PZ0ZQZPJ Z0S0Z0Z0 a
1454 8
Counter attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rlrZ0ZkZ o0Z0opap 0Zbo0mpZ Z0Z0Z0Z0 0o0MPZPO Z0Z0APZ0 POPLNZ0Z Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1459 8 7 6 5 4 3 2 1
1462
0Z0snskZ ZpZ0Zpop pZblpZnZ Z0Z0M0O0 0ZPO0O0Z ONZBZ0ZR 0L0Z0Z0O Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1464
rZ0Z0skZ ZpZqZpop 0ZpZnZ0Z Z0ZpOQA0 pZ0O0Z0Z O0Z0S0Z0 0O0Z0OPO S0Z0Z0J0 a
c
rmbl0skZ opZ0apop 0Z0ZpZ0Z Z0opO0Z0 0Z0O0Z0Z Z0MBZ0ZQ POPZ0OPO S0Z0J0MR a
1461 8
b
1463
rZbl0skZ o0ZpZpop 0o0Zpm0Z Z0m0Z0M0 0ZPZ0Z0Z O0A0Z0Z0 0OQZPOPO S0Z0JBZR a
rZ0Z0skZ ZbZ0Zpop pZ0o0m0Z Zpl0o0Z0 0Z0ZPZ0L Z0MBS0Z0 POPZ0OPO Z0Z0ZRZK a
1460 8
Defence
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ Z0opZpop pZ0Z0m0Z ZpZ0O0Z0 0Z0Z0O0Z ZBO0Z0Z0 PZPZ0ZPO S0AQJ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1465 8 7 6 5 4 3 2 1
1468
0Z0s0skZ ZbZnZpap 0lpZpmpZ opZ0M0A0 PZ0O0L0Z ZBZ0Z0M0 0OPZ0OPO S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1470
rmbZ0skZ ZpZ0lpo0 0Z0ZpZ0Z Z0ZpO0MQ 0o0Z0Z0Z Z0O0Z0Z0 0o0Z0OPO ZRZ0J0ZR a
c
rZbZ0ZkZ opZnZpZp 0Z0Z0ZpZ Z0O0Z0Z0 0Z0ZrZ0Z ZPZ0M0Z0 PZ0ZBJPO Z0ZRZ0ZR a
1467 8
b
1469
0Zbs0skZ Zpl0Z0op papZ0o0Z Z0Z0m0Z0 RZ0ZBA0Z Z0ZNZ0O0 0OQZPO0O Z0Z0ZRJ0 a
rZ0l0skZ o0Z0Zpo0 0ZpZbZ0A Z0ZpZ0ZQ NZ0a0Z0Z ZPZBZ0O0 PZPZ0O0O Z0Z0S0J0 a
1466 8
Defence
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0srl0j Z0onZ0op 0o0ZRZ0Z o0Z0Z0M0 0ZPZ0oPZ ZPZ0Z0ZP PAQZ0ZKZ Z0Z0ZnZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1471 8 7 6 5 4 3 2 1
1474
0m0l0skZ s0Z0Z0Zp pZ0a0ZpZ ZpZbMPZ0 0ZpOpZ0Z Z0Z0O0ZQ PO0A0ZPZ ZBS0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1476
0ZQZRs0Z opZ0Z0ok 0ZnZ0Zpo Z0lpZrZ0 0Z0Z0Z0Z Z0O0ZNZP PO0Z0OPZ Z0Z0S0J0 a
c
rZ0ZkZ0s ZbZnZpop pl0ZpZ0Z ZpaNZ0A0 0Z0ZPZnZ ZBZRZNZ0 PO0ZQOPO S0Z0Z0J0 a
1473 8
b
1475
rZ0Z0s0Z ZbZqZ0Z0 0Z0Z0Znj ZNopa0ZN PZ0Z0Z0Z Z0Z0Z0ZR 0OQZ0OPZ Z0Z0ZRJ0 a
rZ0ZrZ0Z opZnapj0 0ZpZpm0o l0Z0M0Z0 0Z0O0A0O Z0OQZ0Z0 PO0Z0OPZ S0Z0S0J0 a
1472 8
Defence
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ opZ0Zpop 0Z0Z0Z0Z Z0ZPZ0Z0 0ZPS0ZnZ O0M0Z0O0 0OQZBOqO Z0Z0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1477 8 7 6 5 4 3 2 1
1480
rZbZ0s0j Z0Zpapo0 0ZnZNM0o o0Z0O0Z0 0Z0l0A0Z O0Z0Z0ZQ 0O0Z0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1482
rZ0Z0ZkZ opZ0Zpap 0mqZ0ZpZ Z0orO0M0 0Z0Z0Z0L Z0Z0Z0Z0 PO0Z0ZPO S0A0ZRJ0 a
c
0ZrZ0skZ Zbl0apop po0Z0Z0Z Z0mpO0Z0 0O0Z0OPZ M0S0ABZ0 PZ0Z0ZQO Z0Z0ZRJ0 a
1479 8
b
1481
rZ0Z0s0Z opZ0oNak 0Zno0Zpo Z0ZQZRZ0 0ZPZ0Z0Z Z0Z0A0Z0 qO0ZBZPO Z0ZRZ0J0 a
rZbZ0ZkZ opZ0Z0lp 0Z0ZpZ0Z Z0o0O0Z0 0ZPoQZpZ Z0ZBZ0O0 PO0Z0ZKO Z0Z0ZRZ0 a
1478 8
Defence
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrl0skZ obZ0ZpZp 0o0ZpapZ Z0ZpZ0ZR 0ZPO0Z0Z OPZ0Z0ZR 0A0Z0OPO Z0ZQZBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1483 8 7 6 5 4 3 2 1
1486
0ZrZ0ZkZ opZrZ0op 0Z0Z0Z0Z Z0l0opZ0 0Z0m0Z0Z ZPZRZPZ0 PZPLNZPO Z0ZRZ0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1488
rZbZkZ0s opZqZ0op 0o0opZnZ Z0ZNZ0AQ 0Z0Z0Z0Z Z0Z0Z0Z0 0OPZ0OPO S0Z0ZRJ0 a
c
0Z0sqskZ ZpZbapZp 0Z0o0ZpL o0ZNo0ZP 0ZPZnZ0Z Z0Z0ZNZ0 PO0ZBOPZ S0Z0J0ZR a
1485 8
b
1487
0Z0s0Z0j obZ0ZpoB 0o0Z0Z0Z Z0Z0Z0Z0 0lPZ0Z0Z ZPZ0Z0Z0 PZ0sQZPO Z0ZRZRZK a
0Z0s0j0Z Z0Z0apo0 pZ0o0Z0o l0Z0oPZ0 0m0Z0ZPZ Z0s0A0MQ PZPZ0Z0O J0S0ZRZ0 a
1484 8
Defence
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZblrZkZ o0s0Z0Z0 0o0ZpZ0o Z0ZpO0ZP PZpOnZPZ Z0O0ZRZ0 0ZPZQZBZ Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1489 8 7 6 5 4 3 2 1
1492
0s0Z0skZ o0Z0Zpo0 0Z0ZpZ0o Z0o0O0Z0 0ZPm0ZQM ZPS0Z0O0 QZ0Z0Z0Z Z0A0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1494
rZ0lnskZ o0ZpZ0op bo0Z0o0Z m0Z0ZPZQ 0ZPo0M0Z O0OBZ0Z0 0Z0Z0ZPO S0A0ZRJ0 a
c
0Zrs0ZkZ obZ0ZNo0 0o0Zpm0o Z0Z0Z0Z0 0Z0O0Z0Z Z0OQZ0S0 qZBZ0OPO Z0ZRZ0J0 a
1491 8
b
1493
0ArZ0akZ Z0Z0Z0o0 pZ0ZpZ0o ZpO0ZpZ0 0O0Z0Znl O0ZBObM0 0ZQZ0OPO Z0Z0SRZK a
rZ0Z0s0j opo0l0Zp 0ZnsbZpL Z0m0Z0ZP 0ZPZPZ0Z Z0M0ZNZ0 PO0ZBZPZ Z0JRZ0ZR a
1490 8
Defence
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0ZkZ Z0onZrap 0o0o0Z0Z Z0ZPo0o0 PMPZPm0Z Z0M0APO0 0Z0ZBZ0Z S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1495 8 7 6 5 4 3 2 1
1498
rZbl0ZkZ opZ0Zra0 0Z0o0mnZ ONZPo0Zp 0O0ZPo0Z Z0Z0ZPo0 0Z0ZBAPO Z0SQMRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1500
rZ0l0ZkZ opZ0mra0 0Zpo0ZpZ Z0ZPo0mp 0ZPZPo0O Z0MNZPZb PO0ZBA0Z S0ZQS0J0 a
c
rZbZ0skZ opo0l0a0 0Z0o0Z0Z Z0ZPo0o0 0ZPZPo0o Z0ZBZPm0 PO0ANMRZ S0ZQZ0J0 a
1497 8
b
1499
0s0ZnakZ Z0Z0Z0s0 pZ0o0Z0Z ZbZPo0lp 0ZNZPoPm L0Z0Z0ZP 0ORZBMPZ Z0S0A0J0 a
rZbZ0Zrj opo0ZnZp 0O0o0Z0Z ONOPs0Zn 0Z0ZPo0l Z0ZNZPoP 0L0Z0ZPZ S0S0ZBJ0 a
1496 8
Defence
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0snZkZ opo0Zpap 0ZnZbZpZ Z0ZNo0Z0 0ZPZPZ0Z Z0Z0ANZP PO0ZBOPZ S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1501 8 7 6 5 4 3 2 1
1504
0ZnZ0skZ ZRZ0Z0ap 0Z0o0m0Z M0oPo0o0 0ZPZ0o0Z Z0M0ZPZq 0Z0ZBZ0Z L0Z0A0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1506
rZbZ0s0j Zpo0Z0ap 0Z0o0Z0Z ZPOPo0Z0 0ZNZPo0l Z0M0ZPon 0ZQZBZ0O ZRZ0ARZK a
c
0Z0Z0Z0j Z0L0Z0a0 0Z0o0Zpo orZPl0Z0 0Z0ZNo0Z Z0Z0ZPZ0 0Z0Z0ZPO Z0S0Z0ZK a
1503 8
b
1505
rZ0l0s0j ZpobZ0Zp 0Z0O0ZpZ ZNZPopZ0 0O0ZPm0Z Z0S0ZPZ0 0ZQMBZ0Z Z0A0ZRJ0 a
rZbl0s0j Z0M0Z0an 0Z0Z0Z0Z o0LPo0Zp PZ0ZPo0Z Z0Z0ZPo0 0Z0MBZPO ZRZ0ZRJ0 a
1502 8
Defence
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0s0j ZpM0Z0ap 0Z0o0ZqZ Z0ZPo0o0 0O0ZPZPZ Z0Z0Z0O0 0Z0MnJ0Z ZRAQZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1507 8 7 6 5 4 3 2 1
1510
rZbl0skZ ZpZ0m0a0 0Z0o0m0Z Z0ZPo0Zp 0ONZPo0Z Z0M0ZpZ0 0Z0ZBAPO Z0SQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1512
rZbZka0s Zpl0Z0Z0 pZ0o0O0Z Z0Z0Z0o0 0Z0LPZ0Z Z0Z0Z0M0 POPZ0ZPO S0Z0S0J0 a
c
0Z0Z0s0Z Z0spapZk pZ0ZbZpZ ZpZ0OpZ0 qZ0A0OPo O0Z0Z0ZP 0OPLBZ0Z ZKZRZ0S0 a
1509 8
b
1511
rZbZ0ZkZ opZ0Z0o0 0Z0apZ0o Z0ZpZ0Z0 0Z0M0Z0l Z0Z0Z0MP PO0A0sPZ ZBSQZ0J0 a
0Z0s0ZkZ o0l0ZpZ0 0o0M0Zpo m0ZQZ0Z0 0Z0Z0Z0Z O0O0Z0ZP 0Z0Z0OPZ Z0Z0S0J0 a
1508 8
Defence
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0ZkZ ZpZrZpa0 pZ0O0Z0o O0Z0SQZ0 0Z0SNZ0Z Z0Z0Z0Zp 0Z0ZqOPZ Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1513 8 7 6 5 4 3 2 1
1516
rZ0ZrZkZ oplnZ0o0 0Z0Zpa0o Z0ZpZ0Z0 0ZpO0O0Z O0M0ONZ0 0OQZ0ZPO Z0Z0SRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1518
rZ0ZkZ0s Zblnapop pZ0opZ0Z Z0Z0Z0OP No0M0Z0Z ZPZ0APZ0 0OPZQZ0Z Z0JRZ0ZR a
c
rZ0ZkZ0s ZqZbapop pZ0opZ0Z Z0m0Z0OP No0MPZ0Z ZPZ0A0Z0 0OPZQO0Z ZKZRZ0ZR a
1515 8
b
1517
0s0ZrZkZ Zbl0apop pZ0opZ0Z Z0m0Z0O0 0o0APO0O Z0ZBZ0M0 POPL0Z0Z ZKZRZ0ZR a
rZ0s0ZkZ ZbZ0Zpop pZ0ZpZ0Z m0l0Z0O0 0o0ZPZ0Z Z0ZBZNZ0 POPZQZ0O ZKZRZ0S0 a
1514 8
Attack with pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZkZ0s Z0lbapop pZ0opZ0Z Z0Z0Z0OP No0MnZ0Z ZPZ0A0Z0 0OPZQO0Z ZKZRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1519 8 7 6 5 4 3 2 1
1522
rZblrakZ ZpZnZpop pZ0ZpZ0Z Z0ZpO0Z0 0Z0M0OPZ ZPM0A0Z0 0OPZQZ0O ZKZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1524
rZ0lkZ0s ZbZnapo0 pZ0ZpZ0o Z0mpO0Z0 0o0M0OPO Z0Z0A0Z0 POPLNZBZ Z0JRZ0ZR a
c
rZ0l0s0Z opZ0opjp 0ZnobZpZ Z0Z0Z0Z0 0Z0ZPOPO Z0M0Z0Z0 POPLBZ0Z S0Z0J0ZR a
1521 8
b
1523
rZ0ZrZkZ Z0lbapop pZnopZ0Z Z0Z0ZPO0 0o0MPZ0Z ZPM0A0Z0 0OPZQZ0O ZKZRZ0S0 a
0ZrZ0skZ Zbl0apop pZ0opZ0Z Zpm0m0O0 0Z0MPZ0O O0M0APZ0 0OPZ0L0Z ZKZRZBZR a
1520 8
Attack with pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZbZkZ0s Z0l0apo0 pZ0opZ0Z Z0Z0Z0O0 0Z0ZPOQO ZrM0Z0Z0 0ORZ0Z0Z S0A0J0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1525 8 7 6 5 4 3 2 1
1528
rZbZ0skZ Z0lnapop ponopZ0Z Z0Z0Z0Z0 PZ0ZPOPZ ZNMBAQZ0 0OPZ0Z0O S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1530
0Z0l0s0j Z0sbapop pZ0opm0Z ZpZ0m0ZP 0Z0MPZPZ Z0MBAPZ0 POPL0Z0Z ZKZRZ0ZR a
c
rZ0ZrZkZ Z0Z0apop pZbopZ0Z Z0m0Z0OP 0l0APO0Z Z0ZBZQZ0 0OPZNZ0Z Z0JRZ0ZR a
1527 8
b
1529
0sbZ0skZ Z0l0apop pZ0opZ0Z Z0Z0m0OP 0o0APZ0Z Z0Z0ZPZ0 POPLNZ0Z ZKZRZBZR a
qZ0ZrZkZ Zbs0apop pZ0Z0Z0Z Z0Z0o0OP 0onAPZ0Z Z0ZBZ0M0 POPZ0L0Z ZKZRZ0ZR a
1526 8
Attack with pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0ZkZ Zblnapop pZ0opZ0Z Z0Z0Z0ZP NonAPOPZ ZNZ0Z0Z0 POPZ0L0Z Z0JRZBS0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1531 8 7 6 5 4 3 2 1
1534
0Z0s0m0j ZbZnZpop 0l0ZpZ0Z Z0apO0OP rZ0M0O0Z OpZBA0Z0 0O0ZNZQZ ZKZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1536
rZbZ0skZ Z0Z0apop pZ0opZ0Z lpm0Z0O0 0Z0LPO0O ZBM0A0Z0 POPZ0Z0Z Z0JRZ0ZR a
c
0s0ZrakZ Z0lbZpop pmnopZ0Z ZpZ0Z0O0 0Z0MPO0O ZPZ0ABZ0 PZPLNZ0Z ZKZRZ0ZR a
1533 8
b
1535
0lrZrakZ obmnZpop 0o0opZ0Z Z0Z0Z0O0 0ZPZPO0O O0M0ABZ0 0O0M0ZQZ Z0S0ZRJ0 a
rZbl0skZ ZpZnopap pZ0o0mpZ Z0Z0Z0Z0 0Z0ZPOPZ ZNM0Z0Z0 POPZBZ0O S0AQJ0ZR a
1532 8
Attack with pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblrmkZ Z0Z0apop pZ0opZ0Z mpZ0Z0OP 0Z0MPO0Z Z0M0A0Z0 POPZQZBZ Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1537 8 7 6 5 4 3 2 1
1540
rZ0l0skZ Z0ZnZpap pZnopZpZ ZpZ0Z0O0 0Z0ZPO0O Z0OBMQZ0 PO0Z0Z0Z S0A0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1542
0s0Zka0s Z0lbZpop 0ZnopZ0Z Z0m0Z0OP po0MPO0Z Z0Z0A0Z0 POPLNZBZ ZKZRZ0ZR a
c
0ZrZ0skZ Zbl0apop pZnopZ0Z Z0Z0Z0Z0 no0ZPOPZ ZNZ0A0Z0 POPZ0LBO ZKMRZ0ZR a
1539 8
b
1541
0Z0ZkZ0s ZbZnapop pl0opZ0Z Z0Z0Z0OP 0s0ZPO0Z ZNM0ZQZ0 0OPZ0Z0Z Z0JRZBZR a
rZ0ZrZkZ opZnapop 0ZbopZ0Z l0Z0Z0O0 0Z0APO0O Z0M0ZQZ0 POPZ0Z0Z ZKZRZBZR a
1538 8
Attack with pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ ZbZ0apop pZ0opZ0Z ZpZ0Z0OP 0m0ZPO0Z Z0MBAQZ0 POPZ0Z0Z S0Z0J0S0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1543 8 7 6 5 4 3 2 1
1546
rZbZrakZ ZplnZpop pZ0opZ0Z Z0Z0Z0OP 0m0ZPO0Z ZNMBAQZ0 POPZ0Z0Z Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1548
rZ0s0ZkZ ZpZbapop pZ0opZ0Z Z0l0Z0O0 0Z0ZPO0O O0M0Z0Z0 0OPL0Z0Z ZKZRZBZR a
c
rZrZ0ZkZ ZqZba0op 0Z0opZPZ o0m0Z0Z0 0oQMPZ0Z Z0Z0A0Z0 POPM0Z0O Z0JRZ0S0 a
1545 8
b
1547
0s0ZrZkZ Zbl0Zpop pZ0ZpZ0Z Z0apO0OP 0Z0M0O0Z Z0O0ARZ0 0O0Z0Z0L Z0Z0S0J0 a
0Z0mnZkZ Z0l0ZrZp rZ0opZpZ Z0Z0O0Z0 poNZ0O0S Z0ZQZ0Z0 POPZ0Z0O ZNJRZ0Z0 a
1544 8
Attack with pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZrZba0Z Z0lnZpZk pZ0opZpO ZpZ0Z0A0 0Z0SPZ0Z ZBM0ZQZR POPZ0O0O Z0J0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1549 8 7 6 5 4 3 2 1
1552
rZ0ZkZ0s Z0ZnopZp 0Z0o0mpL o0Z0Z0Z0 0oqZPM0Z ZNZ0ZPZ0 POPZ0ZPO ZKZRZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1554
0srZnZkZ Z0Z0lpop 0ZbopZ0Z Z0Z0O0ZN po0M0ZPZ Z0Z0ZPZ0 POPL0Z0O ZKZRS0Z0 a
c
rZ0ZrZkZ Z0ZbZpap 0l0ZnZpZ Z0ZpZ0O0 po0O0Z0O Z0ZBO0M0 PO0LNO0Z ZKZRZ0ZR a
1551 8
b
1553
0ZrZ0skZ Z0l0apop pZ0o0m0Z Z0ZBoPZ0 0o0ZPZ0Z Z0Z0Z0M0 POPZQZPO Z0JRZ0ZR a
rZ0Z0s0j Z0Z0Z0op 0ZnZqa0Z o0Z0o0Z0 0o0oNZ0O Z0ZQZPZ0 POPA0ZPZ ZKZRZ0ZR a
1550 8
Attack with pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ Z0l0apo0 pZ0Z0m0o m0ZpZPZ0 0o0ZpO0Z ZBZ0A0ZP POPLNZPZ ZKZRS0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1555 8 7 6 5 4 3 2 1
1558
0Z0Z0skZ Z0Z0Z0Zp pZparZ0Z Z0ZRZpZq 0Z0O0obZ ZBO0A0O0 0O0M0Z0O Z0Z0SQJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1560
0Zks0a0s opZbZqZp nZpo0mpZ Z0Z0Z0Z0 0ZPM0M0Z O0Z0Z0O0 0O0Z0OBO S0AQZRJ0 a
c
0Zks0Z0s opZ0apop nlpZbZ0Z Z0ZpZ0Z0 0Z0O0O0Z Z0OBM0Z0 PO0A0ZPO S0ZQZRJ0 a
1557 8
b
1559
0j0s0Z0s opo0mpaq 0Zno0Z0o Z0Z0Z0Z0 0ZBOPZ0M Z0O0Z0AQ PO0M0Z0O Z0Z0ZRJ0 a
0Zks0Z0s opo0Zpop 0lnZpa0Z Z0Z0Z0Z0 0ZPO0ZnZ ZPZ0ANM0 PZ0ZQOPO SRZ0Z0J0 a
1556 8
Attack with pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rmblkZ0s ZpZ0apZ0 pZ0o0ZpZ Z0oPo0Zn 0ZPZPZ0o Z0MBA0Z0 PO0ZNOPO S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1561 8 7 6 5 4 3 2 1
1564
rZ0ZkZ0s oblnapo0 0o0ZpZ0o Z0opO0Z0 0Z0Z0Z0Z Z0OBONA0 PO0Z0OPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1566
0ZrZka0s opZbZpo0 0lnZpZ0o Z0ZpZ0Z0 0Z0OnZ0A Z0M0ONZ0 POQZBOPO S0S0Z0J0 a
c
rZ0l0skZ Z0Z0apop pZbopZ0Z ZpZ0m0O0 0Z0ZPZ0O Z0M0APZ0 POPL0Z0Z Z0JRZBZR a
1563 8
b
1565
rZblka0s opZ0ZnZp 0ZpZ0opZ Z0o0o0Z0 0Z0ZPZ0Z Z0OPANZP PO0Z0OPZ SNZQZRJ0 a
0Zks0a0s Z0o0ZpZp boqZpZpZ o0ZpOnZ0 PZ0O0M0Z Z0Z0A0Z0 0OPZNOPO S0ZQS0J0 a
1562 8
Attack with pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbs0ZkZ Z0l0apop pZ0opZ0Z Zpm0m0O0 0Z0MPZ0O ZNZ0APZ0 POPZ0L0Z ZKZRZBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1567 8 7 6 5 4 3 2 1
1570
0m0Zrs0Z S0o0l0Zk 0oPo0Z0o ZPZBapZ0 0ZPZ0A0O Z0Z0Z0O0 0ZQZ0ZKZ Z0Z0S0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1572
rZ0lkZ0s Z0ZnapZp pZbZpZpZ ZpZpO0Z0 0Z0A0O0Z Z0O0LNZ0 POBZ0ZPO S0Z0ZRJ0 a
c
0ZkZ0s0s Z0o0Z0Zp pZ0aqm0Z Z0o0o0o0 PZNZPo0Z ZRZPZ0ZP 0ZPAQOPZ S0Z0Z0J0 a
1569 8
b
1571
0Z0ZbskZ Z0s0l0Zp pM0o0opZ Z0oPZ0Z0 0OPZPZ0Z O0Z0ZNmP 0Z0L0SPZ Z0Z0S0J0 a
rm0Zka0s o0ZnZpZp bopZpZpZ Z0ZpO0Z0 0Z0O0O0Z l0MBARZ0 PZPZNZPO S0ZQZ0J0 a
1568 8
Pawn breakthrough
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0arj opo0ZnZ0 0Z0o0mpo OPOPo0Z0 0ZNZPo0Z A0M0ZPZ0 0Z0ZBZPO S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1573 8 7 6 5 4 3 2 1
1576
rs0Z0ZkZ Z0lbm0ap po0o0m0Z Z0oPo0o0 POPZPo0Z Z0MNZPZ0 0Z0ABZPO ZRZQZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1578
rZ0lnakZ opobmrZp 0Z0o0Z0Z ZPOPo0o0 PZNZPo0Z Z0M0ZPZ0 0Z0ZBAPO S0ZQZRJ0 a
c
0ZrZ0Z0s lpZ0apj0 pZbZpZpZ Z0M0O0Zp 0OpO0O0O O0M0L0O0 0Z0Z0J0Z ZRS0Z0Z0 a
1575 8
b
1577
rZbZqs0j o0Z0Z0ap 0ZNo0m0Z Z0oPo0o0 QZPZPZ0Z Z0Z0ZPoP PS0Z0ZPZ ZRABZ0J0 a
rm0l0skZ opZ0Z0ap 0mpZ0ZpZ Z0ZpO0Z0 0Z0O0OpZ ZPM0A0Z0 PZ0LNZ0O S0Z0ZRJ0 a
1574 8
Pawn breakthrough
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Z0j Z0ZnZrZp ro0Zpo0a m0ZpO0Z0 Po0O0O0Z ZPZ0ANZP 0Z0ZNJRZ ZRZ0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1579 8 7 6 5 4 3 2 1
1582
0Z0s0a0s L0Z0Z0op 0okZpZ0Z o0o0m0Z0 PZqZ0M0Z Z0Z0A0Z0 0O0Z0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1584
rZ0lka0s ZpZbZpo0 0m0ZpZ0Z m0ZpO0Zp pZ0O0O0Z O0ZBZNZ0 0O0ZNZPO S0A0LRJ0 a
c
0Z0Z0l0Z Z0ZbZkop 0Z0Zpo0Z ZpZpO0Z0 nO0M0OPO Z0ZPLNZ0 0Z0ZKZ0Z Z0Z0Z0Z0 a
1581 8
b
1583
0ZrZ0Z0Z ZpZbmpj0 0Z0ZpZpZ l0ZpO0Zp Po0O0O0Z ZPZBZNOP 0Z0L0J0Z ZRZ0Z0Z0 a
0ZrZ0skZ o0ZnapZp 0o0ZpZpZ m0ZpO0Z0 0Z0O0O0Z OqM0ZQO0 0O0Z0SBO S0A0Z0J0 a
1580 8
Pawn breakthrough
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0s0Z lpZbZ0j0 0ZnZpZpZ o0ZpO0Z0 0Z0Z0O0Z O0Z0ZNM0 0Z0Z0ZPO S0L0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1585 8 7 6 5 4 3 2 1
1588
rZ0lrZkZ ZpZ0apZp pZ0ZpZpZ ZbZpO0Z0 0Z0A0O0Z Z0O0ZRZ0 POBZ0LPO S0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1590
0Z0snmkZ ZrlbZ0op 0o0o0o0Z oPZ0oPZ0 0ZPZPZPL O0S0A0Z0 0Z0ZBZ0O Z0ZRZNJ0 a
c
0Z0l0ZkZ Z0o0o0ap 0o0ZPZpZ Z0OPm0A0 rZ0Z0Z0Z Z0Z0Z0O0 0Z0LPZBO Z0Z0ZRJ0 a
1587 8
b
1589
rZrZ0ZkZ Z0Z0Zpop 0Sbopm0Z o0Z0Z0Z0 PZPO0Z0Z Z0MBZPZ0 0Z0J0ZPO Z0Z0S0Z0 a
0ZrZ0j0s ZpZqZ0o0 0ZnOpm0Z o0ApZpZp PZ0Z0O0Z Z0Z0ZBZP 0OPZ0LPZ Z0JRS0Z0 a
1586 8
Pawn breakthrough
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZnl0skZ opo0apZp 0ZnZpZpZ Z0OpO0Z0 0Z0O0O0Z Z0MBA0ZP PO0Z0O0Z S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1591 8 7 6 5 4 3 2 1
1594
rmnZqa0j ZpZ0s0Zp 0ZpZpZpZ o0OpO0Z0 NZ0O0OBZ Z0Z0Z0ZQ PO0A0S0O Z0Z0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1596
rZ0Z0s0Z ZbZ0l0jp pm0o0opZ Z0o0Z0Z0 0o0ZPZNZ ZPm0ZNO0 PZ0L0OBO S0Z0S0J0 a
c
0ZrZ0j0s o0Z0Zno0 0ono0Z0Z Z0ZNZ0lp 0ZPZ0Z0Z ZQZ0Z0oP PO0Z0ZBZ ZRZ0ZRJ0 a
1593 8
b
1595
0s0Z0s0Z Z0ZbZkmR pZ0o0opZ mpoPZ0Z0 0ZPZPZ0Z Z0M0Z0M0 PO0ZBZPZ Z0J0Z0ZR a
rZnlkZns Z0Z0Zpap 0o0o0ZpZ oNZPo0Z0 PZPZ0Z0Z ZBZ0AQZP 0O0Z0OPZ S0Z0J0ZR a
1592 8
Pawn breakthrough
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0Z0s o0Zqm0a0 Popo0opm Z0Z0Z0Z0 0ZPZPZ0Z S0Z0MNO0 0O0Z0ZKO Z0AQZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1597 8 7 6 5 4 3 2 1
1600
0Z0Zrs0Z o0Z0j0a0 0o0oBZ0o ZRZ0ZPo0 0ZPZ0ZPZ Z0Z0Z0Z0 PO0Z0OPZ Z0JRZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1602
0Zblnanj s0Z0ZrZp 0o0o0opZ o0oPZ0O0 PZPZPA0Z ZPLBZNMP 0Z0Z0S0Z Z0J0ZRZ0 a
c
rZbZ0Z0s Z0l0j0ap po0opo0Z Z0Z0Z0Z0 PZ0LPZ0Z Z0M0Z0Z0 0OPZBZPO S0Z0JRZ0 a
1599 8
b
1601
0Zbs0Z0Z Z0Z0ZkMp pZpo0o0O a0o0ZPo0 0Z0ZPZPZ Z0M0Z0Z0 POPZKZ0Z Z0ZRZ0Z0 a
rZbl0skZ ZpZ0o0Z0 0O0o0opZ o0mNZ0Z0 0ZPLPZ0Z Z0Z0Z0Z0 PZ0ZBZPO Z0ZRZRZK a
1598 8
Pawn breakthrough
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ Zbo0Z0op 0ono0a0Z o0ZNZpZ0 0ZPZnZ0Z Z0Z0ANO0 POQZPOBO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1603 8 7 6 5 4 3 2 1
1606
rm0ZkZ0s Z0o0lpo0 0o0o0m0Z o0ZPo0Zp 0ZPZPZbZ ZQZ0ZNO0 PO0M0OBO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1608
rl0ZkZ0s obZ0apop 0onopm0Z Z0Z0Z0Z0 0ZPZPA0Z ONM0Z0Z0 0OQZBOPO Z0ZRJ0ZR a
c
0Z0Z0skZ Zblnm0op 0o0o0Z0Z Z0ZPopZ0 0ZPZPZ0Z Z0ZNZ0O0 0L0M0OBO ZRZ0Z0J0 a
1605 8
b
1607
0Z0Z0Z0Z Z0Z0Z0Zb 0o0o0Z0j oPZPspsP 0ZPZpJPZ Z0Z0M0Z0 PZ0ZBZ0Z Z0Z0ZRZ0 a
0j0s0Z0s obo0ZqZ0 0o0o0Zpo Z0Z0o0Z0 QZPZPm0Z Z0O0MPA0 PZ0S0ZPO Z0JRZ0Z0 a
1604 8
Pawn breakthrough
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZnl0skZ opo0ZpZp 0Z0ZpZpZ mPOpO0Z0 0Z0O0O0a Z0MBA0Z0 PZ0Z0O0O S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1609 8 7 6 5 4 3 2 1
1612
0ZrZkZ0s Z0ZbapZp pl0opo0Z mpZ0ZPZ0 0Z0ZPZ0Z Z0M0ZNO0 POPL0Z0O ZKZRZBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1614
rZkZnZ0Z ZbZ0ZpZ0 pZpOpZpZ ZpA0Z0Zp PZPZ0O0Z ZPZ0ZRZ0 0Z0ZBZPO Z0Z0Z0J0 a
c
rZ0s0ZkZ opl0apm0 0ZbZpZpZ Z0ZpO0Zp 0Z0Z0O0Z ZPZ0Z0MN 0OPAQZPO Z0Z0SRZK a
1611 8
b
1613
rZ0Z0skZ Zbl0Zpa0 0Z0opZpZ o0mnO0Zp 0o0Z0ONL O0ZBZNZ0 0OPA0ZPO S0Z0ZRZK a
rm0Zka0s ZplnZpZp pZ0ZpZpZ Z0opO0Z0 0O0Z0O0Z O0MBA0LP 0ZPZ0ZPZ Z0Z0SRJ0 a
1610 8
Pawn breakthrough
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rlbZnskZ ZpZpZ0Zp pZ0ZpapL Z0Z0Z0Z0 0Z0A0O0Z ZNZBZ0Z0 POPZ0ZPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1615 8 7 6 5 4 3 2 1
1618
rZqZkZ0s ZpZbapZp pAnZpZpZ Z0ZpO0Z0 0Z0Z0O0Z Z0MBZ0L0 POPZ0ZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1620
0Z0lkZ0s s0ZnapZp 0o0ZpZpZ m0opO0Z0 pZ0O0O0Z O0O0ANZN 0O0ZQZPO Z0Z0SRJ0 a
c
0Z0Z0ZkZ Z0Z0Zpop pZ0ZpZ0Z Z0ZpZ0O0 Po0ZrO0L Z0sRZ0Z0 0ZPZ0S0O l0Z0ZNJ0 a
1617 8
b
1619
rZ0s0ZkZ o0Z0ZpZp 0ZbZpOpZ Z0Z0Z0Z0 0Z0A0O0Z Zqo0L0Z0 0Z0Z0SPO Z0Z0S0J0 a
rZ0ZkZ0s opZnapZ0 nZpZpZpZ l0Z0Z0Op 0Z0ONO0O Z0Z0A0ZB POPZQZ0Z S0Z0ZRJ0 a
1616 8
Pawn breakthrough
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0ZkZ opZrlpZp 0ZpZpapZ Z0Z0Z0Z0 PZPOQZPZ ZPZRA0Z0 0Z0Z0OKO Z0ZRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1621 8 7 6 5 4 3 2 1
1624
rZ0l0skZ opZ0apop 0Z0Z0m0Z Z0Z0o0A0 0Z0mPZ0Z Z0M0ZPZP POPL0Z0Z Z0JRZBS0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1626
rmbZka0s ZpZ0Zpop pZ0ZpZ0Z Z0ZqZ0Z0 0Z0M0Z0Z Z0Z0A0Z0 POPZBOPO S0ZQJ0ZR a
c
rm0l0skZ opZbapop 0Z0opm0Z Z0Z0Z0Z0 0Z0MPZ0Z O0M0Z0Z0 BOPZ0OPO S0AQZRJ0 a
1623 8
b
1625
rm0Zkans opZ0opop 0Zqo0Z0Z Z0Z0Z0Z0 0ZPM0Z0Z Z0Z0Z0Z0 PO0Z0OPO SNAQS0J0 a
rZbZ0skZ o0o0ZpZp 0ZpZpA0Z Z0ZqZ0Z0 0Z0O0Z0Z O0Z0Z0Z0 0OPZ0OPO S0ZQJ0ZR a
1622 8
Pawn hunt
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrlka0s Z0ZbZpop pZ0opm0Z ZpZ0Z0Z0 0ZnMPZ0Z O0M0Z0O0 0OPZQOBO Z0ARZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1627 8 7 6 5 4 3 2 1
1630
ra0Z0skZ o0Znl0op bopZpZ0Z Z0OpZpZ0 0Z0OnZ0Z ZNZNA0O0 POQZPOBO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1632
rZ0l0skZ ZpobZ0ap 0Z0onm0Z oNZ0ZpZ0 0ZPZ0Z0Z Z0M0ZPO0 POQZ0A0O S0ZRZBJ0 a
c
rZbs0ZkZ Z0o0Zpa0 pmpZ0Zpo Z0Z0Z0Z0 0Z0MRZ0Z Z0Z0ZPZP PO0ZBAPZ Z0JRZ0Z0 a
1629 8
b
1631
rZbZrZkZ opZnZpZp 0Zpo0lpZ Z0Z0Z0Z0 0ZPaPZ0Z Z0M0A0Z0 PO0Z0OPO ZRZQSBJ0 a
rZ0ZrZkZ opZ0Zpap nlpobmpZ Z0Z0Z0Z0 0ZPZPZ0Z Z0M0MPZ0 PO0LBZPO S0A0ZRJ0 a
1628 8
Pawn hunt
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0s0j Z0ZqZpap pZ0obZ0Z Z0ZNo0ZQ 0ZBZPo0Z ZPZ0Z0Z0 PZRZ0OPO Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1633 8 7 6 5 4 3 2 1
1636
rZ0s0ZkZ o0Z0Zpo0 0ZpZ0Zqo Z0MpZbm0 0Z0Z0Z0Z ZPZ0ZPL0 PAPS0ZPO Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1638
0ZrZkZ0s mpZbapo0 0l0ZpZ0Z o0ZpOPZp 0ZnO0Z0Z O0MBZNZP 0O0Z0ZPZ S0A0LRZK a
c
rZbZ0lkZ opo0Z0s0 0Z0a0ZnS Z0ZPo0ZQ 0Z0ZNZPZ Z0O0ZPZ0 PO0Z0Z0Z Z0JRZBZ0 a
1635 8
b
1637
0s0l0s0j Z0ZbZ0Zp 0Zno0Z0a o0ZNZpZ0 ROBZpZ0Z Z0O0Z0O0 0ZNZQO0O S0Z0Z0J0 a
0Z0srZkZ opZ0Z0op 0Z0l0m0Z Z0ZpSQZ0 0Z0O0M0Z O0Z0Z0O0 0Z0Z0O0O Z0Z0ZRJ0 a
1634 8
Pawn hunt
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rmbZ0skZ Zpl0apop pZ0opm0Z Z0Z0Z0Z0 0Z0MPO0Z Z0M0Z0L0 POPZBZPO S0A0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1639 8 7 6 5 4 3 2 1
1642
0m0ZrakZ Zrl0Zpop po0ZpZ0Z Z0Z0O0Z0 PZ0ANL0Z Z0Z0Z0ZP 0OPZ0ZPZ Z0ZRZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1644
0s0Z0skZ o0Z0Zpa0 0ZpopZpZ l0Z0m0Zp 0Z0ZPZ0O ZPM0Z0L0 PZPZBZ0Z Z0ZRJ0AR a
c
0Z0Z0ZkZ opZ0o0mp 0Z0opZ0Z sqZ0Z0OB rZ0ZPZ0Z O0O0ZPZ0 0ORZ0Z0L J0Z0Z0ZR a
1641 8
b
1643
rZbZ0skZ o0Z0opZp 0l0Z0ZpZ Z0ZpZ0Z0 0Z0L0Z0Z Z0Z0ZPZ0 POPZ0ZPO Z0JRZBZR a
rZ0s0ZkZ opLBZpap 0Z0Z0lpZ Z0Z0o0Z0 0Z0ZPZ0Z O0Z0ZPZ0 0OPZ0ZnO ZKARZ0ZR a
1640 8
Pawn hunt
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ o0Z0mpa0 0opZqmpo ZPZ0o0Z0 0ZPZPZ0Z ANM0ZQO0 PZ0Z0O0O ZRZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1645 8 7 6 5 4 3 2 1
1648
0Z0srZkZ o0Z0apo0 0ZpZ0l0o Z0ZpZ0Z0 0Z0ZPZnZ Z0M0Z0Ob POQZ0O0O S0ZRA0JB a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1650
rm0Z0skZ Zbl0apop po0opm0Z Z0Z0Z0Z0 0ZPMPZPZ Z0M0A0Z0 PO0Z0OBO S0ZQS0J0 a
c
0Z0s0ZkZ o0snZpo0 0ZpapZ0Z ZpZ0ZqZp 0ZPO0O0Z Z0A0Z0OP PO0Z0ZBJ Z0ZQSRZ0 a
1647 8
b
1649
rm0lka0s obZ0opop 0o0o0m0Z Z0o0Z0Z0 0Z0OPZ0Z ZPM0ZNZ0 PAPZ0OPO S0ZQJBZR a
0jrs0Z0Z ZbZnZ0o0 0Z0Z0o0Z Z0l0o0ZP po0ZPZ0Z Z0Z0ZBZ0 POPM0Z0Z ZKS0ZRL0 a
1646 8
Pawn hunt
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0ans Zpo0Zpop pZpl0Z0Z Z0Z0o0Z0 0Z0ZPZ0Z Z0O0ZQZP PO0O0OPZ SNA0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1651 8 7 6 5 4 3 2 1
1654
rZbZ0skZ opZpZ0op 0l0Zpa0Z ZNZ0mpZ0 0LPZ0Z0Z Z0Z0M0O0 PO0ZPOBO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1656
0Z0lnskZ ZpobZpop rm0Z0Z0Z Z0ZpZ0Z0 pZ0O0OPa O0M0OQMP 0O0Z0ZBJ S0A0ZRZ0 a
c
rm0lkZ0s obopZ0Zp 0o0ZpmpZ Z0Z0ZpZ0 0aPOPZ0Z Z0MBZPZ0 PO0ZQZPO S0A0J0MR a
1653 8
b
1655
0s0s0Z0j Z0Zna0op poqZpo0Z Z0ZbZ0Z0 PO0ANO0Z Z0O0ZBL0 0Z0Z0ZPO Z0ZRS0ZK a
rZbl0ZkZ ZpZ0spZ0 pZ0o0Z0o O0oPZ0o0 0ZnMPZnZ Z0ZBZ0Z0 0O0Z0OPO S0AQZRJ0 a
1652 8
Pawn hunt
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrs0ZkZ obZ0ZpZp 0onZplpZ ZBZ0Z0ZP 0Z0OPZ0Z Z0Z0LNZ0 PZ0Z0OPZ ZRZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1657 8 7 6 5 4 3 2 1
1660
rmblrZkZ ZpZpZpop 0o0Z0m0Z Z0ZPZ0Z0 0O0Z0Z0Z O0Z0Z0ZP 0Z0ZNOPZ S0AQJBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1662
0ZkZ0s0Z opZ0m0Z0 0ZpoPopZ lPZ0Z0o0 PZBZ0Z0Z Z0Z0Z0ZP 0L0Z0O0O Z0S0Z0J0 a
c
rZ0lkans Zpo0Z0op pZpZ0o0Z Z0Z0Z0Z0 0Z0OPZ0Z Z0Z0ZQZ0 PO0Z0OPO SNA0ZRJ0 a
1659 8
b
1661
0Z0Z0ZkZ Z0Z0spo0 0Z0Z0Z0o ZpZ0l0Z0 0ZbZ0ZQZ O0O0ZNZP 0Z0Z0OPZ Z0ZRZ0J0 a
0s0l0skZ Z0Z0Zpap pZ0o0Z0Z Z0ZBo0ZQ 0m0ZPo0Z MPZ0Z0Z0 PZ0Z0OPO Z0SRZ0J0 a
1658 8
Pawn hunt
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lkZ0s Zpo0apZ0 pm0Z0obZ Z0ZPoBZp 0Z0ZNZ0O Z0Z0ZQM0 PO0Z0OPZ Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1663 8 7 6 5 4 3 2 1
1666
rZblkZns opZnZpap 0Zpo0ZpZ Z0Z0Z0Z0 0Z0MPO0Z Z0M0Z0Z0 POPZBZPO S0AQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1668
rmbZ0Z0L opokZpZp 0Z0ZpZ0Z Z0ZpO0Z0 0Z0Z0l0Z Z0Z0Z0Z0 POPZ0OPO ZKZ0ZBMR a
c
rZ0Z0skZ opobZpo0 0Z0Z0l0o Z0ZPo0Z0 0ZQZ0Z0Z Z0O0ZPZ0 PZ0ZPZPO S0Z0JBZR a
1665 8
b
1667
rmbl0skZ opZ0mpap 0ZpZ0ZpZ Z0Z0Z0Z0 0Z0ZNM0Z Z0ZPZ0O0 POPZ0ZBO S0AQZRJ0 a
rZblka0s Z0Z0Zpop pZnZpm0Z ZpZ0Z0Z0 0Z0O0Z0Z ZBM0ZNZ0 PO0ZQOPO S0A0ZRJ0 a
1664 8
Pawn hunt
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0lkZ0s opo0Zpop 0Z0ZpZ0Z Z0Z0ZbZ0 0ZBOnZ0Z Z0O0ZNZ0 PZPZ0ZPO S0AQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1669 8 7 6 5 4 3 2 1
1672
0Z0s0ZkZ opl0Zpo0 0ZpMnZpZ Z0Z0O0Z0 rZ0O0Z0Z Z0Z0Z0ZR PO0Z0LPO Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1674
kZ0Z0Zrs opZqZpZ0 0mpZ0L0Z Z0Z0Z0A0 0ZPO0Zbo Z0ZBZ0Z0 PO0Z0OPJ Z0S0ZRZ0 a
c
0s0Z0akZ Z0Z0ZpZ0 0Z0o0ZpZ Z0ZPo0O0 pOQZPZ0Z J0Z0ZqZ0 PZ0ANZ0Z Z0Z0Z0Z0 a
1671 8
b
1673
rZbZ0s0Z ZpZ0Z0Zk po0Z0Zno Z0ZBo0l0 PONZPopZ Z0OQZ0Z0 0Z0Z0OPO Z0ZRS0J0 a
rm0l0skZ opa0Zpop 0ZpZ0o0Z Z0Z0Z0Z0 0Z0O0Z0Z Z0ZBZQZ0 POPZ0OPO S0A0S0J0 a
1670 8
Pawn hunt
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZrZ0ZkZ ZpZ0Zpop 0l0obm0Z Z0Z0o0Z0 nOPZPZ0Z Z0Z0ZPA0 0Z0L0ZPO Z0ZRJBMR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1675 8 7 6 5 4 3 2 1
1678
0Zks0arZ o0Z0ZpZp 0ZbZ0o0Z Z0o0oPZ0 0ZRmPZPZ ZPZ0ZBZP PZ0A0Z0Z Z0ZKZ0MR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1680
rZbs0ZkZ opo0Zpo0 0ZnZpl0o Z0Z0Z0Z0 0ZROPZ0Z O0Z0ZNZ0 0O0Z0OPO Z0ZQJBZR a
c
rZbZka0s opZnZpop 0ZqZ0Z0Z Z0o0Z0A0 QZBZ0Z0Z Z0o0ZNZ0 PO0Z0OPO S0Z0J0ZR a
1677 8
b
1679
rm0ZqZkZ oporZpap 0Z0Z0mpZ ZPZ0o0M0 0Z0ZPZ0Z AQO0ZNZ0 PZ0Z0OPO Z0Z0SRJ0 a
nm0lka0s Z0Z0opop 0ZpZ0Z0Z ZpZ0O0Z0 0ZpO0Z0M Z0MbZ0Z0 0O0ZBOPO Z0AQZRJ0 a
1676 8
Advantage in development
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0Zka0s o0Z0lpop 0ZpZ0m0Z ZpZ0o0A0 0ZBZPZ0Z ZQM0Z0Z0 POPZ0OPO S0Z0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1681 8 7 6 5 4 3 2 1
1684
rZ0lka0s opZ0Zpop 0ZpobZ0Z Z0m0Z0Z0 0ZPL0MnZ ZPZ0Z0O0 PA0ZPO0O S0Z0JBMR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1686
rZbZkZ0s opZqa0op 0ZnZ0o0Z ZNZpo0Z0 0Z0Z0A0Z Z0ZBZQZ0 POPZ0OPO Z0ZRS0J0 a
c
rlbZkZ0s ZpZnapZp pZ0Z0opZ Z0Z0Z0Z0 0OBM0O0Z O0M0O0Z0 0Z0Z0ZPO Z0SQZRJ0 a
1683 8
b
1685
0ZrZka0s opZqo0op 0Z0Z0obZ Z0APZ0Z0 0mNZ0ZPZ Z0Z0ZNZP POnZPOBZ S0ZQZRJ0 a
rmbZkZ0s opZ0Zpop 0Z0a0Z0Z l0ZpM0A0 0Z0Z0Z0Z Z0ZBZ0Z0 Po0Z0OPO ZRZQZRJ0 a
1682 8
Advantage in development
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZkZns ZplbZpap pZnZpZpZ Z0ZpO0A0 0Z0M0Z0L Z0ZBZNZ0 POPZ0OPO S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1687 8 7 6 5 4 3 2 1
1690
0Z0ska0s ZblnZpop pZ0Z0Z0Z Z0Z0o0O0 0oBZpO0Z Z0Z0A0ZQ POPZNZ0O Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1692
rZ0lka0s opZ0Zpop nZ0ZbZ0Z ZNZpM0Z0 0Z0O0A0Z Z0Z0Z0Z0 PZ0ZQOPO ZRS0Z0J0 a
c
rZbZka0s opZ0Zpop 0ZnmpZ0Z ZqZ0Z0M0 0Z0o0Z0Z ZBZQZNZ0 POPA0OPO S0Z0S0J0 a
1689 8
b
1691
0sbZ0a0s opM0jpop 0ZnZpm0Z Z0Z0M0Z0 0ZBZ0Z0Z Z0Z0A0Z0 PO0Z0OPO S0Z0J0ZR a
0Z0lkZ0s ZbZpapop pZnZ0Z0Z Z0OpO0M0 0ZpZ0A0Z Z0Z0Z0O0 Ps0Z0OBO S0ZQZRJ0 a
1688 8
Advantage in development
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rmblkZ0s Z0o0apZ0 0o0Z0Z0m oPZpO0op PZ0O0Z0Z Z0ZBZNZ0 0Z0MQOPO S0A0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1693 8 7 6 5 4 3 2 1
1696
rmbZ0Zks opZ0lpap 0Z0opZpZ ZNZ0Z0Z0 0ZBMPZ0Z Z0Z0O0Z0 POPZ0ZPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1698
rZbl0skZ opZ0o0ap 0Z0o0ZpZ Z0oPmPZn 0ZPZ0Z0Z Z0M0ZPZP PO0L0APZ S0Z0JBMR a
c
rZ0l0skZ opona0op 0ZnobZ0Z Z0Z0Z0Z0 0ZPZ0O0Z Z0Z0M0O0 PO0L0ZBO S0A0J0MR a
1695 8
b
1697
rZ0Zka0s o0l0opop 0ZnZ0m0Z ZpZ0Z0Z0 0ONZ0ZbZ O0Z0ONZ0 0A0Z0OPO S0ZQJBZR a
rm0s0ZkZ ZpZ0lpop 0Z0Z0ZbZ o0anZ0Z0 0Z0ZpZPO O0M0O0Z0 0OQM0OBZ S0A0J0ZR a
1694 8
Advantage in development
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lkZns ZpZ0Z0ap pZ0opZpZ Z0Z0m0Z0 0Z0ZPA0Z M0Z0ZNZ0 0ZPZ0OPO S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1699 8 7 6 5 4 3 2 1
1702
rZbl0skZ opopapop 0ZnZ0m0Z Z0Z0Z0A0 0ZBL0Z0Z Z0M0ZNZ0 POPZ0OPO Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1704
rZ0lka0s ZbZ0Zpop pZ0Zpm0Z ZpZ0Z0Z0 0m0O0Z0Z ZBM0ZNZ0 PO0ZQOPO S0ARZ0J0 a
c
rZbZkm0s opo0lpo0 0Z0o0Z0o Z0Z0Z0Z0 0ZPM0O0Z Z0O0O0O0 PZQZ0JPZ S0Z0ZBZR a
1701 8
b
1703
rZbZ0skZ o0Zplpop 0onZpm0Z Z0a0Z0Z0 0ZPZ0Z0Z Z0M0Z0O0 PONAPOBO S0ZQZRJ0 a
rZ0lkZ0s ZpobZpap pZnZ0ZpZ Z0A0Z0Z0 BZPZPo0Z Z0Z0ZNZ0 PO0Z0OPO S0ZQJ0ZR a
1700 8
Advantage in development
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Zkans opo0Zbop 0l0ZNo0Z Z0Z0m0Z0 0ZBZNAPZ Z0Z0Z0Z0 POPZQO0O Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1705 8 7 6 5 4 3 2 1
1708
rZbj0m0s opZnZqZp 0ZpZ0o0S Z0ZpZ0Z0 0Z0OpM0Z Z0MBZ0L0 POPZ0OPZ Z0J0S0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1710
rmbZ0Zns opo0Z0j0 0Z0Z0Z0o Z0ZBO0Z0 0a0O0Zpl Z0Z0ZpM0 POPZ0ZPZ S0AQZRJ0 a
c
rZbl0s0Z ZpZnjPo0 pZ0ZpZ0Z Z0OpO0ZQ 0Z0Z0Z0Z Z0M0Z0Z0 POPZ0OPZ Z0JRZ0ZR a
1707 8
b
1709
rm0ZkZ0s opZ0Zpop 0Zpaqm0Z Z0Z0Z0Z0 0Z0O0A0Z Z0MQZ0Z0 POPZNZPO Z0JRZ0ZR a
0ZkZ0a0s opZ0Zpo0 0ZnZ0l0o Z0ZQZ0Z0 0Z0Z0ZbZ Z0Z0O0Z0 PO0Z0OPO Z0JRZBMR a
1706 8
Advantage in development
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ska0s opZnZpop 0l0Z0Z0Z Z0Z0Z0Z0 0Z0MNZ0Z Z0Z0Z0Z0 PO0Z0OPO S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1711 8 7 6 5 4 3 2 1
1714
rZbZ0skZ o0l0apop 0o0Zpm0Z Z0Z0Z0A0 0Z0M0Z0Z Z0MRZ0Z0 POPZQOPO Z0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1716
rZ0l0skZ opZ0Zpop 0apM0m0Z Z0Z0m0Z0 0OPZPZbZ O0M0ZPO0 0Z0Z0ZBO S0AQJ0ZR a
c
rZbZkZ0s Zplnapo0 pZ0opZ0Z Z0Z0Z0On 0Z0MPZ0Z Z0MBZ0Z0 POPZ0Z0O S0AQZRZK a
1713 8
b
1715
rmbl0skZ Zpo0Zpop 0Z0Zpa0Z o0ZnZ0Z0 0ZNO0Z0Z O0ZBZNO0 0OPAQZ0O S0Z0J0ZR a
rZblka0s Z0Z0opop pZpZ0Z0Z Z0opO0Z0 0Z0Z0Z0Z Z0O0ZNZ0 POPZ0OPO S0AQS0J0 a
1712 8
Advantage in development
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZkZ0s opZ0Zpop 0Z0Zpa0Z Z0m0Z0Z0 0Z0SBZ0Z Z0Z0ANZ0 PlPZQOPO Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1717 8 7 6 5 4 3 2 1
1720
rm0Z0ZkZ ZplbZpap pZ0Spo0Z Z0Z0Z0ZB 0Z0ZPO0Z ZNM0Z0Z0 PZPL0ZPO Z0Z0Z0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1722
rm0Z0ZkZ opo0Z0Z0 0Z0o0ZpZ Z0ZPZ0Z0 0ZPZpsqZ Z0ZQZBZR PO0ZKOPZ Z0S0Z0Z0 a
c
rmblkZns ZpZ0Zpop pZ0o0Z0Z Z0oPZ0Z0 0Z0ZPL0Z Z0M0Z0Z0 POPZ0ZPO S0Z0JBMR a
1719 8
b
1721
0sbl0s0j opMnZpa0 0Z0Z0Zpo Z0Z0Z0Z0 0Z0M0Z0Z ZBZ0Z0Z0 PO0Z0ZPO Z0SQS0ZK a
rZbZ0skZ ZpZnZpo0 0l0ZpZ0o o0ZnZ0Z0 0O0Z0Z0A Z0OBONZ0 0Z0L0OPO Z0S0ZRJ0 a
1718 8
Advantage in development
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZkZ0a0s Zpobl0Zp pZ0Z0o0m Z0o0Z0o0 0ZNMPZ0Z Z0ZQZ0A0 POPZ0OPO Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1723 8 7 6 5 4 3 2 1
1726
0s0Zka0s Z0o0mbop 0o0Zqo0Z M0o0Z0Z0 PZPZ0O0Z ZNZ0AQZP 0O0Z0ZPZ S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1728
rZbs0Z0Z o0ZnjpZp 0Z0Zpo0Z ZpZ0Z0ZQ 0ZBONZ0Z l0Z0Z0Z0 0Z0Z0OPO Z0S0ZRJ0 a
c
rZ0Zkans Z0oqZpop bo0ZpZ0Z o0Z0O0Z0 0ZPZ0Z0Z ZNZBZ0Z0 PZ0ZQOPO S0A0ZRJ0 a
1725 8
b
1727
0Z0Zka0s ZbZrZpop pZ0ZpZ0m Z0Z0L0Z0 0oqZ0Z0Z Z0Z0Z0O0 PA0OPO0O SNZ0JBS0 a
rl0Zka0L Zbopmpo0 pZ0m0Z0Z Z0ZPM0o0 pZ0Z0Z0Z Z0M0Z0Z0 POPZ0OPO S0Z0S0J0 a
1724 8
Advantage in development
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rlbZkZns o0Z0ZpZp 0ZpZpZpZ ZNZpZ0Z0 0ZBZ0Z0Z Z0Z0ZQZ0 POPZ0OPO Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1729 8 7 6 5 4 3 2 1
1732
rZ0Z0skZ ZpZblpa0 pZ0o0Z0o Z0oPm0on PZ0ZPZPZ Z0M0APZ0 0O0LBZ0O ZRM0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1734
0s0ZkZ0s opZblpo0 0Z0ZpZnZ Z0ZpO0Z0 0ZpO0ZBZ O0O0Z0O0 0ZPL0ZPZ ZRA0ZRJ0 a
c
rZbl0skZ ZpZ0Zpap pZpo0mpZ Z0Z0m0Z0 0ZPZPZ0Z ZPM0APZ0 PZ0LNZPO Z0ZRJBZR a
1731 8
b
1733
rmbZnskZ Zpl0Zpap pZ0o0ZpZ Z0oPO0Z0 PZ0Z0O0Z Z0M0ZNZ0 0O0ZBZPO S0AQZRJ0 a
rZbl0skZ Z0ZnZpap pZ0o0ZpZ ZpZPo0Z0 0Z0ZPmPZ Z0M0APZ0 POBZNL0O S0Z0J0ZR a
1730 8
Positional pawn sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ apZ0Z0o0 pZ0Z0o0Z Z0Z0o0Z0 0OPoQO0Z O0Z0Z0Z0 0A0M0ZPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1735 8 7 6 5 4 3 2 1
1738
0s0a0s0j Z0Z0Zqop 0ZnobZ0Z o0ZNo0Z0 0ZBZ0Z0Z ZPOQS0Z0 RZ0Z0OPO Z0Z0ZNJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1740
0sqZ0skZ Z0m0a0op 0Z0opm0Z opZ0ZpZ0 0Z0O0Z0Z ZPZ0ONO0 PA0ZQOBO S0Z0ZRJ0 a
c
0ZkZrZ0s opZbZ0Z0 0Z0mpo0Z l0ZpZ0o0 PZpO0O0Z Z0O0ZBZP 0ZPL0ZPA S0Z0ZRJ0 a
1737 8
b
1739
0ZqZ0skZ ZrZ0Zpap po0obZpZ Z0m0o0Z0 0ZPZPO0Z Z0M0ABZP PO0L0ZPZ Z0ZRZRJ0 a
0Z0srakZ ZpZ0Zbop 0lpo0o0Z o0m0m0Z0 0ZPLPM0O APM0Z0O0 PZ0Z0OBZ Z0ZRS0J0 a
1736 8
Positional pawn sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ opo0Zpop 0ZnZ0Z0Z Z0ZnO0Z0 0a0o0M0Z Z0ZPZNZ0 POPZBJPO S0AQZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1741 8 7 6 5 4 3 2 1
1744
0s0ZrZkZ o0mbZpap 0Z0o0lpZ Z0oPZ0Z0 0Z0ZPO0Z O0MBM0Z0 0OqZ0ZPO ZRZ0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1746
0Z0ZrZkZ Zbl0s0ap po0opmpZ Z0Z0Z0Z0 Pm0ZPO0Z ZNM0A0S0 0OPZ0LBO Z0ZRZ0J0 a
c
rZ0m0skZ obZqa0Zn 0o0Z0o0o Z0o0oPZP 0ZPoNZPZ Z0ZPZNA0 PO0ZQZBZ S0Z0ZRJ0 a
1743 8
b
1745
rZ0ZrZ0Z ZpZbZpj0 pZ0o0mpZ Z0oPm0L0 PZ0lPZ0o Z0M0ZPZ0 NO0ZBZPO ZRZ0ZRZK a
rm0Zka0s Z0Z0Zpo0 pZ0o0l0o Z0oPZ0Z0 Po0ZPZbZ Z0Z0ZNZ0 0OQM0OPO S0Z0JBZR a
1742 8
Positional pawn sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lkZ0s obonZpop 0o0ZnZ0Z Z0OpO0Z0 0Z0O0Z0Z Z0Z0APZ0 PZ0MBZPO S0ZQJ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1747 8 7 6 5 4 3 2 1
1750
rs0mbZkZ Z0l0a0op pm0o0o0Z ZpZPoNOP 0Z0ZPZ0Z ZPO0ANZ0 0ZBZ0O0Z S0ZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1752
rZ0l0skZ o0Z0Zpop bono0m0Z Z0o0o0A0 0ZPOPZ0Z O0OBZPZ0 0Z0ZNZPO S0ZQZRJ0 a
c
rZbl0skZ ZpZ0ZrZ0 pZ0o0mnZ Z0ZPo0o0 PZ0ZPoPZ ZQM0ZPZ0 0ORABM0Z Z0Z0ZRJ0 a
1749 8
b
1751
qZ0s0ZkZ obs0apop 0onopm0Z Z0o0Z0Z0 0ZPO0Z0Z ZPZ0ONZ0 PA0MQOPO ZBSRZ0J0 a
rZ0l0ZkZ opM0Zrap 0Z0o0mnZ Z0ZPo0Z0 0Z0ZPo0Z Z0ZNZPZb POQABZ0O Z0S0ZRJ0 a
1748 8
Positional pawn sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZqZ0skZ ZpZ0m0a0 rZ0o0m0o ZRoPo0o0 0ZPZPo0Z ZQM0ZNO0 PZ0Z0OKO Z0A0ZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1753 8 7 6 5 4 3 2 1
1756
rZbZnskZ opo0l0Z0 0Z0o0ZpZ Z0OPopZ0 0ONZ0Z0Z Z0M0Z0Z0 PZ0Z0OPO Z0SQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1758
rZ0l0skZ ZpobmpZp 0Z0o0mpa o0ZPo0Z0 0ZPZPZ0Z ZPM0Z0Z0 PZ0MBOPO ZRAQZRJ0 a
c
rZbZqskZ o0onZpap 0o0ZnZpZ Z0Z0o0Z0 0OPZPZ0Z Z0M0ANZP PZ0ZBOPZ SQZRZ0J0 a
1755 8
b
1757
rZbZ0skZ opZnmpap 0l0o0ZpZ ZNZPo0Z0 0ZPZPZ0Z o0Z0Z0Z0 0Z0MBOPO ZRAQZRJ0 a
rZ0l0skZ Z0obZpa0 0o0o0Zpo o0mPo0Zn 0ZPZPZ0Z ZPM0APZ0 PZQMBZPO S0Z0S0J0 a
1754 8
Positional pawn sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblrZkZ opm0Zpap 0ZpZ0ZpZ Z0Z0o0Z0 0ZPZPZ0Z Z0M0APZP PO0Z0LPZ S0Z0SBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1759 8 7 6 5 4 3 2 1
1762
rZblrZkZ opZ0Zpap 0ZnZ0mpZ Z0ZpZ0Z0 0ZPM0Z0Z Z0M0APZ0 PO0LBZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1764
rZ0l0skZ opo0Znap 0Z0o0Z0Z Z0OPobo0 POBZNm0Z Z0M0Z0Z0 0Z0Z0OPO S0AQZRJ0 a
c
0s0l0skZ Z0Zbopap 0Zno0ZpZ Z0ZNZ0Z0 0oRZ0Z0Z ZPZ0ZNO0 PZ0LPOBO Z0ZRZ0J0 a
1761 8
b
1763
rZ0ZrZkZ l0Zna0Z0 0Z0o0ZpZ oPoPo0op PZ0ZPZ0Z ZNL0ZPZ0 0Z0ZBZPO Z0ZRZRZK a
rmbZ0skZ opZ0l0Zp 0Z0o0Z0Z Z0oPZ0o0 0ZPZPo0Z Z0M0Z0Z0 PO0LBSPO S0Z0Z0J0 a
1760 8
Positional pawn sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZrZkZ Zbl0Zpap 0Z0Z0ZpZ opZpM0ZP 0ZnO0Z0Z O0Z0ZPZ0 BO0ZRAPZ Z0ZQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1765 8 7 6 5 4 3 2 1
1768
rZ0Z0ZkZ ZpZqZpop 0ZbZnZ0Z o0ZpA0Z0 Pa0Z0Z0Z ZNMQZPO0 0OPZRZ0O Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1770
rZbZ0skZ opo0Zpap 0Z0Z0mpZ Z0Z0l0Z0 0Z0MpA0Z O0Z0Z0O0 0OPZPOBO ZRZQZRJ0 a
c
rZ0lrZkZ Zpm0Z0ap pZ0o0mpZ Z0oPZ0Z0 PZ0Z0Z0Z Z0MQZ0A0 0O0ZBOPO ZRZ0ZRJ0 a
1767 8
b
1769
rZbZ0skZ o0Z0a0op qZpZpo0Z Z0OpZ0Z0 0Z0O0A0Z O0ONZ0O0 0Z0Z0O0O S0ZQZRJ0 a
rZbl0skZ opo0Z0ap 0Zno0m0Z Z0Z0opo0 0ZPZ0Z0Z ZPMPO0O0 PA0ZNOBO S0ZQZRJ0 a
1766 8
Positional pawn sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lrZkZ ZpZnZpob pZ0o0a0o O0ZPZ0Z0 0OPZpZ0Z S0Z0ZPZP 0Z0M0ZPZ Z0AQSBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1771 8 7 6 5 4 3 2 1
1774
rZbl0skZ opZ0m0a0 0Z0Z0Z0o Z0Z0opo0 0ZPZpZ0Z ZBO0ZPZ0 PO0ZQZPO S0A0MRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1776
rZbZkZns ZpZ0Z0o0 pZ0opa0Z Z0Z0Z0Zp 0ZqMPZ0Z Z0M0AQZ0 POPZ0ZPO S0Z0ZRJ0 a
c
0Z0srZkZ o0Z0Zpo0 bZpZ0ZqZ Z0Zpa0Zp 0Z0Z0Z0O ZPZ0OBO0 PZ0LNO0Z Z0S0S0J0 a
1773 8
b
1775
rZrZ0ZkZ ZpZ0oblp 0Z0opapZ ZPZ0Z0Z0 0ZPZPO0Z Z0Z0A0Z0 0Z0LBZPO ZRZRZ0J0 a
rZ0ZkZ0s Z0ZbZpa0 qZpZpZpZ m0ZpO0A0 poPO0ZPO Z0ZQZ0Z0 PO0MNZ0Z ZKZRZ0ZR a
1772 8
Positional pawn sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZbZrskZ opl0Z0Zp 0ZpZ0ZpZ Z0Z0ZpZn 0ZPSpZnZ ZPM0Z0O0 PZNZPOBO Z0L0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1777 8 7 6 5 4 3 2 1
1780
rmblka0s o0ZpZpZp 0o0Z0mpZ Z0oPZ0Z0 0Z0Z0Z0Z O0Z0ZNZ0 0O0ZPOPO SNAQJBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1782
0Z0Z0Z0s obonjpZ0 0o0ops0Z Z0Z0Z0lp 0ZPOPSpM Z0OBZ0O0 PZ0Z0LPO Z0Z0ZRJ0 a
c
0s0ZkZ0s Z0lnapo0 pZbZpZ0Z Z0ZpO0Zp 0o0A0ZPO ZPZ0LPZ0 PMPZ0Z0Z ZKZRZBZR a
1779 8
b
1781
rZbl0s0j ZpZpZ0ap 0ZpZ0ZnZ o0Z0ZpoQ 0ZPO0Z0Z O0M0O0O0 0O0Z0ZBO ZRA0ZRJ0 a
rm0Z0skZ o0Zqopap 0o0Z0ZpZ Z0O0Z0Z0 0Z0Z0Z0A ZQO0ONZ0 PZ0ZKOPO S0Z0Z0ZR a
1778 8
Positional pawn sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ o0Znl0op 0o0ZpZ0Z Z0onZpO0 0Z0O0Z0Z O0ZQONZ0 0O0A0O0O ZKZRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1783 8 7 6 5 4 3 2 1
1786
rZ0Z0skZ ZpZbapop pZ0o0m0Z l0Z0o0Z0 0Z0SPOPZ ZBM0AQZ0 POPZ0Z0O Z0J0Z0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1788
0Z0s0s0j Z0l0Zpop po0o0anZ Z0ZBZ0Z0 PZ0MPZ0Z Z0O0Z0L0 0O0Z0ZPO Z0ZRZRZK a
c
0Z0ZkZ0s Z0lnapop pZbopZ0Z O0o0Z0O0 Ns0ZPO0Z ZPZ0ABZ0 0ZPL0Z0O S0Z0ZRJ0 a
1785 8
b
1787
kZ0Z0s0s apZ0Z0o0 0Z0ZQZnZ Z0Z0Z0O0 PZ0o0O0Z l0Z0ZNJP 0Z0A0Z0Z Z0S0S0Z0 a
0Z0ZrskZ opZ0Z0op 0abZ0Z0Z Z0ZpZ0Z0 0Z0Z0ZnZ Z0ZBZNZ0 PO0Z0OPO S0A0ZRJ0 a
1784 8
Positional exchange sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0ZkZ ZqZ0Zpa0 0ZbopZpo opZ0Z0Z0 0ZrZPO0Z O0O0M0O0 0O0SQZBO Z0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1789 8 7 6 5 4 3 2 1
1792
rZ0lrZkZ o0Z0Zpap bo0o0Z0Z Z0oPm0Zp PZ0ZPZ0Z S0Z0Z0Z0 0OQM0OPO Z0ANZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1794
0s0s0ZkZ ZbZ0Zpop pZ0Zpm0Z Zpa0A0Z0 0Z0Z0Z0Z ZPZ0M0O0 PZPZ0OBO Z0S0S0J0 a
c
rZ0Z0skZ Z0lnapon pZ0MpZ0o ZpZbO0Z0 0Z0Z0Z0O ZNZ0Z0A0 POPZQZPZ ZKZRZBZR a
1791 8
b
1793
0Zks0Zns o0oqZ0op 0o0ZpZ0Z m0ZpOpZ0 0Z0O0M0Z Z0O0Z0L0 0ZPZ0OPO S0A0J0ZR a
rZ0Zra0Z obZ0ZpZk 0ZRZnlpo Z0O0o0Z0 0ZBZPm0Z O0M0ANZP 0ZQZ0OPJ Z0ZRZ0Z0 a
1790 8
Positional exchange sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ opo0l0ap 0Z0o0ZpZ Z0ZPo0Z0 0mPZPZ0O ZQMnZBO0 PO0AKZ0M S0Z0Z0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1795 8 7 6 5 4 3 2 1
1798
0ZbZrakZ o0Z0Z0Zp rlpZpZpZ ZnSpMpZ0 0O0O0A0Z O0Z0LBO0 0Z0ZPO0O S0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1800
rZ0ZkZ0s Zbl0Zpop pZpapm0Z Z0Z0S0Z0 0Z0Z0A0Z Z0M0Z0O0 POPZ0OBO S0ZQZ0J0 a
c
rZ0Z0Zkm oqZ0Z0Zp 0orApZpO Z0ZpOpZ0 PZ0Z0M0Z Z0ZPL0Z0 RZnZ0OPZ Z0Z0ZRJ0 a
1797 8
b
1799
0s0s0ZkZ Z0a0lpZp bZpZ0ZpZ o0o0o0Z0 0ZPZPZ0Z ZPM0APZ0 PZQZ0ZPO S0ZRZ0J0 a
0s0Z0skZ Z0lnopa0 bZ0o0Zpo o0oPZ0Z0 PZPZ0Z0Z Z0ZBZNO0 0ZQAPO0O ZRZ0ZRJ0 a
1796 8
Positional exchange sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0Z0s Z0Z0apjp pZ0o0ZpZ lpZ0o0On 0Z0ZQZ0S Z0ZBAPZ0 POPZ0Z0O ZKZRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1801 8 7 6 5 4 3 2 1
1804
rZbZ0skZ Z0Z0Zpop pZ0ZpZ0Z Z0o0l0Zn RZ0ZPZ0Z Z0MBZ0ZP 0OPZ0OPZ Z0Z0LRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1806
rZ0lka0s opZ0opZ0 0mpZ0Zpm Z0Z0Z0M0 0Z0O0ZbZ Z0Z0ZNZ0 POPZ0OPZ S0AQJBZR a
c
rZ0Z0ZkZ Z0mnZro0 qZ0ZpZbo ZpapO0Z0 pZ0M0ZPZ O0OPZNZ0 0Z0ZQOBZ ZRA0ZRJ0 a
1803 8
b
1805
0sblrZkZ Z0m0apZp ponZ0ZpZ Z0opS0O0 PZ0Z0O0L Z0MPZ0M0 0OPA0ZBO Z0Z0ZRJ0 a
0ZrZrakZ Z0lnZpop po0ZpZ0Z Z0Z0O0Z0 0ZPZ0ZnZ ZPM0ZRZ0 PA0ZQZPO ZBZRZ0ZK a
1802 8
Positional exchange sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ opo0oqa0 0Z0o0Z0o Z0Z0Z0Z0 0ZPm0OpM APL0Z0O0 PZ0Z0OBO Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1807 8 7 6 5 4 3 2 1
1810
rZ0l0skZ Z0Z0Z0Zp pZ0o0Z0Z mpoPm0Z0 0ZPZ0O0Z ZPZ0Z0Zb PL0MBZ0O S0ZNZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1812
0Z0ZrZ0Z Z0Z0Zpjp rm0o0mpl ZNoPZ0M0 0Z0ZPO0Z Z0Z0Z0Z0 PO0L0Z0O ZKZ0ZRZR a
c
0Z0lrakZ ZpZ0Zpo0 pZro0Z0Z Z0ZNo0Zp 0Z0ZPZbO ZPM0O0Z0 PO0L0Z0Z ZKZ0Z0SR a
1809 8
b
1811
rm0Z0skZ opZ0Zpop 0lpZ0m0Z Z0a0Z0Z0 0Z0M0ZbL Z0Z0A0M0 POPZ0OPO Z0JRZBZR a
rZ0Z0ZkZ Z0ZqmrZp pZ0a0o0Z ZpopZ0Z0 0Z0M0Z0Z ZBOQZ0Z0 PO0Z0OPO Z0Z0SRJ0 a
1808 8
Positional exchange sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0ZkZ o0l0Zpa0 0ZpMbZ0o o0OrZ0o0 0O0Z0o0Z O0Z0ZNZP 0ZQZROPZ Z0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1813 8 7 6 5 4 3 2 1
1816
rZ0Z0skZ ZblnapZp po0opmpA Z0Z0Z0Z0 0ZPZPZPZ Z0M0ZPZ0 PONZBL0O S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1818
0Zbl0skZ s0Z0Z0Zp 0Zpapm0Z o0ZpZ0o0 NZPO0o0Z ZPZPZ0O0 0A0Z0OBO S0ZQS0J0 a
c
0Zra0snj Z0ZbZ0Zn pZPo0ZqZ Z0Z0o0Z0 NA0ZPZ0Z Z0ZNZBo0 PZ0Z0ZKZ Z0AQZ0ZR a
1815 8
b
1817
0s0l0skZ o0onZ0o0 0ZnZpo0o Z0OpO0a0 NZ0Z0Z0Z OPL0ZBZP 0Z0Z0OPA S0Z0ZRJ0 a
0ZrZ0s0j o0Zbm0ap 0l0o0mpZ ZPZPopO0 0Z0Z0Z0Z ZQMNZPZP PO0ABZKZ S0Z0ZRZ0 a
1814 8
Positional exchange sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZnZrs0j opo0Zqa0 0ZnZbZ0o ZNZ0o0o0 0Z0ZPZ0Z ZPZ0LNAP PZ0ZBOPZ Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1819 8 7 6 5 4 3 2 1
1822
rZbZrZkZ Zpo0Zpa0 pZ0o0lnZ Z0OPZNop PORZPo0Z Z0Z0ZNZP 0ZQZBOPZ Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1824
rZ0lrZ0Z opZ0Zpak 0Z0ZnZpZ Z0APono0 0ZPZ0ZBZ Z0M0Z0O0 PO0L0Z0O S0Z0ZRJ0 a
c
rZbZ0s0j ZpZ0Z0Zp 0Z0o0Z0Z Z0ZBa0Aq 0OPZ0o0Z Z0Z0Z0Z0 0ZQZ0ZPO Z0Z0SRJ0 a
1821 8
b
1823
rZbl0skZ opo0m0Zp 0Z0o0mpZ Z0OPo0Z0 0ONaPo0Z A0M0ZPZ0 PZ0ZBZPO S0ZQZRZK a
rZ0ZrZ0j Z0oqZ0Zp 0o0oNZbA Z0ZPa0Z0 0OPZpZ0Z Z0ZnZ0S0 0Z0LBZPO Z0Z0ZRJ0 a
1820 8
Positional exchange sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrl0skZ obZ0mpap 0Z0o0mpZ ZPZPo0Z0 0Z0Z0Z0Z ZNM0ZBZ0 PO0Z0OPO ZRAQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1825 8 7 6 5 4 3 2 1
1828
0Z0s0ZkZ opl0ZpZp 0ZpZbZpa Z0Z0Z0Z0 0O0ZPO0Z Z0ZrA0Z0 PZ0Z0MPO ZRL0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1830
rZ0Zqs0Z o0ZnZ0jp bo0Z0Z0Z Z0oPo0Z0 0ZPZ0o0Z ZPMNmRZ0 PZ0L0ZPO Z0ZBS0J0 a
c
rZbZrZkZ opZ0ZpZp 0Zpo0ZpZ Z0m0a0O0 0ZPZPA0Z Z0M0Z0O0 PO0Z0O0Z Z0ZRSBJ0 a
1827 8
b
1829
rZbZ0skZ opZ0Z0ap 0Zpo0ZpZ Z0Z0l0A0 0ZPZPZpZ Z0M0Z0Z0 PO0L0OPO S0Z0ZRJ0 a
rZ0Zns0j o0Z0Zqap 0o0o0mbZ Z0ZPo0S0 0Z0Z0Z0Z ZQM0A0Z0 PO0MBO0O Z0Z0Z0SK a
1826 8
Positional exchange sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ opo0Z0a0 0Z0o0Z0o Z0mPobZ0 0ZPZ0ZpO Z0M0Z0O0 PO0MBZPZ S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1831 8 7 6 5 4 3 2 1
1834
rZ0lkZ0s ZbZ0Zpop pZ0o0a0Z Z0mNo0Z0 0S0ZPZ0Z Z0O0Z0Z0 0ONZ0OPO Z0ZQJBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1836
rZ0lrZkZ Z0Z0apop bZ0o0Z0Z o0oPOPO0 0onZ0Z0O Z0Z0Z0M0 PO0ZNZBZ Z0SQZRJ0 a
c
rZbZqskZ opo0Zpap 0Z0Z0ZpZ Z0ZNZ0A0 0Z0ZPZnZ Z0Z0ZQOP POPZ0ZBZ S0Z0J0ZR a
1833 8
b
1835
0Z0j0Zqs Zps0apZ0 0mnZpZpo obZpO0Z0 0Z0O0MQO O0Z0ZNZ0 BO0A0OPZ S0S0Z0J0 a
0s0Z0Z0j Z0ZQm0l0 0Z0o0Z0Z Z0Z0a0op 0Z0ZPo0Z Z0Z0ZPZP 0Z0SBAPZ Z0Z0Z0J0 a
1832 8
Positional exchange sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0arZ ZbZpZpZ0 0oqZpZ0Z Z0Z0O0Zp pZPZ0ZpO O0LRZ0A0 0O0Z0OPZ Z0ZRM0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1837 8 7 6 5 4 3 2 1
1840
0sbZrZkZ Z0lnZpap ponopZpZ Z0Z0Z0O0 PZ0MPO0Z Z0M0Z0ZQ 0OPZ0ZBO Z0ZRZRAK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1842
rZ0ZkZ0s ZbZqapop 0Z0o0Z0Z o0Z0oPO0 0o0ZnZ0Z Z0ZPANZQ PO0Z0Z0O J0MRZRZ0 a
c
0s0s0mkZ ZpZ0lnZp 0MpZbopa Z0O0o0Z0 0OBZPZ0Z ZQM0A0Z0 0Z0Z0OPO ZRZ0ZRJ0 a
1839 8
b
1841
0ZrlrZkZ opZbZpo0 0ZnZ0m0o Z0Z0Z0ZN 0Z0o0Z0Z O0O0Z0S0 BZ0Z0OPO S0AQZ0J0 a
rZ0ZrZkZ ZblnZpap po0opmpZ Z0Z0Z0Z0 0ZPMPO0Z ZPM0A0OP PZ0L0ZBZ Z0S0ZRJ0 a
1838 8
Positional piece sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZkZ Z0s0lpap bo0Z0ZpZ Z0mpZ0Z0 0O0MnZ0Z Z0Z0ZNOB 0ZRZPO0O AQZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1843 8 7 6 5 4 3 2 1
1846
0m0s0ZkZ ZbZpZ0op pZrZpo0Z Zpl0Z0Z0 0Z0SPZ0Z O0M0Z0ZQ 0OPZBOPO Z0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1848
0Zbl0skZ Z0o0apop 0onZpm0Z Z0OpZ0Z0 QO0O0A0Z Z0M0O0Z0 0Z0Z0OPO Z0Z0JBMR a
c
rZbZ0skZ Z0lpapZp pZnZpo0Z ZpZ0m0Z0 0Z0ZPZ0Z ZNM0A0Z0 POPLBZPO Z0ZRZRJ0 a
1845 8
b
1847
rZ0l0skZ obZ0ZpZp 0o0ZpZpZ Z0Z0ZnaN 0ZPO0Z0Z O0ZQZ0Z0 0ABZ0OPO S0Z0S0J0 a
0sbl0skZ ZpZ0Zpap pZ0o0ZpZ Z0oPm0Zn PZ0ZPZPZ M0M0Z0ZP 0O0Z0OBZ S0AQZRJ0 a
1844 8
Positional piece sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lrakZ Z0Z0Z0Zn 0m0Z0Zpo Z0ZpOpZ0 bopO0O0Z Z0Z0Z0MB 0O0ZNAPO SQZ0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1849 8 7 6 5 4 3 2 1
1852
0Z0ZrskZ Z0ZbZ0ap 0l0o0ZpZ Z0oPm0Zn 0Z0ZBO0Z M0M0Z0OP 0O0AQZ0J S0Z0ZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1854
0s0s0ZkZ o0Z0lpap 0obMpZpZ m0o0ZPO0 PZ0ZBZ0Z Z0OPZ0L0 0O0Z0ZNO Z0Z0SRJ0 a
c
rZbl0ZkZ opZnZ0op 0Z0Z0Z0Z Z0o0O0Z0 0ZPoPZ0Z O0M0Z0Z0 0O0LBZPO Z0Z0ZRJ0 a
1851 8
b
1853
0Z0s0Z0Z Z0s0a0j0 0o0Z0ZpZ oBlPopZ0 PZ0ZPZ0M Z0Z0O0O0 0Z0ZQOKZ ZRZ0Z0Z0 a
rZ0l0skZ opo0apop 0Z0o0Z0Z Z0Z0Z0m0 0mPO0ObZ ZNZBZ0Z0 PO0L0ZPO SNZ0J0ZR a
1850 8
Positional piece sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0Z0Z Z0o0Zrjp pZnobopZ ZqoNZ0Z0 0Z0ZPZ0Z ONL0S0ZP 0OPZ0OPZ Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1855 8 7 6 5 4 3 2 1
1858
rZnZ0Z0j Z0o0Z0lp pZpZ0m0Z Z0OpZpZ0 PZBZ0Z0Z ZPM0Z0ZP 0Z0ZQO0Z Z0Z0SKZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1860
rmbs0ZkZ opo0opap 0l0Z0ZpZ Z0Z0O0Z0 0ZBZNZnZ Z0Z0ZNZ0 PO0A0OPO Z0SQJ0ZR a
c
rm0lrakZ Zbo0Zpop pZ0Z0m0Z ZpZ0o0A0 0Z0ZPZ0Z ZBO0ZNZP PO0M0OPZ S0ZQS0J0 a
1857 8
b
1859
rZ0ZrZkZ oplnapop 0ZpZ0m0Z Z0Z0ZNZ0 0ZPZ0Z0Z Z0A0ONZ0 POQZ0ZPO Z0JRZ0ZR a
rZblkZ0s o0Z0opap 0ZnZ0ZpZ ZpZ0Z0Z0 0ZBO0Z0A Z0Z0ONZ0 PZ0Z0OPO S0ZQJ0ZR a
1856 8
Positional piece sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0sblrZkZ o0ZnZpZn 0Z0a0ZpZ ZpZ0Z0O0 0ZpOPZ0Z Z0M0ZPZ0 POQA0ZPZ ZKZRZBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1861 8 7 6 5 4 3 2 1
1864
0ZbsrZkZ opZ0apop 0l0ZpZnZ Z0Z0M0ZQ 0Z0ZBZ0Z ZPZ0Z0Z0 PAPZ0OPO S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1866
0Zrl0ZkZ obs0apop 0o0ZpZ0Z m0Z0M0Z0 0Z0OnZ0Z O0M0A0ZP BORZQOPZ Z0S0Z0J0 a
c
rZ0lrakZ ZbZnZpZ0 po0opmpo Z0Z0Z0M0 PZ0O0Z0Z Z0O0Z0ZQ 0OBM0OPO S0A0S0J0 a
1863 8
b
1865
rZ0lnZkZ Z0Zbapo0 0o0ZpZ0o Z0opO0M0 0Z0m0A0O Z0ZPM0O0 0OPZ0OBZ Z0ZQS0J0 a
rZ0Zka0s opZ0mpop 0Z0Z0m0Z Z0oPZqM0 0Z0ZpZ0Z ZPM0O0O0 PA0O0O0O S0ZQZRJ0 a
1862 8
Positional piece sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rs0Z0ZkZ Z0l0apZ0 0Z0o0ZpZ mboPo0Zp 0Z0ZPmNZ Z0O0ZNZP 0ZBZ0OPZ S0AQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1867 8 7 6 5 4 3 2 1
1870
rZ0l0skZ opZnapop 0ZpZpZ0Z O0Z0M0Z0 0mBO0Z0Z ZQZ0O0Z0 0O0Z0OPO S0A0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1872
rZbZkZ0s opZnZpo0 0Zpl0m0o Z0Z0o0M0 0Z0O0Z0Z Z0ZBZ0Z0 POPLNOPO Z0JRZ0ZR a
c
rZ0ZkZ0s opZnapo0 0lpZpm0o Z0Z0Z0ZP 0Z0O0ZRZ Z0ZQZNM0 POPA0OPZ Z0JRZ0Z0 a
1869 8
b
1871
rZ0Zrj0Z Z0Z0opa0 0Z0o0mpo o0oPZ0M0 0lPZ0A0Z Z0Z0S0ZP PO0ZQOPZ Z0Z0S0J0 a
rZ0lrakZ Zbo0Zpop pZnZ0m0Z ZpZ0M0Z0 0O0OpZ0Z Z0O0Z0Z0 PZBM0OPO S0AQS0J0 a
1868 8
Positional piece sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0Zks opZqmpop 0apM0Z0Z Z0ZpOnZ0 PZ0O0Z0Z A0Z0ZNZ0 0Z0Z0OPO ZRZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1873 8 7 6 5 4 3 2 1
1876
rZba0skZ o0ZnZpop qZpZ0m0Z ZpZ0ZNZ0 0ZBL0Z0Z Z0Z0ZNZ0 POPA0OPO Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1878
rZ0s0ZkZ ZbZnZpap pl0opZpZ ZpZ0Z0O0 0Z0MPZ0Z ZPZ0Z0L0 PAPS0OBO Z0ZRZ0J0 a
c
0Z0lkZ0s o0ZbZ0op 0ZpZ0o0Z Z0S0o0Z0 QZ0o0Z0Z Z0ZPZNO0 Ps0ZPO0O S0Z0Z0J0 a
1875 8
b
1877
0ZrZrakZ Z0ZnZpZ0 pZ0oqmpZ ZpZ0o0Ap 0O0ZPZ0M ZPORZQMP 0Z0Z0OPZ Z0ZRZ0J0 a
0ZbZkZ0s o0ZqZ0op 0ZpZ0o0Z Z0S0o0Z0 QZ0m0Z0Z Z0ZPANO0 Ps0ZPO0O Z0Z0J0ZR a
1874 8
Positional piece sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrZkZ Zpl0Zpap 0Zpo0mpZ o0m0Z0Z0 0ZPMPO0Z OPM0Z0OP 0ZQZ0ABZ Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1879 8 7 6 5 4 3 2 1
1882
rZbZrZkZ ZpZnapZp 0l0o0ZpA o0Z0Z0Z0 Pm0MPZPZ Z0M0ZBZ0 0OPZ0Z0O S0ZQZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1884
0ZrZ0ZkZ opZ0Z0ap 0Z0o0ZpZ Z0ZPobZn 0lrZ0Z0Z Z0M0A0OP PO0ZQOBJ S0S0Z0Z0 a
c
rZbl0s0j Z0o0Z0a0 0o0Z0Z0Z Z0ZPZno0 0OPZNZPZ Z0Z0Z0Z0 0ZQZ0Z0O ZRA0ZRZK a
1881 8
b
1883
0sbZ0ZkZ s0Z0Z0mp pZ0l0opL Z0oPo0Z0 0ZBZPZ0M Z0Z0Z0S0 0Z0Z0OPO Z0S0Z0J0 a
rZ0l0s0j Zpo0Z0ap 0Z0o0ZpZ Z0OPo0Zn 0ONZPZbZ Z0M0A0O0 0ZQZ0Z0O ZRZ0S0J0 a
1880 8
Positional piece sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ opZ0l0ap 0Zpo0ZpZ Z0m0ZpZn 0OPMPZ0Z Z0M0ZPZ0 PZQZ0ZPO ZRARZBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1885 8 7 6 5 4 3 2 1
1888
rmrZ0ZkZ opZ0lna0 0Z0o0o0Z Z0oPo0o0 0ZPZPZ0A Z0M0Z0ZP PO0Z0O0Z S0ZQJNZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1890
rZ0l0ZkZ ZbZnZpop pZ0o0a0Z ZpZ0ZNZ0 0Z0ArZ0Z ZBZ0Z0ZP PO0Z0OPZ Z0SQS0J0 a
c
rZbZ0s0j Z0Z0lpZp pZ0opa0L Z0Z0mPZ0 0o0MPZ0Z Z0M0Z0Z0 POPZ0Z0O Z0JRZBS0 a
1887 8
b
1889
0sbl0ZkZ opZ0Z0Z0 nZ0s0m0o Z0oNZpo0 PZPa0Z0Z Z0Z0ZBZN 0O0ZQZPO S0A0ZRZK a
rZbZ0s0j opl0Z0m0 0ZpZna0Z Z0O0o0op 0OBZPo0Z O0M0ZNZP 0AQZ0OPZ Z0ZRS0J0 a
1886 8
Positional piece sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZkZrZ0s opZbZpa0 0ZpZ0Z0Z Z0OPZqZp 0Z0ZpOpZ Z0M0A0O0 PO0Z0Z0O Z0SQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1891 8 7 6 5 4 3 2 1
1894
rmbl0skZ opZ0Zpo0 0Z0Zpa0o Z0O0Z0Z0 0ZPo0Z0Z Z0M0ONZ0 POQZ0OPO Z0JRZBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1896
rZbl0skZ ZpZ0Zpap pZ0Z0ZpZ ZBZNZ0On PL0Z0O0O Z0Z0Z0Z0 0OPZ0Z0Z Z0JRZ0MR a
c
0Z0Zrs0j Z0oqm0ap 0oNo0Z0Z ZPZbZpo0 0Z0M0Z0Z ZQZ0ORO0 0A0Z0ZBO S0Z0Z0J0 a
1893 8
b
1895
0ZrZrZkZ ZbZ0Zpa0 po0o0Zpo Z0l0Z0Z0 PZ0SPZnZ ZNM0Z0O0 0OPZ0OBO Z0ZRZQJ0 a
rZ0l0Z0Z ZpZ0apj0 pZbo0m0Z O0A0oPZr 0m0ZPZpZ ZNM0Z0Z0 0OPS0ZBO S0ZQZ0J0 a
1892 8
Positional queen sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZkZ Z0Z0spZp 0opZ0ZpZ o0ZpZnl0 0Z0O0ZPZ ZPZ0OPZ0 PZ0Z0LNO Z0Z0SRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1897 8 7 6 5 4 3 2 1
1900
0Z0ZrZ0Z ZpZ0s0ak 0ZpZ0Zpo ZnO0ZqZn pO0Z0O0Z O0ZRA0Z0 0Z0LNSBO Z0Z0Z0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1902
0ZrZ0skZ o0ZnZpop 0lRZpZ0Z Z0Z0M0Z0 0o0ZPZ0Z Z0ZBZ0Z0 PO0ZQaPO Z0ZRZKZ0 a
c
rZ0l0skZ obZ0ZpZ0 0o0Z0apZ Z0ZpZ0Z0 0m0O0Z0Z Z0MBZNZ0 POQZ0O0Z ZKZRZ0ZR a
1899 8
b
1901
rZ0l0skZ Z0o0Zpop pZno0m0Z ZpZNZ0A0 0Z0aPZbZ ZBZ0ZNZ0 PO0Z0OPO S0ZQZRJ0 a
0s0lkZns Z0Z0opap 0Z0Z0ZpZ opo0m0Z0 0Z0Z0AbZ Z0MPZNO0 POPZ0ZBO S0ZQZRJ0 a
1898 8
Positional queen sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ opo0Zpop 0ZnZbZ0Z Z0ZnZ0Z0 0Z0Z0Z0a Z0M0AQZ0 POPZ0OPO Z0JRZBMR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1903 8 7 6 5 4 3 2 1
1906
rZ0Z0skZ o0Z0Zpap bopo0mpZ l0Z0m0Z0 0Z0MPO0A ZBM0Z0Z0 POPZQZPO Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1908
rZ0Z0ZkZ ZbZ0Zpop 0Z0orZ0Z Z0o0Z0ZQ pZPZ0Z0Z ZPZRA0Z0 PZqS0OPO Z0Z0Z0J0 a
c
0Z0s0mkZ obZrZpo0 0Z0Z0Z0Z Z0oNS0Op 0ZPZ0Z0O O0ZpSqZ0 BZ0L0Z0J Z0Z0Z0Z0 a
1905 8
b
1907
rZbs0mkZ opl0apop 0Z0Z0m0Z Z0ZpZ0Z0 0Z0Z0Z0A ZNM0O0Z0 POQZBOPO Z0ZRZRJ0 a
rZ0Z0ZkZ opZba0op 0l0ZpZ0Z Z0ZrZ0Z0 0Z0oRA0Z OQZ0Z0O0 0OPZ0O0O Z0Z0SNJ0 a
1904 8
Positional queen sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZrZkZ ZbZ0Zpop pZ0l0Z0Z ZpZPZ0Z0 0Z0ZnZ0Z Z0Z0ZPZ0 POQSBAPO Z0ZRZ0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1909 8 7 6 5 4 3 2 1
1912
rZblkZ0s opo0Zpm0 0Z0o0m0Z Z0aNo0A0 0Z0ZPZ0Z Z0ZPZ0Z0 POPZ0OBO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1914
0Zks0Z0s opZnapop 0lpZpZbZ Z0ZnZ0Z0 PZBO0Z0M Z0L0O0O0 NO0Z0O0O S0A0ZRJ0 a
c
0ZrZkZ0s Z0onZpo0 0o0Z0m0o o0Z0OPZ0 0Z0ZqZ0A O0O0Z0Z0 0ZQZNZPO S0Z0ZRJ0 a
1911 8
b
1913
qZ0Z0ZkZ Z0Z0s0ap 0o0O0opZ o0MbZ0Z0 PZpZ0Z0O Z0Z0ZQZ0 0O0A0OPZ Z0ZRZ0J0 a
rZqs0ZkZ opo0Zpap 0ZnZbZpZ ZBOPo0Z0 0Z0Z0Z0Z Z0Z0ANZP PO0Z0OPZ S0ZQZRJ0 a
1910 8
Positional queen sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0jrZ0Z0Z Zbs0Zpop pl0o0Z0a Z0ZPoPZ0 pS0Z0Z0O ZNO0ZQO0 0O0Z0Z0Z ZKZRZBZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1915 8 7 6 5 4 3 2 1
1918
rZqZ0ZkZ s0Z0opap 0m0o0mpZ OBoPZ0Z0 0Z0ZPZ0Z LRZ0Z0Z0 0O0M0OPO Z0A0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1920
rZbZkZ0Z Z0Z0opZ0 0Z0o0Z0Z o0oPZ0Z0 0l0Z0SnZ Z0M0Z0O0 POQZPZrZ Z0S0Z0ZK a
c
rZbZ0s0j Z0o0Z0ap 0o0m0m0Z Z0ZPM0Z0 0ZPZ0Z0Z M0ZQZ0Oq 0Z0ZBZ0S ZRA0Z0J0 a
1917 8
b
1919
0ZkZ0a0s obZrZpZ0 0Z0Z0O0Z ZqmpZ0Z0 NopZ0ZQZ Z0Z0A0O0 0O0Z0OBO S0Z0ZRJ0 a
0Zrl0a0Z Z0ZnZnj0 0oQo0Z0Z ZPZPo0op 0ZNZPo0Z Z0ZNZPZP 0Z0ZBZPZ Z0Z0S0J0 a
1916 8
Positional queen sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrakZ ZpZ0ZpZp 0Z0obZpZ ZNmpm0Z0 plPZPZ0Z Z0Z0ZPZ0 PO0A0ZPO Z0LRSBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1921 8 7 6 5 4 3 2 1
1924
rm0s0ZkZ o0Z0Z0a0 0ZpZbopZ Z0ZPo0Zp 0l0ZPZnA ZNM0Z0Z0 PZ0ZBOPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1926
rs0Z0ZkZ Z0Z0opap 0Z0o0mpZ Z0oPZ0Z0 0mqZPA0Z ZPM0ZNZP PZ0S0OPZ S0ZQZ0J0 a
c
0Zks0Z0s opZ0mpop 0ZnZbZ0Z Z0ZPZqZ0 0Z0Z0Z0Z A0O0ZBZ0 PZ0Z0OPO S0ZQS0J0 a
1923 8
b
1925
rZ0ZqZkZ Zpo0Z0an 0Z0o0Zpo o0mPZ0Z0 0ZPZ0sBA OPM0Z0Z0 0Z0Z0O0O Z0SQS0J0 a
0Z0Z0ZkZ M0obZ0Zp 0o0m0a0Z o0oPo0Z0 0ZPZPo0O O0Z0ZqZ0 0O0Z0OBZ Z0J0L0ZR a
1922 8
Positional queen sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0ZkZ Z0sbapo0 0ZqZpZ0o ZpZpO0Z0 nO0A0Z0Z Z0Z0LNZ0 PZBZ0OPO ZRS0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1927 8 7 6 5 4 3 2 1
1930
rsbl0ZkZ Z0Znapop 0ZQo0Z0Z M0ZPo0Z0 0oBZ0Z0Z Z0Z0A0Z0 0OPZ0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1932
0ZrZrZkZ ZblnZpap pZ0Z0mpZ O0Z0o0Z0 0ABZPZ0Z ZNZ0ZNZ0 0O0Z0ZPO Z0S0LRZK a
c
0ZrlrZkZ Z0Z0Zpap pZ0Z0ZpZ Z0Z0Z0Z0 0Z0ZbZ0Z L0ApO0Z0 PO0ZBOPO Z0SRZ0J0 a
1929 8
b
1931
rZ0lka0s opZnZpop 0Z0o0Z0Z ZBZPm0Zb 0Z0Z0Z0Z Z0M0ANZP PO0Z0OPZ S0ZQJ0ZR a
rZbZ0skZ ZpZnopap nZpo0ZpZ o0M0Z0Z0 Pl0OPZ0Z ZRM0APZ0 0O0Z0LPO Z0Z0JBZR a
1928 8
Positional queen sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0skZ ZbZnapop pZ0opZ0Z lpZ0ZPO0 0Z0ZPZ0Z O0M0ABZ0 0OPZ0L0O S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1933 8 7 6 5 4 3 2 1
1936
rZ0ZrZkZ onZ0Z0ap 0onZplpZ Z0ZpZ0M0 0O0Z0Z0Z Z0O0A0O0 0O0Z0OBO S0ZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1938
qZ0Zrs0j Z0Z0L0Z0 po0o0Z0o Z0oPaPo0 PZ0Z0Z0Z Z0O0S0ZP BO0Z0OPZ Z0ZRZ0J0 a
c
0Z0ZrZkZ opl0Zpop 0ZPZ0Z0Z Z0Z0s0mb PZpZ0Z0M A0O0Z0O0 0ZBZ0Z0O ZRZ0LRJ0 a
1935 8
b
1937
rZbl0s0j ZpZ0Zpap pZ0o0ZpZ Z0ZNm0ON 0ZPZ0Z0Z ZPZ0ZQZ0 PZ0A0ZBO Z0S0ZRZK a
rm0Z0skZ Z0Z0opap 0Z0o0mpZ OpoPZ0Z0 0l0ZPO0Z S0MQZ0Z0 0O0A0ZPO Z0Z0J0MR a
1934 8
Positional queen sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0l0skZ o0ZpZ0mp QonOpZpZ Z0ZrOpZ0 0Z0Z0O0Z O0Z0ANZ0 0Z0Z0ZPO S0S0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1939 8 7 6 5 4 3 2 1
1942
rZ0Zka0s opo0ZpZp 0ZnZ0Z0Z ZBZpO0o0 0Z0Onobl Z0O0ZQZ0 PO0M0ZPO S0A0ZKMR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1944
0Z0ZrZ0l o0Z0Znj0 0Z0o0ZbZ ZpZPo0Z0 0ZpZ0ZPZ Z0O0Z0ZB PO0LNl0Z J0Z0ZRZR a
c
rZ0l0s0j opo0Z0op 0Zna0Z0Z Z0Z0ZbA0 0ZBORZ0Z Z0Z0ZNZ0 PO0Z0OPO S0ZQZ0J0 a
1941 8
b
1943
0Z0ZrZkZ Z0ZnZpap pZ0o0mpZ spZPZ0Z0 0ZqZPO0Z ZRM0Z0A0 0OQZBZPO Z0Z0S0ZK a
bZrZra0j Z0lRZpop po0Z0A0Z Z0Z0oPZ0 Pm0ZpZ0Z Z0M0Z0L0 0OPZNZPO Z0ZRZ0ZK a
1940 8
Positional queen sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0s0j Z0Z0l0op 0ZpZ0Z0Z ZpO0ZpZ0 rLBZpZ0Z Z0Z0O0Z0 PZ0Z0OPO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1945 8 7 6 5 4 3 2 1
1948
0Z0ZnZ0Z Z0ZbskZp qo0o0ZpZ Z0oPZpLn PZPZ0Z0Z Z0A0ZNZP 0Z0Z0OPZ ZRZ0ZBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1950
0s0Z0s0j Z0ZqZ0ap 0ZnobZ0Z o0ZNZpZQ 0Z0ZpO0Z Z0O0M0OB PZ0Z0Z0O Z0ZRZRZK a
c
0Zrs0ZkZ Zbl0Zpop pZ0ZpZ0Z Z0m0o0ZN Pm0ZPZ0Z ZPZ0Z0O0 0Z0ZQOBO ZNSRZ0J0 a
1947 8
b
1949
rZ0Z0skZ ZpZbZ0mp pZ0o0lpZ ZPoPZpZ0 0ZPZ0Z0Z Z0ZBZNZP 0O0LROPZ S0Z0Z0J0 a
0Z0Z0ZkZ Z0M0Zpap 0Z0obZpZ SpZ0s0l0 0Z0ZPo0Z Z0OBZ0Z0 0O0ZQOPO Z0Z0Z0ZK a
1946 8
Penetration
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZkZbs0Z opZ0l0Zp 0ZnZpo0L Z0Z0ZpZ0 0O0Z0ZrZ Z0O0ZNZ0 PZ0S0OPO Z0ZRZBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1951 8 7 6 5 4 3 2 1
1954
0Z0ZkZ0Z Z0mnZpZ0 0ZqZpZpZ o0ZpO0Mp PZpO0M0O LrO0S0O0 0Z0Z0O0Z Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1956
0ZrZ0skZ Z0ZbZpo0 0m0ZpZ0o o0ZpO0ZP 0aqO0Z0Z ZRM0ZNZ0 0O0Z0OPZ SBZQZ0J0 a
c
rZ0Z0Z0Z o0o0jpo0 0obZpZ0o Z0Z0ZqZ0 0ZPZ0O0Z Z0Z0L0O0 PO0Z0Z0O Z0JRZRZ0 a
1953 8
b
1955
0s0Z0m0Z oqZkZ0Z0 0Z0ZpZpZ Z0ZpOpZp 0o0O0Z0O Z0Z0Z0ZN PORZ0OPJ Z0L0Z0Z0 a
rZbl0skZ Z0ZnZ0op pZ0ZpZ0Z Z0Zpo0Z0 NL0Z0O0O Z0Z0Z0ZR POPZ0ZPZ Z0JRZBZ0 a
1952 8
Penetration
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0ZrZ ZpZnjpZ0 0ZbZpZpZ o0ZpO0Zp PZ0M0O0O ZPS0Z0ZR 0JPZBZPZ Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1957 8 7 6 5 4 3 2 1
1960
0Z0Z0Z0s opZbj0Z0 0Z0ZpZ0Z Z0ZpOps0 0O0M0Z0o Z0ZPJ0Z0 PZ0Z0SPO Z0Z0ZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1962
0lrZ0akZ ZbZnopZp 0o0o0mpZ ZNZPZ0Z0 0Z0Z0Z0Z Z0M0A0ZP 0OPLBOPZ S0Z0Z0J0 a
c
rZ0ZkZ0s o0Z0a0o0 0ZpZ0ZpZ Z0ZpZpZn 0Z0O0Z0Z Z0M0Z0Z0 PO0A0OPO Z0S0S0J0 a
1959 8
b
1961
rZ0Z0j0Z Z0Zqapo0 pZbZpZ0s Z0OpZPZp 0Z0A0Z0Z Z0M0Z0ZQ PZPZ0ZPO ZRZ0S0J0 a
0Z0Z0Z0Z spZnZ0jp 0ZbZ0opZ Z0lNo0Z0 0ZPZPZ0Z Z0Z0ZPZP 0L0Z0ZPJ Z0ZRZBZ0 a
1958 8
Penetration
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZkZ0s Z0Z0m0Zp pZ0Zpm0Z ZpZpZ0Z0 0Z0O0Z0Z O0O0ZNZ0 0Z0AKOPZ ZRZ0Z0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1963 8 7 6 5 4 3 2 1
1966
rZbl0skZ Zponm0ap pZ0o0Z0Z ZNZPo0o0 0ZPZPo0Z Z0Z0ZPZ0 PO0ZBAPO S0ZQMRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1968
0sbj0Z0s o0Zqapop 0Z0o0mnZ ZNoPo0Z0 QZPZPZ0Z Z0Z0ANZ0 PZ0ZBOPO S0Z0ZRJ0 a
c
rZ0Zka0s oplbZpop 0Z0Zpm0Z Z0ZpZ0Z0 0m0O0O0Z O0Z0ONZ0 0O0M0ZPO SBAQJ0ZR a
1965 8
b
1967
0sba0s0j Z0Z0ZqZp pZ0o0Z0Z O0oPonZ0 0ZPZBZ0Z Z0Z0A0ZP 0Z0MQORZ S0Z0Z0J0 a
rZblnZ0Z opo0mrak 0Z0o0Zpo Z0ZPZ0Z0 0ZPZNA0Z Z0ZNZ0O0 PO0L0ZBO S0Z0ZRJ0 a
1964 8
Penetration
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0s0j lpZ0Z0Zp 0mpo0ZpZ oPZ0ZnZ0 PZ0O0Z0Z ZQZ0ZNZP 0Z0ZROPZ Z0Z0SNJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1969 8 7 6 5 4 3 2 1
1972
0Zbs0s0j o0Z0Z0o0 0o0l0a0o m0o0ZpZ0 PZ0O0Z0O Z0O0ZNZ0 BZQZROPZ Z0A0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1974
0Z0ZrakZ o0Z0ZpZ0 0ZpZ0o0o l0Z0mQZ0 0Z0A0Z0Z Z0Z0Z0O0 PZ0ZrOBO Z0ZRZRJ0 a
c
0Z0ZkZ0Z Z0o0mpZr popZ0apZ Z0Z0M0Zp 0Z0ZPO0Z Z0O0A0ZP PO0Z0O0Z Z0ZRZ0J0 a
1971 8
b
1973
kZ0ZrZ0s opZnZ0Zp 0Zpl0ZpA Z0Zpa0Z0 0Z0Z0Z0O Z0O0ZQO0 POBZROKZ Z0Z0S0Z0 a
0ZqZ0s0j Z0Zbmpo0 0o0ZpZ0o o0ZpO0ZP 0Z0O0Z0Z Z0ZBZNS0 PO0L0OPZ Z0Z0J0Z0 a
1970 8
Penetration
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZkZ0Z0s Z0orZpo0 0onZ0a0Z o0o0oPAp PZNZPZ0Z Z0OPZ0ZP 0O0ZKO0Z S0Z0Z0S0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1975 8 7 6 5 4 3 2 1
1978
0Z0S0Z0Z opZ0skm0 0ZpZ0lpZ Z0O0o0Zp 0O0ZPZ0Z Z0Z0L0O0 PZ0A0OKZ Z0Z0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1980
0ZrZnskZ o0Z0Z0op 0o0Zqo0Z m0o0o0Z0 QZ0ZPZ0Z O0O0A0Z0 0Z0ZBOPO ZRZRZ0J0 a
c
0Zbl0skZ Z0Z0ZnZp Bo0Z0ZpZ Z0Z0ZpZ0 PZ0spZ0Z ZPZ0Z0ZP 0Z0ZQOPM S0Z0S0J0 a
1977 8
b
1979
0ZrlnskZ ZpZbapop 0Z0o0Z0Z O0ZPo0Z0 0ZnZPZ0Z ZNM0Z0LP 0Z0ZBOPZ S0A0ZRJ0 a
rZbZ0skZ Z0Z0l0Zp pZ0ZpopZ Zpm0M0Z0 0Z0S0Z0Z Z0Z0L0Z0 POPZBOPO Z0JRZ0Z0 a
1976 8
Penetration
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0Z0Z ZpZ0Z0Z0 0Z0ObZka ZPmNopZ0 0ZPZ0Z0o Z0Z0Z0ZP 0Z0ZNZ0Z ARZQJ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1981 8 7 6 5 4 3 2 1
1984
0Z0s0ZkZ ZbZ0Zpop pZ0Z0Z0Z Zpl0O0Z0 0ZrM0O0Z O0O0S0L0 0Z0Z0ZPO S0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1986
0arl0ZkZ ZpZ0Zpop pZnZ0m0Z Z0Z0o0Z0 0ONZPZ0Z O0ZrZNZ0 QA0Z0OPO S0Z0S0J0 a
c
0Zrlka0Z Z0Z0ZpZQ pZPo0Z0Z ZpZ0Z0s0 0Z0Z0Z0Z M0OpZ0O0 PO0Z0O0O S0Z0J0ZR a
1983 8
b
1985
0Z0s0skZ opo0Z0op 0Z0ZbZ0Z l0Z0O0Z0 0Z0Z0Z0Z Z0OPS0Z0 PZ0L0Z0O J0Z0ZBS0 a
0Z0lrZkZ Z0ZnZpap 0Z0o0ZpZ ZpZPZ0Z0 0ZpZPOPZ ZrZ0ABZP 0O0ZRLKZ S0Z0Z0Z0 a
1982 8
Penetration
c
d
e
f
g
h
8 7 6 5 4 3 2 1
bs0l0skZ Z0Z0opap 0Z0o0mpZ ZpZNm0Z0 0Z0MPZ0Z ZPZ0Z0OP RZPZ0OBZ Z0AQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1987 8 7 6 5 4 3 2 1
1990
rZ0l0s0Z Z0Znmpak bZpZpZpo opZpZ0Z0 0Z0OPA0Z OBM0ZQZ0 0OPZNOPO Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1992
0Z0ZrZ0Z obZ0Zpjp 0o0m0lpZ Z0ZPM0Z0 0L0Z0Z0Z ZBZ0Z0ZP PZ0Z0OPZ Z0Z0S0J0 a
c
0s0aqZkZ Z0Z0Zpop 0Z0o0ZbZ Z0oPZBO0 PsNZPS0Z ZPZ0Z0S0 0ZQZ0O0Z Z0J0Z0Z0 a
1989 8
b
1991
rZ0l0Zks opo0ZpZ0 0Z0o0Opm Z0Z0ZnAp 0Z0Z0Z0O Z0L0ZPZ0 POPZ0O0Z Z0J0SBZR a
0s0s0Z0Z lbZ0j0m0 0o0o0o0Z o0oPo0o0 0ZPZPZNo ZRO0ZPZ0 PS0Z0APO Z0L0Z0J0 a
1988 8
Penetration
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZkZ0s o0Z0mpop bo0ZpZ0Z Z0ZpO0Z0 qZ0Z0Z0Z O0ZBZQZ0 0ZPA0OPO SRZ0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1993 8 7 6 5 4 3 2 1
1996
rZ0s0ZkZ opZ0Zpo0 0Zplbm0o Z0Z0S0Z0 0O0O0Z0Z O0ZqZ0M0 0Z0Z0OPO ZBZ0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
1998
0Z0Z0Zns opZkmrZ0 qZ0ZpZ0o O0ApOpoN 0ZpO0Z0Z Z0O0Z0Z0 0ZPZQOPO SRZ0Z0J0 a
c
rZ0lrakZ ZbZ0ZpZn 0m0o0Zpo o0ZPo0Z0 Po0ZPZ0Z ZPZ0ANMP 0ZBZQOPZ S0Z0S0J0 a
1995 8
b
1997
0jrZba0s ZpZ0mpZ0 0Z0ZpZpo oPZpO0ZP PZ0M0L0Z Z0OqA0Z0 0Z0M0OPZ S0S0Z0J0 a
0Zks0a0s opo0Z0Zp 0ZnZ0o0Z Z0ZqZ0o0 0ZNO0Z0Z ZQZ0Z0A0 PO0Z0OPO Z0S0S0J0 a
1994 8
Penetration
c
d
e
f
g
h
8 7 6 5 4 3 2 1
kZ0s0a0s opZ0Zpo0 qmpZpm0o Z0Z0Z0ZP 0ZPONZPZ Z0Z0ZNZ0 PO0AQO0Z ZKSRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
1999 8 7 6 5 4 3 2 1
2002
rZ0Z0skZ Z0ZnZ0op 0l0Z0Z0Z opo0mbA0 0Z0Z0Z0Z Z0Z0Z0ZP PO0M0OPZ ZBSQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2004
0Z0Z0skZ Z0onZ0a0 0ZNo0Zpo o0ZPo0Zq 0ZPZPmbZ O0Z0A0Z0 0ZQM0ZPO Z0Z0SBZK a
c
rZbl0s0j opZ0ZnZp 0Z0o0Zpa Z0ZPopZn 0O0ZPZ0Z ONMQZPO0 0ZRZBA0O Z0Z0J0ZR a
2001 8
b
2003
0Z0ZrskZ ZpZ0Zpa0 pZ0o0mpo l0o0Z0Z0 0ZPmPO0A Z0M0Z0ZP PO0Z0LPZ ZBZ0SRZK a
rZbl0s0Z opZnZnj0 0ZpZ0Zpa Z0O0opZp 0O0ZPZ0Z ZQM0Z0A0 PZ0MBOPO Z0ZRZRJ0 a
2000 8
Activation of pieces
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ opo0m0ap 0Z0o0o0m Z0ZPo0o0 0ZPZPZ0Z Z0M0Z0AP PO0MBOPZ S0ZQJ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2005 8 7 6 5 4 3 2 1
2008
rZbl0skZ o0Z0ZnZp 0Z0o0mpa Z0oPopZ0 0ZPZPZ0Z ONM0ZPZ0 0Z0ZBAPO ZRZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2010
rZ0ZrZkZ ZbZ0Zpap plpZ0ZpZ ZpZ0o0Z0 PO0ZPm0Z Z0O0Z0ZP 0AQM0OPZ S0Z0SBJ0 a
c
0sbZrmkZ Z0l0apZp po0opZpZ Z0Z0Z0O0 Pm0ZPO0Z Z0M0A0ZR 0OPZ0ZBO S0MQZ0ZK a
2007 8
b
2009
0ZkZ0Zrs ZplbZpo0 pZ0Zpm0Z Z0Z0a0Ap 0Z0M0Z0Z ZBO0ZQZP PO0Z0OPZ Z0ZRS0ZK a
rZ0lka0s Z0ZnZpo0 0Z0ZbZ0o ZBm0o0Z0 po0oPZPO Z0Z0ZPM0 POPMQA0Z S0Z0J0S0 a
2006 8
Activation of pieces
c
d
e
f
g
h
8 7 6 5 4 3 2 1
bZ0m0lkZ Z0Zrapo0 pZ0ZpZ0Z ZpZ0O0Z0 0Z0Z0ZRO O0M0Z0Z0 0OPZQZPZ Z0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2011 8 7 6 5 4 3 2 1
2014
0Zrs0ZkZ lbZnapop pZ0opZ0Z ZpZ0M0Z0 0Z0ZPZ0Z OPZ0Z0OP 0APZ0OBZ ZNSQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2016
0Z0Z0s0j Z0l0Z0Zp pZ0mBZpZ Z0Z0a0Z0 0Z0Z0Z0L O0Z0A0Z0 0OPZ0Z0O S0Z0Z0J0 a
c
0Z0Zrs0j Zpl0Z0o0 pZbZpm0o Z0Z0ZpZ0 0Z0S0Z0O ZBO0Z0O0 PO0ZQO0Z Z0ARZ0J0 a
2013 8
b
2015
rZqs0ZkZ ZpZ0apo0 pZnZ0m0Z Z0Z0oPZp 0ZPo0Z0Z OPZQZ0OP 0A0ZNOBZ S0Z0ZRZK a
0Z0Z0skZ ZbZns0Zp 0Z0o0ZpZ o0lPZpZP Po0S0L0Z ZBZ0Z0M0 0OPZ0ZPZ Z0J0Z0ZR a
2012 8
Activation of pieces
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0s0Z0j o0lnZpo0 0Z0ZpZ0o Zbo0O0ZP 0ZpZBL0Z Z0Z0ZNZ0 PO0Z0OPZ Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2017 8 7 6 5 4 3 2 1
2020
rZbZ0s0j opZna0Zp 0lnZpZ0Z Z0ZpO0o0 0Z0O0ZBZ Z0Z0ANO0 PO0Z0J0O Z0SQZ0MR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2022
0Z0arskZ ZbZqZ0Zp pZnZpo0Z Z0Z0Z0ZQ 0oNo0O0M ZPZPZ0A0 PZ0Z0ZPO Z0Z0SRJ0 a
c
0Z0srZkZ Z0Z0Zpo0 pZnZ0Z0Z ZpZnoqZp 0Z0Z0Z0Z Z0OPZPOb PS0LNA0O Z0ZRZ0JB a
2019 8
b
2021
0ZnZqj0s mpZ0apo0 0Z0ZpZ0o ZbZpO0ZP pO0O0Z0Z O0ZBZ0Z0 0A0MQOPZ Z0Z0MRJ0 a
0s0ZrZkZ Z0ZnZpap 0Z0obZpZ l0o0Z0Z0 No0ZPZnZ ZPZ0ZPZ0 PZNLBZPO Z0SRA0J0 a
2018 8
Activation of pieces
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ Z0ZnZpo0 0oplpZ0o o0Z0Z0Z0 0ZPORZ0Z ZPA0Z0O0 PZ0Z0O0O Z0LRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2023 8 7 6 5 4 3 2 1
2026
0Z0Z0Z0Z o0ZQZ0o0 0j0Z0lbo Zpm0Z0Z0 0ZpZ0Z0O Z0O0ZPZ0 0Z0Z0APJ Z0Z0ZBZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2028
rZ0l0j0s ZpZbapZ0 pmnZpZpZ Z0ZpO0Zp 0Z0O0O0Z O0ZBZNZ0 0O0ANZPO SQZ0ZRJ0 a
c
0Z0s0ZkZ l0Z0Zpop pZ0Z0Z0Z Z0Z0O0Z0 0opO0S0Z ZnO0Z0ZP 0L0Z0ZPZ ZBZ0Z0J0 a
2025 8
b
2027
rZ0ZnZ0j Z0oqZ0Zp pZ0Z0snZ ZpSPo0o0 0Z0ZPo0Z Z0ZQZPZP PO0ZNAPZ Z0S0Z0J0 a
0Z0s0skZ opl0Zpo0 0ZnZ0m0o Z0o0Z0Z0 0Z0OpZPZ O0O0O0Z0 BZ0Z0OPZ ZRAQZRJ0 a
2024 8
Activation of pieces
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lrZ0Z opZ0a0ok 0ZnZpZ0o Z0Z0m0ZQ 0Z0oNA0O Z0Z0Z0O0 PO0Z0OBZ Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2029 8 7 6 5 4 3 2 1
2032
rZ0s0mkZ Zplnapop 0ZpZpZbZ o0Z0Z0Z0 0ZPO0Z0Z OPA0MBZ0 0Z0M0OPO S0LRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2034
0ZrZkZ0s Z0l0Zpop pZbZpZ0Z mpZ0Z0Z0 0a0ZPZ0Z Z0M0A0Z0 POPZBLPO Z0ZRZRZK a
c
rZblrZkZ opZ0ZpZp 0Z0Z0ZpZ Z0oPZ0Z0 0Z0aPO0Z ZRZ0A0Z0 PZQZBZPO Z0Z0J0ZR a
2031 8
b
2033
0Zrl0skZ ZpZ0apop pZ0onZ0Z Z0Z0Z0Zb PZ0MPAnZ Z0MBZ0Z0 0OPL0ZPO S0Z0ZRZK a
0Z0l0arj o0ZrZ0Zp 0opo0o0Z Z0Z0mPo0 0ZPZ0ZPZ ZPZ0APZ0 PZ0S0LPZ Z0ZRZBJ0 a
2030 8
Activation of pieces
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0j0s Z0Z0opap pZRZ0ZpZ lpZPm0Z0 0Z0ZPA0Z Z0ZBZ0Z0 0ZNZ0OPO Z0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2035 8 7 6 5 4 3 2 1
2038
0Z0Z0skZ opZbm0sp 0lnZ0ZpZ Z0ZpZ0M0 0ZpO0ZPL O0O0Z0S0 0Z0ABO0O S0Z0J0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2040
0s0ZqskZ Z0ZnZpZ0 bZpo0ZpZ o0Z0a0Zp 0Z0ZPZPO ZBM0MPZ0 PO0L0Z0Z ZKZRZ0ZR a
c
rZ0lrmkZ Z0o0a0op 0Zpobo0Z o0Z0oNZ0 0Z0OPZ0M Z0O0Z0Z0 PO0Z0OPO S0AQS0J0 a
2037 8
b
2039
0s0Z0skZ Z0Z0Zpo0 RZpZpZ0Z ZpZnZnZ0 0Z0Z0l0Z ZQZ0Z0ZP 0OPZBAPZ Z0ZRZ0J0 a
rZ0ZkZ0s obl0apop 0ZnZpZ0Z Z0o0Z0Z0 0ZPZ0ZnZ O0MBANZ0 0OQZ0OPO S0Z0S0J0 a
2036 8
Activation of pieces
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0Z0Z Zpl0Zpjp 0Z0onZpZ o0Z0Z0Z0 0ZPZ0Z0Z Z0Z0S0Z0 PO0L0OPO ZBZ0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2041 8 7 6 5 4 3 2 1
2044
rZbZ0skZ ZpZ0Zpap 0Z0Z0mpZ lNZ0m0Z0 pZ0ZPZ0Z O0M0A0Z0 0O0ZBZPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2046
0ZrZ0skZ opZ0ZnZp 0Z0oblpZ ZPm0opZ0 0ZPZ0Z0Z Z0Z0MPO0 PA0Z0ZBO Z0ZRLRZK a
c
rZbZrZkZ opZ0Zpop 0Znl0m0Z Z0apZ0Z0 0Z0Z0Z0Z Z0OBZNZP POQM0OPZ S0A0ZRJ0 a
2043 8
b
2045
0Z0ZnZkZ Zpsqorap pZ0o0Z0Z Z0ZPZpZ0 0O0A0Z0Z ZPZ0ZPZ0 RZ0L0ZPO Z0Z0SBJ0 a
0Z0Z0Z0s opl0spj0 0Z0Z0mpZ Z0oPZpZ0 0ZPZ0O0o ZPLBZRZP PZ0Z0ZPZ S0Z0Z0J0 a
2042 8
Activation of pieces
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ m0Znapop 0Z0ZpZ0Z Z0ZpO0Z0 0o0O0Z0O oPZ0ZNOB PZ0Z0O0M S0AQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2047 8 7 6 5 4 3 2 1
2050
rZbl0skZ ZpZ0Zpop pZ0ZpZnZ Z0ZnM0O0 0Z0ONZ0Z Z0Z0Z0Z0 PO0Z0OPZ SBZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2052
0sqZ0skZ Z0Z0apop pZbo0m0Z O0ZpZ0Z0 0Z0OpZ0Z Z0O0Z0Z0 QOBM0OPO S0A0ZRJ0 a
c
rZ0s0ZkZ oplnZpap 0ZpZpZpZ Z0Z0O0Z0 0ZBZ0O0Z Z0L0A0Z0 POPZ0ZPO S0Z0S0J0 a
2049 8
b
2051
rZ0ZkZ0s ZbZ0apop plnZpZ0Z Z0ZnO0Z0 Po0ZNZ0Z Z0ZBZNZ0 0O0Z0OPO S0AQS0J0 a
0Zks0Z0s lpZ0Z0o0 0ZnZ0Z0o Z0ZpZpZ0 0Z0O0Z0Z Z0Z0A0Z0 PO0L0OPJ S0Z0S0Z0 a
2048 8
Activation of pieces
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0l0skZ Z0Z0Zpap 0Zno0mpZ ZbZ0o0Z0 0Z0ZPZ0Z ZPZ0APO0 PZ0LNZBO Z0SNJ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2053 8 7 6 5 4 3 2 1
2056
rZrZ0Z0j obZ0l0Zp 0Z0Z0ZnZ ZBM0a0A0 0Z0opZ0Z Z0Z0Z0O0 PO0L0Z0O Z0S0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2058
rZ0Zka0s opZ0Zpop 0ZNZpm0Z l0Z0Z0Z0 0Z0O0Z0Z Z0M0Z0ZP PO0ZbOPZ S0AQZRJ0 a
c
bZ0ZrZkZ L0Z0spo0 0Mpl0Z0Z Z0ZpZ0Z0 0Z0ZBZ0Z ZPZ0O0O0 PZ0Z0O0Z Z0SRZ0J0 a
2055 8
b
2057
rZ0l0skZ ZpZ0Zpap 0Z0oPZpZ o0Z0Z0Z0 PZ0A0Z0Z Z0Z0ZPZ0 0OPZ0ZPO S0ZQJ0ZR a
rZ0l0skZ opZnZpo0 0ZpZpmpZ Z0ZpZ0Z0 0aPO0Z0Z Z0M0ONZ0 PO0AQOPO S0Z0ZRJ0 a
2054 8
Intermediate move
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0skZ opZ0apo0 0ZBZpZqZ Z0o0Z0Zp 0Z0Z0Z0Z ZPZPO0ZQ PS0Z0OPO Z0A0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2059 8 7 6 5 4 3 2 1
2062
0s0lka0s o0ZpZ0op bZ0ZpZ0Z Z0o0OpZ0 0o0ZnM0O Z0Z0Z0O0 POPZ0OBZ S0AQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2064
0Z0ZrZkZ Z0Z0ZpZ0 0Z0ZbZpZ l0apOPZp 0Z0A0ZnO Z0MBZ0L0 Ps0Z0ZPZ Z0ZRZRJ0 a
c
0Z0srZkZ MpZ0Z0Zp 0ZpoblpZ Z0m0a0Zn 0OPZPo0Z Z0M0ZPZ0 PZ0LBAPO Z0SRZ0J0 a
2061 8
b
2063
rZ0lrZkZ ZpZ0Zpo0 pZna0m0o Z0O0obZ0 PO0o0Z0Z Z0ZPZNO0 0ZNZ0OBO ZRAQS0J0 a
rZ0ZrZkZ Z0Z0Zpap 0l0Z0mpZ opZPMBA0 0ZpZ0L0Z O0M0Z0ZP 0O0Z0OPZ m0Z0S0J0 a
2060 8
Intermediate move
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0Z0j ZpZ0ZpZp pZpZbl0Z Z0Z0ZNZ0 PO0ZPL0O Z0aBZ0Z0 0Z0Z0OPZ Z0S0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2065 8 7 6 5 4 3 2 1
2068
0s0snj0Z opZ0Z0ob 0Z0Zpo0o M0Z0Z0Z0 PO0mPZ0Z Z0M0ZPZ0 0Z0Z0JPO Z0SRZBZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2070
rZ0l0s0j apZ0Zpop 0ZpO0mnZ o0Z0ZbM0 0Z0ZNZ0Z O0Z0Z0ZP BOQA0OPZ Z0S0S0J0 a
c
rZ0Z0skZ ZNZ0Zqo0 pZ0ZRmpo ZpZ0Z0Z0 0Z0O0Z0Z ZQZ0Z0Z0 PO0Z0OPO Z0S0Z0J0 a
2067 8
b
2069
0Z0lrjnL obs0ZpoB 0o0ZpZ0o Z0Z0a0Z0 0Z0O0Z0Z O0o0Z0M0 0O0Z0OPO Z0ZRS0J0 a
rZ0l0skZ Z0Znapo0 0Z0ZpZ0o o0o0O0Z0 0o0O0Z0O Z0ZBZbZR POQA0OPZ S0Z0J0Z0 a
2066 8
Intermediate move
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0ZkZ Z0oqZpob 0Z0Z0Zno Z0A0O0Z0 0Z0Z0ZPZ ZBOnZQZP 0Z0M0O0Z Z0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2071 8 7 6 5 4 3 2 1
2074
rZ0l0skZ ZpobZpo0 pZnZ0Z0o Z0Z0oNZ0 0Z0ZPZ0Z ZBO0ZQZ0 PO0Z0OPO S0aRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2076
0ZbZ0ZkZ o0L0ZpZ0 0o0ZpapZ m0Z0Z0Z0 0Z0OPZ0Z Z0ZBZNZ0 Pl0Z0OPZ Z0Z0Z0J0 a
c
rZ0Z0Z0s o0Znj0a0 0Z0ZBl0o Zpo0M0Z0 PZpO0OQZ Z0M0Z0Zp 0O0Z0ZbO S0Z0J0S0 a
2073 8
b
2075
rZ0Zkans opo0Zpop 0ZnZ0Z0Z Z0Zqo0Z0 0ZBO0Z0Z Z0O0ZbZ0 PO0M0OPO S0AQJ0ZR a
0Zks0Z0s opoqapZ0 0ZnZ0m0o Z0ZpZ0Z0 QZ0O0ZpZ Z0OBZNA0 PO0Z0OPO S0Z0S0J0 a
2072 8
Intermediate move
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ opo0ZpAp 0ZnZ0ZpZ Z0ZnZ0Z0 0ZPZ0Z0Z ZPZ0O0Z0 PZ0LNOPO S0Z0JBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2077 8 7 6 5 4 3 2 1
2080
0s0l0skZ Z0ZQZpop 0Z0Z0abZ ZpZ0o0M0 0Z0Z0Z0Z MBO0m0ZP 0O0Z0OPZ Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2082
rZ0ZrZkZ o0Z0apop qZbZ0m0Z Z0Z0ZQZ0 0o0A0Z0Z ZBMRZ0Z0 POPZ0ZPO Z0J0ZRZ0 a
c
0ZqZrZkZ Z0ZbZpZ0 pZ0o0apo ZpZ0O0Z0 0O0Z0O0Z O0Z0Z0MP BZrL0ZPZ Z0ZRS0J0 a
2079 8
b
2081
rZ0lkZ0s opZNZpo0 0ZpapZ0o Z0ZpZ0Z0 0ZPObZ0Z ZPZ0O0Z0 PA0ZBOPO S0ZQJ0ZR a
rZ0Z0j0s obS0Zpop 0o0apm0Z Z0ZqZ0Z0 QZ0O0Z0A Z0Z0O0Z0 PO0M0OPO Z0Z0JBZR a
2078 8
Intermediate move
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rl0ZrZkZ obZ0mpo0 0o0Z0Z0Z Z0ZBZ0Op 0Z0Z0ZQZ ZPZ0Z0O0 PA0ZPZ0O S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2083 8 7 6 5 4 3 2 1
2086
0ZrsqZkZ ZbZ0opap 0ZpZnmpZ o0Z0M0Z0 Po0OPZ0Z ZQM0A0Z0 0O0ZBOPO Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2088
0ZrZrm0Z ZpZ0ZkZ0 pZ0o0mpo l0ZPO0Z0 PZpZ0ObZ Z0OBA0ZP 0Z0L0ZPZ S0Z0ZRZK a
c
rZbZ0ZkZ Z0lnZpZ0 pZ0o0ZpA Z0mPa0Z0 0opZ0Z0Z Z0M0Z0Z0 POBZ0ZPO S0ZQZRZK a
2085 8
b
2087
0Zrl0Z0s Z0Z0Zpj0 pm0a0mpZ ZpZpM0Z0 0ZpO0Z0o ZPZ0ZQM0 PZPZROPO Z0A0S0J0 a
0Z0s0skZ o0Znapop 0ZbZpZ0Z l0Z0O0Z0 0o0A0ZQZ ZBM0Z0Z0 POPZ0ZPO ZKZRZRZ0 a
2084 8
Intermediate move
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0s0j o0Z0ZPop 0Z0Z0A0Z Z0o0m0Zn 0ZBZPZ0Z Z0O0Z0Z0 PZ0ZbOPO S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2089 8 7 6 5 4 3 2 1
2092
0Z0Z0Z0Z Z0S0Zpak 0Z0Z0Zpo ZpZ0oqZ0 0O0ZQm0Z Z0ZPZ0ZP 0Z0A0OPZ s0Z0M0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2094
0Z0s0ZkZ obZqZpo0 0o0Zpa0o Z0Z0Z0Z0 0Z0M0Z0Z O0ZQA0Z0 0O0Z0OPO ZBs0S0J0 a
c
rZ0ZqZkZ o0S0Z0op 0o0ZpZ0Z Z0Z0O0OP 0Z0o0ZPZ Z0Z0Z0Z0 POQZ0Z0J Z0Z0Z0Zb a
2091 8
b
2093
0Z0Z0ZkZ opZ0Z0Zp 0ZpZ0ZqZ Z0Z0Z0AP 0ZnOrZQZ Z0Z0Z0Z0 PO0Z0S0J Z0Z0Z0Z0 a
rZbZ0Z0s Zpo0Zpj0 0M0o0ZpZ Z0ZPonl0 0O0Z0Z0Z Z0ZPO0O0 PZQA0OBZ Z0S0ZRJ0 a
2090 8
Intermediate move
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZkZ ZpZ0l0Zp pZbM0ZpZ Z0Z0o0s0 0ZPZ0Z0Z Z0Z0LrOB PO0Z0O0Z Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2095 8 7 6 5 4 3 2 1
2098
rZ0ZkZ0s ZbZqa0op pZnopZ0Z Z0m0Z0O0 0o0MPZ0Z Z0M0A0ZQ POPZBZ0O Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2100
rZ0Z0ZkZ oblnZpop 0m0Z0Z0Z L0Z0s0Z0 0ZpZPZ0Z ZNZ0APZ0 PZ0ZBZPO Z0S0ZRJ0 a
c
rZbl0ZkZ ZpZ0Zra0 pZ0o0Z0o O0O0Zpo0 0ZQMpZ0Z ZNZnO0O0 0S0Z0OBO Z0ZRZ0J0 a
2097 8
b
2099
rZ0ZrakZ Z0l0Z0op pZbZpZ0Z Z0Z0o0O0 0o0ZPZ0Z O0MRZ0Z0 0OPZ0LBO Z0Z0ZRZK a
0ZrZ0ZkZ Z0l0Zpop po0Z0O0Z Z0Z0ZRZ0 0ZpZ0Z0Z OnZ0O0O0 0A0ZQZbO Z0Z0ZRJ0 a
2096 8
Intermediate move
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZqskZ opZ0Z0a0 0Zpo0Zpo Z0ZPopA0 PO0Z0Z0Z Z0Z0ZNZP 0ZPZ0OPZ S0ZQSBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2101 8 7 6 5 4 3 2 1
2104
rl0ZrZka ZpZ0ZpZp nZponZpA oNZNZ0Z0 0ZPZPO0Z O0Z0Z0Z0 0O0Z0ZPO Z0LRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2106
0ZbZ0ZkZ ZqZ0Zpo0 0Z0S0Z0o s0Z0OpZP 0Z0L0M0Z OpZnZ0Z0 0O0Z0ZPZ ZKZ0Z0Z0 a
c
rZ0lrakZ ZpZbZ0op 0ZPo0o0Z Z0Z0ZpZ0 0mPZ0Z0Z Z0MQO0O0 0Z0ZNOBO S0Z0ZRJ0 a
2103 8
b
2105
rZbZ0skZ ZpZna0op 0l0ZpZ0Z Z0ZpO0Z0 pZ0Z0O0O OnM0ANZ0 0O0L0JPZ Z0ZRZBZR a
rZbZ0ZkZ ZpZ0Arop 0l0Z0Z0Z ZPZ0o0Z0 pZ0OnZ0Z O0Z0ZNZ0 0Z0Z0ZPO ZRZQZRJ0 a
2102 8
Intermediate move
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ ZbZ0o0ap pZ0ZPmpZ Z0L0Z0M0 0Z0Z0l0Z Z0M0Z0A0 PZ0Z0ZPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2107 8 7 6 5 4 3 2 1
2110
rZrl0ZkZ opZbapop 0ZnZ0m0Z Z0ZpZ0Z0 0Z0Z0A0Z O0M0O0Z0 0OQMBOPO Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2112
rZ0l0skZ ZbZ0apo0 po0Zpm0o Z0Z0Z0Z0 PZNO0Z0Z Z0MBZ0O0 0O0ZQOPZ S0ZRZ0J0 a
c
rZ0s0ZkZ opZ0apo0 0Z0Zbm0o l0ZpZ0Z0 0Z0L0Z0Z Z0M0A0O0 PO0ZPOBO Z0SRZ0J0 a
2109 8
b
2111
rZ0l0skZ ZbZ0apZp pZnZpmpZ ZpZ0Z0Z0 0Z0O0Z0Z OBMQZNZ0 0O0Z0OPO S0A0S0J0 a
0Z0srZkZ opZ0Zpo0 0ZnZ0l0o Z0ZpZbZ0 0Z0Z0Z0Z ZPS0ONOP PZ0L0OBZ Z0S0Z0J0 a
2108 8
Weakness of the isolated pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ opZ0lpop 0ZnZ0Z0Z Z0a0Z0Z0 0Z0obZ0Z ZPZ0ZNO0 PA0LPOBO Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2113 8 7 6 5 4 3 2 1
2116
rZbl0skZ opZ0apo0 0ZnZpm0o Z0Z0Z0Z0 0ZBO0Z0A Z0M0ZNZ0 PO0Z0OPO Z0SQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2118
rZbl0skZ o0Z0apop 0o0Zpm0Z Z0Z0M0Z0 0mBO0Z0Z Z0M0Z0Z0 PO0ZQOPO S0ARZ0J0 a
c
rZbZ0skZ opZ0apop 0ZnZpZ0Z Z0ZqZ0Z0 0ZRO0Z0Z O0ZBZNZ0 0OQA0OPO Z0Z0J0ZR a
2115 8
b
2117
rZbZ0skZ opl0mpop 0Zna0Z0Z ZBZpZ0Z0 0Z0Z0Z0A ZNZ0ZNZ0 POPZ0OPO S0ZQZRJ0 a
0Z0s0ZkZ opZrZpo0 0ZnZbZ0o l0ZpZ0Z0 0Z0Z0Z0Z ZPZ0ONZP PL0SBOPZ Z0ZRZ0J0 a
2114 8
Weakness of the isolated pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZqskZ obZ0ZpZp 0o0Z0ZpZ Z0Zpa0Z0 0Z0M0Z0Z ZPZ0L0O0 PZ0ZPOBO Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2119 8 7 6 5 4 3 2 1
2122
0Zrl0skZ opZ0opap 0ZnZ0mpZ Z0Z0ZbZ0 0Z0O0Z0Z Z0M0ANZP PO0ZBOPZ S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2124
rZ0lkZ0s ZpZ0mpo0 panZ0Z0o Z0ZpZ0Zb 0Z0Z0Z0Z ZNOBZNZP PO0Z0OPZ S0AQS0J0 a
c
0Z0Z0skZ Z0ZnZpo0 0o0ZpZ0o Z0Z0Z0Z0 0Z0O0Z0Z ZRZQZ0ZP 0O0M0OPJ Z0l0Z0Z0 a
2121 8
b
2123
0Z0s0skZ opZ0Zpop 0Znl0Z0Z Z0ZpZ0Z0 0Z0M0Z0Z Z0O0S0ZP PO0ZQOPZ S0Z0Z0J0 a
rZblrZkZ apZ0Zpop pZnZ0m0Z Z0ZpZ0Z0 0Z0Z0Z0Z ZPM0ONZ0 PA0ZBOPO Z0SQZRJ0 a
2120 8
Weakness of the isolated pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ opZ0apop 0ZnZpm0Z Z0Z0Z0Z0 0ZBO0Z0Z Z0M0ANZ0 PO0ZQOPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2125 8 7 6 5 4 3 2 1
2128
rZ0l0skZ opZ0Zpop 0a0Z0ZnZ Z0Z0Z0Z0 0Z0o0Z0Z ZNZQZ0ZP POPZ0OPZ S0A0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2130
rZbl0skZ ZpZnapop pZ0Zpm0Z Z0Z0Z0A0 PZBO0Z0Z Z0M0ZNZ0 0O0Z0OPO Z0SQZRJ0 a
c
0Zrs0ZkZ opZ0apo0 0ZbZpm0o Z0Z0M0Z0 0m0O0Z0A ZBM0Z0Z0 PO0Z0OPO Z0SRZ0J0 a
2127 8
b
2129
0ZrZ0skZ opZ0mpo0 0Z0ZpZ0o lbZ0M0Z0 0Z0O0Z0Z ZQM0Z0Z0 PO0Z0OPO Z0ZRS0J0 a
rZ0l0skZ Zpa0Zpo0 pZ0Zpm0o Z0MbMnZ0 0Z0O0A0Z O0ZQZ0Z0 0O0Z0OPO ZBS0ZRJ0 a
2126 8
Weakness of the isolated pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lkZ0s opZbmpop 0Zna0Z0Z ZBZpZ0Z0 QZ0Z0Z0Z ZNO0ZNZ0 PO0Z0OPO S0A0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2131 8 7 6 5 4 3 2 1
2134
rZ0l0skZ opZ0mpo0 0Zna0Z0o ZBZpZ0Z0 0Z0Z0ZbA ZNZ0ZNZ0 POPZ0OPO S0ZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2136
rZ0l0skZ opZ0Zpop 0ZnZbm0Z Z0apZ0Z0 0Z0Z0A0Z Z0M0ONZ0 PO0ZBOPO S0ZQZRJ0 a
c
rZ0s0ZkZ o0Z0l0Zp 0ZnZbapA Z0o0o0Z0 0oPZ0ZPZ Z0Z0ZNZP PO0ZQOBZ Z0ZRZRJ0 a
2133 8
b
2135
rZ0ZrZkZ ZplbZpop pZ0Z0ZnZ Z0apZ0Z0 0ZnM0Z0Z Z0OBZNZP POQZ0OPZ Z0ARS0J0 a
rZbl0skZ o0Z0Zpop 0onZpa0Z Z0onZ0Z0 0Z0Z0Z0Z ZPM0ZNO0 PAQOPOBO S0Z0ZRJ0 a
2132 8
Weakness of the isolated pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbs0ZkZ ZpZ0apop pZnlpm0Z Z0Z0Z0A0 0Z0O0Z0Z O0MQZNZ0 0O0ZBOPO S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2137 8 7 6 5 4 3 2 1
2140
rZ0Z0skZ opZ0lpop 0ZnZbm0Z Z0apZ0Z0 0Z0Z0Z0Z ZPM0ONZ0 PA0ZBOPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2142
rZblrZkZ opZ0Zpop 0Z0Z0m0Z Z0Zpa0Z0 0Z0Z0Z0Z ZPMBO0Z0 PAQZ0OPO S0Z0J0ZR a
c
0Z0s0Z0Z opj0Zpo0 0m0Zpm0o Z0Z0Z0Z0 0Z0Z0Z0O ZBZPZ0M0 PO0J0OPZ Z0Z0Z0ZR a
2139 8
b
2141
rZblkZ0s Z0Z0apop pZ0Z0m0Z Z0ZpZ0Z0 0Z0Z0Z0Z Z0MBZ0Z0 PO0Z0OPO S0AQZRJ0 a
rZ0l0skZ ZbZ0apop ponZ0m0Z Z0opZ0A0 BZ0O0Z0Z Z0M0ONZ0 PO0Z0OPO Z0SQZRJ0 a
2138 8
Weakness of the isolated pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0skZ opZbZpZp 0lnZpapZ Z0Z0Z0Z0 0Z0OQZ0Z O0ZBANZ0 0O0Z0OPO S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2143 8 7 6 5 4 3 2 1
2146
rZbs0ZkZ opl0apZp 0ZnZpZpZ Z0ZnZ0M0 0Z0O0Z0Z OBZQZ0Z0 0O0ZNOPO S0A0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2148
rZbZ0skZ ZpZ0lpop pZ0a0m0Z Z0Zpm0Z0 0Z0Z0Z0Z Z0M0ONZP POQABOPZ S0ZRZ0J0 a
c
rZ0Z0ZkZ opZ0Zpop 0Zpl0ZnZ Z0Z0Z0Z0 0Z0O0ZQZ Z0Z0Z0ZP PO0A0OPZ Z0Z0S0J0 a
2145 8
b
2147
rZ0lrZkZ opZbapop 0ZnZ0Z0Z ZBZpZ0Z0 0Z0M0Z0Z Z0Z0APZ0 POPL0ZPO ZKZRZ0ZR a
rZ0lrZkZ Z0Z0Z0op pZ0Z0o0Z ZpZpm0Z0 0Z0ZbL0Z ZPZ0ZNO0 PZ0ZPOBO Z0S0ZRJ0 a
2144 8
Weakness of the isolated pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0sqZkZ Zpa0Zpo0 pZnZbm0o Z0ZpZ0Z0 0Z0Z0Z0L APMBONZ0 PZ0Z0OPO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2149 8 7 6 5 4 3 2 1
2152
rZbl0s0Z opZ0Zpjp 0ZnZpZpZ ZBZnZ0Z0 0Z0O0Z0Z ZQM0ZNZ0 PO0Z0OPO S0Z0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2154
0ZrZ0skZ ZbZ0lpop pm0ZpZ0Z ZpMnZ0Z0 0Z0O0Z0Z Z0MQZ0O0 PO0Z0OBO Z0SRZ0J0 a
c
rm0l0skZ ZbZ0apop pZ0Zpm0Z Z0Z0Z0Z0 RZ0O0Z0Z ZNZBZNZ0 0O0ZQOPO Z0A0ZRJ0 a
2151 8
b
2153
0Zrl0skZ obZ0apop 0o0Zpm0Z Z0Z0M0A0 0m0O0Z0O Z0M0Z0Z0 PO0ZQOPZ SBZRZ0J0 a
rZbl0ZkZ opZ0Zpop 0Z0Z0m0Z Z0Zps0Z0 0Z0Z0Z0Z ZPZ0Z0O0 PZ0MPOBO S0ZQZRJ0 a
2150 8
Weakness of the isolated pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0ZkZ opZ0apop 0Z0Zbm0Z l0ZpZ0A0 0Z0L0Z0Z O0M0Z0O0 0O0ZPOBO Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2155 8 7 6 5 4 3 2 1
2158
0Z0ZrZkZ opZ0spop 0Z0Z0m0Z ZqZpZ0Z0 0Z0AnZ0Z ZNZ0ZQZ0 POPZ0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2160
0Z0s0ZkZ opZrZ0op 0ZnZ0o0Z Z0ZpZ0Z0 0Z0Z0Z0Z ZPZ0OKO0 PA0S0O0O Z0ZRZ0Z0 a
c
rZ0Z0skZ opZ0mpop 0Z0l0Z0Z Z0ZpZbZ0 NZ0Z0Z0Z Z0Z0ZNZ0 POPL0OPO S0Z0ZRJ0 a
2157 8
b
2159
0Z0ZrZkZ Z0ZbZ0op pZ0Z0m0Z ZpZpZ0Z0 0Z0M0Z0Z Z0Z0Z0O0 PO0Z0OPZ ZBS0Z0J0 a
rZbZ0skZ opZ0Zpop 0lnZ0Z0Z Z0ZpZ0Z0 0Z0M0Z0Z ZPZ0O0Z0 PZ0LBOPO S0Z0J0ZR a
2156 8
Weakness of the isolated pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZqsrZkZ opZ0apop 0Z0m0m0Z Z0ZpA0Z0 0Z0Z0Z0Z ZNZQZNZ0 POPZ0OPO Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2161 8 7 6 5 4 3 2 1
2164
rZ0l0skZ opZ0apop 0ZbZpm0Z Z0Z0M0A0 0m0O0Z0Z ZBMQZ0Z0 PO0Z0OPO Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2166
rZ0lkZ0s opZbapop 0m0Zpm0Z Z0Z0Z0A0 0Z0O0Z0Z ZBM0ZNZ0 PO0Z0OPO S0ZQZRJ0 a
c
rZ0l0skZ opZbapop 0Z0Zpm0Z Z0ZnM0Z0 0Z0O0Z0Z O0M0Z0Z0 0O0Z0OPO SBAQS0J0 a
2163 8
b
2165
rZ0l0skZ ZbZ0apop po0Zpm0Z Z0Z0M0Z0 PmBO0Z0Z Z0M0A0Z0 0O0ZQOPO Z0ZRZRJ0 a
rZbZ0skZ opZ0Zpo0 0Zpl0m0o Z0Z0Z0Z0 0Z0O0Z0Z ZBS0ZNZ0 PO0Z0OPO Z0ZQS0J0 a
2162 8
Isolated pawn, attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ oplbapZp 0ZnZpZpZ Z0ZnZ0Z0 0Z0ONZ0Z O0ZBZNZ0 0OQZ0OPO S0A0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2167 8 7 6 5 4 3 2 1
2170
0Zbl0skZ s0Z0apop po0Zpm0Z Z0Z0M0Z0 PmBO0Z0Z Z0M0ZQZ0 0O0Z0OPO S0ARZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2172
rZbZ0skZ Zpl0apop pZ0ZpZ0Z Z0ZnZ0Z0 Pm0O0Z0Z Z0M0ZNZ0 0O0ZQOPO SBARZ0J0 a
c
rZbl0skZ o0Z0apZp 0onZpmpZ Z0Z0Z0A0 0Z0O0Z0Z O0MQZNZ0 0OBZ0OPO S0Z0J0ZR a
2169 8
b
2171
rZ0l0skZ obZ0apop 0o0Zpm0Z m0Z0Z0Z0 0Z0O0Z0Z O0M0ANZ0 0OBZ0OPO S0ZQS0J0 a
rZ0l0skZ opZbapZp 0ZnZpmpZ Z0Z0Z0A0 0Z0O0Z0O Z0MBZNZ0 PO0ZQOPZ Z0ZRJ0ZR a
2168 8
Isolated pawn, attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0Z0ZkZ oqZ0Zpo0 0Z0ZbZ0o ZBLpZ0Z0 0Z0Z0Z0Z Z0Z0ONZ0 PO0Z0OPO Z0Z0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2173 8 7 6 5 4 3 2 1
2176
rZ0Z0skZ opZbapo0 0m0Zpm0o l0Z0Z0A0 0Z0O0Z0O ZBM0ZNZ0 POQZ0OPZ ZKZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2178
rZbl0skZ opZ0Zpop 0ZpZ0Z0Z Z0ZnZ0Z0 0ZBO0Z0Z Z0S0ZNZP POQZ0OPZ Z0Z0S0J0 a
c
0Z0srZ0j opZ0l0op 0anZ0o0Z Z0ZpZ0Z0 0Z0ZbZ0Z ZPZ0ONO0 PZ0Z0OBO A0SRZQJ0 a
2175 8
b
2177
0Z0s0skZ oplnZpop 0ZpZ0ZnZ Z0Z0Z0Z0 0Z0ONZ0Z ZBZ0SQZ0 PO0Z0OPO Z0ZRZ0J0 a
rZ0l0skZ Z0Zbapop pZ0ZpZ0Z o0ZnM0Z0 0m0O0Z0Z Z0M0Z0Z0 0O0ZQOPO SBARZ0J0 a
2174 8
Isolated pawn, attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ obZ0Zpop 0o0ZpmnZ Z0Z0Z0A0 0ZBO0Z0Z O0MQZ0Z0 0O0Z0OPO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2179 8 7 6 5 4 3 2 1
2182
rZ0l0skZ ZpZ0apop pZbZpm0Z Z0ZnM0A0 PZ0O0Z0Z ZBM0Z0Z0 0O0ZQOPO S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2184
rZ0lbskZ ZpZ0apop pZ0Zpm0Z Z0ZnM0Z0 PZ0O0Z0Z ZBM0Z0Z0 0O0ZQOPO S0ARZ0J0 a
c
0Zrl0skZ obZ0apZp 0o0ZpmpZ Z0Z0M0A0 0m0O0Z0Z Z0M0Z0S0 PO0Z0OPO SBZQZ0J0 a
2181 8
b
2183
0Z0s0skZ opZ0Zpo0 0Z0Zbl0o Z0Zpm0Z0 NZ0Z0Z0Z O0ZBO0Z0 0O0Z0OPO Z0SQZRJ0 a
rZ0l0skZ opZ0apop 0ZpZbm0Z Z0ZnZ0A0 0Z0O0Z0Z ZBM0ZNZP PO0Z0OPZ S0ZQS0J0 a
2180 8
Isolated pawn, attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
qZ0s0ZkZ o0Zrapop 0obZpm0Z m0Z0Z0Z0 BZ0O0Z0Z O0M0ANZ0 0O0ZQOPO Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2185 8 7 6 5 4 3 2 1
2188
rZbl0skZ ZpZ0apop pZ0Zpm0Z Z0ZnM0Z0 PZBO0Z0Z Z0M0Z0Z0 0O0ZQOPO S0ARZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2190
rZbl0s0Z o0Z0Zpjp 0o0ZpZpZ Z0ZnM0Z0 0Z0OBZ0Z O0Z0Z0Z0 0O0Z0OPO Z0SQZRJ0 a
c
rZ0l0ZkZ opZbZpo0 0ZpZ0m0o Z0Z0Z0Z0 0Z0O0Z0Z ZBM0S0ZP PO0L0OPZ Z0Z0Z0J0 a
2187 8
b
2189
rZ0s0ZkZ opZbZpo0 0a0ZpZ0o mPZ0Z0Z0 PA0OBl0Z Z0Z0ZNZP 0Z0Z0OPZ S0ZQZRJ0 a
0Z0l0skZ o0s0apo0 Bo0Zpm0o Z0Z0Z0Z0 0Z0O0Z0Z Z0M0ZPO0 PO0ZQO0Z Z0SRZ0J0 a
2186 8
Isolated pawn, attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0ZkZ opZbZpo0 0lnZpa0o Z0ZnZ0Z0 0ZBO0Z0Z O0Z0ZNZ0 0OQZNOPO S0ARZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2191 8 7 6 5 4 3 2 1
2194
rZbZ0skZ opZ0apop 0ZnZ0Z0Z l0ZpZ0Z0 0Z0Z0A0Z OQM0ONZ0 0O0Z0OPO Z0S0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2196
rZ0l0skZ obZ0apop 0onZpm0Z Z0Z0Z0A0 0Z0O0Z0Z O0MBZNZ0 0O0Z0OPO S0ZQS0J0 a
c
0Zrs0ZkZ obZqapop no0Z0m0Z Z0opZ0Z0 0Z0O0A0Z Z0M0Z0OP PO0ZPOBZ Z0SQSNJ0 a
2193 8
b
2195
rZ0sbZkZ Zpl0apop pZnZ0m0Z Z0ZpZPZ0 PZ0M0Z0Z Z0M0ABZ0 0OPZQZPO S0Z0ZRZK a
rZ0lrmkZ ZbZ0apop po0Zpm0Z Z0Z0Z0A0 PZBO0Z0Z Z0M0ZNZ0 0O0ZQOPO Z0SRZ0J0 a
2192 8
Isolated pawn, attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lrZkZ opZ0Zpop 0anZ0Z0Z Z0ZNZ0Z0 0ZNo0ZbZ Z0Z0Z0O0 PO0ZPOBO Z0SQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2197 8 7 6 5 4 3 2 1
2200
0ZrZ0skZ obZ0apop 0onlpZ0Z Z0ZnZ0Z0 0Z0O0Z0Z O0MBANZ0 0O0ZQOPO Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2202
0Zrl0skZ obZnZpop 0o0Zpm0Z Z0Z0Z0A0 0aBO0Z0Z Z0M0ZNZ0 PO0ZQOPO Z0S0ZRJ0 a
c
rZbl0skZ ZpZ0apop pZ0Zpm0Z Z0Z0Z0Z0 PmBO0Z0Z Z0M0ZNZ0 0O0ZQOPO S0ARZ0J0 a
2199 8
b
2201
rZ0ZrZkZ o0lnZpop 0obZpm0Z Z0Z0Z0Z0 0Z0O0Z0A Z0OBZNZ0 PZ0Z0OPO Z0SQS0J0 a
rZ0l0skZ obZnapZp 0o0ZpmpZ Z0Z0Z0A0 0Z0O0Z0Z O0MQZ0Z0 0OBZNOPO Z0ZRZRJ0 a
2198 8
Isolated pawn, attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrl0skZ obZ0apop 0o0Zpm0Z Z0Z0M0Z0 0m0O0Z0Z Z0M0Z0Z0 PO0AQOPO ZBZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2203 8 7 6 5 4 3 2 1
2206
rZbl0skZ ZpZ0apop pZ0Zpm0Z Z0Z0Z0A0 PmBO0Z0Z Z0M0ZNZ0 0O0Z0OPO S0ZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2208
0ZrZ0skZ obZnlpop 0o0Zpm0Z Z0Z0Z0A0 0aBO0Z0Z ZQM0ZNZ0 PO0Z0OPO Z0S0S0J0 a
c
rZ0ZrZkZ ZpZ0Apop plna0Z0Z Z0ZpZ0Z0 0Z0Z0ZbZ ZNO0ZNZ0 PO0ZBOPO S0ZQS0J0 a
2205 8
b
2207
0ZrarZkZ o0ZqZpZp 0Z0Z0ZpZ ZpZpZ0Z0 0Z0ZnZ0Z ZNORAQZ0 PO0Z0OPO S0Z0Z0J0 a
rZbZ0skZ opZ0Zpop 0ZnapZ0Z Z0Z0Z0Zq 0Z0OBZ0Z Z0ZQZ0Z0 PO0ZNOPO S0A0ZRJ0 a
2204 8
Isolated pawn, attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ opZ0mpop 0lna0Z0Z Z0ZpZ0Z0 0Z0Z0Z0A ZNZBZNZ0 POPZ0OPO S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2209 8 7 6 5 4 3 2 1
2212
rZbZ0skZ opl0mpop 0Zna0Z0Z ZBZpZ0A0 0Z0M0Z0Z Z0Z0ZNZP POPZ0OPZ S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2214
rZ0l0skZ obZ0apop 0o0ZpZ0Z m0ZnZ0A0 0Z0O0Z0Z Z0MBZNZ0 PO0ZQOPO Z0ZRS0J0 a
c
rZ0Z0skZ ZbZ0Zpop po0ZpZ0Z l0Z0M0Z0 PZBO0Z0Z Z0ZQZ0Z0 0O0a0OPO S0Z0ZRJ0 a
2211 8
b
2213
rZ0ZrZkZ opZ0mpop 0lna0Z0Z Z0ZpZ0Z0 0Z0M0Z0A ZNZ0Z0Z0 POPZROPO S0ZQZ0J0 a
0s0Z0skZ Zpo0mpop 0Z0Z0ZqZ o0Z0ZbZ0 0Z0O0Z0Z OQM0A0O0 0OnZ0OBO Z0S0ZRJ0 a
2210 8
Isolated pawn, attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ Z0Z0apop po0Zpm0Z Z0Z0M0Z0 PmBO0Z0Z Z0M0A0Z0 0O0ZQOPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2215 8 7 6 5 4 3 2 1
2218
0ZrlrZkZ ZbZ0apop pZnZpm0Z ZpZ0Z0A0 0Z0O0Z0Z O0MQZNZ0 BO0Z0OPO Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2220
0l0srZkZ ZbZ0apZp ponZpmpZ Z0Z0Z0A0 0Z0O0Z0O OBMQZNZ0 0O0Z0OPZ Z0ZRS0J0 a
c
rZ0Z0lkZ ZpsbZpo0 pZ0Zpm0o Z0Z0M0Z0 Pa0O0Z0Z ZBM0SQZ0 0O0Z0OPO Z0ZRZ0J0 a
2217 8
b
2219
0Zrl0skZ ZbZ0apop pZnZpm0Z ZpZ0Z0Z0 0Z0O0Z0Z O0MQZNZ0 0OBZ0OPO S0A0S0J0 a
0Zrs0ZkZ obZ0apo0 0onlpm0o Z0Z0Z0Z0 0Z0O0Z0Z O0M0ANZ0 0OQZ0OPO ZBZRZRJ0 a
2216 8
Isolated pawn, breakthrough by d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0arZ0skZ oqZ0Zpo0 0onZpm0o Z0Z0Z0Z0 0O0O0Z0Z O0MQZNZ0 0A0Z0OPO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2221 8 7 6 5 4 3 2 1
2224
0Z0lns0j sbZ0apop po0ZpZ0A Z0Z0M0Z0 Pm0O0Z0Z ZBM0Z0L0 0O0Z0OPO Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2226
rZ0lrZkZ opZ0apZp 0ZbZpmpA Z0Z0M0Zn 0Z0O0Z0Z O0M0ZQZ0 BO0Z0OPO S0Z0ZRJ0 a
c
rZbZrZkZ Zpa0Zpop pZnl0m0Z Z0ZpZ0Z0 0Z0Z0Z0Z ZPMQONZ0 PA0ZBOPO S0ZRZ0J0 a
2223 8
b
2225
rm0s0ZkZ o0Z0lpo0 0O0Zba0o Z0ZpZ0Z0 0Z0Z0Z0Z Z0M0ONO0 PO0L0O0O Z0ZRJBZR a
rZ0Z0skZ obZ0apop 0onlpm0Z Z0Z0Z0Z0 0Z0O0Z0Z O0MQZNZ0 0OBZ0OPO S0A0S0J0 a
2222 8
Isolated pawn, breakthrough by d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0l0skZ obZrZpop 0o0ZpmnZ Z0Z0Z0A0 0Z0O0Z0Z O0MBZ0L0 0O0Z0OPO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2227 8 7 6 5 4 3 2 1
2230
rZ0s0ZkZ apZ0Zpop pZnZqm0Z Z0ZpZbZ0 0Z0Z0Z0M ZPM0O0Z0 PA0SBOPO Z0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2232
0ZrlrZkZ obZ0apop 0onZpm0Z Z0Z0Z0Z0 0Z0O0Z0Z O0MQZNZ0 0OBZ0OPO S0A0S0J0 a
c
0Zrl0skZ Z0ZbZpZp ponZpapZ Z0Z0Z0Z0 0O0OBZ0Z OQZ0ANZP 0Z0Z0OPZ Z0S0ZRJ0 a
2229 8
b
2231
rZrZ0ZkZ obZ0mpo0 0o0a0Z0o ZBZpZ0Z0 0O0Z0Z0Z O0Z0ONZ0 0Z0AKOPO Z0S0Z0ZR a
0ZrZ0skZ opZbapop 0ZnZpm0Z l0Z0Z0A0 0Z0O0Z0Z O0MBZNZ0 0O0ZQOPO Z0ZRS0J0 a
2228 8
Isolated pawn, breakthrough by d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ Z0Z0apop pZnZpm0Z ZpZ0Z0A0 0ZBO0Z0Z Z0M0ZNZ0 PO0Z0OPO Z0SQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2233 8 7 6 5 4 3 2 1
2236
0arZ0skZ ZpZnlpop 0ZbZpm0Z O0Z0Z0A0 0ZNO0Z0Z Z0MBZ0ZP 0Z0L0OPZ Z0S0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2238
rZblkZ0s Z0Znapop pZ0Zpm0Z ZpZ0Z0A0 0Z0O0Z0Z Z0MBZNZ0 PO0Z0OPO S0ZQZRJ0 a
c
0arl0skZ obZ0Zpo0 0o0Zpm0o Z0Z0ZnZ0 0Z0O0Z0A O0M0Z0ZQ BO0ZNOPO Z0SRZ0J0 a
2235 8
b
2237
rZbs0ZkZ opZ0ZpZ0 0Z0lpZpZ Z0Z0S0Zp 0Z0O0Z0O Z0L0ZNZ0 PO0Z0OPZ Z0Z0S0J0 a
rZ0Z0skZ ZbZ0apZp pZnZpo0Z Z0Z0Z0Zq 0Z0O0Z0Z O0MQZNZ0 BZ0Z0OPO S0Z0S0J0 a
2234 8
Isolated pawn, breakthrough by d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0ZkZ opZrZpo0 0ZnZpl0o Z0Z0Z0Z0 0Z0O0Z0Z Z0Z0Z0Z0 PO0ZQOPO ZBZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2239 8 7 6 5 4 3 2 1
2242
0Z0l0skZ m0Z0Zpop bo0Zpa0Z o0Z0M0Z0 0Z0O0Z0Z OQA0Z0O0 0O0Z0OBO Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2244
0Zrl0skZ obZnapo0 0o0ZpZ0o Z0Z0Z0Zn 0ZBO0Z0Z Z0M0ZNA0 PO0ZQOPO S0ZRZ0J0 a
c
rZ0snZkZ ZpZbZplp pZnZpZpZ Z0Z0Z0O0 0Z0OBZ0L Z0M0ZNZ0 PO0Z0OPZ Z0S0J0ZR a
2241 8
b
2243
rZbZ0skZ opZnlpo0 0Z0ZpZ0o Z0Z0Z0Zn 0ZBO0Z0Z Z0M0ZNZ0 PO0Z0OPO Z0SQZRJ0 a
rZbl0skZ o0Z0Zpo0 0onZpm0o Z0Z0Z0A0 0Z0O0Z0Z ZBZ0Z0M0 PO0ZQOPO S0ZRZ0J0 a
2240 8
Isolated pawn, breakthrough by d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbs0Z0Z opZ0Z0lk 0ZnZpZpo Z0Z0ZpZ0 0Z0ONL0Z Z0Z0Z0O0 PO0Z0OBO Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2245 8 7 6 5 4 3 2 1
2248
rZ0Z0skZ ZbZ0lpop ponZpZ0Z Z0Z0Z0Z0 PZBOQZ0Z Z0Z0Z0Z0 0O0Z0OPO S0ARZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2250
0ZrZ0skZ o0ZqZpap 0oNZpZpZ Z0Z0Z0Z0 0ZnO0Z0Z Z0A0ZQZ0 PO0Z0OPO Z0S0S0J0 a
c
0lrZ0skZ obZ0apop 0onZpZ0Z Z0Z0Z0Z0 0Z0O0Z0Z O0M0LNZ0 BO0Z0OPO Z0ZRS0J0 a
2247 8
b
2249
rZbs0ZkZ opZ0Zpop 0ZnZpl0Z Z0Z0Z0Z0 0ZBO0Z0Z O0L0A0Z0 0O0Z0OPO S0ZRZ0J0 a
rZ0s0ZkZ ZpSnlpop 0Z0ZpZ0Z oBZ0ZnZ0 Pa0O0AQZ Z0Z0ZNZ0 0O0Z0OPO S0Z0Z0J0 a
2246 8
Isolated pawn, breakthrough by d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0srZkZ ZbZ0Z0op po0lpZnZ Z0Z0ZpZ0 PZ0O0Z0a Z0ABM0ZQ 0O0Z0OPO S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2251 8 7 6 5 4 3 2 1
2254
rZbl0skZ o0Z0apop 0onZpm0Z Z0Z0Z0Z0 0ZBO0Z0Z O0M0A0Z0 0O0ZNOPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2256
0ZrZrZkZ ZbZ0ZpZp ponZpapA Z0Z0Z0Zq 0Z0O0Z0Z OBZ0LNZ0 0O0Z0OPO Z0ZRS0J0 a
c
rm0s0ZkZ ZbZ0lpZp pZ0Zpo0A apZ0Z0Z0 0Z0O0Z0Z O0ZQZNZ0 BO0Z0OPO S0Z0ZRJ0 a
2253 8
b
2255
0ZrZ0skZ obZ0apop 0onlpZ0Z Z0Z0Z0Z0 0ZBO0Z0Z OPS0ZNZ0 0A0Z0OPO Z0ZQS0J0 a
rZbZ0skZ o0Z0Zpap 0o0ZpZpZ l0Z0AnZ0 0Z0O0Z0Z ZBM0Z0Z0 PO0L0OPO Z0ZRS0J0 a
2252 8
Isolated pawn, breakthrough by d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrs0ZkZ obl0ZpZ0 0o0apo0o Z0Z0Z0Z0 0Z0O0Z0Z ZBZ0ZNO0 PO0ZQO0O ZRZ0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2257 8 7 6 5 4 3 2 1
2260
rmrZ0ZkZ opZ0lpop 0ZbZpm0Z a0Z0Z0Z0 0Z0O0Z0Z O0M0ZNZ0 BOQA0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2262
0ZrsbZkZ opZqapZ0 0ZnZpZpo Z0Z0Z0Z0 0O0O0ZnZ OBMQA0M0 0Z0Z0OPO Z0S0ZRJ0 a
c
rZ0s0ZkZ opZbapo0 0lnZpZ0o Z0Z0Z0Zn 0ZBO0Z0A Z0M0ZNZ0 PO0ZQOPO Z0SRZ0J0 a
2259 8
b
2261
rm0Z0skZ opZ0lpo0 0Z0Zpm0o a0Z0Z0Z0 0ZBO0Z0Z O0M0ZQZ0 0O0A0OPO S0ZRZ0J0 a
0ZrZ0skZ o0l0apop bo0Zpm0Z Z0Z0Z0A0 0ZnO0Z0Z O0M0ZNZ0 0OBZ0OPO Z0LRS0J0 a
2258 8
Isolated pawn, breakthrough by d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0lrZkZ Zbs0apZp po0ZpmpA Z0Z0Z0Z0 0Z0ONZ0O OBZ0ZQZ0 0O0Z0OPZ Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2263 8 7 6 5 4 3 2 1
2266
rZ0lrakZ ZpZ0Zpop pZnZ0Z0Z Z0ZpZ0Zb 0O0Z0Z0M Z0O0A0O0 PZQZ0OBO S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2268
0Z0srZkZ apZ0Zpop pZnl0m0Z Z0ZpZ0Z0 0Z0Z0ZbZ OPM0ONZ0 0A0SBOPO Z0ZQS0J0 a
c
rZbZ0skZ Z0Z0mpop pZ0ZpZ0Z lpZ0M0Z0 PZ0O0Z0Z ZBZ0Z0Z0 0O0Z0OPO S0ZQS0J0 a
2265 8
b
2267
rZ0l0skZ ZbZ0apop pZ0Zpm0Z mpZ0Z0A0 0Z0O0Z0Z ZBM0ZNZ0 PO0ZQOPO Z0ZRS0J0 a
rZbZ0skZ o0Z0apZp 0o0lpmpZ Z0Z0Z0A0 0Z0O0Z0Z O0ZQZNZ0 BO0Z0OPO S0Z0S0J0 a
2264 8
Isolated pawn, breakthrough by d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rmbl0skZ opZ0Zpop 0Z0Z0m0Z Z0apZ0Z0 0O0Z0Z0Z O0M0O0M0 0Z0Z0OPO S0AQJBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2269 8 7 6 5 4 3 2 1
2272
0ZrZrZkZ o0l0Z0op 0o0ZpZ0Z Z0ZnZpZ0 0ZPO0Z0A Z0Z0ZQZ0 PZ0Z0OPO Z0S0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2274
0ZrZrZkZ obZ0Zpop 0oqZpmnZ Z0Z0Z0Z0 0ZPO0M0Z O0Z0Z0Z0 0AQZ0OPO Z0S0SBJ0 a
c
0Zrs0ZkZ ZbZnlpap pZ0Z0mpZ Z0opZ0Z0 0Z0Z0Z0Z ZPZ0ONZ0 PA0ZNOPO ZQSRZBJ0 a
2271 8
b
2273
rZ0ZrZkZ ZbZnapo0 pl0Z0m0o Z0opZ0Z0 0Z0Z0Z0A Z0M0ONZ0 POBZQOPO Z0SRZ0J0 a
0ZrsbZkZ opZ0lpop 0Z0ZpZ0Z Z0ZnM0Z0 0Z0O0Z0Z ZBOQZ0Z0 PZ0Z0OPO Z0S0S0J0 a
2270 8
Hanging pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ obZ0apop 0onZpm0Z Z0Z0Z0Z0 0ZPO0Z0Z Z0MBZNZ0 PA0ZQOPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2275 8 7 6 5 4 3 2 1
2278
0srZ0ZkZ o0onZpop 0Z0ZbZ0Z S0ZpZ0Z0 0Z0Z0Z0Z ZNZ0O0O0 PO0Z0OBO S0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2280
rZrZ0ZkZ obZnZpop 0o0Zpm0Z Z0Z0Z0Z0 0Z0O0Z0Z l0OBZNA0 PZ0Z0OPO Z0SQS0J0 a
c
qZrZrZkZ o0ZnZpop Qo0Zpm0Z Z0Z0Z0Z0 0ZPO0Z0A Z0Z0ZNZ0 PZ0Z0OPO Z0S0S0J0 a
2277 8
b
2279
rZbl0skZ o0Z0Zpop 0ZpZ0m0Z Z0ZpZ0Z0 0Z0Z0Z0Z Z0MBO0O0 PO0Z0OPZ S0ZQZRJ0 a
0ZrZrZkZ obZ0lpap 0onZpmpZ Z0Z0Z0Z0 0ZPO0Z0Z Z0Z0MNZ0 PABZQOPO Z0SRZ0J0 a
2276 8
Hanging pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ Z0ZnZpop 0oqZpm0Z Z0Z0Z0A0 pZ0O0Z0Z Z0OQZNZ0 PZ0Z0OPO Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2281 8 7 6 5 4 3 2 1
2284
0ZrZrZkZ obZnZpo0 0oqZpm0o Z0Z0Z0Z0 0ZPO0Z0A Z0Z0ZNZ0 PZ0Z0OPO Z0SQSBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2286
rZbZ0skZ o0ZnZpop 0o0Zpm0Z Z0Z0Z0Zq 0ZPO0Z0Z Z0Z0ZNZ0 PZ0ZBOPO S0AQS0J0 a
c
0Zrl0skZ obZ0Zpop 0o0apm0Z m0Z0Z0Z0 0ZPO0Z0Z O0ZBZNZ0 0A0M0OPO Z0SQS0J0 a
2283 8
b
2285
0ZqsrZkZ obZnZpop 0o0Zpm0Z Z0Z0Z0Z0 0ZPO0Z0A Z0Z0ZNZ0 PZ0Z0OPO Z0SQSBJ0 a
rZ0Z0skZ obl0opa0 0o0Z0Zpo Z0Z0Z0Z0 nZPO0Z0Z Z0Z0Z0O0 PZ0ZQO0O ZNSRABJ0 a
2282 8
Hanging pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrl0skZ opZbZpZp 0Z0ZpapZ Z0Z0Z0Z0 0Z0O0ONZ OBOQZ0Z0 0Z0Z0ZPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2287 8 7 6 5 4 3 2 1
2290
0ZrZ0skZ obl0apop 0o0Zpm0Z Z0Z0Z0Z0 PZPOnZ0Z MQZ0ZNO0 0A0Z0OBO Z0S0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2292
rZ0ZrZkZ ZbZqZpo0 po0ZpZ0o Z0Z0Z0Zn 0ZPO0Z0A Z0Z0ZNZ0 PZ0ZQOPO Z0SRZ0J0 a
c
0ZrZrZkZ obZnZpop 0oqZpm0Z Z0Z0Z0A0 0ZPO0Z0Z Z0ZBZNZ0 PZ0ZQOPO Z0S0S0J0 a
2289 8
b
2291
0ZrZ0skZ oblnZpop 0o0Zpm0Z Z0Z0Z0Z0 0ZPO0Z0Z A0ZBZNZ0 PZ0ZQOPO S0ZRZ0J0 a
rm0l0skZ o0Z0apo0 0o0ZpZ0o Z0ZbZ0Z0 0Z0O0Z0Z Z0OBZNA0 PZ0Z0OPO S0ZQZRJ0 a
2288 8
Hanging pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0s0Z ZblnZpjp po0ZpmpZ Z0Z0M0A0 0ZPO0O0Z Z0Z0Z0Z0 PZBZ0ZPO Z0SRL0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2293 8 7 6 5 4 3 2 1
2296
0ZrZ0s0j Z0Zqapop pobZpm0Z m0Z0Z0Z0 0ZPO0Z0Z O0ZQM0Z0 0A0MBOPO Z0S0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2298
rZ0s0ZkZ obl0apZp 0onZpmpZ Z0Z0Z0Z0 0ZPO0Z0Z O0MBZNZ0 0A0Z0OPO S0ZQS0J0 a
c
0ZrZrZkZ oblnZpo0 0o0Zpm0o Z0Z0Z0Z0 0ZPO0Z0Z Z0ZBZNZ0 PZ0AQOPO Z0S0S0J0 a
2295 8
b
2297
rZ0Z0skZ oblnZpop 0o0Zpm0Z Z0Z0Z0A0 0ZPO0Z0Z Z0ZBZNZ0 PZ0ZQOPO S0Z0ZRJ0 a
rZ0Z0skZ oblnZpop 0o0Zpm0Z Z0Z0Z0A0 0ZPO0Z0Z Z0ZBZNZ0 PZ0ZQOPO S0Z0ZRJ0 a
2294 8
Hanging pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrs0ZkZ Z0lnZpap po0ZpZpZ Z0Z0Z0Z0 PZPO0Z0Z ZQZ0ZBZ0 0A0Z0OPO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2299 8 7 6 5 4 3 2 1
2302
0ZrZ0skZ obZnZpop 0oqZpZ0Z Z0Z0Z0Zn 0ZPO0Z0A Z0ZBZNZ0 PZ0Z0OPO Z0SQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2304
rZ0Z0skZ o0ZnZpop 0o0ZpZ0Z Z0Z0Z0M0 PZPO0Z0Z Z0Z0Z0Z0 0Z0Z0OPO S0Z0ZRJ0 a
c
rZ0Z0skZ obZ0apop 0onZpZ0Z Z0Z0Z0Zq 0ZPO0Z0Z Z0ZBZNZ0 PA0ZQOPO S0Z0ZRJ0 a
2301 8
b
2303
0ZrZrmkZ obZ0Zpop 0oqZpm0Z Z0Z0Z0Z0 0ZPO0Z0Z Z0ZBZNA0 PZ0Z0OPO Z0SQS0J0 a
0ZrZrZkZ o0lnZpop 0o0Zpm0Z Z0ZbZ0Z0 0Z0O0Z0Z O0OBZNZ0 0Z0AQOPO Z0S0S0J0 a
2300 8
Hanging pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrlrZkZ obZ0apop 0o0Zpm0Z m0Z0Z0Z0 0ZPO0Z0Z O0MBZNZ0 0A0Z0OPO Z0SQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2305 8 7 6 5 4 3 2 1
2308
0Zrl0s0Z obZ0Zpjp 0onZpZpZ Z0Z0Z0Z0 0ZPOBZ0Z O0Z0ZNZ0 0ZQZ0OPO S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2310
0Zrl0skZ obZnapop 0Z0Z0m0Z Z0opZ0Z0 0Z0Z0Z0Z ZPMBONZ0 PAQZ0OPO Z0ZRZRJ0 a
c
0Z0srakZ oblnZpop 0Z0Z0m0Z Z0opZ0Z0 0Z0Z0Z0Z ZPM0ONOB PA0ZQO0O Z0SRZ0J0 a
2307 8
b
2309
rZ0l0skZ obZ0apo0 0Z0Z0m0o Z0opZ0Z0 0Z0Z0Z0Z Z0MBONO0 PO0ZQOPZ Z0S0ZRJ0 a
0ZrZrZkZ obZ0lpop nZ0Z0m0Z a0opM0Z0 0Z0Z0Z0Z OPZ0O0O0 0A0M0OBO S0ZQZRJ0 a
2306 8
Hanging pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0mkZ obZ0lpop 0Z0a0m0Z Z0opZ0Z0 QZ0Z0A0Z Z0ZNZNO0 PO0ZPOBO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2311 8 7 6 5 4 3 2 1
2314
rZ0Z0skZ obZnlpo0 0Z0Z0Z0o Z0opZ0Z0 0Z0Z0Z0Z O0S0ONZ0 0OQZBOPO Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2316
0s0Z0skZ o0Z0Zpop 0Z0ZbZ0Z m0opZ0Z0 0Z0Z0Z0Z ZPZ0ONZ0 PZ0ZBOPO S0Z0ZRJ0 a
c
rZ0ZrZkZ o0Znapop 0lbZ0m0Z ZBopZ0Z0 0Z0Z0Z0Z ZPM0ONZ0 PA0ZQOPO Z0SRZ0J0 a
2313 8
b
2315
rZ0s0ZkZ obZ0ZpZp 0ZnZ0ZpZ l0opZ0Z0 NZ0ZnZ0Z ZPZ0ONZ0 PL0ZBOPO Z0SRZ0J0 a
0s0s0ZkZ obZnZpo0 0l0Z0Z0o Z0opZ0Z0 0Z0Z0Z0Z ZPL0ONZ0 PZRZBOPO Z0ZRZ0J0 a
2312 8
Hanging pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ ZbZ0Zpop 0Z0aqZ0Z o0opZ0Z0 0Z0ZnZ0Z ZPZNO0O0 PA0Z0OBO Z0SQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2317 8 7 6 5 4 3 2 1
2320
0Z0srZkZ obZnlpop 0Z0a0m0Z Z0opZ0Z0 0Z0Z0Z0Z ZPLBONZ0 PA0M0OPO Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2322
0ZrZ0skZ o0Z0Zpop 0Z0Zbm0Z l0opZ0Z0 QZ0Z0Z0Z ZPM0O0Z0 PZ0ZBOPO Z0S0ZRJ0 a
c
0ZrZ0lkZ s0ZnZ0o0 pZ0ZpZ0o Z0opZ0Z0 0Z0Z0Z0Z L0Z0O0Z0 PO0ZBOPO Z0S0ZRJ0 a
2319 8
b
2321
rm0s0ZkZ obZ0lpap 0Z0Z0mpZ Z0opZ0Z0 0Z0Z0Z0Z ZPM0ONZ0 PA0LBOPO Z0SRZ0J0 a
0Zrs0ZkZ obZ0lpZp nZ0Z0ZpZ Z0opZ0Z0 NZ0ZnZ0Z ZPZ0O0O0 PS0Z0OBO Z0SQM0J0 a
2318 8
Hanging pawns
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0Z0skZ obZ0lpop 0Z0Z0m0Z Z0opZ0Z0 NZ0Z0Z0Z O0ZBOPZ0 0O0Z0ZPO ZRAQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2323 8 7 6 5 4 3 2 1
2326
0Z0l0skZ s0ono0ap po0oRmpZ Z0Z0Z0Z0 0Z0O0Z0Z Z0M0ZBZ0 POPZ0OPO S0AQZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2328
0Z0s0Z0Z o0Z0Zrjp 0onlbo0Z Z0Z0m0o0 0Z0ZPZ0Z Z0LPZ0O0 PZRZNMBO Z0ZRZ0J0 a
c
rZbZnZkZ opZ0l0op 0ZpZps0Z Z0Z0MpZ0 0Z0O0Z0Z Z0OBZ0ZQ PO0Z0OPO S0Z0ZRJ0 a
2325 8
b
2327
rZ0ZrZkZ opo0Zpop 0Znm0Z0Z Z0Z0ZbZq 0Z0O0Z0Z Z0O0ZNO0 PS0ZPZBO Z0AQZRJ0 a
rZ0l0skZ Z0Z0a0op bZ0o0m0Z opo0oPZ0 0Z0Z0Z0Z OPOBLNZP 0Z0M0OPZ Z0S0S0J0 a
2324 8
Backward pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ obo0a0op 0o0o0Z0Z Z0ZPZpZ0 0m0Z0Z0Z Z0Z0Z0O0 POQZPOBO S0A0MRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2329 8 7 6 5 4 3 2 1
2332
0Zrs0ZkZ Z0m0lpZp po0o0ZpZ Z0Z0o0Z0 0OPZ0Z0Z O0ZQO0Z0 0Z0M0OPO Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2334
0ZrZ0skZ o0Z0l0op 0mpZ0o0Z Z0MpobZ0 0Z0O0Z0Z Z0Z0O0A0 PO0L0OPO Z0S0ZRJ0 a
c
rZ0s0ZkZ Z0Z0Zpop 0ZpZ0m0Z Z0ZpZ0Z0 0l0Z0ZbZ ZPM0ONZ0 PZ0Z0OPO Z0SQZRJ0 a
2331 8
b
2333
rs0Z0ZkZ o0Z0opap 0o0Z0ZpZ ZRZ0Z0Z0 0Z0Z0Z0Z Z0ZPA0O0 0O0ZPO0O S0Z0Z0J0 a
0s0Z0skZ Z0l0a0op pZ0o0o0Z Z0mRo0ZP 0ZNZ0ZQZ ZPZ0Z0O0 PAPZ0O0Z ZKZ0Z0ZR a
2330 8
Backward pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrskZ opm0o0ap 0ZpZ0Zpm Z0OpZ0Z0 0Z0O0O0Z Z0M0ANOq PO0ZQZ0O Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2335 8 7 6 5 4 3 2 1
2338
rZrZ0ZkZ Z0Z0Zpop 0mpZ0m0Z o0ZpZ0Z0 0Z0OpZ0Z lPM0O0OP PZRZBOQZ Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2340
0Zrs0Z0Z Z0Z0akm0 pZ0opo0o Z0o0Z0o0 0ZPZPO0Z ZPMRZ0OP PA0Z0ZKZ Z0Z0S0Z0 a
c
0Zrs0ZkZ oqZ0opZp 0o0Z0apZ Z0Z0Z0Z0 0Z0O0O0Z Z0O0ZRZ0 PA0Z0ZPO S0Z0L0ZK a
2337 8
b
2339
0Zrl0skZ Z0Z0opap pZ0o0o0Z ZpZNZPZ0 0O0L0Z0Z Z0Z0Z0Z0 PZPZ0OPO S0Z0ZRJ0 a
rZ0lrZ0Z o0ZnZpjp 0ZpZ0ZpZ Z0ZpZ0Z0 0Z0Z0Z0Z ZPZ0Z0O0 PZ0ZPOBO S0ZQZRJ0 a
2336 8
Backward pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZqZ0skZ o0snZpop 0o0Zpm0Z Z0Z0Z0Z0 QZ0O0Z0Z Z0O0ZNZ0 PZ0A0OPO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2341 8 7 6 5 4 3 2 1
2344
0ZrlkZ0s o0Z0mpop 0ZpZba0Z Z0ZpZ0Z0 0Z0Z0Z0Z ZPM0Z0O0 PA0LPOBO S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2346
0srZnZ0Z ZpZ0jpZp 0m0obZpZ oNo0Z0Z0 0ZPZ0Z0Z ZPZ0Z0O0 PM0ZPOBO Z0SRZ0J0 a
c
0Z0ZrZkZ o0Zbspo0 0o0l0m0o Z0opZ0Z0 PZ0O0M0Z Z0O0OPZP 0Z0L0JPZ S0Z0SBZ0 a
2343 8
b
2345
rZ0lkZ0s ZbZ0apop pZ0o0m0Z Zpm0oPA0 0Z0ZPZ0Z ZBM0Z0M0 POPZ0ZPO S0ZQJ0ZR a
0Zrl0skZ obZ0ZpZp 0onZpapZ Z0Z0Z0ZP 0Z0O0Z0Z Z0OBZNZ0 PZ0L0OPZ S0A0S0J0 a
2342 8
Backward pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ opl0mpap 0Z0obZpZ Z0Z0o0Z0 0Z0ZPZ0Z Z0O0A0O0 PO0LNOBO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2347 8 7 6 5 4 3 2 1
2350
0s0ZrZkZ ZpoqZpo0 pZ0o0Zno Z0ZPZ0Z0 0Z0ZPZ0Z L0Z0ZBZ0 PO0Z0OPO Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2352
0ZrsbZkZ Z0l0apop 0Z0ZpZ0Z Z0ZpO0Z0 0o0AnZ0Z ZPZQZ0OP 0ZPZ0OBZ Z0SNS0J0 a
c
rZbZ0Z0s opZ0j0op 0ZnZpm0Z Z0ZpZ0Z0 0Z0O0M0Z Z0Z0ZNZ0 PO0J0OPO S0Z0ZBZR a
2349 8
b
2351
rZrZ0ZkZ Z0o0lpZp 0o0o0ZpZ oBZPZ0Zn 0O0ZPZ0Z O0Z0ZPZ0 0Z0L0ZPO Z0SRZ0J0 a
rZ0Z0skZ opZbZ0op 0lnZpm0Z Z0ZpZ0Z0 0Z0O0M0Z Z0ZBZNZ0 PO0L0OPO S0Z0ZRJ0 a
2348 8
Backward pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrs0ZkZ o0l0ZpZ0 0Zpm0ZpZ Z0ZpabZp NZ0Z0Z0Z ZPZ0OPO0 PZ0A0ZBO Z0SQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2353 8 7 6 5 4 3 2 1
2356
0lrZrZkZ o0Znopap 0ZpZ0ZpZ Z0ZpZbZ0 NZ0O0Z0Z ZPA0Z0O0 PZ0LPOBO Z0S0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2358
0ZrlrZkZ o0ZnZpZp bZpZ0ZpA Z0Zpa0Z0 0Z0Z0Z0O Z0M0Z0O0 PO0LPOBZ Z0SRZ0J0 a
c
rZ0ZrZkZ o0o0apop 0Z0Z0Z0Z Z0ZpZ0Z0 0Z0O0Z0Z Z0Z0Z0Z0 PO0Z0OPO S0ARZ0J0 a
2355 8
b
2357
rZbl0skZ o0Z0Z0ap 0mpZpopZ Z0ZpZ0Z0 0Z0O0O0Z Z0M0Z0O0 PO0ZPABO S0ZQZRJ0 a
rZblrZ0Z o0Z0ZpZk 0mpZ0Zpo Z0Apa0Z0 0Z0Z0Z0Z Z0M0Z0O0 PO0LPOBO S0ZRZ0J0 a
2354 8
Backward pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ o0Z0Zpop 0ZpZpm0Z l0ZpZbZ0 0a0O0A0Z ZQM0ONZ0 PO0Z0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2359 8 7 6 5 4 3 2 1
2362
rZ0Z0Z0s o0Znj0op 0ZpZpo0Z Z0ZpZbZ0 NZ0O0Z0Z Z0Z0ONZ0 PO0Z0OPO S0Z0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2364
0Zrl0skZ ZpZnapop pm0obZ0Z Z0ZNo0Z0 0ZPZPZ0Z Z0Z0Z0Z0 PO0M0OPO S0AQSBJ0 a
c
rZ0Z0skZ Zpl0Zpa0 pZnobmpo Z0Z0o0Z0 0Z0ZPZ0A Z0OBM0Z0 PO0MQOPO S0ZRZ0J0 a
2361 8
b
2363
rZ0Z0ZkZ o0Z0spap bZpZ0ZpZ Z0Zpm0Z0 NZ0A0Z0Z Z0Z0Z0O0 PO0ZPOBO S0ZRZ0J0 a
0Z0s0skZ ZpZqZ0o0 pZ0obZno O0ZNonZ0 0OPZ0Z0Z Z0Z0Z0Z0 0ZNLBOPO Z0S0ZRJ0 a
2360 8
Backward pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZrZ0ZkZ Z0Zbapop 0l0o0m0Z mpZ0o0A0 0Z0ZPZ0Z M0OQZ0Z0 BO0M0OPO S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2365 8 7 6 5 4 3 2 1
2368
0Z0j0Z0Z s0o0spo0 0o0o0m0o o0ZPoBZ0 0Z0ZPZ0O Z0SPZ0O0 PO0Z0O0Z Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2370
rZbZrakZ opZ0o0Zp 0lpZ0mpZ Z0ZpZ0Z0 0Z0O0O0Z L0O0ZNZ0 PO0Z0MPO S0A0S0J0 a
c
rZ0Z0ZkZ opZbm0a0 0l0Zps0o Z0ZpZ0oB 0ZpO0Z0Z Z0O0Z0O0 POQM0OPM S0Z0ZRJ0 a
2367 8
b
2369
rs0Z0ZkZ Z0o0lpop 0o0o0m0a ZPZPo0Z0 0O0ZPZ0Z ZNZQZ0O0 0Z0Z0OBO S0Z0ZRJ0 a
0ZkZrs0Z opobl0Zp 0Z0ZpZpZ m0OpZ0M0 0Z0O0O0O Z0OBZ0L0 PZ0Z0ZPZ Z0Z0SRJ0 a
2366 8
Backward pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0Z0Z oplbZno0 0ZnZps0o Z0ZpM0Z0 0ZpO0Z0O O0O0ZPZB 0ZPZ0SPZ ZRA0L0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2371 8 7 6 5 4 3 2 1
2374
rZ0Z0skZ o0Zbm0o0 0o0ZpZ0o Z0opZ0Z0 PZ0O0l0Z Z0OBZNZ0 0ZPZ0OPO S0ZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2376
0Z0ZrZ0s Zpo0lpj0 nZ0o0mpZ o0ZPZ0Z0 0ZPZPL0Z OPM0S0Zb 0Z0MBZ0O Z0Z0Z0SK a
c
0Z0ZrZkZ opZ0Z0ap 0ZqZ0opZ Z0o0Z0Zn 0ZPZrO0Z Z0ZNO0O0 PZQZ0J0O S0A0S0Z0 a
2373 8
b
2375
0s0Z0skZ Z0oqmpa0 0o0o0ZpZ oPZPo0Zp 0Z0Z0Z0Z O0ZPZ0Ob 0Z0MPO0O ZRAQS0JB a
0ZnsrZkZ ZpZbZpop 0ZpZnZ0Z o0ZpZ0Z0 PZ0O0O0Z ZPZBO0M0 0Z0MRZPO Z0S0Z0ZK a
2372 8
Backward pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0s0j opaqm0op 0Z0Zno0Z ZPo0o0Z0 0ZPZNZ0M O0ZPZ0O0 0A0ZQO0O Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2377 8 7 6 5 4 3 2 1
2380
rZ0Z0skZ o0Z0ZpZp 0Z0Z0lpZ Z0mPZ0Zn 0SNZ0Z0Z Z0Z0Z0ZP 0Z0Z0OPZ ZBZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2382
rZ0lrZkZ ZpZnapo0 0Z0Z0ZpZ o0ZPo0Z0 PmBZ0A0Z Z0M0Z0Z0 0O0ZQOPO Z0ZRS0J0 a
c
rZ0ZrakZ ZnlbZpon 0ZBo0Z0o Z0oPoNZ0 0O0ZPZ0Z Z0Z0ZNZP 0Z0A0OPZ S0ZQS0J0 a
2379 8
b
2381
rZqZ0skZ opZ0Zpo0 0ZpZpa0o Z0ZPZbZ0 0ZPZ0Z0Z ZQZ0Z0O0 PO0Z0OBO S0A0ZRJ0 a
0Z0Z0akZ oNZ0ZpZ0 0Z0Z0Z0o ZpOns0oP 0Z0Z0Z0Z O0Z0Z0OB rZ0Z0O0Z Z0SRZ0J0 a
2378 8
Passed pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0sbZrmkZ Z0l0Zpo0 0Zpo0a0o Z0Z0o0Z0 NOPZPZ0Z Z0ABZ0Z0 0ZQZ0OPO Z0Z0SRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2383 8 7 6 5 4 3 2 1
2386
rZ0Z0skZ oqZ0Zpap no0Z0ZpZ Z0oPZ0A0 QZ0Z0Z0Z Z0Z0ZNZ0 PZ0Z0OPO ZRZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2388
0ZrsnZkZ obZnZpo0 0o0ZpZ0o Z0Z0Z0Z0 0ZPONA0Z Z0Z0ZPZ0 PZ0Z0ZPO Z0SRZBJ0 a
c
0Z0srZkZ obZ0ZpZp 0onZpapZ Z0Z0Z0Zq 0ZPO0Z0Z O0ZQZNZP 0ZBZ0OPZ Z0ARS0J0 a
2385 8
b
2387
0Z0l0Zrj ZpZ0ZpZp 0mpA0ZpL Z0Z0OpZ0 0Z0Z0O0Z Z0ZRZ0Z0 0Z0Z0OKO Z0Z0Z0Z0 a
rZ0ZrZkZ ZbZnZpop pZ0Z0Z0Z A0Z0Z0Z0 0ZPM0Z0Z Z0Z0Z0Z0 0Z0Z0OPO S0S0Z0J0 a
2384 8
Passed pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0arZkZ opZblnZp 0Z0o0opZ O0ZPZ0Zn 0O0APO0Z ZQM0ZNZP 0Z0Z0ZBZ Z0S0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2389 8 7 6 5 4 3 2 1
2392
0ZrZ0skZ o0Z0Zpop 0o0Z0Z0Z m0ZPZQZ0 0Z0Z0Z0Z Z0Z0ZNZ0 PZqZ0OPO Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2394
rZ0Z0skZ opZ0opZp 0mbo0ZpZ Z0Z0Z0Z0 0OPZPZ0Z Z0M0ZPZ0 PZ0ZBZPO Z0S0ZRJ0 a
c
rZ0l0skZ opZnZpap 0Z0Z0mpZ Z0oPo0Z0 0ZBZ0Z0Z Z0M0OQZP PO0Z0OPZ S0ARZ0J0 a
2391 8
b
2393
rZ0Z0Z0j o0ArZpop 0onZpl0Z mNZ0Z0Z0 0Z0OPZ0Z Z0Z0Z0L0 0Z0Z0OPO ZRZRZ0J0 a
rmbZkZrZ opZ0mpZQ 0Z0Zpl0Z Z0ZpZ0Z0 0Z0Z0A0Z O0oBZ0Z0 0ZPZNOPO S0Z0J0ZR a
2390 8
Passed pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ l0Z0ZpZp pZ0o0ZpZ Z0mPZ0Z0 0ZRZPO0Z ZpZBZ0ZP 0O0L0ZPJ Z0S0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2395 8 7 6 5 4 3 2 1
2398
rZ0ZkZ0s obZ0Zpo0 0ZpZqmno Zpo0O0Z0 QZNZ0Z0A Z0OBZPZ0 PZ0Z0ZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2400
0Z0s0skZ opZ0Zpop 0Z0Z0a0Z Z0ZPZ0Z0 0Z0Z0A0Z Z0Z0Z0Z0 Pl0Z0OPO Z0SQZRJ0 a
c
qZ0Z0skZ obZ0apop 0o0ZpZ0Z Z0ZPZ0Z0 PZ0ZPZ0Z Z0ZQZNZ0 0Z0Z0OPO A0ZRZ0J0 a
2397 8
b
2399
0Zrs0Z0Z Z0Z0jpo0 0Z0obm0o opl0o0Z0 0Z0ZPO0Z O0M0S0OP 0OPL0ZBJ Z0ZRZ0Z0 a
0Z0Z0mkZ opZ0Zpop 0ZpZrm0Z Z0Z0Z0Zq 0ZPO0Z0Z Z0Z0ZNO0 PAQZ0OPZ Z0ZRZ0J0 a
2396 8
Passed pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblrZkZ ZpZ0Zpap pZ0Z0mpZ Z0mPZ0Z0 PZNZ0Z0Z Z0M0Z0Z0 0O0ZBZPO S0AQZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2401 8 7 6 5 4 3 2 1
2404
0ZrZ0skZ obZ0ZpZp 0onZplpZ Z0Z0Z0Z0 0ZPO0Z0Z O0ZQZNZ0 BZ0Z0OPO Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2406
rZba0skZ opZ0Zpo0 0Z0Z0Z0o Z0ZPo0Z0 0Z0ZNZ0Z Z0Z0Z0L0 qO0ZBOPO Z0ZRZRJ0 a
c
0Z0srZkZ o0Z0Zpop 0onZqZ0Z Z0a0O0Z0 0Z0oQO0Z ZPZ0ZNO0 PZ0A0ZKO S0Z0S0Z0 a
2403 8
b
2405
rZbl0skZ o0Z0apop 0o0Z0Z0Z Z0ZPZ0Z0 0m0Z0Z0Z Z0Z0ZNO0 PZ0Z0OBO S0AQZRJ0 a
0ZrZ0skZ Z0Z0Zpo0 pa0Z0Z0o ZpZ0OqZ0 0L0o0Z0Z Z0Z0Z0AP PO0Z0OPZ Z0S0S0J0 a
2402 8
Passed pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0skZ obZ0lpo0 0Z0Znm0o Z0o0Z0Z0 0Z0oPO0Z O0Z0Z0ON 0OQZ0ZBO Z0ARS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2407 8 7 6 5 4 3 2 1
2410
rZ0s0ZkZ Z0Z0Zpap 0Z0l0ZpZ Z0Z0Z0Z0 PoRo0Z0Z ZPZ0ZNZP 0Z0ZQOPZ Z0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2412
rZ0l0s0Z Z0Z0Z0jp 0o0Z0ZpZ oBmpZ0Z0 0Z0Z0ZPZ ZPZ0ZPZ0 PZ0Z0Z0O Z0SQZRZK a
c
rZ0Z0skZ opZ0Z0op 0ZnlpZ0Z Z0a0Z0Z0 0ZPoBZ0Z Z0Z0Z0O0 PO0Z0O0O S0AQS0J0 a
2409 8
b
2411
0Zrl0skZ ZbZ0Zpop 0Z0Z0a0Z o0ZpZ0Z0 0Z0Z0A0Z ZNZ0Z0Z0 PO0L0OPO S0Z0S0J0 a
rZ0l0skZ ZpZ0Zpo0 0ZnZ0Z0o Z0Z0mbZ0 paPoNA0O M0Z0Z0O0 PO0Z0OBZ S0ZQZRJ0 a
2408 8
Passed pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ opZ0Z0ap 0Z0opZpZ Z0m0ZnZ0 0ZPZ0Z0Z Z0M0ZPZ0 PO0ZBZPO S0A0LRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2413 8 7 6 5 4 3 2 1
2416
0ZrsbZkZ o0Z0lpZp QonZpapZ Z0Z0Z0Z0 0ZPOBA0Z O0Z0ZNZP 0Z0Z0OPZ ZRZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2418
0Z0a0Zrj Z0ZPZ0op 0Z0Z0Z0Z o0L0Z0Z0 0Z0ZpZ0Z Z0Z0Z0Z0 PO0o0oPO Z0ZRlRZK a
c
rZ0ZrZkZ opZ0Zpap 0Z0Z0lpZ m0ZPZ0Z0 0L0Z0A0Z Z0ZBZPZ0 0Z0Z0ZPO Z0SRZ0J0 a
2415 8
b
2417
rmblka0Z opZ0opo0 0ZpZ0Z0Z Z0Z0A0Z0 0Z0O0Z0Z Z0Z0Z0o0 POPZ0OPs S0ZQJBMR a
0s0Z0ZkZ oBa0Zpop 0Z0Z0l0Z OPZ0Z0Z0 0A0O0Z0Z Z0Z0L0O0 0ZrZ0O0O Z0ZRZ0J0 a
2414 8
Passed pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ o0ZnZpop 0o0Z0Z0Z l0O0Z0A0 0ZQZ0Z0Z Z0Z0ONZ0 PZ0Z0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2419 8 7 6 5 4 3 2 1
2422
rmrZ0Z0Z Z0Zpl0jp bZ0ZpopZ Z0Z0Z0Z0 0OBZ0M0Z Z0L0O0Z0 0Z0Z0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2424
rZ0Z0skZ opZ0Zpo0 0lpO0mpZ Z0Z0Z0Z0 PmBZ0ZPZ Z0M0Z0ZP 0O0ZQO0Z Z0ZRS0J0 a
c
rZ0Z0skZ o0o0ZpZp 0Z0O0Z0Z Z0mPZ0o0 0Z0Z0A0Z Z0Z0Z0O0 PZ0Z0O0O ZRZ0ZBJ0 a
2421 8
b
2423
0s0Z0skZ Z0l0apop 0Z0Z0m0Z O0m0o0Z0 RZBZpZ0Z ZNZ0A0Z0 0Z0ZQOPO S0Z0Z0J0 a
0Z0Z0akZ Z0Z0Z0op 0Z0ZqZ0Z ZPZ0ZpZ0 PZ0Zpm0Z Z0Z0Z0Z0 NZQZ0ZPO Z0Z0Z0AK a
2420 8
Passed pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0ZkZ o0Z0lpo0 0o0Z0m0o Z0O0Z0Z0 PZQZpZ0Z A0O0O0ZP 0Z0Z0OPZ Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2425 8 7 6 5 4 3 2 1
2428
rZ0lrZkZ Z0ZnZpZp 0Z0OpZpZ Z0ZbZ0Z0 pZ0Z0Z0Z O0Z0Z0Z0 0Z0M0OPO Z0SQSBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2430
0Z0ZrZkZ Z0Z0ZpZp 0Z0l0ZpZ ZpZPZ0Z0 0O0Z0Z0Z Z0o0Z0ZP 0ZQZnOBZ Z0Z0SKZ0 a
c
rZ0lrakZ opZ0ZpZp 0Z0Z0mpZ Z0mPZbZ0 0ZNZ0A0Z L0M0ZBZ0 PO0Z0ZPO S0Z0ZRZK a
2427 8
b
2429
0mksrZ0Z opo0L0Z0 0Z0Z0Z0o l0ZPZ0Z0 0ZBZpZ0O Z0O0Z0Z0 PO0Z0ZPZ Z0JRZ0ZR a
0Z0Z0ZkZ Z0Z0Z0o0 0Z0ZRa0o o0Z0Z0Z0 ro0ZPM0Z Z0O0Z0O0 0O0Z0Z0O Z0Z0Z0J0 a
2426 8
Passed pawn
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZqskZ m0mbapop 0Z0ZpZ0Z Z0OpZ0Z0 0O0M0Z0Z Z0M0Z0O0 0Z0Z0O0O ZRAQSBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2431 8 7 6 5 4 3 2 1
2434
rZ0Z0skZ opZnZpo0 0Z0Z0l0o Z0oPZ0Zb 0ZPZPZ0Z ZPL0Z0Z0 PZ0M0OPO Z0Z0SRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2436
rZ0l0Z0s Z0Zbapj0 0m0o0ZpZ o0oPo0O0 0mPZPZ0Z Z0Z0MNA0 0O0LBOKZ S0Z0Z0ZR a
c
rZblnakZ opZ0Z0s0 0Z0o0ZnZ ZNZPo0op PO0ZPo0Z Z0Z0ZPZ0 0ZQABMPO Z0S0ZRJ0 a
2433 8
b
2435
0Z0ZrZ0Z Z0Z0okZ0 0o0o0ZNs Z0oPOPZ0 PoPa0O0o ZPZBZ0ZK 0Z0ZRZ0Z Z0Z0Z0Z0 a
rm0Z0skZ o0Z0Z0o0 bo0l0o0o Z0ZPM0ZQ 0Z0o0O0Z O0Z0Z0O0 0O0Z0ZBO S0ZRZ0J0 a
2432 8
Phalanx
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0Z0j o0Obl0Zp 0Z0Z0ZpZ Z0ZPo0Z0 0ZQo0ZPZ Z0Z0a0ZP PO0ZBZKZ S0Z0ZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2437 8 7 6 5 4 3 2 1
2440
rZbZnanj opo0l0Zr 0Z0o0Zpo ZNOPo0O0 0O0ZPo0O Z0ZNZPZ0 PZ0ABZKZ Z0SQZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2442
rZbl0snj opZ0Zpap 0Z0o0mpZ ZNoPo0Z0 0ZPZPZ0Z Z0ZNA0Z0 PO0ZBOPO S0ZQZRJ0 a
c
0ZbsrakZ Z0Z0Zpo0 pZ0Z0l0o Z0ZPo0Z0 0ZpZPZ0O SPZ0Z0O0 0AQZBO0Z Z0Z0S0J0 a
2439 8
b
2441
0ZnZrZ0Z s0ZblkZ0 0o0Z0apo o0oPo0o0 PZPZPZPZ ZRZNZPZP 0L0ZBAKZ Z0S0Z0Z0 a
0s0l0skZ Z0ZnZ0Z0 0Z0o0opZ o0OPonZp 0Z0o0O0A Z0Z0Z0Z0 POQZBZPO ZKZRZRZ0 a
2438 8
Phalanx
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zkl0s0s Z0ZbS0Zp pZ0o0O0a Z0mPZ0Z0 0o0M0Z0Z Z0Z0ZQZ0 POPZ0Z0O ZKZRZBZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2443 8 7 6 5 4 3 2 1
2446
0s0s0Z0Z Z0l0m0jp po0oPo0Z Z0o0ZPo0 0O0ZPZPZ Z0Z0Z0L0 PZ0S0ZBO Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2448
0sbZrZkZ Z0Z0Z0Zp pm0oPZpZ ZpoPZpZn qZ0Z0O0M Z0OQZ0O0 0Z0ZRZBO Z0A0S0ZK a
c
0ZqZrskZ ZpZnZ0a0 pZ0O0ZpZ O0O0ZpZ0 0Z0Z0ZpZ Z0Z0Z0Z0 0Z0ZBAPO Z0SQZRJ0 a
2445 8
b
2447
0Z0Z0skZ sbZnl0Zp pZ0ZpZpZ ZpZpO0Z0 0Z0O0Z0Z Z0ZBZ0O0 POQZNO0Z Z0S0ZRJ0 a
0ZrZkarZ S0ZbZ0Zp 0o0A0ZpZ ZNZpOPZ0 0Z0O0O0Z Z0ZQZ0MK 0l0Z0Z0O Z0Z0Z0Z0 a
2444 8
Phalanx
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0sbZ0skZ Z0l0Zpap pZ0o0mpZ S0mPo0A0 0O0ZPZ0Z Z0ZBZ0M0 NZQZ0OPO Z0Z0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2449 8 7 6 5 4 3 2 1
2452
rZbZrZkZ opZnZpZp 0apo0ZpZ Z0ZNZ0Z0 0OPZPAPZ Z0Z0Z0O0 PZ0Z0OBZ S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2454
rZbZkZ0s o0Z0Zpo0 0ZPZ0l0o Z0ZPZ0Z0 0aQZ0Z0Z Z0Z0ZNZ0 0O0ZpOPO S0Z0ZRJ0 a
c
rZ0Zka0s Z0Z0Zpop bZqopZ0Z o0ZnO0Z0 0ZPZ0Z0Z Z0ZQZNZ0 PZ0ZNOPO S0ARZ0J0 a
2451 8
b
2453
0s0Z0skZ Z0ZqZpap pZ0Z0mpZ Z0OPZ0Z0 0o0Z0Z0Z Z0MQZ0OP 0Z0A0OKZ Z0S0S0Z0 a
rZ0ZkZ0s o0Znl0Z0 0o0opZ0Z Z0o0Zpop 0OPONZ0Z O0Z0O0O0 0Z0Z0ZPO S0ZQZRJ0 a
2450 8
Phalanx
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrm0Z o0l0Zpmk 0ZpZ0Zpo ZpO0Z0Z0 0Z0ZPZ0Z Z0M0ZNOP PL0Z0OBZ Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2455 8 7 6 5 4 3 2 1
2458
rZnZ0ska ZpZqZ0mp 0Z0o0ZpZ o0oPo0O0 PZPZPo0O Z0MNZPZ0 0O0L0Z0Z Z0JRZ0AR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2460
rZbZ0a0s opZnZkop 0Z0O0Z0Z Z0Z0O0Z0 0Z0Z0Z0Z Z0Z0Z0Z0 PO0O0OPO S0A0J0MR a
c
0Zrl0skZ ZpZ0Zpop 0o0O0Z0Z o0ZNO0a0 PmQZ0ZPZ Z0Z0ZNZP 0ZbZBO0Z S0Z0ZRJ0 a
2457 8
b
2459
rZ0l0Z0j o0Z0Z0Zp 0o0O0ZpZ Z0oQOrZ0 0Z0m0Z0Z Z0Z0ZPZ0 PZ0ZBO0Z Z0ZRJ0ZR a
rZqZkZ0s o0Znapop 0o0ZpZ0Z Z0ZpO0Z0 0OpO0M0Z OnO0Z0ZQ 0Z0ZNOPO ZRA0ZRJ0 a
2456 8
Phalanx
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0Z0j o0Z0Z0ap 0ZQZ0ZpZ Z0oPZrZ0 qZPo0Z0Z OpZ0ZNZP 0O0Z0ZPZ ZKZRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2461 8 7 6 5 4 3 2 1
2464
rZ0ZrZkZ Z0ZqZpop 0Z0Z0m0Z ZpopO0Z0 pZ0O0Z0Z OnO0ZPO0 RZQZ0JBO Z0A0S0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2466
0Zks0Z0s Z0Z0Z0op pZ0Z0a0Z Z0Z0Z0Z0 pA0o0Z0Z ZNo0Z0Z0 0Z0Z0OPZ S0Z0ZRJ0 a
c
0Z0Z0Z0Z o0Z0lpZk 0Z0o0Z0O Z0Z0spa0 0Z0Z0ZpZ ZNO0o0L0 PZPZ0Z0Z ZKZRZ0ZR a
2463 8
b
2465
rZbZ0skZ Z0Z0Apap pZ0Z0ZpZ ZpoPZ0Z0 0Z0oPZ0Z Z0Z0ZPZ0 PO0S0ZPO ZKZ0ZBZR a
rZbZ0skZ opZ0Zpo0 0m0Z0m0o Z0oPZ0Z0 0lPLPZ0Z Z0Z0ZNZ0 PO0M0OPO S0Z0ZRJ0 a
2462 8
Phalanx
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZkZ Z0Z0Zpo0 0o0Z0Z0o Z0o0m0lP 0o0Z0Z0Z ZNZ0Z0ZQ 0sPZROPZ Z0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2467 8 7 6 5 4 3 2 1
2470
0Z0s0Z0Z Z0Z0ZkZp 0Z0ZpZpZ Z0Z0O0Z0 0o0m0O0Z s0o0J0O0 PZBZ0S0O ZRZ0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2472
rZ0l0skZ Z0Z0Zpap 0Z0opZpZ o0o0Z0Z0 QmPZPO0Z O0Z0ZRZP 0Z0ANZPZ ZRZ0Z0J0 a
c
0ZrZrZ0j Z0Z0Z0ap 0Z0o0ZpZ o0ZPZ0A0 0ZpZPZ0Z ZpZ0MPZR 0Z0Z0JPZ Z0Z0Z0ZR a
2469 8
b
2471
0s0ZrZkZ Z0Z0ZpZp 0Z0ObZ0Z ZpZ0Z0A0 0ZpZ0ZpZ Z0Z0Z0Z0 0aBZ0ZPO Z0ZRZRZK a
0Z0Z0Z0Z ZbZ0Z0o0 pj0a0o0o ZpZPZ0Z0 0ZpZ0Z0Z Z0O0ZBZ0 0Z0Z0OPO S0Z0J0Z0 a
2468 8
Phalanx
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ obZ0Zpo0 0Z0o0Z0o lpmnZ0Z0 0ZpM0Z0A Z0O0OBZ0 PZQZ0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2473 8 7 6 5 4 3 2 1
2476
0Z0lrZkZ Z0Z0apZp rZ0ZbZpZ ZpZ0Z0Z0 0ZpZBZ0Z o0A0ZNZP 0Z0ZQOPZ S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2478
0s0Z0skZ Z0Z0Z0Zp pZ0ZqZ0Z ZpopZpZ0 0Z0ZnL0M Z0O0ZPO0 PZ0Z0ZBO Z0Z0S0J0 a
c
rZ0Z0skZ Zpo0m0a0 0Z0o0Z0Z o0ZPo0Zq 0ZPZPo0Z ZQJ0ZNo0 PO0ZBAnZ S0SNZ0Z0 a
2475 8
b
2477
0Z0Z0Z0Z ZpZ0o0jp 0ZpZ0ZpZ Z0Z0o0Z0 0Z0ZbOPZ S0Z0Z0ZP 0L0Z0Z0J Z0Z0ZqZ0 a
nZ0Z0Z0Z Z0Z0Zpj0 rZ0Z0a0o ORZ0ZpZ0 0ZpZ0A0Z ZpZ0S0ZP 0Z0Z0ZPZ Z0Z0ZKZ0 a
2474 8
Phalanx
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0ZkZ o0Z0Zpa0 0m0Z0ZpZ Z0Z0Z0Z0 PA0Z0ZpO ZBM0ZpZ0 0JPZ0Z0Z Z0Z0ZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2479 8 7 6 5 4 3 2 1
2482
rZbZ0skZ o0o0Z0op 0Z0Z0Z0l Z0ZpOpZ0 0Z0Z0Z0Z Z0Z0Z0Z0 POPZ0L0Z SNAKZBZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2484
0ZbZ0Z0Z ZrZ0Z0Z0 0ZkApZpZ o0ZpO0O0 0ZpO0Z0Z ZpO0Z0J0 0S0Z0O0Z Z0Z0Z0Z0 a
c
0Z0s0Z0Z opo0Z0Zp 0apZkZ0Z Z0Z0opZ0 0Z0Z0Z0Z APO0Z0Z0 PZ0MKorO S0Z0ZRZ0 a
2481 8
b
2483
0Z0s0Z0Z Z0Z0ZpZk 0Z0ZpZ0Z ZRZ0Z0ZP 0ZpZ0Z0Z Z0o0Z0Z0 0o0Z0Z0Z Z0Z0S0J0 a
0Z0Z0Z0Z oBa0s0j0 Po0Z0opZ ZPoRm0Zp 0ZPZ0Z0O ZKO0A0O0 0Z0Z0Z0Z Z0Z0Z0Z0 a
2480 8
Phalanx
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblkZ0s Z0Z0a0op 0ZpZ0Z0Z Z0opOpZ0 0ZPZnZ0Z Z0M0ZNZ0 PO0ZQOPO S0ARZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2485 8 7 6 5 4 3 2 1
2488
rZ0l0akZ ZbZnZ0o0 pZ0o0Z0o ZponZPZ0 PZ0Z0Z0Z Z0Z0Z0ZP 0O0Z0OPZ SBAQMNJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2490
0Z0s0ZkZ Z0s0ZpZ0 0opl0ZpZ ZbZnM0Z0 0O0O0ZBZ Z0Z0Z0Z0 0Z0L0OPZ ZRZ0S0J0 a
c
0jrZ0s0Z ZpZ0l0Zp pZ0o0apL Z0ZBo0Z0 0Z0ZPZ0Z O0Z0Z0Z0 0OPZ0ZRO ZKZRZ0Z0 a
2487 8
b
2489
rZblrZkZ o0Z0Zpop 0onZ0m0Z Z0opZ0Z0 0Z0O0Z0Z O0OBOPZ0 0Z0ZNZPO S0AQZRJ0 a
rZblrZkZ opopZpop 0Z0Z0Z0Z Z0a0m0Z0 0ZPZ0Z0Z ZPM0O0Z0 PZ0ZBOPO S0AQZRJ0 a
2486 8
Rook manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0skZ o0Z0Zpop blpZpZ0Z ZpZnO0Z0 0O0Z0Z0Z Z0Z0ZQOP 0APZ0OBZ S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2491 8 7 6 5 4 3 2 1
2494
rZ0Zka0s ZplbZpop pZ0o0m0Z Z0Z0o0Z0 0Z0SPOPZ Z0M0AQZ0 POPZ0Z0O Z0J0ZBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2496
rZbl0s0Z oponZ0Zk 0Z0Z0Z0a Z0ONopo0 0OBZ0Z0Z Z0Z0Z0Z0 PZ0Z0OPO ZRAQS0J0 a
c
0l0Z0Z0Z s0MrZpjp po0OpmpZ Z0ZbL0Z0 0Z0Z0Z0Z Z0Z0ZNZ0 PO0Z0OPO Z0SRZ0J0 a
2493 8
b
2495
0Z0ZrZkZ Z0Z0Zpo0 0Z0Z0s0Z Z0l0Z0Z0 PZnZpZ0Z Z0SbZ0O0 0Z0Z0OBZ S0L0A0J0 a
rZbs0ZkZ opZ0apo0 0Z0Zpm0o Z0l0M0Z0 0ZPZ0Z0A Z0ZBZ0Z0 PO0ZQOPO S0Z0ZRJ0 a
2492 8
Rook manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrmkZ ZbZ0apop pl0Zpm0Z ZpZpM0A0 0Z0O0Z0Z O0OBZ0ZQ 0O0M0OPO Z0Z0SRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2497 8 7 6 5 4 3 2 1
2500
0s0ZnskZ Z0l0apop pZbo0Z0Z ZpZ0OpZ0 0Z0A0Z0Z O0MBZ0L0 0OPZ0ZPO Z0Z0SRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2502
0Zrj0Z0s ZpZnZpo0 pZpApZbo O0OpZ0Z0 0Z0O0Z0Z Z0Z0OPZP 0O0Z0ZPZ S0Z0JBZR a
c
rZ0lrm0j Z0Z0Z0ap no0O0opZ o0o0oPZ0 PZQZNZ0O Z0Z0Z0M0 0O0Z0ZPZ S0ARZ0J0 a
2499 8
b
2501
0sblrZkZ o0Z0Zpop 0Zpa0m0Z Z0opZ0Z0 0Z0Z0Z0Z ZPZPO0Z0 PA0ZBOPO SNZQZRJ0 a
0sqZrZkZ oponZpop 0a0Z0Z0Z Z0Z0o0Z0 0Z0Z0ZbZ ZPZPZNO0 PA0ZPOBO Z0SQS0J0 a
2498 8
Rook manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ opZ0Zpop 0Z0Z0m0Z ZPZpZnZ0 0Z0Z0Z0Z Z0M0O0Z0 0O0ZBOPO S0AQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2503 8 7 6 5 4 3 2 1
2506
0sblnskZ Z0ZnZpZ0 po0o0ZpZ Z0ZPo0Zp PZNZPZ0Z Z0M0L0Z0 0O0ZBOPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2508
0j0a0Zrs opZqmbZ0 0Z0Z0Z0Z Z0OpZpO0 0L0O0Z0o Z0Z0Z0ZP PZ0ZNZBZ ZRA0ZRJ0 a
c
0Zrl0skZ ZpZ0apop pZbZpm0Z Z0Z0M0A0 0m0O0Z0Z Z0M0Z0Z0 PO0Z0OPO ZBSQS0J0 a
2505 8
b
2507
rZbs0ZkZ o0Z0a0op 0Zpo0o0Z l0Z0Z0Z0 0ZPZPL0Z ZPM0Z0Z0 PA0Z0ZPO Z0ZRZRJ0 a
rZ0lkZ0s ZpZ0ZpZ0 pZ0o0ZnA Z0ZPa0Z0 0Z0Z0Z0Z Z0O0Z0Z0 PO0LBZ0O S0ZKZ0S0 a
2504 8
Rook manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZkZrZ opl0Z0Z0 0ZnZpZnZ Z0ZpZpAQ bZ0O0Z0Z O0O0Z0Z0 0Z0ZNOPO S0Z0JBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2509 8 7 6 5 4 3 2 1
2512
rZ0Z0skZ Z0Z0apop bZ0Zpm0Z ZpZqM0A0 0Z0o0O0Z Z0ZBZ0Z0 PO0ZQZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2514
rZ0ZkZ0s ZqZ0Zpop pZ0ZpZ0Z ZNZbO0Z0 0a0Z0Z0Z ZPZ0A0Z0 0OPZ0LPO S0Z0ZRJ0 a
c
rZqZ0skZ oponZpop 0Z0Z0Z0Z Z0ZPA0Z0 0ZNZ0Z0a ZQO0Z0Z0 PO0Z0ZPO S0Z0ZRJ0 a
2511 8
b
2513
0Z0ZrZkZ ZqZnopZp po0Z0mpa Z0s0Z0Z0 0Z0Z0Z0Z ZPM0ONO0 PZ0ZQOKO A0SRZ0Z0 a
rZbZ0skZ opZ0mpop 0a0ZpZnZ Z0Z0O0M0 qZ0Z0Z0Z Z0ZBZNL0 PO0A0OPO S0Z0ZRJ0 a
2510 8
Rook manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0s0j Zpo0Z0ap 0Z0Z0Z0Z o0ZPonO0 0ZPZNo0O Z0Z0ZPZ0 PO0ZBZNZ S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2515 8 7 6 5 4 3 2 1
2518
rZ0ZqskZ obo0Zpa0 no0ZnZpo Z0Z0o0Z0 0OPZPZ0Z O0M0ANZP 0Z0Z0OPZ S0ZQSBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2520
rZ0lrZ0Z oponZpak 0Z0o0Z0o Z0Z0ZPZ0 0ZPmPA0Z Z0M0Z0Z0 PO0L0ZBO Z0S0ZRJ0 a
c
rZblnskZ Z0Z0Zpap nZ0o0ZpZ oNoPo0Z0 PZPZPZPZ Z0Z0Z0Z0 0Z0ABO0O S0ZQMRJ0 a
2517 8
b
2519
rZ0Z0skZ Z0mqZpan 0o0o0Zpo o0oPo0Z0 0ZPZPZ0M O0M0Z0O0 0O0A0O0O S0ZQZRJ0 a
rZbl0skZ opo0Z0ap 0Z0o0Z0m Z0ZPo0o0 0ZPZPmPZ Z0M0ZPZ0 PO0MBA0Z S0ZQJ0ZR a
2516 8
Rook manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZkZ0s ZbZ0apop pZ0opZ0Z Z0Z0Z0O0 0l0MPO0O Z0Z0Z0Z0 0OPZQZBZ ZKZRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2521 8 7 6 5 4 3 2 1
2524
rZ0Zka0s ZpZ0Zpo0 pZ0Z0Z0o Z0ZpOPZ0 0ZqZnZ0Z O0M0ZQZ0 0OPZ0A0O S0Z0J0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2526
0s0lkZ0s Z0ZbapZ0 0Z0ZpZpZ ZpmpO0Zp pZ0M0O0Z O0O0A0Z0 0O0ZBZPO Z0SQZRZK a
c
rZ0ZrZkZ ZblnZpop pZ0apZ0Z Z0ZPZ0O0 NZ0Z0O0Z Z0Z0ABZ0 PO0Z0Z0O S0ZQZRJ0 a
2523 8
b
2525
0s0s0ZkZ ZqZ0ZpZp pZ0ZpZpL ZpZnZ0Z0 0Z0Z0Z0Z Z0O0ZNZP PO0Z0OPZ Z0ZRS0ZK a
rZ0l0j0s ZpZbapZ0 0mnZpZpZ o0ZpO0Zp 0Z0O0O0Z OPZBZNZ0 0Z0ZNZPO S0AQZRZK a
2522 8
Rook manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ opZ0Zpo0 0Z0Z0Z0o Z0ZpO0Z0 0Z0O0ZbZ Z0O0ABl0 PZ0ZPZ0Z ZRL0S0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2527 8 7 6 5 4 3 2 1
2530
rZ0Z0Z0s Z0oRZbj0 0o0ZqZ0o mQZ0o0Z0 pZPZPoPZ O0O0ZPZ0 0Z0ZBA0S ZKZ0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2532
rmbZkZ0s o0ZpZplp 0o0O0Z0Z Z0o0Z0Z0 0Z0Z0Z0Z Z0Z0Z0Z0 PZ0MPOPO Z0SQJBZR a
c
rZ0Z0Z0j o0Z0Z0Z0 0ZPM0Zrm Z0Opo0Z0 0Z0m0Zpl Z0S0Z0Z0 PZ0ZBOPZ Z0ZQZRJ0 a
2529 8
b
2531
rZ0ZrZkZ opZbZpZp 0Z0Z0o0Z l0ZpZ0Z0 0apO0ZPO Z0M0O0Z0 POQZ0O0Z ZKZRZBZR a
0ZrZ0ZkZ L0ZpZpap bZ0ZpZpZ l0Z0O0Z0 0Z0A0Z0Z Z0Z0Z0Z0 PZ0Z0OPO S0Z0Z0JR a
2528 8
Rook manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZrZkZ ZplbZpZ0 pZ0o0Zpo Z0ZPo0a0 PZ0Z0ZPZ ZQO0ZPO0 0O0Z0A0Z S0Z0SBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2533 8 7 6 5 4 3 2 1
2536
0s0ZrZkZ m0Zbo0Zp 0Z0l0opL Z0oPM0Z0 Po0Z0ZPZ ZPZ0Z0Z0 0A0Z0OBO Z0Z0S0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2538
rZ0ZkZ0s o0lbZpZ0 0o0ZpZ0o Z0ZpOpM0 PZnO0Z0L Z0Z0Z0Z0 0ZPZ0OPO S0A0S0J0 a
c
rZ0lnskZ Z0Z0apop pZ0o0Z0Z Z0ZPo0Z0 pZ0Z0Z0Z Z0O0ZQZP 0O0Z0OPZ S0A0SNJ0 a
2535 8
b
2537
rZ0s0Z0Z Z0A0Zpjp pZ0ZpZ0Z ZpZ0Z0Z0 0Z0Z0ZnZ ZBZ0ZbO0 POPZ0O0Z S0Z0S0J0 a
0l0s0skZ ZbZ0apZp 0o0opo0Z o0m0ZPZB 0ZPMPZ0L Z0M0Z0Z0 PO0S0ZPO Z0ZRZ0ZK a
2534 8
Rook manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0akZ o0o0Zpop 0Z0Z0Z0Z O0onONZ0 0Z0o0Z0Z ZPZ0Z0Z0 0ZPA0OPO S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2539 8 7 6 5 4 3 2 1
2542
0ZrZ0ZkZ o0l0Zpop 0o0ZbZ0Z Z0ZpZ0a0 0ZnA0ZPZ ONZBZPZ0 0OPZ0L0O ZKZRZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2544
0ZrlrZkZ obZnZpop 0Z0Z0m0Z Z0opZ0Z0 0Z0Z0Z0Z ZPM0ONO0 PL0Z0OBO S0ZRZ0J0 a
c
rZ0Z0skZ Z0Znl0Zp pZ0o0opZ ZpmPZ0Z0 PZpSPO0Z Z0Z0ZQOP NOBZ0ZKZ Z0Z0S0Z0 a
2541 8
b
2543
rZ0s0ZkZ Z0Z0lpZ0 0ZpZ0ZpZ o0Z0o0Zp PmQZPZ0a Z0M0A0ZP 0OPS0ZPZ Z0Z0ZRJ0 a
kZrZ0Z0Z opl0Z0o0 0m0a0s0o Z0ZnMpZ0 0ZpO0O0O Z0O0ZRZ0 POQZ0M0Z ZKA0Z0S0 a
2540 8
Knight manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ ZbZ0apop pm0Z0Z0Z Z0Z0O0Z0 0ZplNA0Z Z0Z0Z0Z0 PZBZQOPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2545 8 7 6 5 4 3 2 1
2548
0ZrZrZkZ ZbZnlpap po0o0ZpZ Z0Z0Z0Z0 0ZPOpZ0Z ZQZ0O0ZP 0O0MBOPA S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2550
rm0Z0skZ opZbl0op 0ZpZpm0Z Z0ZpZpZ0 0ZPO0Z0Z MPZ0ZNO0 PZ0ZPOBO S0L0ZRJ0 a
c
rZbl0Z0j opo0Z0ap 0Z0o0ZpZ Z0Z0ZrZ0 0ZPZ0ZnZ Z0M0Z0Z0 PO0ZBOPO S0AQZRJ0 a
2547 8
b
2549
0Z0Z0mkZ ZpZrspo0 pZpZ0Z0Z O0Z0Z0Z0 0ZPOpZno ZRM0O0Z0 0Z0Z0OPO ZRZ0ZNJ0 a
0s0Z0lnj S0ZbZra0 0Z0o0m0o Z0oPo0Z0 0ZPZPZ0Z Z0MNZ0Z0 0Z0ABZ0O L0Z0Z0SK a
2546 8
Knight manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0Z0j o0ZrZ0Zp 0opoblpZ Z0Z0a0Z0 0ZPAPZpZ ZPM0L0Z0 PZ0S0OPO Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2551 8 7 6 5 4 3 2 1
2554
rZbl0jrZ opZ0Z0Z0 0Z0o0Z0Z O0ZPo0o0 0O0ZPmPo Z0M0MPZ0 0ZRZ0Z0Z Z0SQZBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2556
rZ0lrZ0j Z0ZbZ0ap po0O0ZnZ Z0oQo0o0 0Z0ZPo0Z A0M0ZPZ0 PZ0ZBZPO Z0ZRZRJ0 a
c
rZ0Zqs0j ZpobZ0ap 0Z0o0ZnZ Z0ZPZpA0 0OPZ0Z0Z Z0M0ZBZ0 0Z0L0ZPO ZRZ0ZRZK a
2553 8
b
2555
rZblnZ0a opZ0Z0Zk 0Z0o0mrZ ZPZPZpZp PANZpO0Z Z0M0Z0Z0 0Z0LBZPO Z0S0ZRZK a
rZ0l0snj ZpobZ0ap 0Z0o0m0Z Z0ZPZpZ0 0OPZ0S0Z Z0M0Z0Z0 0AQMBZPO Z0ZRZ0J0 a
2552 8
Knight manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0sbl0Z0j Z0Z0Zrap 0o0o0mpZ ZPZPopZn 0ZNZPZ0Z Z0M0ZPZ0 0AQZBZPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2557 8 7 6 5 4 3 2 1
2560
rZnlnskZ Z0ZbZpap 0Z0o0ZpZ Z0oPo0Z0 0ZPZPZ0Z ZQM0Z0Z0 0Z0MBOPO ZRA0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2562
rZ0Z0skZ Z0Z0l0ap nZ0o0mpZ ZNoPo0Z0 0ZPZ0Z0Z Z0ZQZ0O0 0Z0A0ONO ZRZ0S0J0 a
c
rZ0l0skZ opZ0Z0ap 0m0o0m0Z Z0oPobZ0 0ZPZ0Z0Z Z0M0A0Z0 PO0ZBO0O S0ZQM0SK a
2559 8
b
2561
rZrZ0m0Z o0Z0l0j0 0o0o0Zpa Z0ZPo0Zp 0ZPZNZ0Z ZRZ0Z0ZP PZ0ZQOPZ Z0ZRM0J0 a
0ZrZrZ0Z o0Z0lnj0 0o0o0o0Z Z0oPo0op 0OPZPm0Z O0M0Z0ZP 0Z0S0OPM Z0ZQS0J0 a
2558 8
Knight manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0Z0j o0s0Znmp 0oBo0lpZ Z0ZPopZ0 0O0ZPZPO ZRZ0ZPZ0 0Z0L0A0Z Z0Z0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2563 8 7 6 5 4 3 2 1
2566
rZbl0snj opZ0Z0a0 0ZpO0ZpZ Z0O0o0Zp 0O0ZPo0Z Z0M0ZNZP PA0Z0ZPZ S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2568
0Z0Zns0j Z0Z0Z0s0 pZNoBl0a Z0oPo0Zp 0ZPZPo0Z O0Z0ZPZ0 0S0Z0L0O ZRZ0Z0ZK a
c
0Z0Z0skZ Lpo0Z0a0 0Z0o0ZbZ ZNZPo0op 0OPZ0l0Z Z0ZnM0Z0 0Z0ZBOPO Z0Z0ZRJ0 a
2565 8
b
2567
rZrZ0ZkZ onZ0l0Z0 no0o0ZpZ Z0oPo0op 0OPZPZ0Z O0M0LPZ0 0Z0M0ZPO ZRZ0ZRJ0 a
rZbZrZkZ Z0ZnZpa0 po0l0m0o Z0oPo0o0 QZPZPZ0Z O0M0Z0A0 0Z0MBOPO SRZ0Z0J0 a
2564 8
Knight manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbs0mkZ Zpl0Z0ap 0ZpZ0opZ o0O0oPZ0 PZ0ZPZ0Z Z0M0A0ZP 0OQZBZPZ Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2569 8 7 6 5 4 3 2 1
2572
rm0ZrZkZ opZ0Zpap 0l0obmpZ Z0o0Z0Z0 0ZPZPA0Z ZQM0ZNZ0 PO0ZBOPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2574
0m0ZnZkZ o0aqZ0Zp 0o0o0ZpZ ZPZPo0Z0 PZQZPZ0Z M0Z0A0ZP 0Z0Z0MPZ Z0Z0Z0J0 a
c
rZbZ0j0s Z0l0ZPo0 pZ0opa0Z ZpZ0m0Z0 0Z0MPZ0Z ZPM0A0Z0 0OPZ0ZQO Z0JRZ0ZR a
2571 8
b
2573
0Z0ZrZkZ obZ0ZqZp no0oropZ Z0o0Z0Zn 0ZPZPZ0A ZNOBZPZ0 PZ0L0ZPO Z0ZRS0ZK a
0s0Z0Z0s Z0Zqmpj0 0Z0o0Zpa ZpZPo0Z0 pO0Z0Z0Z O0ORZNO0 0Z0ZQOBZ S0Z0Z0J0 a
2570 8
Knight manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0lrZ0ZkZ ZrZ0Zpo0 0Zno0m0o Z0Z0oPZ0 0Z0ZPZ0Z SNO0S0O0 0O0Z0ZBO Z0ZQZ0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2575 8 7 6 5 4 3 2 1
2578
rZ0ZrmkZ ZbZ0Zpap pZqZpZpZ ZpZpO0O0 0Z0A0O0L Z0M0Z0ZR POPZ0ZBO S0Z0Z0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2580
rZ0Z0ZkZ Z0ZbZ0o0 pZnZpZ0Z ZpZpZ0Z0 0Z0O0s0Z Z0M0ZNZ0 PO0Z0OPZ Z0ZRS0J0 a
c
rZ0Z0Z0Z opsbjpZp 0m0Z0o0Z Z0Z0o0Z0 0ZPZ0Z0O ZPZ0ZNZ0 PJ0SBOPZ Z0ZRZ0Z0 a
2577 8
b
2579
0l0Z0skZ ZpZbs0op pZnapm0Z Z0ZpZ0Z0 0Z0O0Z0Z O0ZBANZP 0OQZNOPZ Z0S0S0J0 a
rZblkZ0s opZ0anop 0Z0Z0m0Z Z0opZ0M0 0Z0Z0Z0L Z0O0Z0Z0 POBZ0OPO S0A0J0MR a
2576 8
Knight manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ opl0apop nZpZpZ0Z Z0Z0Z0Zb PmNOPZ0Z ZPM0Z0O0 0Z0L0OBO S0A0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2581 8 7 6 5 4 3 2 1
2584
rZbs0ZkZ Z0lnapo0 pZpZ0m0o ZpO0o0Z0 0O0ZPZ0Z Z0M0ZNZ0 PAQZBOPO ZRZ0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2586
rZ0Z0Zns Zpobl0jp pZnZ0opZ Z0Z0o0Z0 BZ0ZPZ0Z M0O0LNZ0 PO0Z0OPO S0ZRZ0J0 a
c
0Z0l0s0j ZpZ0a0op pZro0Z0Z Z0ZQobZ0 0ZPZ0Z0Z MPZ0APZ0 PZ0Z0ZPO Z0SRZ0J0 a
2583 8
b
2585
0sbj0Z0s Z0Z0Zpa0 0ZnZpMpZ Z0lpO0Z0 po0o0OPo Z0ZPZ0Z0 POPZ0ZBO ZKMRL0ZR a
0Z0lrakZ Z0ZnZpop 0Zbo0m0Z ZpZ0o0A0 0Z0ZPZ0Z MBO0ZNZP 0O0Z0OPZ Z0ZQS0J0 a
2582 8
Knight manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblnZkZ Z0Z0ZrZ0 0o0o0apZ o0mPo0Zp PZPZPo0Z SNM0ZPZ0 0Z0ZBAPO Z0ZQZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2587 8 7 6 5 4 3 2 1
2590
rZ0ZkZns ZbZ0Zpo0 pZ0l0a0Z Z0oPo0Zp Po0ZPZ0Z Z0M0A0L0 0OPZBZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2592
0Zks0Z0s opZbl0Zp 0ZpZ0ZpZ Z0o0o0Z0 0Z0ZPm0Z Z0MPLNZP POPZ0ZPZ Z0JRZ0S0 a
c
0l0ZrskZ ZbZ0a0op po0Zpm0Z Z0ZnMpZ0 0Z0O0Z0Z O0M0Z0ZQ BO0A0OPO Z0ZRS0J0 a
2589 8
b
2591
rZ0ZrZkZ Zbl0Zpop pZpanZ0Z Z0Z0o0Z0 Po0ZPZ0Z Z0M0APOB 0OPZ0L0O S0Z0S0J0 a
0sbZrZkZ ZpZ0Zpa0 0MpZnZpZ o0Z0o0o0 PZ0ZPZBZ Z0M0Z0ZP 0OPZ0OPZ S0ZRZ0J0 a
2588 8
Knight manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ Z0l0apop pZnZpm0Z ZpZ0Z0Z0 0Z0Z0Z0Z O0MRONZ0 BOQZ0OPO S0A0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2593 8 7 6 5 4 3 2 1
2596
rZ0lka0s Z0o0Zpop pZ0ZnZbZ ZpZpO0Z0 0Z0O0OPZ ZBZ0Z0ZP PO0M0Z0Z S0AQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2598
0Zra0ZkZ Z0Z0ZnZp 0ZpZpZpO ZqZpOpZ0 0O0O0A0Z Z0Z0ZNZ0 0Z0L0OPZ Z0S0Z0J0 a
c
rZ0Z0skZ o0o0Zpl0 0ono0Z0Z Z0Z0Zbo0 0ZPZ0Z0Z O0L0OPA0 0O0ZNZPZ Z0JRZ0ZR a
2595 8
b
2597
rZ0Zka0s ZpZ0opop 0onZ0Z0Z Z0ZpZbZ0 0Z0O0Z0Z Z0Z0ONZ0 PO0A0OPO S0Z0JBZR a
rZ0ZrZkZ Zblnapop pZno0Z0Z Zpo0oNA0 0Z0ZPZ0Z Z0OPZNZ0 POBZ0OPO S0ZQS0J0 a
2594 8
Bishop manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrlkZ s0ZnZpZp bopZ0ZpZ Z0Z0Z0Z0 PZ0ONZnZ Z0ZBZ0O0 0L0M0O0O S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2599 8 7 6 5 4 3 2 1
2602
0ZrZnZkZ o0Z0Z0op ro0ZPo0Z l0Z0Z0Z0 bZpA0Z0Z Z0O0ZPZ0 0L0Z0ZPO S0Z0SBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2604
rZ0Z0snj Zpoqapop 0ZnZbZ0Z o0ZpO0Z0 0Z0O0Z0Z OBZ0MNZ0 0OQZ0OPO S0A0S0J0 a
c
rZ0ZnakZ ZpZbZ0s0 0Z0o0Z0Z ZNZPo0lp PZ0ZPoPm Z0Z0Z0ZP 0O0ZBMPZ Z0SQARJ0 a
2601 8
b
2603
0Zbl0skZ orZ0Znap 0Zpo0opZ Z0o0Z0Z0 0Z0ZNA0Z Z0ZPZNZP POPZ0OPZ ZRZQS0J0 a
rZbl0anj opZ0Zrmp 0Z0o0ZpZ Z0oPo0O0 0ZPZPo0O Z0MNZPZ0 PO0ABZKZ Z0S0Z0LR a
2600 8
Bishop manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0ZkZ o0obZ0Z0 0o0o0s0Z Z0ZPZnMp 0ZPa0OpZ Z0ZBZ0Z0 PZ0A0ZPO ZRZQS0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2605 8 7 6 5 4 3 2 1
2608
rZnlnskZ Z0ZbZ0ap 0o0o0Z0Z ZPZPo0Z0 NZNZPZpZ A0Z0ZPO0 0Z0ZBZ0Z ZRZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2610
0sbZ0skZ ZpZnl0ap pZpZ0opm Z0O0o0Z0 NZ0ZPZ0Z Z0Z0ZNZ0 POQABOPO Z0ZRZRJ0 a
c
rZbZ0skZ o0ZqZnap no0o0ZpZ Z0oPopZ0 0OPZPZ0A O0M0ZPZ0 0Z0MBZPO ZRZQZRJ0 a
2607 8
b
2609
0Z0Z0skZ opZ0ZqZ0 0Z0o0s0a ZPZPo0Zp 0ZRZQZpZ Z0ZNZ0Z0 PZ0Z0OPO Z0Z0ZRJ0 a
rZbZqskZ o0Z0Znap no0o0Z0Z Z0oPo0o0 0OPZPo0Z O0MBZPZP 0Z0M0APZ ZRZQJ0ZR a
2606 8
Bishop manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0jrZ0Z o0obZpop 0o0a0Z0Z Z0Z0ZqZ0 0ZBO0Z0Z Z0Z0A0O0 PZPZ0O0O S0ZQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2611 8 7 6 5 4 3 2 1
2614
0Z0arskZ Zpl0Zpo0 pZ0o0Z0Z O0ZPo0Zp QZPZnZ0Z Z0Z0A0OB 0O0Z0O0O S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2616
0Z0ZrskZ ZpZqa0op pAbopZ0Z O0Z0Z0Z0 0Z0ZPo0Z Z0Z0Z0OB 0OPZ0O0O S0ZQS0J0 a
c
0Z0Z0sbj ZpZ0ZqZ0 pZnZps0o Z0ZpZ0o0 0O0O0a0Z O0ZQZNMP 0Z0ZROPZ ZBZ0S0J0 a
2613 8
b
2615
0Zrj0a0Z Z0ZbZpZ0 0Z0Z0ZpZ o0l0O0O0 0o0oPZ0Z ZPZQZ0A0 PZPZNZ0Z ZKZ0Z0ZR a
0Zrs0ZkZ ZbZ0lpop pZ0ZpZ0Z Zpm0O0Z0 0Z0M0Z0Z O0Z0L0Z0 0OPZ0ZPO ZKZRSBZ0 a
2612 8
Bishop manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0ZkZ ZpZnZro0 plnZpo0o Z0ZpO0Z0 0O0O0O0Z O0ZBZNZ0 0Z0LNZPO Z0S0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2617 8 7 6 5 4 3 2 1
2620
0Z0Z0skZ opZbZ0op 0l0ZpZ0Z Z0apm0Z0 0Z0M0Z0Z ZPZ0Z0OB PZ0ZNZKO S0AQZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2622
rZ0s0mkZ opZ0Zqop 0ZpZpo0Z Z0Z0Z0Z0 0Z0O0O0O Z0Z0ZQOB POPZ0Z0Z Z0JRS0Z0 a
c
0m0lkm0s s0Z0ZpZ0 0o0ZpZ0o oPZpO0aQ 0Z0O0ZNo ZNZ0ZRZ0 0O0A0OPZ S0Z0J0Z0 a
2619 8
b
2621
0Z0ZkmnL Z0Z0lbZ0 0Z0Z0ZpZ opZpOpO0 0ZpO0M0Z Z0O0A0Z0 POBJ0Z0Z Z0Z0Z0Z0 a
0Z0Z0skZ ZpZ0ZpZp 0Z0obapZ Z0m0o0Z0 0ZPZPZ0Z sPM0ZBZ0 0Z0A0OPO ZRZ0ZRJ0 a
2618 8
Bishop manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0Z0s ZpoqZ0op pZpa0ZnZ Z0Z0o0Z0 0Z0ZPZ0Z ZQO0APSP PO0Z0O0J SNZ0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2623 8 7 6 5 4 3 2 1
2626
0jns0Z0s opZbZpZ0 0ZnZpZpo l0ZpO0Z0 PZpO0M0Z Z0O0Z0Z0 0ZPABOPO S0Z0LRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2628
0s0l0skZ ZpZ0opap pZ0o0mpZ Z0Z0ZbZ0 0ZPZ0Z0Z Z0M0A0O0 PO0LPOBO S0Z0ZRJ0 a
c
rZbl0skZ Z0o0Zpop pZ0o0m0Z O0m0o0Z0 0ZQZPZ0Z Z0O0Z0O0 0O0M0OBO S0A0J0ZR a
2625 8
b
2627
rZ0Z0skZ opZ0Zpop 0mnl0ZbZ Z0Z0Z0A0 0Z0o0Z0Z O0ZBZPZ0 0OPZNLPO Z0ZRZRJ0 a
rZ0Z0Z0s Z0Z0jpZp 0Zbo0o0Z o0l0oPaN 0o0ZPZ0O Z0ZBZQZ0 POPZ0ZPZ ZKZRZ0ZR a
2624 8
Bishop manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0Z0Z Z0l0Zpap pZrZpZ0Z Z0o0ZpZ0 0ZPZ0O0Z Z0Z0AQZ0 PZPZ0ZPO ZRZ0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2629 8 7 6 5 4 3 2 1
2632
0Z0Z0ZkZ s0ZbZ0Zp pm0ZpZpZ ZpZpO0O0 0Z0Z0O0Z ZBZ0Z0M0 PO0Z0ZPJ Z0S0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2634
rZba0s0j Z0ZqZ0op pm0o0Z0Z Z0ZPo0Z0 0O0ZNZ0Z Z0ZBA0ZP 0Z0Z0OPZ S0ZQZRJ0 a
c
0Z0s0Z0Z LpjnZpo0 0ZpZ0ZpZ Z0Z0Z0Zr 0ZBO0l0Z Z0Z0Z0ZP POPS0O0Z Z0JRZ0Z0 a
2631 8
b
2633
0Zks0Z0s opo0Zpo0 0a0o0m0o Z0Z0Z0Zq 0Z0oPO0Z ZPZPZNZP 0OPA0ZPZ S0ZQZRJ0 a
rZ0ZqmkZ o0Z0s0Zp 0ZbZpZ0A Z0OpLpZ0 0Z0Z0Z0Z Z0Z0ZPZ0 PZ0Z0ZPO Z0S0SBJ0 a
2630 8
Bishop manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblkZ0s Z0Z0mpZp ponapZpO Z0ZpZ0Z0 0Z0O0Z0Z Z0M0ANZ0 PO0ZPOPZ S0ZQJBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2635 8 7 6 5 4 3 2 1
2638
rZ0ZrZ0j ZpZ0Z0Zp 0ZbZqZpZ o0opOpZ0 0Z0Z0O0Z Z0O0Z0L0 POBS0ZPO Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2640
rZ0Zka0s Z0oqZpop pZnZnZ0Z ZpZpO0Zb 0Z0Z0Z0Z ZNO0ZNZ0 POBZ0OPO S0AQS0J0 a
c
rZ0lrmkZ opZ0Z0op 0apZbo0Z Z0ZpZ0Z0 0O0O0O0Z Z0ZBMNO0 PZQZ0O0O S0Z0ZRJ0 a
2637 8
b
2639
rZ0Zkans ZpZqZ0o0 0ZnZpZ0o ZQZpOpZ0 PO0Z0Z0Z Z0ZNANZ0 0Z0Z0OPO S0Z0ZRJ0 a
0ZrZ0ZkZ Z0Z0Zpo0 pZ0l0a0Z ZpZ0o0Z0 bOrZ0Z0Z O0Z0OQZP 0Z0ZNOPZ ARZ0S0J0 a
2636 8
Bishop manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZqZ0s0Z Z0Zbanjp pZ0o0opZ ZpZPo0Z0 0ZpZPZPZ Z0O0M0MP POBZQOKZ S0Z0Z0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2641 8 7 6 5 4 3 2 1
2644
rZbZkZns opZnZ0op 0Z0Zpo0Z Z0o0Z0Z0 0ZPZ0l0Z Z0A0Z0Z0 PO0MBOPO S0ZQJ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2646
0Z0Zra0j o0ZRZ0Z0 0opZnZqo Z0O0ZpZ0 0OBZpO0A Z0Z0Z0Z0 PZQZ0ZPO Z0Z0Z0J0 a
c
rZ0l0skZ opo0Zpop 0ZnZba0Z Z0ZnZ0Z0 0Z0O0Z0Z O0MBZNZP 0O0Z0OPZ S0AQS0J0 a
2643 8
b
2645
0Zks0a0s opZqopZp 0ZnZbo0Z Z0ZpZ0Z0 0ZPO0Z0Z O0M0Z0O0 0O0Z0OBO S0ZQJ0MR a
0Z0Z0skZ Z0l0Zpap 0Z0ZbZpZ Z0OpZ0Z0 0Z0Z0Z0l ZNZ0APZ0 Ps0Z0ZPO S0ZRZ0J0 a
2642 8
Bishop manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ opZbapop 0m0ZpZ0Z m0Z0O0Z0 0O0Z0Z0Z O0Z0ZNO0 0ZQM0OBO S0A0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2647 8 7 6 5 4 3 2 1
2650
0ZrZrZkZ Zbl0apop pZ0opZ0Z o0m0Z0Z0 PZ0ZPOPZ ZPM0ZBZ0 0ZPA0Z0O Z0S0LRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2652
rZ0ZrZkZ opZ0lpZ0 0anZ0m0Z Z0ZBZ0A0 0Z0Z0Z0Z Z0M0Z0Ob PO0SPO0O Z0ZQZRJ0 a
c
0Z0ska0s o0Z0opop blpZ0Z0Z Z0Z0M0Z0 0O0ZPZ0Z Z0O0Z0Z0 0Z0Z0OPO S0AQJ0ZR a
2649 8
b
2651
0Z0s0Z0j Z0Z0Z0Zp 0ZpZno0Z Z0Z0o0oq 0Z0ZPZ0Z Z0OrZPZ0 PO0Z0SNO Z0Z0LRZK a
rZ0ZrZkZ o0lnZpap bo0o0ZpZ Z0oPZ0Zn 0Z0Z0Z0Z O0M0ZNO0 0OQAPOBO S0Z0S0J0 a
2648 8
Queen manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ o0Z0Zpop 0ono0m0Z Z0o0Z0Z0 0ZPOpO0Z ZNO0O0Z0 PZ0ZBZPO S0AQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2653 8 7 6 5 4 3 2 1
2656
0Zbs0skZ Z0lnZpZp pZ0Z0mpZ Z0Z0o0Z0 PZpZPZ0Z Z0O0LNMP 0ZBZ0OPZ ZRZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2658
rZbl0Z0Z ZpZ0m0ak pO0o0ZrZ Z0ZPopZp 0ZNZPmpZ AQM0Z0Z0 PZ0Z0OPO Z0S0SBJ0 a
c
rZ0Z0s0j Zpo0l0Zp 0Z0o0mpZ ZNOPo0Z0 0O0ZPZnZ Z0Z0ZROb 0ZQMBZ0O ZRZ0Z0J0 a
2655 8
b
2657
0Z0Z0akZ ZpZ0Z0Zr pM0o0ZqZ ObZPo0Z0 0O0ZPoPZ Z0S0ZQZ0 0Z0A0ZPZ Z0Z0Z0J0 a
rZ0l0s0j Z0MbZ0Zp 0opO0Zpm Z0Lno0Z0 0O0ZNZ0Z Z0Z0ZPZ0 0Z0ZBZPO ZRZ0ZRJ0 a
2654 8
Queen manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0ZkZ ZpZblpZp 0Z0o0mpZ ZPsPo0Z0 0Z0ZPZ0Z Z0M0Z0Z0 0L0ZBOPO S0S0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2659 8 7 6 5 4 3 2 1
2662
rZ0lrZkZ opZ0ZpZn 0Zpo0ZpZ Z0m0a0Op 0ZPMPZ0Z Z0M0APZb PO0LBZ0O Z0ZRZ0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2664
rZ0lrZkZ opZnZpap 0Z0o0Z0Z Z0oPZ0Z0 0ZPZpZ0Z Z0Z0A0ZP PO0M0OPZ S0ZQZRJ0 a
c
rZ0Zka0s Z0Z0Zpo0 pZ0ZpZ0Z l0ZbZ0O0 0o0Z0A0Z ZPZ0LpZB 0OPZ0Z0Z ZKZRZ0ZR a
2661 8
b
2663
0ZrlnZkZ ZpZbZ0Z0 pZ0o0apZ Z0oPZpZ0 0ZPZ0A0Z Z0MBZ0Z0 PO0L0OPZ Z0Z0S0J0 a
rZ0Z0a0j ZpZ0Z0s0 0A0o0Z0Z O0ZPoqZ0 0LRZ0Zpo Z0Z0Z0Z0 0Z0Z0OPO Z0Z0S0J0 a
2660 8
Queen manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Z0Z Z0Z0jpZ0 0l0ZpZpZ ZpZbL0O0 0o0ZnZ0Z Z0Z0Z0ZB POPZ0Z0Z ZKZRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2665 8 7 6 5 4 3 2 1
2668
0ZrZka0Z AbZ0ZpZ0 pZ0o0ZpZ ZpZ0o0O0 0ZqZPZ0Z O0M0LPZr 0OPS0Z0Z ZKZ0Z0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2670
rZbZkZ0s opZnapo0 0l0ZpZ0o Z0ZpO0Z0 0Z0Z0Z0Z Z0ZBZNZ0 POQA0OPO Z0S0ZRJ0 a
c
0j0s0m0s o0l0a0o0 0o0ZpZ0Z ZPZpO0Z0 0ZnO0Z0Z Z0ZQZNZ0 PZ0A0ZKO S0S0ZNZ0 a
2667 8
b
2669
0Z0lkZ0s ZpZbZpo0 0a0ZpZ0o mPZpO0Z0 0Z0Z0Z0Z Z0OBZNZ0 0Z0A0OPO L0Z0ZRJ0 a
rZbZ0skZ opZ0Z0o0 0Znapl0o Z0Z0Z0Z0 0ZPo0Z0Z ZPZ0ZNZ0 0O0Z0OPO SBAQZRJ0 a
2666 8
Queen manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ opZ0Zpo0 0Z0ZpZ0o Z0anZ0Z0 0Z0Z0Z0Z Z0ZBZNZ0 POPA0OPO S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2671 8 7 6 5 4 3 2 1
2674
0Z0ZrskZ o0ZqZ0op 0o0o0Z0Z Z0oPm0Z0 0Z0ZPZ0Z Z0Z0OPOb PZRZ0Z0Z Z0AQS0JB a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2676
0s0Z0Z0Z Z0ZqZrjp 0Z0oRo0Z Z0oPZPZ0 0oPZ0Z0o Z0Z0Z0O0 PZ0L0Z0Z Z0Z0S0J0 a
c
rZbZkZ0s Zpl0Zpo0 pZpZ0Z0Z Z0a0oPZp 0ZPZPZnZ Z0MBZQZ0 PO0Z0ZPO S0A0ZRZK a
2673 8
b
2675
rZ0lrZkZ Z0o0apZp pZbZ0ZpA ZpZpO0Z0 PZnO0Z0Z Z0O0ZNZ0 0ZBZ0OPO S0ZQS0J0 a
0Z0s0Z0Z ZpZqZ0a0 0mpZ0oko Z0Z0oNo0 pZ0ZPZPZ ZPZrZNO0 PZ0ZQOKZ Z0S0Z0ZR a
2672 8
Queen manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0ZkZ opl0arop 0ZpZ0Z0Z Z0Z0Z0Z0 PZ0M0ZnZ Z0MQA0O0 0OPZ0O0O S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2677 8 7 6 5 4 3 2 1
2680
0ZrZrakZ ZblnZpop pZ0opZ0Z o0Z0Z0Z0 PZ0ZPOPZ Z0M0ABZ0 0OPS0L0O Z0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2682
0s0lrZkZ Z0Z0Zpap pZ0o0Z0Z Z0oPO0Op 0ZpZ0O0Z Z0Z0A0Z0 PO0L0Z0O S0Z0ZRJ0 a
c
rZ0lka0s opZ0Zpo0 0ZpZbZ0Z Z0m0Z0Z0 0ZpZ0Z0Z Z0Z0M0O0 POQOPZBO S0A0ZRJ0 a
2679 8
b
2681
rZ0lkZ0s oponZpop 0ZpZbZ0Z Z0a0Z0Z0 0ZPZPZ0Z Z0M0Z0ZP PO0ZBOPZ S0AQJ0ZR a
rZ0l0skZ ZbZ0opap pZ0o0mpZ Z0Z0Z0Z0 0ZPLPZ0Z MPZ0ZPZ0 PA0ZBZPO S0Z0J0ZR a
2678 8
Queen manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ o0lnm0Zp bo0o0ZpZ Z0ZPo0Z0 0Z0ZPZ0Z Z0M0LBOP PO0Z0Z0Z S0Z0J0MR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2683 8 7 6 5 4 3 2 1
2686
rZ0Z0skZ Z0oqZpop bonZ0m0Z o0a0o0Z0 PZNZPZ0M Z0O0Z0O0 0O0ZQOBO S0A0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2688
0ZrZ0skZ ZbZ0apop pl0o0m0Z ZpZ0oPZ0 0Z0ZPZ0Z OBM0Z0M0 0OPZ0ZPO S0ZQZRJ0 a
c
rZ0l0skZ o0o0a0Z0 0o0opm0o Z0Z0Z0o0 0ZPOpZ0Z Z0Z0APO0 POQZPZ0O S0ZRM0J0 a
2685 8
b
2687
rZbl0skZ opZna0op 0ZnZpZ0Z Z0ZpOpZ0 0o0O0Z0Z Z0ZBZNZQ PZPZ0OPO S0A0MRJ0 a
0ZqZ0ZkZ ZpZ0ZrZp 0Z0o0ZbZ o0Z0apZ0 0Z0Z0M0Z Z0M0ZQZ0 POPZ0ZPO S0Z0Z0J0 a
2684 8
Queen manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rmbl0skZ opZ0opap 0Z0o0ZpZ Z0Z0O0Zn 0Z0o0ZPZ ZPZ0ZNZP PAPZ0O0Z SNL0JBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2689 8 7 6 5 4 3 2 1
2692
0ZbZ0Zrj Z0l0ZrZp 0Z0Z0opZ o0a0o0Z0 PoPoPZPZ ZPZQZ0MP 0ZRZ0OBZ Z0Z0S0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2694
rZbl0skZ opo0Zpop 0ZnZ0Z0Z Z0ZpO0Z0 0Z0Z0A0Z ZNZQZ0Z0 POPZ0OPO S0Z0ZRJ0 a
c
0Z0Z0skZ ZblpZ0op pZ0ZpZnZ ZpZ0ZrZ0 0Z0Z0OQZ O0ZPA0Z0 0O0ZNZPO S0Z0ZRJ0 a
2691 8
b
2693
0s0Z0skZ obopZ0Zp 0o0lpZpZ Z0Z0mpZ0 0Z0Z0O0Z Z0Z0Z0OQ PZ0MBZ0O ZRA0ZRJ0 a
rZ0lrZkZ ZbZ0ZpZp 0Z0o0mpZ o0oPZ0Z0 0Z0ZPZ0M oPZ0Z0O0 0Z0L0OBO S0Z0S0J0 a
2690 8
Queen manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0ZkZ Z0obZpop pZ0o0a0Z Z0ZPZ0Z0 Po0M0O0Z ZPZ0Z0Z0 0APZ0ZPO S0Z0L0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2695 8 7 6 5 4 3 2 1
2698
0Z0lrZ0Z opZbZkZp 0Z0Z0opA Z0ZPZ0Z0 0ZrZPZ0Z Z0ZNZPZ0 PZ0Z0Z0O L0Z0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2700
0Z0l0skZ o0ZpZ0op bZrZpZ0Z O0ZnZpZ0 0Z0O0Z0Z O0Z0OPZN 0Z0A0ZPO S0ZQJ0ZR a
c
0Zks0s0Z o0ZnZpL0 0ZpOpZ0A ZbZ0Z0Z0 qZ0O0Z0Z ZpSpZNZ0 0O0Z0OPO Z0S0Z0J0 a
2697 8
b
2699
rZ0ZrZkZ Z0Zqopap 0ZpZ0ZpZ o0A0Z0Z0 RZ0OPZbZ Z0Z0ZNZ0 PZ0Z0OPO Z0ZQZRJ0 a
0s0Z0Z0Z Z0Z0l0Zp 0ZPZ0Zpj Z0Z0o0a0 0ZBZ0ZPZ Z0Z0ZQOK 0Z0Z0Z0Z Z0Z0ZRZ0 a
2696 8
Queen manoeuvre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0ZkZ ZpO0Z0on 0Z0lpZ0o Z0SpM0Z0 0Z0O0Z0O Z0L0Z0O0 0Z0Z0O0J Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2701 8 7 6 5 4 3 2 1
2704
0ZrZ0skZ o0Zbopa0 0o0o0m0o Z0Z0ZPoq 0ZnAPZ0Z ZBM0Z0ZP PZPZNZPL Z0Z0SRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2706
rZ0l0skZ ZQo0Z0op pZpa0Z0Z Z0ZnZ0Z0 0Z0ONZbZ Z0Z0A0Z0 PO0M0OPO S0Z0ZRJ0 a
c
rZbZ0skZ opZ0m0a0 0Z0Z0m0Z Z0o0opZp 0ZPZ0Z0A ZQM0l0O0 PO0ZNZBO Z0ZRZRZK a
2703 8
b
2705
rZ0a0skZ ZbZnZpop pZnZpZ0Z ZqZ0O0Z0 NZ0ZBO0Z ZNZ0L0Z0 0O0A0ZPO S0Z0ZRJ0 a
0sbZ0Z0s opZ0opj0 0Zno0mpZ Z0ZNZ0Zp 0ZBZPZ0Z l0Z0APZ0 PZPL0ZPO ZRZ0ZRJ0 a
2702 8
Capturing the queen
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZkZ0s Z0ZnZpZ0 po0o0mpl Z0oPo0ap 0OPZPZ0Z O0MBZPZ0 0ZQZNAPO ZRZ0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2707 8 7 6 5 4 3 2 1
2710
rZrZ0ZkZ ZbZnapop pZqZpZ0Z O0Z0Z0Zn No0ZPZ0Z Z0ZBZNA0 0O0ZQOPO S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2712
rZ0Z0ZkZ Z0Z0ZpZ0 qZ0abmpZ ZpZ0o0Zp 0OpZPO0Z Z0O0A0O0 0ZBZ0ZPM Z0ZRL0J0 a
c
0Z0ZrZ0Z Z0Zbl0j0 pZ0o0opo ZpZ0a0s0 0Z0MPZ0L Z0O0Z0O0 PO0ZBS0O Z0Z0ZRJ0 a
2709 8
b
2711
rmbl0skZ opZ0Zpap 0ZpZ0mpZ Z0ZpZ0Z0 NZ0O0Z0Z L0Z0ONZ0 PO0A0OPO S0Z0JBZR a
rmbZ0skZ ZpZ0opap 0Zpo0mpZ o0ZPZ0Z0 0lPZ0Z0Z Z0M0Z0O0 PO0MPOBO S0AQZRJ0 a
2708 8
Capturing the queen
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0Z0s opZ0jpop nZ0ZpZ0Z ZNopO0Z0 nZ0O0O0O O0Z0ZNZ0 qZPZ0ZPZ ZRL0JBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2713 8 7 6 5 4 3 2 1
2716
rZ0Z0ZkZ o0ZqZpZp 0Z0o0m0Z L0oPm0o0 0o0Z0Z0Z Z0ObZ0O0 PZ0A0OBO S0J0Z0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2718
rZ0lrmkZ obZ0apZp 0opZ0mpZ ZNZpZ0A0 0Z0O0Z0Z Z0Z0ONZB PO0Z0OPO Z0SQZRJ0 a
c
0s0Z0ZkZ L0oqZpop pZrZpZnZ Z0Z0Z0Z0 0mBO0Z0Z Z0A0OPS0 0O0ZKO0O S0Z0Z0Z0 a
2715 8
b
2717
rZbZkZ0s ZpZ0mpop pZ0ZpZ0Z Z0ZpO0Z0 0Z0Z0O0Z M0ZBZ0Z0 PZ0L0ZPO l0A0J0ZR a
rZbZrZkZ ZpopZpop pZnZ0ZnZ Z0Z0O0Zq 0Z0ZRZ0Z A0LBZNZ0 PZ0Z0OPO Z0ZRZ0J0 a
2714 8
Capturing the queen
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rmblka0s opopZpop 0Z0Z0Z0Z Z0Z0O0Z0 0Z0Z0ZnZ Z0Z0Z0ZP POPMPOPZ S0AQJBMR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2719 8 7 6 5 4 3 2 1
2722
rZblnskZ opZpopap 0Z0Z0ZpZ m0Z0O0Z0 0Z0M0Z0Z ZBM0A0Z0 POPZ0OPO S0ZQJ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2724
rZbZ0skZ o0o0apop 0Zpo0Z0Z Z0Z0O0Z0 0mPZNZ0l Z0ZBZ0Z0 PO0Z0OPO S0AQS0J0 a
c
rZ0ZqZ0j Z0Z0Zpop pZnZpm0Z ZpZ0Z0L0 0Z0A0O0Z O0Z0ZBZ0 0OPZ0ZPO Z0ZRZ0ZK a
2721 8
b
2723
rZblkZ0s opZnapop 0Zpo0Z0m Z0Z0o0M0 PZBOPZ0Z Z0Z0Z0Z0 0OPZ0OPO SNAQJ0ZR a
rZ0mkZ0s ZponZpZ0 0a0oqZpo o0ZNo0Z0 PZ0OPZ0Z Z0O0ZNZP 0O0Z0OPZ S0AQS0J0 a
2720 8
Capturing the queen
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblrZkZ oponapop 0Zno0Z0Z Z0Z0Z0Z0 0ZBMPZ0Z Z0M0Z0ZP POPZ0OPZ S0AQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2725 8 7 6 5 4 3 2 1
2728
rZ0ZrakZ o0Z0Zpop 0o0Zpm0Z m0Z0M0Z0 0ZPO0l0Z O0ZBZ0Z0 0A0ZQOPO Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2730
rZbZkZ0s oponmpop 0Z0o0Z0Z Z0a0Z0Z0 0Z0MqO0Z Z0O0Z0Z0 PO0ZBAPO SNZQZRJ0 a
c
rZ0ZrZkZ obZ0lpap 0o0L0ZpZ Z0o0o0Z0 PZNZ0O0Z Z0Z0Z0Z0 0O0ZBZPO S0A0ZRZK a
2727 8
b
2729
0Zks0Zrm o0ZnZ0Zp 0oqZpo0Z Z0ZpZ0Zb PSpO0ANZ Z0O0L0O0 0ZPZBO0Z S0Z0Z0J0 a
0ZrZrZ0Z ZbZnZ0j0 pZ0l0ZpZ O0o0ZpOp 0oBZpm0L Z0OPSNZP 0O0M0O0Z Z0Z0S0J0 a
2726 8
Capturing the queen
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZkZ0s mpablpo0 pZnZpZ0Z O0ZpO0Zp 0O0O0M0Z Z0ZBANZ0 0Z0L0OPO ZRZ0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2731 8 7 6 5 4 3 2 1
2734
rZrZ0ZkZ ZpZnopap pZnobZpZ l0ZNZ0Z0 0ZPZPZ0Z O0Z0A0Z0 0O0MBOPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2736
rm0Zka0s opo0Zpop 0ZbZpl0Z Z0Z0Z0Z0 0Z0O0Z0Z Z0ZBZNZ0 POPZ0OPO S0AQJ0ZR a
c
rZbZ0skZ o0ZnZnap 0Zpo0lpZ Z0Z0ZpZ0 0ZPMPZ0Z A0M0Z0ZP PZ0Z0OPZ ZRZQSBJ0 a
2733 8
b
2735
0Z0Z0Zrj opabZ0Zr 0ZpZqZ0Z O0OpZpZp 0O0OpZ0L Z0Z0O0O0 0Z0ZBZRO Z0Z0A0SK a
rZbZnZkZ o0Z0lrZ0 0Z0o0Zna ANoPo0Zp 0ZPZPoPZ ZRZ0Z0ZP PZ0LBMPZ ZRZ0Z0J0 a
2732 8
Capturing the queen
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0srZ0mkZ ZpZ0Zpop 0Z0Z0m0Z oPZ0Z0Z0 0lPo0O0Z Z0ZQZBO0 0ZRZ0O0O Z0A0ZKZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2737 8 7 6 5 4 3 2 1
2740
rZbZka0s Z0Z0Zpop pZnopZ0Z ZpZ0Z0Z0 0l0ZPOQZ Z0M0A0Z0 POPZ0ZPO Z0JRZBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2742
0Z0s0akZ Z0Z0mrZp pM0o0ZpZ Z0ZRo0Z0 0ZRZ0Z0Z lPZ0ZPZ0 PZ0ZQAPO Z0Z0Z0J0 a
c
0Z0ZnZkZ ZrZbZpap pM0o0ZpZ Z0oPo0Aq 0ZPZPZ0Z ORZNZPO0 0ZQZ0Z0O Z0Z0Z0J0 a
2739 8
b
2741
0s0s0ZkZ oBZ0opap nZ0Z0mpZ l0Z0Z0Z0 0Z0Z0Z0L Z0M0A0OP PO0ZPO0Z ZRZ0ZRJ0 a
rZ0Z0ZkZ o0lrZpa0 BZpZ0Z0o Z0Z0o0oP 0A0ZbmPZ L0Z0ZPZ0 POPZ0Z0Z Z0JRS0Z0 a
2738 8
Capturing the queen
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZkZ o0o0Z0Z0 0ZporZqZ Z0Z0mbZ0 0ZPZ0ZrZ ZPZ0Z0OQ PM0Z0Z0O S0Z0S0JB a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2743 8 7 6 5 4 3 2 1
2746
rZ0Z0skZ opZ0opa0 0Z0o0Zpo Z0Z0Z0Zq 0ZbZPZ0O Z0M0APZ0 POPL0ZPZ Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2748
0Z0a0Z0s Z0Z0s0Zp 0o0Z0o0j ZPZ0oBo0 0Z0ZPZPZ L0Z0ZPZq 0ZRZ0Z0O Z0ZRZ0ZK a
c
0Zbl0skZ o0Z0Zpap pZ0o0ZpZ Z0ZPZ0Z0 0ZpZQO0Z Z0OrZ0ZP PO0M0ZPZ S0A0ZRJ0 a
2745 8
b
2747
0j0Z0a0s ZpZrZbZ0 pZpO0o0Z M0O0onZp qO0Z0ZpZ O0ZNA0Z0 0Z0ZQOPO S0ZRZ0J0 a
0Z0Z0skZ ZbZ0l0Zp porZpopZ Z0ZnZ0Z0 PZPLNZ0Z Z0ZBZ0Z0 0O0Z0OPO Z0ZRS0J0 a
2744 8
Capturing the queen
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0skZ ZpZbZpap pZnLpo0Z Z0Z0ZPZB 0Z0ZPZ0Z ZNZ0ZRZ0 qZ0Z0ZPO ZNZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2749 8 7 6 5 4 3 2 1
2752
rZ0Zka0s ZpZbZpZ0 pZ0mpZ0Z ZqOPZpZ0 0Z0Z0OBo ONZQZ0Z0 0Z0M0ZPO S0Z0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2754
rZbZkZ0s opZ0opZp 0Z0Z0ZpZ Z0Z0Z0Z0 0ZBaPZ0Z l0Z0Z0Z0 PZ0A0OPO S0ZQZRJ0 a
c
rZbZkZ0s opZ0mpop 0Z0a0Z0Z Z0o0o0Z0 0ZPZ0Z0l Z0MPZ0Z0 PO0ZBOPO S0AQJ0ZR a
2751 8
b
2753
0Z0ZrZkZ S0Z0Zpap 0Z0o0mpZ ZpsPZ0Z0 0lpZPO0Z Z0M0ZBZP 0O0Z0LPZ Z0Z0ZRJ0 a
0Zbs0skZ ZpZ0apo0 pZpZ0m0o L0Z0MpZ0 PmBOPZ0Z Z0M0Z0A0 0O0ZQZPO S0Z0ZRJ0 a
2750 8
Capturing the queen
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0Z0j o0Z0ZpZp 0s0Z0ZpZ Z0obZ0Z0 PZ0Z0S0Z AnO0O0ZP 0SQZ0ZPJ ZBZ0l0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2755 8 7 6 5 4 3 2 1
2758
rm0j0Z0s opZ0Zpop 0Z0ZpmbZ ZNa0M0Z0 PZ0ZPZ0Z Z0Z0ZPZ0 0O0Z0ZPO S0AKZBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2760
0srZ0ZkZ mqZ0Z0ap pZpobZpZ S0Z0ZpZ0 PO0OpZ0Z Z0Z0OPO0 0ZQANZBO Z0Z0ZRJ0 a
c
0Zbs0m0Z ZpZrZko0 pZpZ0o0o Z0OPo0Z0 0O0ZPZ0Z ZNM0ZPZ0 0Z0Z0SPO S0Z0Z0J0 a
2757 8
b
2759
0ZkZ0Z0s opZrZpZb 0Z0ZpZ0o O0a0Z0on 0ZBZPZ0Z Z0M0ZPA0 0OKZ0ZPO S0Z0Z0ZR a
rZbZ0skZ Z0Z0apo0 pZpZpZ0o Z0Z0O0Z0 0ZPZNlPZ Z0Z0Z0Z0 PO0Z0ZBO S0ZQS0ZK a
2756 8
Piece on a bad square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZkZ ZpZ0Z0a0 0o0o0Zno ZPsPo0o0 0Z0ZPZ0Z Z0A0Z0O0 0O0Z0M0O Z0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2761 8 7 6 5 4 3 2 1
2764
rZ0l0skZ opo0Z0ap 0Z0o0Z0Z Z0ZPZbZ0 POPZ0opZ Z0M0Z0Z0 0A0M0O0O S0Z0S0JQ a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2766
rZbZ0skZ o0l0Znap 0ZpZ0Z0Z Z0Z0Z0o0 0Z0ZPo0Z ZQM0Z0ZP PO0ZBOPA S0Z0J0ZR a
c
0s0Z0skZ Z0mqm0ap pZ0o0opZ Z0oPo0ZP 0ZPZPZPZ Z0MBAPZ0 PZ0Z0Z0L Z0S0J0ZR a
2763 8
b
2765
rZbZrlkZ ZpZnZpa0 0Zpo0Zpo o0m0Z0Z0 0ZPMPA0Z Z0M0ZBZP PO0L0OPZ Z0ZRS0J0 a
0Z0srZkZ o0Z0ZpZp 0o0Z0lpZ mQZPa0Z0 0Z0Z0Z0Z Z0Z0A0ZP PO0ZBOPZ Z0S0S0J0 a
2762 8
Piece on a bad square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ o0Z0opap 0Z0o0mpZ lpmPZ0AP 0ZPZ0O0Z Z0M0Z0Z0 POQZBO0Z Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2767 8 7 6 5 4 3 2 1
2770
rZbZrmkZ Z0l0Zpap pZ0opZpZ ZpZ0mPO0 0Z0ZPZ0L Z0MBA0ZR POPZNZ0O S0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2772
rZ0Z0ZkZ o0Z0ZroN 0Zpl0Z0o Z0ZpZ0Zn 0Z0M0ZPZ Z0Z0Z0O0 PO0Z0Z0O ZBZQS0J0 a
c
rZ0l0j0s opZbapo0 0m0ZpZ0o Z0ZpO0Z0 0Z0Z0ZQZ Z0ZBZNZ0 PORA0OPO Z0S0Z0J0 a
2769 8
b
2771
0s0lbZkZ Z0l0apZp 0ZnopZpZ Zpm0Z0Z0 0Z0ZPO0Z ZPZ0ABO0 0ZPSNZQO ZNZRZ0J0 a
rZbl0j0Z Z0Z0Zpap pZnZ0mpZ Z0ZpZ0Z0 0o0Z0ZPZ Z0Z0ZPZ0 POPL0Z0O SNZNJBZR a
2768 8
Piece on a bad square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0ZkZ opZ0Z0o0 0Z0Z0o0m ZPo0o0ZR 0ZPZ0Z0Z Z0ZrZNOP PZ0Z0OKZ Z0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2773 8 7 6 5 4 3 2 1
2776
rZ0l0ZkZ o0ZbZpo0 0ZpZ0Zno Z0ApZ0Z0 0O0Z0Z0Z O0L0Z0OP 0Z0ZrOBZ Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2778
rZ0Z0skZ ZqZnapop pZRZpZ0Z ZpZpO0Z0 0Z0M0Z0Z ZPZ0O0ZP PAQZ0OPZ Z0Z0ZRJ0 a
c
rZbanZkZ Z0ZpZpop ponApZ0Z l0Z0Z0Z0 0MPZPZ0Z Z0OQZ0Z0 PZ0ZBOPO S0Z0ZRJ0 a
2775 8
b
2777
0j0s0Z0Z o0a0ZpZp 0o0Z0L0Z Z0o0Z0Z0 0ZPZ0Z0Z Z0Z0ZbO0 POBZ0OnO ZKZ0S0Z0 a
rZ0s0ZkZ Zpl0ZpZp 0Z0ZpZpZ oBa0O0Z0 PZ0AQO0Z Z0O0Z0Z0 0m0Z0ZPO S0Z0ZRJ0 a
2774 8
Piece on a bad square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0skZ Z0Zblpap 0Z0o0mpZ m0oPo0AP 0oPZPZPZ ZPZBZPZ0 rZNL0Z0Z ZRZNJ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2779 8 7 6 5 4 3 2 1
2782
bm0lka0s Z0o0Zpop 0Z0ZpZ0Z ZpZnM0Z0 0Z0OPZ0Z ZPo0Z0O0 0Z0Z0OBO ZNAQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2784
0Z0s0skZ ZpZ0s0op nM0Z0m0l A0ZpZpZ0 0Z0OpO0Z OPZ0O0O0 0Z0MQZ0O S0Z0ZRJ0 a
c
0Z0ZrZkZ Z0Z0Z0a0 0o0o0Zpo ZrZpZ0M0 0O0Z0Z0Z Z0Z0O0O0 PZ0Z0OBO Z0ZRZ0J0 a
2781 8
b
2783
0ZkZrZ0Z Z0o0Zpop pZ0s0Z0Z ZpZ0m0Z0 0O0ZQA0Z Z0O0Z0ZP PZ0Z0JPl SNZ0S0Z0 a
0Z0Z0Z0Z Z0Z0ZpZ0 0Z0Zpa0Z o0ZpZkop 0Z0O0Z0Z ArZ0O0O0 nONJ0O0O Z0ZRZ0Z0 a
2780 8
Piece on a bad square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0arZkZ ZnlbZpop pZ0o0Z0Z ZpZPZ0Z0 0Z0ZPo0Z ZPOBZNZP RZ0Z0OPZ SNZQZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2785 8 7 6 5 4 3 2 1
2788
rZ0l0Z0s opZ0Zpj0 0mpZbZ0Z Z0ZpZ0o0 0Z0OPM0a Z0MBZPZ0 PO0LKZ0Z Z0Z0Z0SR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2790
rZ0Z0ZkZ Z0l0aron pZ0o0Z0o mpZPo0Z0 0ZpZ0Z0Z Z0O0ZNMP PO0ZQOPZ S0ARZ0J0 a
c
rZbZrZkZ opZpo0mp 0Z0Z0opA Z0OPZ0Z0 0Z0Z0Z0Z Z0Z0Z0Z0 PZ0ZBOPO Z0S0ZRJ0 a
2787 8
b
2789
rZ0a0ZkZ Z0Z0Z0op poro0o0Z Z0ZNoPZ0 PO0ZPZQZ ZnA0S0OK 0ZqZ0Z0O Z0ZRZ0Z0 a
0Zks0Z0s opZnZpop 0ZpZpZ0Z Z0Z0Z0O0 PaBOPZnl Z0M0ZQZ0 0O0Z0ZPO S0A0ZRJ0 a
2786 8
Piece on a bad square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0akZ ZBZ0Zpo0 0Z0Zbo0o Z0s0Z0Z0 0ZnZ0Z0A Z0ZRZNZP PZ0Z0OPZ Z0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2791 8 7 6 5 4 3 2 1
2794
0Zrl0skZ Z0Z0Zpop pZ0Z0o0Z ZpaNZ0Z0 0Z0Z0Z0Z ZBZ0O0Z0 PmPZQOPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2796
rZ0Z0skZ opo0Z0Z0 0Z0a0o0o Z0o0o0o0 0Z0ZPZ0Z Z0ZPZPAP POPZ0OKZ S0Z0ZRZ0 a
c
bZ0l0skZ Z0ZrZpop pZ0ZpZ0Z mPOpZ0Z0 PA0Z0O0Z Z0Z0Z0O0 0ZRLNZBO Z0ZRZ0J0 a
2793 8
b
2795
rZ0ZrZkZ ZqZ0apo0 pZ0o0Z0o ZpZNo0Z0 PZnZPZPZ ZQO0Z0Z0 0O0Z0OPZ S0A0S0J0 a
rZ0Zka0s opl0Zpop 0ZnZpZ0Z Z0opO0Z0 0Z0Z0Z0Z Z0O0ZPAP POPL0O0Z Z0JRZBZR a
2792 8
Piece on a bad square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0lbsranj Z0Z0ZpZ0 po0o0OpZ Z0oPZ0Op PZ0ZPZ0O M0M0ZQA0 0O0Z0Z0Z S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2797 8 7 6 5 4 3 2 1
2800
0Zrs0ZkZ o0ZqZpap 0o0ZpZpZ Z0Z0O0ZP 0m0ObMQZ ZBZ0A0Z0 PZ0Z0OPZ Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2802
0Z0Z0Z0Z spZ0Z0Zp pM0ZnjpZ Z0O0ZpZ0 0ZBZ0O0Z Z0J0Z0Z0 PO0Z0ZPO Z0Z0Z0Z0 a
c
0Z0Z0m0Z ZpZ0Z0op 0Z0j0o0Z oBo0Z0Z0 0Z0ZPO0Z OPZ0J0Z0 0Z0Z0ZPO Z0Z0Z0Z0 a
2799 8
b
2801
0Z0Z0Z0Z o0Z0ZpZp 0spZrjpZ Z0SpZ0Z0 PZ0Z0Z0Z ZPS0Z0Z0 0ZPZ0OPO Z0Z0ZKZ0 a
0Z0j0ZrZ Z0ZnZ0Z0 0o0ZpZ0Z o0ZpO0Z0 PZ0OrZ0Z ZRO0ZKOR 0Z0Z0Z0Z Z0Z0ZNZ0 a
2798 8
Piece on a bad square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZqskZ opZbZ0ap 0ZnZ0opZ Z0Z0o0Z0 0Z0Z0ZnL O0M0ZNOB 0O0ZPO0O Z0ARJ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2803 8 7 6 5 4 3 2 1
2806
rZbZ0Z0j opZrZpo0 0Z0ZpZ0Z l0Z0Z0Z0 0Z0aBZ0Z Z0M0Z0Z0 POQZ0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2808
rZ0Z0skZ opZ0lpa0 0Zpo0ZnZ Z0Z0Z0Z0 0Z0OPObo ZBM0Z0Z0 PO0L0ZPA Z0ZRS0J0 a
c
rZ0lrZkZ opZ0Zplp 0Z0Z0ZpZ Z0Z0Z0Z0 0Z0Z0Z0Z Z0MnA0O0 PoQZ0OBO Z0ZRZRJ0 a
2805 8
b
2807
0Z0Z0ZkZ Z0Z0lpa0 0Z0Z0Z0o ZNo0o0o0 0mQZNZ0Z Z0Z0O0ZP rO0Z0OPZ Z0Z0ZRJ0 a
rZ0l0skZ opZnZpop 0Z0o0m0Z Z0oPZbZ0 0ZPZpZ0Z O0O0OPZ0 0Z0ZNZPO SBAQZRJ0 a
2804 8
Piece on a bad square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0Znj Z0ZRZpZp pZ0Z0ZpO ZpZ0o0Z0 0ZqZNmPZ ZNZ0ZPZ0 POPL0Z0Z Z0J0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2809 8 7 6 5 4 3 2 1
2812
0Z0lrZkZ ZrZbZpmp pZ0o0ZpZ m0oPZ0Z0 0ZPZ0O0Z Z0Z0O0Z0 PZQM0MBO Z0Z0SRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2814
0s0lrZkZ ZnZ0ZpZp 0Z0o0Zpa o0oPZbZn QZPZNO0Z Z0A0O0Z0 PZ0M0ZBO Z0Z0SRJ0 a
c
rZrZqZkZ o0Z0Zpop 0o0Zpm0Z O0Z0Z0Z0 nZPO0Z0Z Z0Z0ZNZ0 0Z0AQOPO S0ZRZ0J0 a
2811 8
b
2813
0ZrZ0Z0j o0ZpZrZp no0Z0opZ Z0lPo0Z0 0Z0ZPZQZ ZPZ0M0O0 PZ0Z0O0O Z0ZRZRJ0 a
rZ0Z0skZ Znlbapop pZ0o0m0Z ZpZPo0Z0 0ZpZPZ0Z ZPO0ZNMP PZBZ0OPZ S0AQS0J0 a
2810 8
Knight on the edge of the board
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lra0Z ZnZbZpZk 0Z0o0mpo ZpoPo0Z0 0Z0ZPZ0Z ZPO0ANMP 0ZBL0OPZ S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2815 8 7 6 5 4 3 2 1
2818
0s0Zqs0j onZ0m0ap 0o0obZpZ ZPo0opA0 0ZPZPZ0Z O0MPZ0O0 0Z0ZNOBO ZRL0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2820
0lrZ0Z0Z Z0Z0apj0 0o0ZpZps oPZpOnZp 0Z0O0O0Z mPZ0ZNOP 0Z0L0AKZ ZBZRZRZ0 a
c
nZ0lrZkZ ZpanZpop 0Z0o0Z0Z ZBZPo0Z0 0O0ZPZ0Z Z0L0Z0M0 0Z0A0OPO Z0S0Z0J0 a
2817 8
b
2819
0ZrZ0skZ ZbZna0op pm0Zpo0Z ZpZ0Z0Zq 0O0ZPA0Z O0ZBLNZP 0Z0ZNOPZ Z0S0ZRJ0 a
0sblnZkZ Z0Z0s0op pm0a0o0Z Z0oPo0Z0 Po0ZPZ0Z ZPZ0ZNZ0 0A0M0OPO Z0SQSBJ0 a
2816 8
Knight on the edge of the board
c
d
e
f
g
h
8 7 6 5 4 3 2 1
nsbZrZkZ ZpZnZpap pZ0o0ZpZ O0oPZ0A0 0Z0ZPONZ ZPM0Z0Z0 0Z0SBZPO Z0S0ZKZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2821 8 7 6 5 4 3 2 1
2824
0sbZrZka ZplnZpZp pm0o0ZpA Z0oPZ0Z0 PZ0ZPO0Z Z0M0Z0Z0 0O0oBMPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2826
0ZrZkZ0s o0mpapo0 qo0ZpZ0o Z0ZnO0Z0 0Z0ONZ0Z O0Z0ZNZ0 0OQA0OPO S0Z0S0J0 a
c
0s0Z0skZ Z0oqopZ0 0m0o0apo ZNZPZ0Z0 PO0MPZ0Z Z0Z0Z0O0 0Z0ZQOKZ S0Z0ZRZ0 a
2823 8
b
2825
0ZrZ0skZ o0Z0l0Z0 0mpZ0o0Z Z0MpZbop PL0OpZ0Z ZPZ0O0A0 0Z0Z0OPO Z0S0ZRJ0 a
0sblrZkZ Zpo0Zpa0 0m0Z0Zpo ZpZ0o0Z0 PZ0mNZ0Z Z0MPA0O0 0Z0ZPOBO Z0SQZRJ0 a
2822 8
Knight on the edge of the board
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0skZ Z0oqopZ0 0m0o0apo ZNZPZ0Z0 PO0MPZ0Z Z0Z0Z0O0 0Z0ZQOKZ S0Z0ZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2827 8 7 6 5 4 3 2 1
2830
rZ0s0ZkZ Z0Z0Znop pZpZ0ZnZ ZpZ0ZBZ0 0Z0O0Z0Z ZPZ0Z0ZP 0O0Z0ZPJ S0A0ZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2832
rZ0Z0skZ opZbZ0op 0l0Z0Z0Z Z0Zpm0Z0 0O0a0Z0Z O0Z0Z0ZP RZ0ZBOPZ Z0AQZRJN a
c
0lrZ0skZ Z0Zbapop pZ0o0m0Z mpZPo0Z0 0Z0ZPZ0Z Z0ZBANZP PO0MQOPZ S0Z0S0J0 a
2829 8
b
2831
rZbZrmkm o0l0Zpop 0opo0a0Z Z0Z0Z0MQ PZ0ZPO0Z Z0M0A0Z0 BOPZ0ZPO S0Z0ZRZK a
0ZrZ0skZ Zpl0apop 0m0o0Z0Z o0Z0m0O0 0Z0SPA0O ZNZ0Z0ZR POPZQZ0Z Z0J0ZBZ0 a
2828 8
Knight on the edge of the board
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zblrj0Z Z0Z0Zpm0 pZ0o0Z0M ZroPZ0Zp 0ZNaPOpZ S0Z0Z0On 0O0Z0ZQO Z0ABZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2833 8 7 6 5 4 3 2 1
2836
rZ0l0skZ opZ0Z0ap 0Z0oPmpm Z0Z0o0Z0 0O0ZpZ0Z Z0M0Z0Z0 PZ0ABOPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2838
rZ0Z0s0j M0ZqZ0Zp 0Z0o0m0a ZNoPZbZ0 0ZPZpZpZ S0Z0Z0Z0 PZ0ZBOPO Z0ZQZRJ0 a
c
0Z0ZrZ0Z o0ZqZ0Zk 0o0o0apo m0oPZpZn 0ZPZ0Z0Z Z0ZBZNZ0 POQA0OPO S0Z0Z0J0 a
2835 8
b
2837
rZ0Z0ZkZ MpZnZpap 0ZpZbZpZ Z0Z0o0Z0 0OPZPZ0Z Z0Z0APZ0 PZ0ZBZPO S0Z0Z0J0 a
0m0Z0s0j Z0o0Z0Z0 0ZPo0Zpa Z0ZNo0l0 0OBZPZ0o Z0Z0Z0ZP 0Z0ZQZPZ ZRZ0Z0J0 a
2834 8
Knight on the edge of the board
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZqskZ o0o0Z0a0 nZPobZpo Z0Z0o0Z0 0OBZpZ0Z ONZ0A0ZP 0Z0Z0OPZ S0ZQJ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2839 8 7 6 5 4 3 2 1
2842
0Z0Z0l0Z o0jrZ0Z0 PobZpZ0o Z0ZpO0oP 0ZpZ0ZPm Z0O0Z0Z0 0ZPZQO0Z S0A0Z0JB a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2844
rZ0mrakZ Z0ZqZpon pZ0o0Z0o ZpZPo0Z0 0O0Z0Z0Z O0ZPA0ZP BZ0M0OPZ Z0SQS0J0 a
c
rZ0l0skZ obZ0opap 0onZ0mpZ Z0Z0Z0Z0 0ZBO0Z0Z O0M0ZNZP 0O0Z0OPZ S0AQS0J0 a
2841 8
b
2843
0Z0ZqZkZ o0Z0Z0a0 0o0ZpZpo Z0Z0Z0Z0 0ZQZ0O0Z Z0Z0Z0O0 PO0Z0ZBO Z0Z0m0J0 a
rZ0ZrZ0Z m0Zblpak pZ0o0mpo ZpZPo0Z0 0Z0ZPZ0Z ZPZ0ANMP PZBL0OPZ Z0ZRS0J0 a
2840 8
Knight on the edge of the board
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ opZbZpZp 0Z0Z0ZpZ Z0ZqZ0A0 nZpO0Z0Z Z0O0ZPZ0 PZQM0ZPO Z0Z0SRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2845 8 7 6 5 4 3 2 1
2848
rZ0ZrZkZ opZ0lpop 0ZbZ0m0Z m0ZpZ0Z0 0Z0O0M0Z O0ZBOPZ0 QZ0A0ZPO ZRZ0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2850
rsnZ0ZkZ Z0lbapop pZ0o0m0Z ZpoPo0Z0 PZ0ZPZ0Z Z0O0ZNMP 0OBZ0OPZ S0AQS0J0 a
c
rZqZ0skZ ZpZ0opap pZ0o0ZpZ m0oPZ0Zn 0ZPZPZ0Z ZPM0Z0Ob PAQM0OBO Z0Z0SRJ0 a
2847 8
b
2849
rm0lkZ0s o0Z0apop 0oPZpm0Z Z0ZpZ0Z0 0O0O0Z0Z Z0M0Z0Z0 PZ0Z0OPO S0AQJ0MR a
rm0l0ZkZ o0Z0Zpo0 bZ0Z0a0o Z0ZpM0Z0 0Z0O0A0Z O0Z0Z0Z0 0ZBZ0OPO ZRZRZ0J0 a
2846 8
Knight on the edge of the board
c
d
e
f
g
h
8 7 6 5 4 3 2 1
nZ0l0ZkZ Z0s0ZpZ0 pZ0o0OpZ ZpZPZ0Zp 0ZPZ0L0Z ZPZ0Z0ZB 0Z0Z0Z0O Z0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2851 8 7 6 5 4 3 2 1
2854
0Zrl0skZ Z0Z0opap 0mno0ZpZ ZpZ0Z0Z0 pZ0OPZ0Z OPZ0AQZ0 0ZBZ0OPO M0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2856
rZ0Z0s0j ZpZ0Z0op 0ZnZ0m0Z Z0ZBZ0Z0 pa0Z0ObZ Z0M0A0O0 PO0Z0Z0O M0J0ZRZR a
c
0Z0s0ZkZ obo0Zpop 0Z0Z0m0Z ZNZ0a0Z0 PZqZPZ0Z Z0MrZPZ0 0O0Z0LPO S0A0ZRZK a
2853 8
b
2855
rZnlrZkZ ZpZ0apop 0Z0Z0m0Z ZPOpZ0Z0 pZ0Z0Z0Z Z0Z0ANZ0 0OPL0OPO M0JRZ0ZR a
0Z0Z0Z0Z Z0ZqZ0ak 0o0ZbZpo Z0onZpZ0 0Z0o0Z0O Z0ZPZBO0 0OQAPO0Z M0Z0Z0J0 a
2852 8
Knight on the edge of the board
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbs0ZkZ Zpl0Zpo0 pZ0ZpZ0o m0ZPZ0Z0 0ZPM0Z0Z Z0Z0Z0O0 PL0Z0OBO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2857 8 7 6 5 4 3 2 1
2860
rZ0Z0skZ Z0l0a0on pm0Z0o0o ZpZ0oPZ0 0ZpZ0ZPO Z0O0ZNZ0 POBZ0O0Z S0AQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2862
0Z0lrZkZ Z0ZrZpZp nZbo0ZpL o0Z0o0Zn PoPZPZ0Z ZPZ0MNZP 0ZBZ0OPZ Z0ZRS0J0 a
c
0ZrZ0lkZ Zbl0apop pZ0o0Z0Z mpZPZ0Z0 0Z0ZPo0Z Z0Z0ZNZP POBZROPZ S0ZQZNJ0 a
2859 8
b
2861
0Z0Z0ZkZ m0ZqZpan ro0o0ZpZ Z0oPo0Zp PZPZPZ0O ZQM0M0O0 0Z0A0OKZ ZRZ0Z0Z0 a
0Z0Z0ZkZ o0Z0Zpa0 0Z0s0Zpo ZqZ0Z0Z0 NZ0Z0Z0Z Z0Z0Z0Z0 POQZ0OPO Z0S0Z0ZK a
2858 8
Knight on the edge of the board
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0ZkZ Z0ZbaqZp 0Z0ZpZpZ ZpZpA0Z0 nZ0Z0O0O Z0ONLBZ0 0O0Z0ZPZ Z0ZRZ0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2863 8 7 6 5 4 3 2 1
2866
rZ0Z0Z0s opZnjpop 0ZbMpm0Z l0Z0Z0A0 0ZBZPO0Z Z0O0Z0Z0 PZ0L0ZPO S0Z0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2868
rZ0Z0skZ Z0ZqZpop nZ0MpZ0Z o0OpZ0Z0 0O0Z0Z0Z O0Z0Z0Z0 0Z0L0OPO S0Z0ZRJ0 a
c
rm0l0skZ opm0Z0op 0Z0Z0ZbZ Z0ZpOpM0 0Z0O0Z0Z Z0MBZ0ZP PO0L0ZPZ Z0S0ZRJ0 a
2865 8
b
2867
rZ0ZrmkZ opZblpop 0Zpo0Z0Z Z0Z0Z0Z0 0OPO0Z0Z Z0MBO0Z0 PZQZ0ZPO Z0Z0SRJ0 a
rZ0Zqs0j o0Z0Zbo0 0o0Z0Zno Z0opOpZ0 0a0O0O0Z Z0M0Z0OP POQZBZ0Z ZKZRZNS0 a
2864 8
Knight on d6, e6 or d3, e3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
bZrZrZkZ Z0Znl0o0 0ZpZpo0o o0O0Z0Z0 Po0O0LNO Z0Z0Z0O0 0O0Z0O0Z Z0SRZBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2869 8 7 6 5 4 3 2 1
2872
rZ0sbZkZ ZpZnlpZp pZpZpZpZ Z0O0M0Z0 0Z0OBO0Z ZPZ0Z0Z0 PZ0ZQZPO Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2874
rZ0s0Z0Z Z0Znl0jp pZpZ0opZ Z0Obo0Z0 0ONZ0Z0Z O0Z0L0Z0 0Z0ZBOPO Z0SRZ0J0 a
c
rmbZ0ZkZ opZ0ZpZp 0ZpZ0ZpZ Z0Z0s0Z0 0Z0ZPZ0Z ZPM0Z0Z0 0O0ZBOPO S0Z0ZRJ0 a
2871 8
b
2873
rZ0Z0Z0Z oplbZ0ak 0ZpMrmpo Z0O0o0Z0 0Z0Z0Z0Z Z0Z0ZNOP POQZ0OBJ Z0ZRS0Z0 a
0Z0s0ZkZ opZ0l0o0 0ZpZ0obo Z0Orm0Z0 0ONZpZ0Z Z0Z0Z0O0 PL0SPOBO Z0ZRZ0J0 a
2870 8
Knight on d6, e6 or d3, e3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ ZbZ0Zpap pZpZ0ZpZ Z0Ono0Z0 qo0Z0Z0L Z0Z0ANZP PO0ZBOPZ Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2875 8 7 6 5 4 3 2 1
2878
0Z0s0ZkZ opZ0lpa0 0ZpZ0ZnZ Z0Z0obo0 0ZPZNZ0o O0Z0OPZ0 0O0ZBZPO Z0L0ARJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2880
rZbZkm0s opZqZ0a0 0ZpZ0ZnZ Z0O0ZpZp 0ZBZpMpO ZQM0O0Z0 PO0Z0OPZ S0A0J0ZR a
c
rZ0ZrZkZ Z0lnZpa0 0opZ0mpo Z0O0obZ0 0O0Z0Z0A Z0M0O0Z0 0Z0MBOPO Z0LRZRJ0 a
2877 8
b
2879
rZbZ0Z0s ZpjnZpap pZpZ0ZpZ Z0Z0o0Z0 0ZPZ0Z0Z M0M0Z0O0 PO0SPOBO Z0J0Z0ZR a
0Z0srmkZ Zbl0ZpZ0 0opZpZpZ o0O0Z0Mp 0O0O0Z0O Z0Z0Z0Z0 PZQZ0OPZ ZBZRS0J0 a
2876 8
Knight on d6, e6 or d3, e3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZbskZ opZ0ZpZp 0Zpl0ZpZ Z0Z0M0Zn 0ZPO0Z0Z ZBZ0S0ZP PL0Z0OPZ Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2881 8 7 6 5 4 3 2 1
2884
0s0Z0skZ o0l0Z0Z0 bZpMpZpZ Z0o0OpZp 0ZPZ0O0O ZPLRZ0O0 PZKZ0Z0Z Z0ZRZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2886
rZbZrmkZ ZpZ0lpop 0ZpZ0m0Z Z0Opo0Z0 0Z0O0ZPZ ZPM0O0MP 0Z0L0OBZ Z0Z0SRJ0 a
c
rZ0ZrmkZ o0Z0Zqop 0ZpZpo0Z Z0O0ZnZ0 0ZQZNZ0Z Z0Z0ZNZ0 PO0Z0OPO S0Z0S0J0 a
2883 8
b
2885
rZbZrZkZ opm0Z0lp 0Zpo0Z0Z Z0Z0Z0Zn 0OPZ0o0Z Z0MBZPZ0 PZ0LNZPO ZRZ0ZRJ0 a
bZrZ0skZ o0Z0apop 0ZpZpZ0Z l0OnM0Z0 0Z0O0A0Z Z0Z0Z0O0 PZQZ0OBO S0ZRZ0J0 a
2882 8
Knight on d6, e6 or d3, e3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rl0Z0skZ Z0Znopap 0Z0o0ZpZ ZboPZ0Z0 0Z0ZPA0Z O0Z0ZNO0 0O0Z0OBO ZRZQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2887 8 7 6 5 4 3 2 1
2890
rs0Z0ZkZ Z0Znopa0 qZ0o0m0o Z0oPZ0o0 0Z0ZPZ0Z Z0M0ANZ0 POQZ0OPO ZRZ0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2892
rZ0l0skZ ZpZnZpan pZ0o0Zpo Z0oPZ0Z0 PZ0ZPOPO Z0M0ZBZ0 0O0Z0J0Z S0AQZ0ZR a
c
rZrZ0ZkZ Z0ZnopZp qZ0o0ZpZ Z0oPZ0Z0 0Z0aPO0Z OPMnM0Z0 0ZQA0ZPO ZRZ0ZRZK a
2889 8
b
2891
0Z0ZrZkZ Z0snZpan pZ0o0Zpo Z0ZPZ0Z0 0lpZPOBO Z0M0Z0A0 0OQZ0ZPZ Z0Z0SRJ0 a
rZbZ0Z0s Z0lkZ0op 0Z0Mpo0Z o0Z0O0ZB 0oPo0Z0Z A0Z0Z0O0 PO0ZQZ0O Z0J0Z0ZR a
2888 8
Knight on d6, e6 or d3, e3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rs0Z0ZkZ Z0Z0Zpap 0Z0o0mpZ Z0oPZ0Z0 PZ0mPZ0Z Z0M0Z0Z0 0O0Z0O0O S0ABZKZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2893 8 7 6 5 4 3 2 1
2896
0Z0s0skZ Z0Z0Zbop 0o0Z0l0Z oQZpm0Z0 0Z0MpZ0Z OPZ0O0O0 0Z0Z0OBO Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2898
rl0Z0s0j ZpZbZ0Zp 0ZnZpZpO ZNZ0OpZ0 pOpO0O0S O0Z0A0Z0 0Z0Z0ZPZ Z0SQJ0Z0 a
c
rZ0Z0Z0j opZ0ZrZp 0l0oNmna Z0ZPo0Z0 QZ0ZPo0Z Z0ZNZPZb PO0ABS0O Z0S0Z0J0 a
2895 8
b
2897
rZbl0skZ opZ0m0a0 0ZpZ0Z0o ZNOPo0o0 0ZNZPo0Z A0Z0ZPZ0 PZ0ZQZPO S0Z0ZRJ0 a
0Z0ZrskZ ZpZ0l0ap pZ0o0ZpZ Z0ZPm0Z0 PZ0M0A0Z ZPZ0Z0ZP 0Z0L0ZPZ Z0ZRS0J0 a
2894 8
Knight on d6, e6 or d3, e3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZ0Z o0Z0l0j0 0o0o0mpZ Z0oPo0Mp 0Z0ZPZ0Z ZPZPZ0O0 PZ0Z0LKO Z0Z0ZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2899 8 7 6 5 4 3 2 1
2902
rmbZ0ZkZ opoqZrZp 0Z0oNmpZ Z0ZPo0Z0 0ZPZ0Z0Z Z0MBZPO0 PO0Z0Z0O S0L0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2904
0s0Z0skZ m0l0a0op 0m0o0o0Z o0ZPoNZ0 0Z0Z0Z0Z A0OQZNZP PZ0Z0OPZ ZRZ0S0J0 a
c
0Z0ZrZkZ Zbo0l0ap 0o0o0ZpZ Z0ZPZpZ0 0OPMBO0Z Z0Z0L0M0 0Z0Z0Z0O Z0Z0ZRZK a
2901 8
b
2903
rm0Z0ZkZ obZ0s0Z0 0o0oNl0o Z0oPZPo0 0Z0ZBZ0Z Z0O0Z0O0 PZ0L0Z0O S0Z0ZRJ0 a
0ZrZ0ZkZ Znl0Z0ap pZ0o0Z0Z OpoPorZ0 0O0Z0Z0Z Z0O0ANZP 0Z0Z0O0J S0ZQS0Z0 a
2900 8
Knight on d6, e6 or d3, e3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0lnakZ o0Z0s0Zp 0Z0o0ZpZ Z0oPo0M0 0ZPZ0Z0Z O0Z0Z0ZQ 0Z0A0OPO ZRZ0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2905 8 7 6 5 4 3 2 1
2908
0sqZ0Z0Z Z0Z0okZp ps0oNZpZ ZpoPm0Z0 0ZPZ0Z0Z ZPZ0Z0O0 PZQZ0O0O ZRZ0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2910
0ZrZnZ0Z opZ0Zrj0 0Z0o0apo Z0ZPZ0Z0 0Z0ZNM0Z ZPZKZ0Z0 PZ0Z0ZPO Z0ZRZRZ0 a
c
0Z0sra0j Z0o0ZqZ0 pZ0Z0o0Z ZpOPZPZp 0O0Z0opZ Z0Z0ZNZ0 0ZQS0OPO Z0ZRZ0ZK a
2907 8
b
2909
0s0l0s0Z opo0Z0ak 0Z0o0Z0o ZPZPmpob PZ0Z0Z0Z AQZ0O0O0 0Z0ZNOBO ZRZRZ0J0 a
0ZrZka0s Z0ZnZpop pZ0ZbZ0Z ZpZ0Z0Z0 0ZpMPZ0Z Z0M0APZ0 PO0Z0ZPO S0ZRZ0J0 a
2906 8
Knight on d6, e6 or d3, e3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0skZ Z0Z0Z0o0 0Z0l0o0o o0Z0aPZ0 Po0Z0M0Z ZPZ0Z0Z0 0O0Z0LPO ZKZ0S0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2911 8 7 6 5 4 3 2 1
2914
0Zrl0Z0j obZ0Z0op nopZ0o0Z Z0Z0ZPZ0 0Z0O0Z0Z ZQONo0O0 PZ0Z0ZBO Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2916
rZ0Z0ZkZ obZ0Z0on 0ZpS0o0o l0Z0ZPZ0 No0MrZPZ ZPZ0Z0L0 PZPZ0Z0Z ZKZ0Z0ZR a
c
0sbZrZ0Z o0ZnZpj0 0mpo0ZpZ lpZ0o0Op 0Z0OPO0O O0M0Z0Z0 0OPL0M0Z ZKZRZBZR a
2913 8
b
2915
0Z0Z0Z0j Z0Z0s0Zp pZrZNopZ ZpZ0aPZ0 0ZnA0ZPZ Z0O0Z0Z0 PZ0ZRZ0O Z0Z0S0ZK a
0s0sbZkZ o0l0Zpo0 0ZpZpm0o Z0O0M0Z0 0Z0O0Z0Z Z0ZBL0O0 PZ0Z0O0O ZRZ0ZRJ0 a
2912 8
Knight on d6, e6 or d3, e3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
qZrarZkZ Z0ZnZpop 0Z0Z0m0Z O0ZpZ0Z0 0ZpZ0Z0Z O0A0ONZ0 0Z0ZQOPO ZNSRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2917 8 7 6 5 4 3 2 1
2920
0ZrZ0s0j ZpZ0ZpZp pZ0o0apZ Z0ZQl0Z0 0OPZPZ0Z Z0Z0Z0Z0 PZ0ZBZPO Z0S0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2922
rZ0lrZkZ Z0Z0Z0Zp pZpZbopZ Z0ZpZ0Z0 0Z0Z0Z0O O0A0Z0L0 0O0Z0OPZ Z0ZRZRJ0 a
c
0s0a0skZ ZpZ0Zpop 0Z0o0Z0Z o0ZNoPZ0 Pm0ZPZPO ZPZ0Z0Z0 0O0JBZ0Z Z0S0Z0ZR a
2919 8
b
2921
rZblrZkZ o0o0Z0op 0ZpZ0o0Z Z0ApO0Z0 0Z0Z0O0Z Z0Z0Z0Z0 POPZQZPO S0Z0ZRJ0 a
0ZrZ0ZkZ ops0Z0o0 0l0Zpa0o Z0ZpZ0Z0 0Z0Z0Z0Z Z0Z0O0Z0 PO0SBOPO ZQZ0ZRJ0 a
2918 8
Opposite coloured bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0a0Z Zpj0Z0Z0 0o0oBO0o Z0ZRZ0Z0 0Z0Z0O0o Z0Z0S0Z0 POPZ0s0Z Z0J0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2923 8 7 6 5 4 3 2 1
2926
0ZrZ0ZkZ Z0Z0o0ap pZ0o0ZpZ Z0mPZpZP 0ZPZ0OPZ Z0ZKABZ0 PZ0Z0Z0Z Z0Z0Z0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2928
rZbZ0ZkZ opZ0apop 0Z0ZpZ0Z s0Z0Z0Z0 0Z0O0Z0Z Z0M0A0Z0 PO0Z0OPO Z0SRZ0J0 a
c
rs0Z0AkZ Z0ZbZpZp pZ0Z0OpZ Z0Zpo0Z0 pZPZPZ0L O0Z0Z0Z0 0Z0l0ZPO S0Z0ZRZK a
2925 8
b
2927
0Z0ZrZkZ Z0o0lpop pZborZ0Z A0o0Z0Z0 0ZPZPZ0Z OPZ0ZPZ0 0Z0L0ZPO ZRZ0S0J0 a
rZ0ZqskZ obZ0Z0op 0Z0Spo0Z SpZ0Z0Z0 0Z0Z0O0Z ZPZ0Z0Z0 0OPZ0ZPO Z0AQZ0ZK a
2924 8
Opposite coloured bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Zrs Z0Z0j0Zp 0Z0opo0Z o0l0a0Z0 0o0ZPZ0Z Z0ZQZBO0 POPZ0Z0O ZKZRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2929 8 7 6 5 4 3 2 1
2932
0Z0s0s0Z Z0l0Zpj0 0ZpZ0apZ opZ0Z0Zp 0Z0Z0Z0Z OBO0ZQZ0 0O0Z0OPO Z0JRS0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2934
rZ0Z0s0Z l0Z0m0a0 pZpLBo0j Z0Z0oPoP 0Z0Z0ZPZ O0M0Z0Z0 0O0Z0Z0Z Z0JRS0Z0 a
c
0ZRZ0akZ ZpZ0Z0Zp 0Z0l0ZpZ sBZPo0Z0 0Z0ZPZ0Z Z0Z0Z0Z0 0Z0Z0ZPO Z0Z0ZQJ0 a
2931 8
b
2933
rZ0l0skZ opZ0Zpo0 0ZbZ0Z0Z Z0ZpL0Z0 0Z0Z0Z0Z Z0Z0Z0Z0 PO0Z0OPO S0Z0S0J0 a
0Zrs0Z0j ZqZ0Z0ap 0Z0o0Z0Z Z0Z0Z0o0 0OPo0o0Z ZRZ0ZPZ0 0Z0LBZPO Z0ZRZ0ZK a
2930 8
Opposite coloured bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0srm0a0Z ZpZ0l0jp 0A0Z0opZ Z0o0o0Z0 PZBZPm0Z Z0Z0ZNZP 0OQZ0OPZ Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2935 8 7 6 5 4 3 2 1
2938
0s0Z0s0j Z0Z0Zpa0 0ZpZ0Z0o o0o0Z0o0 0ZBZPO0l ZPZ0Z0SP PZ0ZQZPJ Z0Z0ZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2940
0Z0a0Z0Z s0Z0Zpjp PZ0l0ZpZ Z0o0Z0Z0 0Z0o0Z0Z ZPZBZ0ZP 0Z0Z0OPZ S0Z0L0J0 a
c
0s0Z0skZ Z0Z0Zpop 0ZQZ0Z0a o0Z0o0Z0 0ZPZPZ0O Z0Z0Z0OB 0OqZ0O0Z Z0ZRZRJ0 a
2937 8
b
2939
0ZbZ0skZ ZpZ0Z0a0 0l0o0Z0o o0mPo0o0 0Z0ZNZ0Z Z0Z0Z0OP POQZ0ZPJ Z0ZRSBZ0 a
0s0s0ZkZ Z0L0Zpa0 0Z0o0ZpZ opZQs0Z0 0Z0ZPZ0Z O0O0Z0OB 0O0Z0O0Z S0Z0ZRJ0 a
2936 8
Opposite coloured bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0l0skZ Z0Z0apop 0Z0o0Z0Z o0sPo0Z0 BZ0Z0Z0Z Z0OQZ0Z0 0O0Z0OPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2941 8 7 6 5 4 3 2 1
2944
0Z0Z0s0Z l0Z0Zrjp pZ0obZpZ ZpZNo0a0 0O0ZBZ0Z O0ORZ0L0 0Z0Z0OPO Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2946
rZbZ0skZ opZ0Z0Zp 0Z0ZpZpl Z0ZpO0Z0 0OnA0Z0O Z0OBZ0L0 PZ0Z0ZPZ S0Z0J0ZR a
c
rZbZ0ZkZ opZ0Z0Zp 0Z0ZpspZ l0ZpZ0M0 0ZpmnZ0Z O0O0Z0Z0 0ZPABOPO S0Z0LRJ0 a
2943 8
b
2945
rZbZ0skZ ZpZ0apop pZ0o0Z0Z l0ZPo0Z0 0Z0A0O0Z ZBZ0Z0Z0 POPZQZPO Z0JRZ0ZR a
0Z0s0ZkZ ZQZ0Zpo0 pZ0ZqZ0o Z0Z0ZbZ0 0a0Z0Z0O Z0M0A0O0 0O0Z0O0Z S0Z0Z0J0 a
2942 8
Opposite coloured bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lrZkZ o0o0Z0o0 0opZbZ0A Z0Z0Z0ZQ 0Z0Z0Z0Z Z0OPZ0O0 PZ0Z0O0O S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2947 8 7 6 5 4 3 2 1
2950
0ZrZ0s0j Z0ZqZ0ap pZ0o0Z0Z Z0ZBopZ0 0Z0ZPo0L ZPZ0Z0Z0 PZRZ0OPO Z0ZRZKZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2952
0ZrZkZ0s Zpo0Z0Zp 0o0Z0ZqZ Z0ZpObZ0 0Z0Z0Z0Z L0Z0Z0A0 PZ0Z0ZPO S0Z0ZRJ0 a
c
0ZrZ0skZ ZpZ0ZqZp pO0ZpZ0Z Z0ZpOpZ0 0ObA0L0Z O0Z0Z0Z0 0Z0Z0ZPO SRZ0Z0J0 a
2949 8
b
2951
0a0Z0skZ s0Z0Zpo0 pZQZpl0o ZpZ0Z0Z0 0Z0Z0Z0Z ZPZ0O0O0 PZ0ZBO0O Z0SRZ0J0 a
rZ0Z0Z0j Z0oqZrap 0o0o0Z0Z o0ZPZ0S0 PZPZBo0O ZPZ0ZPZ0 0Z0Z0ZQZ Z0J0Z0S0 a
2948 8
Opposite coloured bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
BZ0Z0ZkZ Z0Z0Zpop pZ0o0Z0Z l0Z0ZPa0 0o0L0Z0Z Z0Z0Z0Z0 POPZ0ZPO ZKZRs0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2953 8 7 6 5 4 3 2 1
2956
0s0Z0Z0Z ZqZ0opj0 0Z0o0a0o ZpZ0Z0Z0 0L0Z0Z0O ZPZ0O0Z0 PZRZBO0Z Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2958
0Z0lrZkZ Z0Z0Zpap QZ0o0mpZ Z0ZPZ0Z0 0o0Z0O0Z Z0Z0Z0O0 PZ0ZPZBO Z0Z0SNJ0 a
c
rZ0ZrZkZ o0Z0lpZp 0Z0Z0ZpZ Z0oPZPZ0 0o0aBZPZ Z0Z0Z0ZP POPZ0ZQZ Z0JRS0Z0 a
2955 8
b
2957
0Z0s0ZkZ o0Z0Lpop 0Z0ZpZ0Z lpZ0Z0Z0 0Z0ZPa0Z ZBZ0Z0Z0 POPZ0ZPO ZKZ0ZRZ0 a
BZ0Z0skZ o0Z0Zpop Qo0ZpZ0Z Z0Z0Z0Z0 0ZPZ0Z0Z Z0Z0Z0O0 PZ0l0O0O a0Z0ZRJ0 a
2954 8
Opposite coloured bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0s0j Z0Z0apo0 pZ0Z0Z0o ZpZPZ0ZR 0Z0o0Z0Z O0ZBl0ZQ 0OPZ0ZPO Z0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2959 8 7 6 5 4 3 2 1
2962
0Z0Z0Z0Z o0Z0Z0a0 rZ0Z0Z0j Z0Z0Z0lp 0ZPo0Z0Z Z0ZQZ0OB 0Z0ZRO0Z Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2964
0ZrZ0ZkZ o0ZbZ0op 0lpZro0Z Z0SpZ0Z0 0O0O0Z0Z O0Z0Z0AP 0Z0L0OPZ Z0Z0ZRJ0 a
c
rZ0s0ZkZ ZpZ0lpZp pZ0o0apZ Z0ZPZ0Z0 PZPZRZ0Z ZPZBZ0L0 0Z0Z0ZPO Z0S0Z0ZK a
2961 8
b
2963
0Z0Z0ZkZ o0ZqZrZp 0ZbZrZpZ Z0ZpApZ0 0o0O0L0O Z0Z0S0S0 PO0Z0OPZ Z0Z0Z0J0 a
0ZRZ0a0Z orZqZ0jp 0Z0o0ZpZ Z0ZPo0O0 0Z0ZBZQZ ZPZ0O0Z0 PZ0ZKZ0Z Z0Z0Z0Z0 a
2960 8
Opposite coloured bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0ZkZ Z0Z0ZpZp 0Z0ZpZpZ Z0ZpZ0Z0 0Z0ZqZ0O O0A0Z0S0 0ZbL0OPZ Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2965 8 7 6 5 4 3 2 1
2968
rZ0Z0ZkZ o0ZqZrZp 0o0ZpZpO Z0ZbA0Z0 0Z0OpZ0Z Z0O0Z0L0 PZ0ZROPZ Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2970
0s0ZkZ0s Z0Z0Zpap 0l0opo0Z Z0o0Z0Z0 0ZQZPO0Z ZBZ0Z0Z0 PO0Z0ZPO Z0JRZRZ0 a
c
0Z0Z0skZ ZpZ0ZpZp pZ0a0ZpZ Z0ZPZ0Z0 PZ0l0Z0Z Z0ZBs0Z0 0OPZ0LPO Z0Z0SRZK a
2967 8
b
2969
0Z0ZrZkZ l0Z0Zpop 0Z0o0Z0Z Z0ZPZ0O0 0o0Z0L0O ZPaPZ0Z0 0Z0Z0ZBZ Z0Z0ZRZK a
rZ0Z0Z0Z Z0o0lrok 0Z0ZbZRo o0ZpApZP 0Z0ZpL0Z O0Z0Z0Z0 0OPZ0OPZ Z0JRZ0Z0 a
2966 8
Opposite coloured bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZkZ l0Z0Z0Zp ps0a0o0Z Z0Z0ZBZ0 0oRZ0O0Z ZPZ0Z0ZP 0ZQZ0ZPZ Z0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2971 8 7 6 5 4 3 2 1
2974
0Z0srZkZ opZnZpZ0 0ZpZpZpa Z0Z0Z0Zp 0ZPO0Z0O ZPZ0Z0O0 PA0Z0O0Z Z0ZRSBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2976
rZbZ0skZ ZpZ0Z0a0 pZpo0l0o Z0Z0o0ZQ 0OPZ0o0M Z0ZPZ0O0 PZ0Z0OBO ZRZ0ZRJ0 a
c
rmbZkZ0s opZ0Zpop 0Z0ApZ0Z ZPZ0Z0Z0 0Z0ZnZ0Z O0Z0ZNZ0 0Z0ZPOPO S0Z0JBZR a
2973 8
b
2975
0Zbs0ZkZ Z0Z0Z0ap pZpo0ZpZ Z0Z0Z0Z0 0APZNZ0Z Z0ZKZPZ0 PZ0Z0ZPO ZRZ0Z0Z0 a
0sbZ0s0j Z0Z0Z0ap 0Z0m0Z0Z ZpZ0oPZ0 0Z0Z0Z0Z Z0l0Z0Z0 PoBMQOPZ ZKZRZ0MR a
2972 8
A Pair of bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZkZ opZbZ0ap 0Z0o0ZpZ Z0oPZpZ0 0ZPZnO0A ZPZ0S0ZP PZ0ZNZPJ Z0ZNZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2977 8 7 6 5 4 3 2 1
2980
rZ0s0ZkZ ZbZ0Zpop 0Z0Z0m0Z o0Z0o0Z0 Po0ZPZ0Z ZBZ0ZPZP 0O0Z0ZPZ S0A0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2982
0Z0srakZ Z0Z0ZbZp 0ZqZ0opZ opZ0o0Z0 0Z0oPZ0Z OPZQZNOP 0APZ0O0Z S0Z0S0J0 a
c
rZbs0Z0Z opZ0jpop 0Z0Mpm0Z Z0m0Z0Z0 0Z0ZPZ0Z O0A0ZPZ0 0O0Z0ZPO Z0ZRJBZR a
2979 8
b
2981
rZ0ZrZkZ Zponlpop 0Z0o0Z0Z o0Z0Z0Z0 0ZPZnZ0Z A0Z0Z0O0 PO0ZPOBO Z0SQZRJ0 a
rZ0Z0mkZ ZbZ0s0op 0opZ0Z0Z o0ZpO0Z0 PZ0Z0Z0Z ZPZ0S0O0 0APZ0ZBO Z0Z0S0J0 a
2978 8
A Pair of bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0ZkZ Zplbmpop pZnZpZ0Z Z0Z0Z0Z0 0ZBZPO0Z ZNL0A0Z0 PO0Z0ZPO Z0S0ARJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2983 8 7 6 5 4 3 2 1
2986
0snZ0skZ Zpl0Zpop pZ0a0Z0Z Z0Z0Z0S0 PZpO0Z0Z Z0L0Z0ZP 0ABZ0OPZ Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2988
rZ0Z0mkZ opZrZbop 0ZpZ0o0Z Z0Z0Z0Z0 nZPO0Z0Z ONZ0Z0A0 0Z0Z0OPO Z0S0SBJ0 a
c
0lrZra0j obZ0Z0op 0o0Z0o0M mNZ0Z0Z0 0ZpZ0Z0Z Z0Z0ZQZ0 PA0Z0OPO ZBSRZ0J0 a
2985 8
b
2987
rZ0ZrZkZ obZ0Zpo0 0ZpZ0Z0o ZpapM0Z0 0Z0Z0O0Z ZBOPZ0Z0 PO0Z0ZPO S0Z0ZKZR a
0Z0Z0Z0Z ZpZnjpap pZ0o0mpZ Z0oPZ0Z0 PZPZ0A0Z Z0M0Z0ZP 0O0Z0OPZ Z0ZBZ0J0 a
2984 8
A Pair of bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZnZ0Z0s Zbs0Zko0 pZ0Z0o0Z Z0Z0o0Zp NZ0Z0m0O Z0ZBZPZ0 0OPS0ZPZ ZKZRZ0A0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2989 8 7 6 5 4 3 2 1
2992
rZ0Z0ZkZ o0Z0Zpap 0ZqZbZpZ L0A0o0Z0 0Z0o0Z0Z Z0ZRZPZ0 POPZ0ZPO Z0J0S0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
2994
0Z0Z0ZrZ o0Z0okZ0 0onZ0mpZ Z0o0Z0A0 0ZPZ0O0O Z0OBZ0S0 PZKZ0Z0Z Z0Z0Z0Z0 a
c
rZ0Z0Z0Z oponjpZp 0ZpZbmpZ O0M0o0Z0 0Z0ZPZ0Z Z0Z0APZP 0OPS0ZPZ Z0ZRZBJ0 a
2991 8
b
2993
0s0Z0ZkZ Z0ZbZpa0 pZ0Z0Zpo l0oPZ0Z0 0ZpZNZ0Z Z0Z0LPZ0 PO0S0ZPO ZKZ0Z0ZR a
rZbZkZ0s opZ0Zpop 0Z0ZpZ0Z m0Z0Z0Z0 0Z0Z0Z0Z O0O0A0O0 0Z0ZPO0O ZRZ0JBZR a
2990 8
A Pair of bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZrZ0Z0Z opl0ZkZ0 0Zpo0Zpo Z0Z0onZ0 0OPABZ0O Z0Z0Z0O0 PZ0L0O0Z ZRS0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
2995 8 7 6 5 4 3 2 1
2998
0Z0Z0AkZ Z0Z0Zpo0 0ZbMpZ0o Z0a0OPZ0 pZ0Z0Z0Z Z0Z0Z0ZP RZ0ZQZPJ Z0l0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3000
0Z0s0ZkZ ZpZ0ZpZp ro0obZpZ Z0o0Z0Z0 PZPZnZ0Z ZPA0Z0Z0 RZ0ZBOPO Z0ZRZ0J0 a
c
0ZrZ0j0Z Z0obZrZp 0Z0o0ZpZ opmPZ0Z0 0ZPA0o0Z ZPZ0ZPZ0 PZBJRZPO Z0Z0S0Z0 a
2997 8
b
2999
rZ0Z0skZ ZpZ0Z0op nZbZpl0Z Z0o0mpZ0 0ZPZ0M0Z OPL0APO0 0Z0Z0ZBO Z0ZRZRJ0 a
0s0l0s0j Z0Z0Z0op RZBZ0Z0Z ZPa0ZpZ0 0Z0ZpZ0Z ZQZbM0Z0 0Z0Z0OPO Z0S0Z0J0 a
2996 8
A Pair of bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZqZrj Z0ZbapZp 0Z0opo0Z Z0Z0Z0ZQ po0MPO0Z Z0Z0Z0OB POPZ0Z0O ZKS0Z0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3001 8 7 6 5 4 3 2 1
3004
0Zks0a0s ZpobZpop pZnZ0Z0Z Z0o0Z0Z0 0Z0ZPZ0Z Z0Z0ANZ0 POPZNOPO Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3006
0ZkZra0s ZpobZ0op pZpZ0Z0l Z0Z0OpZ0 0Z0M0Z0Z Z0Z0ZPZ0 POPMQZPO S0Z0S0J0 a
c
rZ0ZrZkZ ZbZ0ZnZ0 pZ0opZpZ Z0Z0Z0Z0 0ZPZPZ0Z Z0M0a0Z0 PO0MBZKZ Z0ZRZRZ0 a
3003 8
b
3005
rZ0ZkZ0s ZpobZpop pZpZ0ZnZ Z0a0Z0Z0 0ZNZPZ0Z Z0Z0ANZP POPZ0OPZ S0Z0ZRJ0 a
0Z0srZkZ Z0l0mpo0 po0o0Z0o Z0mPZ0ZP 0Z0ZPO0Z Z0Z0ZQA0 PZ0Z0ZPZ ZBS0S0ZK a
3002 8
A Pair of bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ Zpl0mpop pZ0a0Z0Z Z0ZpZ0Z0 0Z0M0O0Z Z0O0AQZ0 PO0Z0ZPO SNZ0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3007 8 7 6 5 4 3 2 1
3010
rZ0l0Z0Z Zponm0Zk 0o0o0o0Z Z0Z0oPo0 0O0ZPZPZ O0ZPZBJ0 0ZPA0Z0Z S0ZQZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3012
rZ0Z0skZ oRZ0Zpop nZ0Z0m0Z Z0ZPZ0Z0 PZpZ0Z0Z Z0O0A0Zq 0ZQZBO0O Z0ZRZ0J0 a
c
0Zks0Z0s opZnZpZp 0ZpapobZ l0Z0Z0Z0 0ZBO0ZPZ Z0O0A0ZP PO0MQO0Z Z0JRZ0ZR a
3009 8
b
3011
rZ0Z0skZ opZ0ZpZp 0Z0ZbZ0Z ZRZ0a0o0 0Z0Z0Z0Z O0lBO0Z0 0Z0M0OPO ZQZ0J0ZR a
rmbl0s0j apopZpZp 0Z0m0OpZ Z0Z0Z0M0 0ZBZ0L0Z Z0Z0Z0Z0 PA0Z0OPO S0Z0ZKZR a
3008 8
A Pair of bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0srZkZ opZ0Zpop 0a0ZqZnZ Z0o0Z0ZB 0Z0Z0Z0Z Z0OPZ0A0 PO0Z0ZPO S0ZQZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3013 8 7 6 5 4 3 2 1
3016
rZbl0skZ opZ0Z0Zp 0ZnZpZ0a ZBZpZ0Z0 0Z0O0Z0o Z0M0ZNZ0 POPZRJPO S0ZQZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3018
rZ0ZkZ0s ZblnZpZp pZ0ZpZ0L Z0o0Z0Z0 0ZPZ0Z0Z APZ0ZNO0 PZ0Z0OBO S0Z0Z0J0 a
c
0Z0ZrskZ opZbZpo0 0ZnZ0Z0o Z0ZqZ0Z0 0Z0o0A0L O0ZBZ0Z0 0OPZ0OPO S0Z0S0J0 a
3015 8
b
3017
0Z0ZrZkZ ZpZqm0Zp 0ZpZbopZ Z0Z0ZpZ0 0ZPO0ZPZ ZPAQZ0Z0 0ZBZ0OPZ S0Z0Z0J0 a
rZ0Z0skZ opZ0Z0op 0ZnZ0ZqZ Z0ZbZpZQ 0Z0Z0Z0Z O0ABZ0Z0 0O0Z0OPO Z0Z0SRJ0 a
3014 8
A Pair of bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZnZkZ ZpZ0Z0op pZqZ0o0Z Z0s0Z0Zb 0ZPZPZ0Z O0Z0ZPZ0 0AQSBO0O Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3019 8 7 6 5 4 3 2 1
3022
rZ0lrmkZ opZ0apop 0ZpZpm0Z Z0Z0Z0Z0 0ZBOPA0Z Z0M0ZQZP PO0Z0OPZ S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3024
0Z0s0Z0s ZpZ0jpop pZ0Zbm0Z Z0Z0Z0Z0 0Z0Z0A0Z Z0ZBZ0ZP POPZ0ZPZ Z0S0ZRJ0 a
c
rZ0Z0lkZ o0Z0Zpap 0Z0ZbZpZ L0Zpo0Z0 0Z0Z0Z0Z Z0Z0ZPZ0 POPZ0ZPO Z0JRZBZR a
3021 8
b
3023
rZ0Z0ZkZ ZpZbZ0op 0Z0o0a0Z o0ZPZpZ0 0Z0Z0Z0Z O0M0ZPO0 0O0ZBZ0O Z0S0Z0ZK a
rZrZbZkZ Zpo0Zpop 0Z0o0m0Z oPZ0Z0Z0 PZPZPO0Z Z0Z0Z0Z0 0Z0A0ZPO S0Z0SBJ0 a
3020 8
A Pair of bishops
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ ZpZ0opap 0Z0obZpZ o0Z0Z0Z0 PZ0ZPZ0Z ZPM0A0Z0 0O0Z0OPO ZRZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3025 8 7 6 5 4 3 2 1
3028
rZ0Z0l0Z o0Z0Zrak 0Z0o0ZpZ ZNoPo0Zp PZ0ZPZ0Z Z0Z0Z0OP 0S0L0OKZ Z0S0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3030
0ZrZ0ZkZ Z0Z0apop pZ0o0Z0Z Z0s0o0Z0 Po0ZPZ0Z ZPZPZNZ0 0Z0Z0OPO Z0S0S0J0 a
c
0ZrZ0Z0Z opZnapZ0 0ZpZko0o Z0Z0o0Z0 0ZPZ0Z0M ZPM0Z0O0 PZKZPO0O Z0ZRZ0Z0 a
3027 8
b
3029
0Z0skZ0s ZpZ0Zpo0 0ZpmpZ0o Z0Z0O0ZP pZ0O0ZPZ O0O0Z0Z0 0O0Z0Z0Z ZKARZ0ZR a
rZbl0s0Z oponZ0jp 0Z0o0ZnZ ZNZPZ0o0 0ZNZPo0Z Z0ZQZ0ZP POPZBZPZ S0Z0ZRJ0 a
3026 8
Strong knight versus bad bishop
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZkZ Zpoqspop pZ0Z0Z0Z Z0ZnZ0Z0 0Z0O0Z0Z O0ZQO0ZP 0A0Z0OPZ Z0S0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3031 8 7 6 5 4 3 2 1
3034
rZrZ0ZkZ ZbZ0Zpop 0Z0Zpa0Z o0o0m0Z0 Po0ZPA0Z Z0Z0ZPZ0 0OPM0ZPO S0Z0SBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3036
0s0Z0j0Z ZpZ0opZ0 0Z0o0mpZ o0sPZ0Zp PZ0S0O0Z ZBO0Z0ZP 0O0S0ZPZ Z0J0Z0Z0 a
c
0ZnZ0L0Z ZpZ0Z0sk pZqZpZpo O0ZpOpZ0 0Z0O0OPZ Z0O0Z0ZP 0Z0A0J0Z ZRZ0Z0Z0 a
3033 8
b
3035
0Z0Z0skZ Zpobs0op pZ0l0o0Z Z0o0ZPZ0 0Z0ZPSPZ Z0O0ZNL0 PO0Z0Z0O Z0Z0S0J0 a
0Z0Z0Z0j Z0Z0lpsp 0Z0Zpo0Z o0abZ0Z0 0o0Z0Z0L ZPZBONZ0 PZ0Z0OPO Z0S0ZKZ0 a
3032 8
Strong knight versus bad bishop
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZkZrZ Z0l0apop pZbo0m0Z ZpZ0oPA0 0Z0ZPZ0Z ZBM0Z0L0 POPZ0ZPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3037 8 7 6 5 4 3 2 1
3040
0ZbZ0Z0Z Z0Z0Zkop pZ0Zpo0Z ZpMqZ0Z0 0O0Z0O0Z Z0L0Z0O0 PZ0ZPJ0O Z0Z0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3042
0j0Z0Z0s opZ0l0Z0 0ZnZno0s Z0o0oRo0 PZPoPZPZ ZPZNZ0ZP 0ZPZQZBZ Z0Z0S0J0 a
c
0Z0lrZkZ ZpZ0ZpZp pZrZbZpZ Z0ZpZ0Z0 0Z0O0ZPZ ZPM0SPZP PZ0S0LKZ Z0Z0Z0Z0 a
3039 8
b
3041
rZ0l0j0s ZbZ0ZpZ0 pZ0ZpZpZ Z0ZpOnZ0 0o0Z0O0O ZNZ0Z0ZB POPZ0L0Z AKZRZ0ZR a
rZ0ZrZkZ opZ0apop 0Z0o0m0Z Z0Z0oPA0 0ZqZPZ0Z Z0M0Z0Z0 POPZ0ZPO S0Z0LRJ0 a
3038 8
Strong knight versus bad bishop
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Zbj0l Z0onlpZ0 0o0o0mpZ oNZPZ0L0 0ZPZPZPs Z0Z0Z0Z0 POBZ0ZRM Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3043 8 7 6 5 4 3 2 1
3046
0ZrZ0ZkZ ZpZbs0op pl0ZpZ0Z Z0ZpO0Z0 0Z0MpOPO ZPO0O0Z0 0Z0J0Z0Z SQZ0Z0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3048
rZ0Z0skZ Z0ZblpZp 0Zno0apZ o0Z0o0Z0 PoPZPZ0Z ZPZ0ZNZ0 0Z0ZBOPO ZRAQZRJ0 a
c
rZ0s0ZkZ o0Z0Zpo0 0ono0l0o Z0Z0Z0Z0 0ZPO0O0Z Z0ZQZ0Z0 PA0Z0ZPO Z0S0ZRJ0 a
3045 8
b
3047
rZbZ0s0j opo0lpo0 0Z0Z0anZ Z0Z0o0o0 0ZNZPZ0Z ZBO0ZNZP PO0ZQOPZ Z0ZRS0J0 a
qZ0s0ZkZ ZbZ0Zpo0 pZpZrZno ZpS0ZNZ0 0O0OBm0Z O0Z0Z0MP 0Z0L0OPZ Z0S0Z0ZK a
3044 8
Strong knight versus bad bishop
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0l0skZ Z0Z0Zpap pm0MbZpZ Z0oNo0Z0 PZBZPZ0Z Z0Z0ZPZ0 0OQZ0ZPO ZKZRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3049 8 7 6 5 4 3 2 1
3052
rZ0Z0mkZ opZ0spap 0ZpM0ZqZ Z0Z0o0Z0 0ZPZ0Z0Z Z0Z0A0OP PO0ZQO0J Z0ZRS0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3054
rZ0Z0Z0j opZnlrap 0Z0oNZbZ Z0oPo0Zn 0ZPZ0Z0Z ZPM0A0Z0 PZ0LBO0O Z0Z0ZRSK a
c
0ZrZ0skZ opo0Zpa0 0Z0o0Z0o Z0mPo0l0 0ZPZPZ0M Z0M0Z0O0 PO0Z0ZPZ S0ZQJ0ZR a
3051 8
b
3053
rZbZ0ZkZ o0Z0lpop pZpZpa0Z Z0OrZ0Z0 0Z0O0A0Z O0Z0ZNZ0 0O0Z0OPO S0ZQZRJ0 a
0ZrZ0Z0s opo0Zpak 0Z0o0Z0o Z0mPoNZ0 0ZPZPl0Z Z0M0ZQZ0 PO0ZKZPZ S0Z0Z0ZR a
3050 8
Strong knight versus bad bishop
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0Z0skZ Z0Z0l0a0 pZpZ0o0Z M0Zpo0o0 0OPZPZQZ Z0Z0Z0O0 PZ0Z0ZPJ S0ZNZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3055 8 7 6 5 4 3 2 1
3058
0ZrZrakZ Zbl0Zpop pZ0m0ZnZ ZpZpM0A0 0Z0O0Z0O ZPZ0MPZ0 PZBLRZPZ Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3060
rZ0Z0ZrZ Zpo0mkZ0 0Z0a0ZpZ o0o0opSp PZNZPZ0Z Z0ZPAPZP 0OPZKO0Z Z0Z0Z0S0 a
c
0ZrZ0skZ o0ZqZ0Zp 0Z0o0o0Z a0mPoNoP PZpZPZPZ L0O0APZ0 0Z0Z0Z0Z SRZ0ZKZ0 a
3057 8
b
3059
0Z0Z0skZ opZbZ0op 0m0Zps0Z Z0ZpZ0Z0 0ZnM0O0O Z0M0ZRZ0 POPZ0ZPZ ZKZRZBZ0 a
0Z0Z0ZkZ Z0orZpop 0o0Zra0Z o0o0o0Z0 PZ0mPZ0Z ZPAPM0OP 0ZPZ0OKZ S0Z0S0Z0 a
3056 8
Strong knight versus bad bishop
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrakZrZ Z0Z0ZpZ0 0Zbo0o0o Z0ZBoPZ0 po0ZPZ0Z ZPZ0S0O0 PZPZ0Z0O ZKMRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3061 8 7 6 5 4 3 2 1
3064
rZ0Zqs0j Z0Z0Zpa0 0ZpL0Z0o o0O0o0Z0 PoRZPo0Z Z0Z0ZNZP 0O0Z0OPZ Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3066
0j0s0Z0Z ZbZ0Z0Z0 BZ0Zro0Z Z0Z0oNa0 0l0oPZ0o Z0Z0ZRZ0 0OQZ0ZPO ZKZRZ0Z0 a
c
0Z0s0j0Z ops0ZpZ0 0anl0o0Z Z0Z0o0Z0 0Z0oBZ0Z O0ZQONZ0 0O0Z0OPO ZKSRZ0Z0 a
3063 8
b
3065
0Z0skarZ opZ0mpZp 0Z0Z0o0Z Z0Z0oNZ0 0Z0ZPZ0Z Z0O0Z0O0 PO0M0Z0O S0ZKZ0ZR a
0sblrZkZ ZpZnZpa0 pM0o0Zno O0oPZ0o0 0Z0ZPZ0Z Z0Z0MPZ0 0O0ABZPO S0ZQZRJ0 a
3062 8
Strong knight versus bad bishop
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0l0ZrZkZ ZpZnZpa0 0Zpo0Z0Z s0ZPo0op PZPZPm0Z Z0M0A0ZP 0ZQZ0OPM S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3067 8 7 6 5 4 3 2 1
3070
0ZrZ0skZ opZqZpa0 0m0o0Z0o Z0ZPo0o0 0Z0ZPm0Z Z0M0M0A0 PO0Z0OPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3072
rZnZqZ0j ZpZ0Z0Zp pZ0orapZ Z0Z0o0Z0 PO0ZPoPZ ZQM0ZPZ0 0Z0Z0ZKO S0A0ZRZ0 a
c
0ZbZrZ0Z ZpZ0l0Z0 pZ0ZPZkZ Z0ZpZpo0 0Z0O0O0Z O0Z0L0Op 0O0Z0Z0M Z0Z0S0J0 a
3069 8
b
3071
0ZkarZ0s ZpZ0lpZp pZpo0ZnZ Z0Z0Z0Z0 0Z0OPZNZ Z0Z0ZQON POPZ0Z0Z ZKZ0ZRZR a
0s0l0skZ ZpZnZpZp 0Z0o0ZpZ oPZPZ0Z0 PZ0L0Z0Z Z0Z0S0Z0 0Z0Z0OPO Z0Z0SBJ0 a
3068 8
Strong knight versus bad bishop
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0arZkZ o0ZqZ0op 0Z0o0Z0Z Z0oNZpZ0 0Z0Z0Z0Z ZPZ0Z0L0 PZPZ0OPO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3073 8 7 6 5 4 3 2 1
3076
0a0ZqZrZ ZpZ0ZbZk 0ZpZpZ0o Z0OpZpZ0 0O0OnM0Z Z0ZQOBO0 0Z0Z0Z0O Z0Z0ARZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3078
rZ0ZrZkZ Zpo0l0Zp 0Z0o0ZpZ o0ZPonZP 0ZPZQZ0Z Z0Z0Z0O0 PO0ZBO0Z S0Z0J0ZR a
c
0Z0ZrZ0Z ZpZ0ZpZk pZpZ0sqZ Z0AnZ0o0 PZ0OpZPo ZPZ0O0ZP 0ZRZ0OQJ Z0S0Z0Z0 a
3075 8
b
3077
0Z0Z0Z0s o0j0a0op 0ZpZ0o0Z Z0Z0o0Z0 0ZNZ0Z0Z Z0O0Z0Z0 PO0ZKOPO Z0ZRZ0Z0 a
rZ0lrZkZ o0Z0Z0Zp 0ZpZ0ZpZ Z0OpZpZ0 0o0OpO0Z ZPZnO0ZP PZQZ0ZPZ Z0ZRARJ0 a
3074 8
Strong knight versus bad bishop
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ o0Z0ZpZp 0o0o0ZpL Z0mPZ0Z0 0ZPZ0Z0Z Z0ZBZRZ0 PO0Z0ZPO S0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3079 8 7 6 5 4 3 2 1
3082
0s0Z0skZ m0ZqZ0op 0Z0obo0Z opZNo0a0 0Z0ZPZ0Z M0O0Z0L0 PO0ZBOPO S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3084
0Z0Z0skZ opl0Zpop 0ZnZpZ0Z Z0Z0Z0Z0 0Z0Z0Z0Z Z0L0Z0O0 PO0ZPOBO Z0JRZ0Z0 a
c
rZ0lrZkZ Zpo0Zpop pZna0m0Z Z0Z0Z0Z0 PZ0OpZ0Z Z0Z0O0M0 0O0A0OPO S0ZQMRJ0 a
3081 8
b
3083
0ZrZkZ0s Z0l0apo0 pm0o0m0Z Z0Z0oPZ0 RZ0ZPZ0o ZNM0A0ZP 0OPZ0SPZ Z0ZQZ0J0 a
0Z0ZrZkZ Z0mnZ0lp 0o0o0ZpZ Z0oPZpZ0 0ZPZ0O0Z Z0M0Z0Z0 PZBL0ZPO ZRZ0Z0J0 a
3080 8
Exchange of a piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ opZnZpo0 0ZbZpZ0o Z0Z0O0Z0 0ZBZ0Z0Z O0M0Z0Z0 0O0ZQOPO S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3085 8 7 6 5 4 3 2 1
3088
rZbl0skZ opmnZ0a0 0Z0o0Z0o Z0oPZpZ0 0ZPZpO0Z O0M0A0ZN 0O0ZBZPO S0ZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3090
rZbZkZ0s o0Z0mpop 0onZpZ0Z Z0ZpO0Z0 qZ0O0Z0Z O0AQZNZ0 0ZPZBOPO S0Z0J0ZR a
c
0ZrZrZkZ opZbZpop 0a0Z0m0Z Z0Zpl0Z0 0Z0M0Z0L ZPZ0O0O0 PARZ0OBO A0Z0ZRJ0 a
3087 8
b
3089
0s0ZkZ0s opZ0mpo0 0ZnZpZ0o Z0ZpO0Z0 0Z0O0ZPO l0Z0Z0ZB PZ0ZQOKZ Z0ZRZ0ZR a
rZ0ZrZ0j ZbZ0l0Zp 0Z0onopZ o0Z0o0Zn Po0OPZ0Z ZBZ0ANZ0 0O0Z0OPO Z0SQS0J0 a
3086 8
Exchange of a piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ Z0Z0apop poqZpZ0Z Z0o0O0Z0 0Z0ZNA0Z Z0Z0Z0Z0 POPZQOPO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3091 8 7 6 5 4 3 2 1
3094
0s0Z0s0Z Z0Zbopjp pl0o0ZpZ ZpZPm0Z0 0Z0Z0Z0Z ZPZ0Z0OP PZNZPOBZ Z0SQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3096
rZ0l0ZkZ Z0obZrZp 0o0m0ZpZ o0mPo0Zn 0ZPZPo0a Z0MNZPZ0 POBL0APO ZKS0ZRZ0 a
c
rZ0lrZkZ opZ0Zpo0 0Znabm0o Z0ZpM0Z0 0Z0O0Z0A Z0MBZ0Z0 POQZ0OPO S0Z0ZRJ0 a
3093 8
b
3095
rZ0lrZkZ obanZ0op 0ZpZpZ0Z Z0OpZpZ0 PZ0OnZ0Z Z0ZNZNO0 0ZQZPOBO S0A0ZRJ0 a
rZbZrZkZ opo0Zpop 0ZnZ0l0Z Z0Z0o0Z0 0ZPZPZ0Z Z0L0ZNZ0 PO0ZBOPO S0ZRZ0J0 a
3092 8
Exchange of a piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rmblkZ0s opZ0Z0op 0Z0o0Z0m Z0oPopZ0 0Z0ZPZ0Z Z0MBZNZP POPZ0OPZ S0L0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3097 8 7 6 5 4 3 2 1
3100
rZ0j0Z0A Zbo0Zpop po0m0a0Z Z0ZPZ0Z0 0Z0MrZ0Z O0Z0A0Z0 0OKZBOPO Z0ZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3102
0ZrmkZ0s o0mba0op 0o0Z0o0Z Z0o0Z0Z0 PZNZ0A0Z Z0MPZ0O0 0O0ZPZBO S0Z0ZRJ0 a
c
0l0lnZkZ ZpZba0s0 pZ0o0ZnZ O0ZPo0Z0 0Z0ZPoPZ MQZ0Z0Z0 0ORZBMPZ Z0S0A0J0 a
3099 8
b
3101
rlns0ZkA Z0Z0mpap pZpobZpZ Z0Z0o0Z0 NOPZPZ0Z Z0ZQZPO0 PM0Z0ZBO ZRZRZ0J0 a
rZ0l0skZ o0Z0Z0a0 0o0o0m0o Z0ZPobo0 0O0Z0m0Z Z0M0APZ0 PZ0ZBMPO Z0SQZRJ0 a
3098 8
Exchange of a piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ opZ0m0ap 0l0o0mpZ Z0ZPopZ0 0Z0ZPZPZ Z0M0ZPZ0 PO0ZBM0O S0AQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3103 8 7 6 5 4 3 2 1
3106
rZbZ0skZ opZ0l0ap 0ZnZ0mpZ ZNZ0o0Z0 0Z0ZPo0Z Z0ZNZPZ0 PO0ABZPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3108
rZblna0j Z0o0Z0s0 0Z0Z0Z0Z oNMPo0Zp PZ0ZPopZ Z0Z0ZPZ0 0ZQZBZPO ZRS0Z0J0 a
c
rZrZqakZ ZpZbZpZp 0Zpo0mpZ Z0OPo0Z0 nO0ZPZ0Z MNZ0Z0Z0 0ZQZBOPO S0A0ZRJ0 a
3105 8
b
3107
rZqZ0s0j Z0o0Z0ap 0oPo0mpZ Z0ZPo0An 0ONZPZ0Z Z0M0Z0Ob 0Z0LBS0O ZRZ0Z0J0 a
rZ0ZnakZ Z0ZqZ0Zp 0ZnobZpA ZNZ0o0Z0 0oPZPZ0Z ZNZQA0ZP 0O0ZBZPZ Z0Z0ZRJ0 a
3104 8
Exchange of a piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rlrZnZkZ ZpZbZpap 0Z0o0ZpZ o0mPo0Z0 0Z0ZPZ0Z OPM0ZQZ0 0Z0M0OPO ZRA0SBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3109 8 7 6 5 4 3 2 1
3112
rZ0Z0s0Z Z0mbl0j0 0o0o0opo o0oPo0Z0 PZPZPO0O Z0M0Z0O0 0O0L0SBJ Z0Z0ZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3114
rZbZnskZ opZnl0ap 0Z0o0Z0Z Z0oPZpZ0 0ZPZpO0Z Z0M0Z0Z0 PO0ZBMPO S0AQZRZK a
c
rZbZ0lkZ ZponZ0ap 0Z0o0ZpZ o0mPo0O0 0ZPZPs0Z Z0M0A0L0 PO0MBO0Z S0Z0J0S0 a
3111 8
b
3113
rZrZ0ZkZ Z0lbZpa0 0Z0o0mpo ZpZPo0Z0 0OnZPZ0Z ZQM0ZNZ0 0Z0ZBOPO S0S0Z0J0 a
rlrZnZkZ Z0ZbZpap 0o0o0ZpZ o0mPo0A0 PZBZPZ0Z ZPM0Z0ZP 0Z0M0OPZ Z0SQZRJ0 a
3110 8
Exchange of a piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0sbs0ZkZ Z0Z0Zpop pZpZpZ0Z l0ZpO0Z0 NZPZnO0Z aPZ0A0O0 PZQZ0ZBO Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3115 8 7 6 5 4 3 2 1
3118
0ZrlrZkZ ZpZnZpZp pZ0obZpA Z0ZNm0Z0 PZ0ZPSPa ZNZ0Z0ZP 0OPL0ZBJ Z0Z0ZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3120
rZbZ0skZ opl0Z0op 0Z0Z0m0Z Z0Zpa0Z0 0Z0Z0Z0A Z0ZBZ0Z0 PO0ZNOPO S0ZQZRJ0 a
c
0ZrZrZkZ ZpZ0opap pZ0o0mpZ l0ZPZ0A0 0Z0Z0Z0L ZPZ0Z0O0 PZ0ZPOBO Z0SRZ0J0 a
3117 8
b
3119
rZblka0s o0ZnZpop 0ZpZpZ0Z Z0ZpO0Z0 0Z0Z0Z0Z Z0ZBZNZ0 POPZ0OPO S0AQJ0ZR a
rZ0lkZ0s ZpZbapZp 0Z0ZpZpO m0Z0O0Z0 pZpONZ0Z O0Z0ZNZ0 0O0Z0OPZ S0AQZRJ0 a
3116 8
Exchange of a piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ opZ0Z0ap nZpo0Z0Z Z0ZPo0Z0 0ZPZPo0Z Z0M0ZPZb PO0JBA0O Z0ZRZ0S0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3121 8 7 6 5 4 3 2 1
3124
rZ0Z0s0Z ZbZqZpak pono0Zpo Z0ZBZ0Z0 0O0OPZ0Z Z0Z0ANZP 0Z0L0OPZ S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3126
0Z0s0mkZ Zpl0apop pMpZbZ0Z Z0O0o0Z0 0OBZPZ0Z Z0Z0A0ZP PZQS0OPZ Z0Z0Z0J0 a
c
rZblkZ0s opo0Z0ap 0ZnZ0Zpm Z0Z0opZ0 0ZPZ0Z0Z Z0M0O0O0 PO0ZNOBO S0AQJ0ZR a
3123 8
b
3125
rZbZkZ0s ZplnZpop pZnopa0Z Z0Z0Z0Z0 0ZPZPO0Z O0MBANZ0 0O0ZQZPO S0Z0J0ZR a
rZ0l0skZ Zpo0Zpa0 0Z0o0Zpo ZPZ0o0Z0 0ZPm0ZbZ Z0MPZNO0 0Z0ZPOBO ZRZQZRJ0 a
3122 8
Exchange of a piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZqZrskZ opo0Zbap 0mno0ZpZ ZQZNZpZ0 PZPZ0O0Z Z0ZPO0ZP 0O0ANZBJ S0Z0ZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3127 8 7 6 5 4 3 2 1
3130
0Z0Zrs0j oplbZ0op 0Z0ZpmnZ Z0O0Z0Z0 0ZQA0O0Z ZNZ0Z0O0 PZ0Z0ZBO Z0Z0SRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3132
rZ0lrZkZ Zpa0mpop pZnZ0Z0Z ZBApZ0Zb PZ0Z0Z0Z ZNO0ZNZP 0O0Z0OPZ S0ZQS0J0 a
c
0ZrZrZkZ ZqZbopap pZpZ0ZpZ O0ZpM0Z0 0Z0OnZPZ Z0O0Z0ZP RO0ZBO0A Z0ZQZRJ0 a
3129 8
b
3131
0ZrZ0mkZ obZ0Zpo0 0o0Z0Z0o Z0l0o0Zn 0Z0ZPZ0Z O0Z0ZPZ0 0O0L0MPO Z0ZRABJ0 a
rZ0s0ZkZ obZ0apo0 0o0ZpZ0Z Z0Z0Z0Zp 0O0mPZqZ O0ZBZNA0 0Z0Z0OPO S0ZRZQJ0 a
3128 8
Exchange of a piece
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ ZpZRZpop pZpZ0Z0Z O0Z0o0Zb 0lBZPZ0Z Z0Z0LPZ0 0O0Z0ZPO Z0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3133 8 7 6 5 4 3 2 1
3136
rZbl0skZ opZnapop 0Z0ZpZ0Z Z0opO0A0 0Z0Z0Z0Z Z0OBO0Z0 PO0M0OPO S0ZQJ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3138
rZ0l0skZ ZpZ0opap 0Zbo0ZpZ o0Z0Z0Zn 0ZPAPZ0Z ZPM0ZPZ0 PZ0LBZPO S0Z0ZRJ0 a
c
rZ0lbskZ opZ0apop 0m0ZpZ0Z Z0ZnM0A0 0Z0O0Z0Z ZBM0Z0Z0 PO0Z0OPO S0ZQS0J0 a
3135 8
b
3137
rZ0Z0skZ ZbZnopap pZno0ZpA lpZ0Z0Z0 0Z0OPZ0Z Z0ZBZNZP PO0LNOPZ S0Z0ZRJ0 a
bZ0ZkZ0s Z0Z0apop 0mQZpZ0Z ZpZ0O0A0 0mpONZ0Z Z0Z0ZNZ0 0O0ZQOPO ZBZ0S0J0 a
3134 8
Avoiding exchanges
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZkZ0s Zbl0ZpZp po0ZpZ0L Z0m0Z0Z0 0ZPZ0Z0Z APZ0ZNO0 PZ0Z0OBO S0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3139 8 7 6 5 4 3 2 1
3142
rm0ZrZkZ Zbl0ZpZp pZpo0mpa ZpZPo0Z0 0OPZPZ0Z Z0Z0ZNZP PZBZ0OPZ S0AQSNJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3144
rZbZrZkZ opoplpop 0Z0Z0m0Z Z0Z0m0Z0 0ZPZ0Z0Z Z0O0ONO0 PZ0O0ZBO S0AQZRJ0 a
c
0Z0Z0Z0j Zpobm0ap 0Z0o0Z0Z Z0OPZpZ0 0O0Z0Z0Z ZQZ0ZBZ0 0l0ZNZPO Z0Z0Z0AK a
3141 8
b
3143
rZbZkZ0s Zpo0Zpop pZpZqZnZ Z0a0o0Z0 0ZNZ0Z0Z Z0ZPANZ0 POPZ0OPO S0ZQZRJ0 a
0sblns0j Z0Z0m0ap 0Z0o0ZpZ Z0oPo0A0 0ZPZPo0Z ZNM0ZPZ0 0Z0ZBZPO S0ZQZRJ0 a
3140 8
Avoiding exchanges
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ ZpZ0lpZp 0Zpo0mpa Z0ZPo0Z0 bOPZPZ0Z Z0ZQZNZ0 0Z0ZBOPO ZRA0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3145 8 7 6 5 4 3 2 1
3148
0Z0Z0s0j o0Z0Z0ap 0ZBZ0ZpZ Z0O0Z0m0 0ONZpZ0Z O0ZrZpOb 0A0Z0O0O Z0Z0S0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3150
0Z0Z0skZ Z0Z0Zqap 0Z0ZbZ0Z o0spZPZQ 0Z0ZpO0Z Z0O0M0Z0 PZ0S0ZBO Z0ZRZ0ZK a
c
rZ0Z0a0s opZ0ZkZp 0Z0Z0opZ Z0ZpZqZ0 0Z0Z0Z0Z Z0Z0ZQZ0 POPZ0OPO S0A0S0J0 a
3147 8
b
3149
0sbl0skZ ZpZ0opap pZ0onmpZ Z0Z0Z0Z0 0ZPMPZ0Z Z0M0ABZP PO0Z0OPZ Z0SQZRJ0 a
0Z0ZrZkZ Z0Z0Zpop 0Z0Z0Z0Z opZpZbO0 PZ0A0m0Z ZBZ0ZqZ0 0OPL0Z0O Z0J0S0Z0 a
3146 8
Avoiding exchanges
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0ZkZ oqZ0mpo0 0opZpm0o Z0Z0Z0Z0 0ZPObZ0Z L0Z0ZNO0 PA0ZPOBO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3151 8 7 6 5 4 3 2 1
3154
rZ0Z0skZ Z0Z0Zpop qZ0ZpZ0Z o0mpO0Z0 0Z0M0O0Z OpO0Z0Z0 0O0ZQZPO Z0ZRZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3156
rZ0l0s0j opZbZpap 0Z0o0Z0m ZBoPopZ0 PZ0Z0Z0Z Z0O0ONOP 0OQM0O0Z S0Z0J0ZR a
c
rZ0s0ZkZ ZpoqZpap 0Z0Z0ZpZ mPZ0o0Z0 0Z0Z0Z0Z Z0MPO0Ob 0ZQS0OBO ZRA0Z0J0 a
3153 8
b
3155
0mrZnZ0Z Z0ZkZ0op 0Z0o0o0Z ZrZPo0Z0 pO0Z0O0Z O0Z0MKO0 0A0S0Z0O Z0S0Z0Z0 a
0ZnmrZkZ opoqZrap 0Z0o0ZpZ ZPZNo0Z0 0ZPZ0Z0Z Z0ZPA0Ob PZ0LNOBO Z0S0S0J0 a
3152 8
Avoiding exchanges
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZqZ0skZ opZ0opap 0Zno0mpZ Z0Z0Z0Z0 0ZPM0Z0Z ZPM0O0Ob PZ0Z0OBO S0AQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3157 8 7 6 5 4 3 2 1
3160
rZ0l0skZ ZponZpop 0Z0opm0Z o0Z0Z0Z0 0ZPObZ0Z OPL0ZNO0 0Z0ZPOBO S0A0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3162
0ZrZrZkZ o0onlpo0 0o0opm0o Z0Z0Z0Z0 0ZPObZ0Z ZPA0LNO0 PZ0ZPOBO Z0SRZ0J0 a
c
rZ0ZqskZ ZpobZpZn nZ0o0apZ o0ZPo0Zp 0ZPZPZ0A O0M0ZPZ0 0O0MBZPO S0ZQZRZK a
3159 8
b
3161
rZqZ0skZ o0onZpop 0o0opm0Z Z0Z0Z0Z0 0ZPObZ0Z ZPL0ZNO0 PA0ZPOBO S0Z0ZRJ0 a
0j0Z0Z0s ZbZ0ZpZ0 0l0ZpZpZ o0apO0O0 0o0Z0O0Z Z0ZBZQM0 POPZ0Z0Z ZKZ0Z0ZR a
3158 8
Avoiding exchanges
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0Z0Z Z0o0Z0op pZpZ0o0Z Z0a0Z0Zn 0APZPZ0Z Z0ZrZ0ZP PZNZROPZ Z0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3163 8 7 6 5 4 3 2 1
3166
0Z0s0mkZ Z0Z0l0Zp 0opZnopZ o0a0o0ZP PZNZPZBZ Z0O0Z0O0 0O0ZQOKZ Z0ARZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3168
rZbZ0skZ opZnZ0ap 0ZpL0ZpZ Z0Z0l0Z0 0ZPZPZpZ Z0M0A0Z0 PO0Z0OPZ Z0ZRSBJ0 a
c
rmqZrZkZ o0Z0Zpop bo0Z0m0Z Z0opZ0Z0 0Z0O0Z0Z O0OBOPZ0 RZ0ZNZPO Z0AQZRJ0 a
3165 8
b
3167
0m0s0Z0Z ZbZ0lkZp 0ZpZpo0Z Z0Z0Z0Z0 0ZQZ0Z0Z Z0O0Z0O0 0Z0Z0OBO Z0ARZ0J0 a
0ZrZ0skZ obZ0Zpap 0o0lpZpZ Z0Z0Z0Z0 0ZPOBmNZ O0Z0Z0Z0 0Z0A0OPO Z0S0SQJ0 a
3164 8
Avoiding exchanges
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0m0Z0skZ Z0Z0ZpZp 0Z0o0ZpZ l0o0Z0Z0 QZ0ZPA0Z Z0a0ZNOP 0Z0Z0OKZ Z0S0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3169 8 7 6 5 4 3 2 1
3172
0s0jrZ0Z o0oqZ0op QZ0a0o0Z Z0ZRZ0Z0 0Z0O0A0Z Z0Z0Z0Z0 PO0Z0ZPO Z0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3174
rZrjnZ0Z o0ZnZpop 0o0ZpZ0Z Z0Z0Z0Z0 PZ0OPA0Z Z0Z0ZPZ0 0Z0ZKZPO S0S0ZNZ0 a
c
0Z0lrZ0Z Z0o0a0j0 0o0o0mpo Z0ZPo0Z0 QOPZNZ0Z Z0Z0Z0ZP 0Z0A0OPZ S0Z0Z0J0 a
3171 8
b
3173
rZ0Z0skZ o0onZpop qonZpZ0Z ZQZ0O0Z0 0ZPO0Z0Z Z0A0Z0M0 PZ0Z0OPO S0Z0ZKZR a
0Z0Z0Z0Z Z0ZrlrZk pZpZ0Zpa ZpZ0opZ0 0Z0ZPZ0L ZPMPZ0S0 PZPZ0Z0O Z0Z0Z0SK a
3170 8
Avoiding exchanges
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZrl0ZkZ Z0Z0opap 0obo0ZpZ Z0Z0Z0Z0 nOPZPZ0Z Z0M0APZ0 0ZRLBZPO ZRZ0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3175 8 7 6 5 4 3 2 1
3178
rZrl0ZkZ ZpZ0ZpZp 0ZbopZpZ Z0Z0a0Z0 nOPZPZ0Z Z0M0APZ0 0ZRL0ZPO ZRZ0ZBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3180
rZblrZkZ opZ0Zpop 0ZpZpm0Z Z0ZnZ0M0 0ZBONZ0Z Z0Z0O0Z0 PO0Z0OPO Z0SQZRJ0 a
c
rZ0ZrZkZ ZbZnapZp 0ZqZ0ZpA ZpZ0o0Z0 0OpZPZ0Z Z0O0ZQMP 0ZBZ0OPZ S0Z0S0J0 a
3177 8
b
3179
0s0ZrZkZ Z0ZnopZp po0obZpZ Z0lNZ0Z0 0ZPLPO0Z Z0S0Z0Z0 PO0ZBZPO Z0ZRZ0ZK a
rZ0l0skZ ZbZ0opap 0Zno0mpZ Z0o0Z0Z0 0o0ZPO0Z ZPZPANOP 0ZPZNZBZ S0ZQZRJ0 a
3176 8
Avoiding exchanges
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0snm0Z opZ0Zpjp 0ZpMbZpZ O0Z0M0Z0 0OPZ0Z0Z Z0Z0Z0ZP 0Z0Z0OPZ S0ZRZBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3181 8 7 6 5 4 3 2 1
3184
rZ0Z0skZ Z0Zqapop 0ZpZ0m0Z ZpZ0ZpZ0 0m0OPZ0Z ZBM0APZ0 0O0ZQZPO S0Z0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3186
0Z0Z0j0Z ZrZpZpZ0 0Z0SrZ0o opZ0ORo0 0ZqZ0Z0Z O0OQZ0ZP 0O0Z0ZPZ Z0Z0Z0ZK a
c
rZ0l0skZ Z0ZnZpo0 bZnZpZ0o o0apO0Z0 0Z0Z0M0Z Z0OBZNA0 PZ0Z0OPO S0ZQS0J0 a
3183 8
b
3185
rZ0Z0ZkZ ZblnZpop 0Z0ZpZ0Z ZpZpO0AQ rOnO0Z0O Z0Z0Z0O0 0Z0Z0OBM S0Z0S0J0 a
rZblrZkZ ZpZ0Zpap pZ0o0mpA Z0o0Z0Z0 0ZPmPZPZ Z0M0ZPM0 PO0LBZ0Z S0Z0J0ZR a
3182 8
Avoiding exchanges
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZqZ0skZ Z0Z0opap bo0o0ZpZ oNmPZ0Z0 PZPZ0O0Z S0Z0A0Z0 0O0LBZPO Z0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3187 8 7 6 5 4 3 2 1
3190
rZbZrZkZ oplnZpap 0Z0Z0mpZ ZPM0Z0Z0 0ZpZ0Z0Z A0M0O0Z0 PZ0ZBOPO Z0SQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3192
rZ0Z0s0j opo0Z0a0 0Z0o0l0o Z0ZQZPo0 0ZPm0ZPZ Z0M0Z0Z0 PO0ZBOPZ Z0JRZ0ZR a
c
rZbZ0skZ opo0o0Zp 0Z0lpZpZ Z0Z0Z0Z0 0ZBaNZnZ Z0Z0ZNZ0 POPZQOPO S0A0Z0J0 a
3189 8
b
3191
0SbZ0skZ Z0l0Z0Zp 0Z0Z0Z0Z Z0spopZ0 0Z0Z0Z0Z O0Z0Z0O0 0Z0L0O0O ZRZ0ZBJ0 a
0Zrl0skZ obZ0apZp 0onZpZpZ Z0Z0Z0Z0 0Z0O0AnZ O0MQZNZ0 BO0Z0OPO S0Z0S0J0 a
3188 8
Liquidation
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0skZ Z0ZqZ0Zp bopZnopZ o0ZpZ0Z0 PZPO0L0Z ZPZ0SNZP 0Z0Z0OPZ Z0ZRZBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3193 8 7 6 5 4 3 2 1
3196
rZrZ0ZkZ Z0Anapop pZ0ZpZ0Z ZpZnZ0Z0 0Z0M0Z0Z ZNZ0Z0O0 PO0ZPOKO Z0SRZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3198
0ZrZrZ0Z opZnZpjp 0Z0Z0lpZ Z0ZPZ0Zn 0ZpZ0Z0Z O0M0Z0ZP 0OBZ0OPZ S0ZQS0J0 a
c
0s0ZnZkZ Z0Z0Zpa0 0Z0o0ZpZ o0oPZ0Zp NZ0ZPZ0Z ZrMnZPZ0 RO0S0APO Z0Z0Z0J0 a
3195 8
b
3197
0Z0Z0skZ Z0Z0Zpap 0O0o0Z0Z Z0ZqZpZ0 PoNmpZ0O Z0Z0Z0S0 0Z0Z0OPZ ZBZQZKZ0 a
rZbZ0skZ ZpZ0Zpop pZ0l0Z0Z Z0Z0M0Z0 PZBZnZ0Z Z0Z0Z0O0 0L0Z0O0O Z0S0ZRJ0 a
3194 8
Liquidation
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0ZrZ l0jpZ0Z0 0SbZ0Z0Z Z0O0o0o0 0Z0o0Z0Z OQZ0ZPo0 0S0Z0ZBZ Z0Z0M0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3199 8 7 6 5 4 3 2 1
3202
rZbjra0Z opZpZ0op 0ZpZ0onZ Z0Z0Z0Z0 0ZBO0Z0Z Z0Z0M0Z0 POPA0OPO S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3204
rZ0a0skZ ZbZ0Zpo0 po0Zpm0o Z0Z0Z0Z0 0Z0Z0Z0A O0M0O0Z0 0O0SBOPO Z0Z0ZRJ0 a
c
rm0Z0Z0j ZpZ0lpo0 pA0onZ0o Z0Z0o0Z0 0Z0ZPZQZ ZBO0Z0O0 PO0Z0O0O Z0ZRZ0J0 a
3201 8
b
3203
0s0Z0skZ Z0Z0ZpZ0 0ZpZ0o0o o0ZpZ0Zb 0O0Z0Z0Z Z0Z0O0ZP PZNZ0OPZ S0Z0ZRJ0 a
0Z0Z0Z0Z oRZ0ZBj0 0Z0o0ZpZ Z0Z0ZbZp 0ZPZ0Z0O Z0Z0Z0O0 PZ0Z0aQJ Z0Z0l0Z0 a
3200 8
Liquidation
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZrZ0Z0Z o0ZkZ0Zp 0o0Zpopa Z0ZnZ0Z0 0Z0Z0Z0Z O0ZPO0O0 0A0M0OKO Z0S0ZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3205 8 7 6 5 4 3 2 1
3208
0Z0srZkZ Zbo0apop pZ0Zqm0Z ZpZ0M0A0 0Z0ZPZ0Z Z0O0M0Z0 PmBZQOPO S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3210
rZ0Z0skZ o0Z0Lpop bm0Z0Z0Z Z0ZpA0Z0 0Z0Z0Z0O Z0ZPZ0O0 PZ0ZqOBZ S0Z0ZRJ0 a
c
rZ0snZkZ ZpZ0Zpap pZnZbZpZ ZNZpZ0Z0 0Z0M0Z0Z ZBZ0APZ0 POPS0ZPO Z0ZRZ0J0 a
3207 8
b
3209
0Z0s0ZkZ Z0o0lpop 0mRZnZ0Z ZpZpZQZ0 pM0O0Z0Z O0Z0O0Z0 0O0M0OPO Z0Z0Z0J0 a
rZbZ0skZ Z0Apopap 0ZnZ0lpZ MpO0Z0Z0 pZ0Z0Z0Z Z0Z0Z0O0 PZ0ZPOBO ZRZQZRJ0 a
3206 8
Liquidation
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrl0skZ obZ0apo0 0o0ZpZ0o Z0ZnM0Z0 0ZBO0O0Z Z0O0Z0Z0 PZ0ZQZPO Z0S0ARJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3211 8 7 6 5 4 3 2 1
3214
rZ0Z0ZkZ opZ0spa0 0ZpZ0mpo Z0M0obZ0 0ZPZ0Z0Z ZPZ0A0O0 PZ0SPOBO Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3216
0Z0Z0Z0s spZbjpo0 0m0Mpa0o o0Z0ZPZ0 PZ0Z0Z0Z ZBZ0ZNZ0 0OPS0ZPO Z0JRZ0Z0 a
c
0ZnZrZkZ o0ZqZpZp 0oRZ0ZpZ ZPZpO0Z0 0Z0A0Z0Z O0Z0O0L0 0Z0Z0ZPO Z0Z0Z0J0 a
3213 8
b
3215
0Z0Z0s0j o0a0lpop 0o0M0Z0Z Z0o0O0Z0 0Z0Z0ZQO O0O0Z0O0 0Z0Z0O0Z Z0ZRZ0J0 a
0Z0Z0Z0Z o0Z0Z0Z0 kopZ0L0Z Z0ZqZbZp PO0o0A0O Z0ZPZNZ0 0ZPZrZPZ Z0Z0Z0J0 a
3212 8
Liquidation
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZkZ0s Z0a0Zpo0 poNZpm0o Z0Z0Z0Z0 NZ0Z0Z0Z Z0Z0Z0O0 PO0ZPOKO Z0SRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3217 8 7 6 5 4 3 2 1
3220
0m0l0skZ spZnZ0op pZpZ0apZ Z0OpZ0Z0 0Z0O0Z0Z ZQMBZ0A0 PO0Z0OPO S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3222
0s0Z0ZkZ Z0ZnZpap pZNOrZpZ Z0o0o0Z0 PZ0Z0Z0Z ZqZ0A0ZP QZ0Z0OPZ Z0SRZ0J0 a
c
0ZrZ0ZkZ o0snl0op bo0apZ0Z Z0o0ZpZ0 0ZPOnM0Z Z0Z0ONO0 PARZQOBO Z0S0Z0J0 a
3219 8
b
3221
rZbZkZ0s opZ0Z0op 0ZpZ0o0Z Z0m0a0Z0 0ZPMBZ0Z Z0Z0Z0Z0 PO0Z0OPO Z0ARZRJ0 a
0Z0ZrZ0j ZpZ0Z0lp 0Z0ZpZ0Z Z0MpOpZb 0ZnL0O0Z Z0Z0Z0Z0 rO0ZPSBO Z0S0Z0J0 a
3218 8
Liquidation
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0sbZ0akZ l0Z0Z0Zr pZ0o0ZnZ A0ZPo0O0 NZ0ZPZnZ Z0Z0ZBZ0 0O0L0MPZ S0S0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3223 8 7 6 5 4 3 2 1
3226
0sbZnZnj orZ0l0ap 0Z0o0opZ ZNoPZ0Z0 BZPZPA0Z ZRZNZ0Z0 PZ0L0ZPO Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3228
0Z0s0skZ o0l0Z0Zp 0ZpZ0ZpZ Z0ZnZnM0 NZ0Z0Z0L Z0Z0Z0ZP PO0Z0ZPZ Z0Z0SRJ0 a
c
0Z0lrZkZ ZpSbZpa0 0Z0o0ZpZ ZNZPZ0Z0 0Z0Z0L0Z Z0Z0ZNZ0 0Z0ZrOPO Z0S0Z0J0 a
3225 8
b
3227
rZbZ0ZkZ o0Z0l0Z0 0Z0o0m0m ZNoPo0Zp 0ZPZPo0Z ZRZNZPZ0 PL0ZBZ0O Z0Z0Z0ZK a
rZ0ZnZrj opZbl0Z0 0Z0o0Z0Z ONZPo0op 0ONZPo0m Z0L0ZPZP 0ZRZBZPZ Z0S0ZKZ0 a
3224 8
Liquidation
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0skZ o0Znmpap 0ZpZbZpZ Z0Z0o0A0 0lPZPZ0Z ZNM0Z0Z0 PO0ZBZPO S0Z0LRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3229 8 7 6 5 4 3 2 1
3232
0sbl0snj Z0Z0Z0Zp 0o0o0Zpa ZPZPopZn NZNZPZ0Z Z0Z0APZ0 0Z0ZBZPO ZRZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3234
0Z0s0skZ opZ0l0a0 0ZpobopZ Z0Z0Z0Op 0ZPAPOnZ ZPM0Z0Z0 PZ0LBZPZ Z0ZRS0J0 a
c
0Z0ZrZkZ Zpo0Z0s0 0Z0o0Z0L o0ZPl0Z0 0ZPZ0ZnO Z0MpA0Z0 PO0J0Z0Z Z0Z0ZRS0 a
3231 8
b
3233
0Z0Z0s0j Z0ZRL0ap 0ZpZ0ZpZ o0Z0l0Z0 0ZPZpZ0Z ZPZ0A0ZP PZ0Z0O0Z Z0Z0Z0J0 a
0ZrZ0skZ l0Z0Zpa0 0Z0o0Z0Z o0ZPoNZp NZ0ZPm0Z Z0Z0ZpZ0 0O0L0SPO S0Z0Z0ZK a
3230 8
Liquidation
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0ZkZ opZ0Zpa0 0l0o0Z0o ZBZPZ0on 0Z0M0ZPZ Z0M0ZPZ0 PO0L0ZPZ Z0J0S0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3235 8 7 6 5 4 3 2 1
3238
0Z0ZrZkZ ZpZ0ZpZp 0ZpSbZpZ Z0Z0Z0Z0 0LPZPOqZ Z0Z0Z0O0 rZ0Z0Z0O Z0M0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3240
rZ0Z0ZkZ ZpZbZnZp 0lpo0ZpZ ZPZ0Z0Z0 0ZPM0O0Z ZQZ0Z0OP 0Z0ZRZBJ Z0Z0Z0Z0 a
c
rZ0ZrZkZ opZ0Zpap 0Z0Z0ZpZ Z0ZqZbZ0 0ZNZpZ0Z ZPZ0L0ZP PZNZ0OPZ Z0ZRZRJ0 a
3237 8
b
3239
bZrZ0ZkZ o0s0lpo0 0opZ0Z0o Z0ZpZ0Z0 QZ0OnZ0Z Z0M0OBZP PORZ0OPZ Z0S0Z0J0 a
rZ0s0ZkZ oqZ0Zpop 0o0apm0Z Z0Z0Z0Z0 0ZPM0Z0L ZPZ0Z0Z0 PA0Z0OPO Z0ZRS0J0 a
3236 8
Liquidation
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0s0j opo0l0Z0 0ZnZ0Z0O Z0ZpoBL0 0Z0Z0ZPZ Z0Z0Z0Z0 POPZ0Z0Z Z0J0ZRZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3241 8 7 6 5 4 3 2 1
3244
0Z0srZkZ o0m0lpo0 0o0o0m0o ZPoPZ0Z0 PZNZPO0Z Z0MQZ0ZP 0Z0Z0ZPZ Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3246
rZblnskZ o0Z0Zpop 0onopZ0Z Z0o0Z0Z0 0ZPOPZ0Z O0OBZ0Z0 0Z0ZNOPO S0AQZRJ0 a
c
0Zrs0ZkZ Zponopa0 qZ0Z0mpo o0Z0Z0Z0 0ZNO0Z0Z OPZNOPO0 0AQZ0ZKO Z0SRZ0Z0 a
3243 8
b
3245
0sbZkZ0s opmqa0op 0ZnZ0o0Z Z0o0o0Z0 QZ0Z0Z0Z O0M0ONO0 0O0O0OBO S0ARZ0J0 a
rZbl0skZ opZ0Z0a0 0Z0o0m0o Z0o0oPZ0 0ZPm0Z0Z Z0MBZ0ZN PO0Z0ZPO S0AQZRJ0 a
3242 8
Advantage in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZqZka0s opZnopop 0mpZ0Z0Z Z0ZPZ0Z0 0Z0ZPA0Z ZQM0ZPZ0 PO0Z0O0O Z0ZRJBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3247 8 7 6 5 4 3 2 1
3250
rZbZrZkZ ZpZ0Zpop pZ0o0anl Z0oPZ0Z0 PZ0ZPO0Z Z0ZBZ0ZP 0OQZ0ZPA Z0Z0SRMK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3252
0ZrZ0l0s opjnanZp 0Z0o0Z0Z Z0oPZ0ZP 0ZPZPS0Z Z0M0ZNZ0 PO0AQZ0Z Z0J0Z0S0 a
c
rZ0l0mkZ opa0Zpo0 0ZpZ0m0Z Z0Z0ZbZr 0Z0Z0O0Z O0M0ONZP BOQA0ZPZ S0Z0ZRJ0 a
3249 8
b
3251
rZ0ZrZkZ Zblnapop popo0m0Z Z0Z0o0Z0 0ZPOPZ0A Z0M0ZNZ0 POQZBOPO Z0SRZ0J0 a
0Z0ZkZrZ ZbZrZ0Z0 0mpoNo0Z ZpZ0ZPo0 0O0ZPZPZ Z0M0Z0JR 0ZPZ0Z0Z Z0Z0Z0ZR a
3248 8
Advantage in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ ZpZ0Zpop pZnZ0m0Z Z0Z0o0Z0 0ZPo0Z0Z M0Z0Z0O0 PO0LPOBO S0A0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3253 8 7 6 5 4 3 2 1
3256
rZ0Z0skZ opZbapop 0lnZpZ0Z Z0ZnO0Z0 0Z0O0Z0Z O0MBZNZ0 0O0Z0ZPO S0AQZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3258
0s0Z0skZ o0lpZ0mp bo0ZpZpZ m0Z0OpM0 0LPO0O0Z O0Z0A0Z0 0Z0ZBZPO ZRS0Z0J0 a
c
rZ0Z0skZ ZpZ0Z0Zn nZpo0Zpa Z0ZPoplp pOPZPZ0Z O0M0ZPO0 0S0M0A0O Z0ZQZBJ0 a
3255 8
b
3257
rZ0Z0skZ o0o0mpop 0o0Z0ZnZ Z0Z0Z0Z0 0Z0OPZ0Z l0O0ZQA0 PZ0ZBO0O ZRZ0J0ZR a
rZ0lrZkZ o0o0Zpo0 0o0o0mno Z0Z0oNZ0 0ZPOPZ0Z Z0OQZ0Z0 PZ0A0OPO Z0Z0SRJ0 a
3254 8
Advantage in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ Zpl0opa0 pZ0o0mpo O0oPm0Z0 0ZPZPZ0A Z0M0Z0Z0 0OQMBOPO S0Z0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3259 8 7 6 5 4 3 2 1
3262
0s0lkZ0s Z0Z0a0op pZnobZ0Z ZpZ0o0Z0 0Z0ZBZ0Z M0Z0A0O0 POPZ0O0O S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3264
0Z0Z0Z0s Z0Zka0Z0 pZbopo0Z Zpl0Z0Zp 0Z0ZPZrZ Z0ZBM0ZQ POPZ0ZPO ZKZRS0Z0 a
c
rZblrZkZ opZ0Zpap 0ZpZ0ZpZ Z0ZnZ0Z0 0Z0oNZ0Z OQZPZNO0 0O0ZPOBO Z0S0S0J0 a
3261 8
b
3263
rZbZ0skZ Z0l0a0o0 pZ0opm0o Zpm0Z0Z0 0Z0MPZ0A Z0MBZ0ZQ POPZ0ZPO ZKZRZ0ZR a
rZ0Z0skZ Zpo0apo0 0Z0o0Z0o o0mPZ0Z0 qZPZPO0O Z0Z0ANZ0 PO0ZQZ0Z Z0JRZ0ZR a
3260 8
Advantage in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ o0Z0mpap 0onZ0ZpA Z0opZ0Z0 0Z0Z0Z0Z Z0MPZNO0 PO0ZPOBO S0L0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3265 8 7 6 5 4 3 2 1
3268
rZ0Z0Z0s Z0Z0jpZp pZ0lba0Z ZpZpo0Z0 0Z0Z0Z0Z Z0OBL0Z0 PONZ0OPO S0Z0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3270
rZ0ZrZkZ opZ0lpo0 0ZpZ0Z0o Z0Z0ZbZ0 0Z0OnA0Z Z0Z0Z0O0 PZ0ZPOBO ZRL0ZRJ0 a
c
0ZbZrskZ o0o0Zpo0 0o0o0l0o Z0mPZ0Z0 0ZPZPo0Z Z0O0MRO0 PZBL0ZPZ Z0Z0S0J0 a
3267 8
b
3269
rZblrZkZ Z0Z0Zpop 0Z0Z0m0Z o0ZPZ0Z0 0apZPO0Z Z0M0Z0ZP 0ABZ0ZPZ S0ZQZRZK a
0Z0lrskZ obZ0Z0op 0onopm0Z Z0Z0Z0A0 0ZPOPZ0Z Z0ZBZ0Z0 PZNZQZPO Z0Z0SRJ0 a
3266 8
Advantage in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0ZkZ opZ0Zpop 0m0Zrm0Z Z0Z0Z0Z0 qZpOPZ0Z Z0O0Z0O0 0Z0LRZ0O ZBA0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3271 8 7 6 5 4 3 2 1
3274
0Zrl0skZ obZ0Z0op 0o0Zpm0Z m0Z0Z0Z0 0Z0OPZ0Z O0ZBL0Z0 0A0Z0MPO S0Z0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3276
0sbZ0Z0j opZpZ0op 0Z0Z0s0Z Z0ZBZpZ0 0ZPO0Z0Z O0Z0Z0O0 0Z0ZPZ0O Z0JRZRZ0 a
c
rZ0lrmkZ opZ0Z0Zp 0ZpmbapZ Z0ZpMpZ0 0Z0O0A0Z Z0MBOPZP POQZ0ZPZ Z0Z0SRJ0 a
3273 8
b
3275
0Z0ZrskZ oqm0m0op 0o0ZpZ0Z Z0o0ZpZ0 0Z0OPO0Z O0OQZNZ0 0A0Z0ZPO Z0Z0SRJ0 a
rm0ZkZ0s Z0o0lpa0 pobm0Zpo Z0Z0o0Z0 0Z0ZPZ0Z ZBOQANZ0 PO0Z0OPO S0ZRZNJ0 a
3272 8
Advantage in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZrZ0ZkZ opZ0opap 0Z0oqmpZ Z0Z0Z0Z0 0ZPAPO0Z ZPM0Z0Z0 PZ0ZQZPO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3277 8 7 6 5 4 3 2 1
3280
rZ0l0ZkZ opZborap 0Zno0Z0Z Z0ZNZ0Z0 0ZPM0OpZ Z0Z0A0Z0 PO0L0ZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3282
0ZrZ0ZkZ opZqZ0o0 0Z0Z0o0Z ZPZpmPZ0 PZ0arZ0Z Z0Z0Z0ZP RZ0Z0ZPZ ZQANZRZK a
c
rmblkZ0s o0Z0apZ0 0o0ZpZpZ Z0opOnZ0 0Z0O0O0o Z0ZBZNZP POPZQAPZ S0ZNZRJ0 a
3279 8
b
3281
rZ0l0s0Z opZ0Z0jp 0Zbo0ZpZ Z0ZBonZ0 0ZPZ0Z0Z Z0M0Z0Z0 PO0L0OPO S0Z0S0J0 a
rZ0Z0skZ opo0Zpop 0ZbZ0m0Z Z0Z0l0Z0 0Z0ZPZ0Z Z0MBL0ZP PO0Z0OPZ Z0JRZ0ZR a
3278 8
Advantage in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0srZkZ o0l0Zpo0 0Z0a0m0o Z0Z0ZbZ0 0ZnZ0Z0Z Z0ZNZNZP PZPZ0OPZ S0AQSBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3283 8 7 6 5 4 3 2 1
3286
0s0ZrZkZ obZqZpo0 0o0o0m0o ZPoPZ0Z0 0Z0ZPO0Z ZPL0Z0OP 0Z0Z0MBZ S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3288
rZ0lrmkZ obZ0apop 0o0Z0Z0Z Z0opM0A0 0Z0OnO0Z Z0M0O0Z0 PO0Z0ZPO ZBSQZRJ0 a
c
0ZrsnZkZ ZqZ0opap po0o0ZpZ Z0Z0Z0Z0 PZPAPZ0Z ZPM0ZPO0 0Z0L0ZKO Z0SRZ0Z0 a
3285 8
b
3287
0s0lrZ0j Zpmnopap pZ0o0ZpZ O0oPZ0Z0 0ZBZPO0Z Z0M0Z0ZP 0OPAQZPZ S0Z0ZRJ0 a
rZ0s0ZkZ opZ0a0op nZnZbo0Z l0o0o0Z0 NZ0Z0Z0Z APZPM0O0 PZ0ZPOBO Z0SQZRJ0 a
3284 8
Advantage in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ obZnZpZp 0o0ZpapZ Z0Z0Z0Z0 0Z0OPA0Z Z0ZBZNZ0 PZ0ZQOPO S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3289 8 7 6 5 4 3 2 1
3292
0Z0s0skZ obZnl0op 0Z0apm0Z ZPopZ0Z0 0Z0Z0Z0Z ZPM0ONZ0 PAQZBOPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3294
0ZrlrZkZ o0Z0Zpop bZnZ0m0Z Z0opZ0Z0 0Z0Z0Z0Z O0O0OPM0 0ZBZ0ZPO S0AQS0J0 a
c
rmbl0skZ ZpZ0opap 0ZpZ0ZpZ ZPZ0Z0Z0 0Z0OPZ0Z Z0M0ANZP 0ZQZ0OPZ ZRS0Z0J0 a
3291 8
b
3293
rZ0l0skZ obo0anop 0Z0Z0o0Z Z0Z0o0Z0 0Z0Z0Z0Z Z0Z0ANZ0 POPMQOPO S0Z0ZRJ0 a
rZ0ZnskZ obZqopap 0o0onZpZ ZNZ0Z0Z0 0ZPZPZ0Z Z0M0APZ0 PO0LBZPO Z0SRZ0J0 a
3290 8
Advantage in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0ZkZ0s opo0lpap 0Z0o0mpZ Z0Z0ZbZ0 0ZPOpZ0Z Z0M0O0Z0 POQMBOPO S0A0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3295 8 7 6 5 4 3 2 1
3298
0s0ZrZ0Z ZpZnlpjn pZ0o0Zpo O0oPZ0Z0 0ZNZPOPZ Z0MQS0ZP 0O0Z0Z0Z Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3300
rZ0Z0s0Z o0m0l0jp 0Z0o0Z0Z ZboPZ0o0 0ZNZPo0Z Z0Z0Z0Z0 0O0ZBOPO S0ZQS0J0 a
c
0ZqZka0s s0ZnZpZp pZpZpo0Z O0Z0Z0Z0 0o0OPZ0Z ZPo0ZNZ0 0Z0ZBOPO S0ZQZRJ0 a
3297 8
b
3299
rZ0ZrZkZ ZbmqZpan pZ0o0ZpZ ZpZPZ0Zp 0ZpZPO0A O0M0ZBZP 0OQM0ZPZ Z0ZRS0J0 a
rZbZ0skZ o0Z0Z0ap 0ZnZpZpZ lpZ0ZpZ0 0ZpOPO0Z Z0O0A0Z0 PZBZNZPO Z0SQZRJ0 a
3296 8
Breakthrough in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0lnskZ o0Z0Zpap 0Z0o0ZpZ ZboPZ0Z0 0Z0ZPO0Z Z0M0Z0Z0 0O0M0ZPO S0AQS0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3301 8 7 6 5 4 3 2 1
3304
0sblrZkZ Z0m0Zpa0 pZ0o0mpo ZpoPZ0Z0 PZ0ZPO0A Z0M0Z0ZP 0OBZNZPZ S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3306
ns0Z0Zrj ZpZ0onZp pZ0o0opZ l0oPZ0Z0 PZPZPObO ZPMBZNZ0 0L0Z0ZPZ S0Z0ZRJ0 a
c
0Zrl0skZ o0Z0Zpop 0obZpa0Z m0Z0Z0Z0 0Z0OPZ0Z O0ZBZNZ0 0A0ZQOPO Z0ZRS0J0 a
3303 8
b
3305
0sbl0skZ Z0m0opap po0o0mpZ Z0oPZ0Z0 PZPZPA0Z Z0M0ZNO0 0O0Z0OBO S0ZQZRJ0 a
rZ0l0skZ obZ0Zpap 0o0ZpZ0Z m0Z0Z0Zp 0Z0OPZ0Z Z0ZBANZ0 PZ0Z0OPZ Z0SQZRJ0 a
3302 8
Breakthrough in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrZkZ Z0anZpop pZqZ0m0Z ZpZpZ0Z0 0ZpO0Z0M O0M0OPO0 0O0ZQZ0O ZBARZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3307 8 7 6 5 4 3 2 1
3310
rZrZ0akZ Zbl0Zpo0 0Zpo0m0o o0ZPoNZ0 BZPZPZ0Z Z0Z0ZNZP PZ0Z0OPZ Z0SQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3312
0Z0ZrmkZ ZbZ0spZp 0o0o0lpZ ZPZpZ0Z0 0Z0O0Z0Z A0Z0OPO0 0Z0L0ZNO Z0Z0SRJ0 a
c
rZ0lkZns Z0o0Z0ap pZpo0opZ Z0Z0Z0Z0 0Z0LPAbZ Z0M0ZNZ0 POPZ0OPO Z0JRZ0ZR a
3309 8
b
3311
rZbZ0skZ opZ0lpap nZpo0mpZ Z0Z0o0A0 0ZPOPZ0Z Z0M0ZNZ0 PO0ZBOPO S0ZQS0J0 a
rZ0Z0ZkZ o0Z0Z0op 0onZrm0Z Z0ZpZpZq PZpO0Z0Z A0O0OPO0 0ZQMRZ0O Z0Z0S0J0 a
3308 8
Breakthrough in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrmkZ o0l0Zpap 0opo0ZpZ Z0Z0o0Zn 0ZPOPZ0Z ZPZ0ZNO0 PAQM0OBO Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3313 8 7 6 5 4 3 2 1
3316
rZ0ZrZkZ Z0l0Zpa0 po0o0mpo Z0ZPZ0Z0 PZpZPO0Z Z0M0ZQZ0 0O0M0ZPO Z0Z0SRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3318
rZblns0Z Zpo0Z0jp pZ0o0ZnZ ZNOPo0o0 0ONZPo0Z Z0Z0ZPZ0 PLRZBZPO Z0Z0ZRZK a
c
rZ0lns0j Z0ZbZpZn 0S0o0apZ o0oPo0Zp PZPZPZ0Z Z0MBAPO0 0Z0L0ZNO ZRZ0Z0J0 a
3315 8
b
3317
rZbl0skZ opo0mpa0 0Z0o0Z0o Z0OPZ0o0 0O0ZPo0Z ZQM0ZNZ0 PZ0ZBOPO Z0ZRZRJ0 a
rZ0Z0snj Zpobl0ap 0Z0o0ZpZ Z0OPopZ0 0ONZPm0Z Z0MBAPZ0 0ZQZ0ZPO ZRZ0ZRZK a
3314 8
Breakthrough in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ ZpZnlnap 0Zpo0opZ o0Z0o0Z0 0ZPOPZ0Z Z0M0ANZP POQZBOPZ Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3319 8 7 6 5 4 3 2 1
3322
rZblrZkZ ZponZnap 0Z0o0o0Z oNZ0o0o0 0ZPOPZ0Z Z0Z0ZNA0 POQZBOPO Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3324
rZbZ0skZ opZ0l0Zp 0Zpo0Z0m Z0ZPZpM0 0OPapOnZ Z0M0Z0Z0 PZ0ABZPO Z0SQZRZK a
c
0ZbZrZkZ s0Znl0mp po0o0opL Z0oPZ0Z0 PZPZPZPZ Z0MBZNZP 0O0Z0S0Z Z0Z0ZRJ0 a
3321 8
b
3323
rZbZ0skZ opZnl0Zp 0Zpo0opm Z0Z0o0Z0 0ZPOPZ0Z Z0M0ZNZP POQZBOPZ S0ZRZ0J0 a
rZ0ZrZkZ o0ZnZpan 0Z0o0ZpZ lpoPZ0O0 0Z0ZPO0Z Z0M0ZBZ0 PO0Z0Z0Z Z0SQZRAK a
3320 8
Breakthrough in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblrZ0Z opm0Zpak 0Z0opmpo Z0oPZ0Z0 0ZPZPZ0Z Z0MBANZP PO0L0OPZ S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3325 8 7 6 5 4 3 2 1
3328
rZ0l0skZ o0Z0Z0Z0 no0Z0Z0o Z0oPo0m0 0OPZPobZ O0ZBZ0Z0 0Z0ANZPZ ZRZ0LRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3330
rZ0Zka0s Z0ZbZ0Z0 pZ0opo0Z Z0l0Z0Zp 0o0MPZ0Z Z0MQZ0Z0 POPZ0ZPO ZKZRZ0ZR a
c
0sbZkZ0s Z0Znapop 0ZnZpZ0Z l0opO0Z0 0o0O0M0Z Z0OBZNZ0 PO0Z0OPO S0AQS0J0 a
3327 8
b
3329
0Z0s0Z0s Z0ZbjpZ0 pa0opo0Z Zpl0Z0Zp 0Z0MPO0O Z0O0Z0O0 PO0L0ZBJ Z0ZRZRZ0 a
rZbl0skZ ZpZ0a0op pZ0ZpZ0Z Z0Z0OpZP 0ZQO0O0Z Z0M0ANZ0 PO0Z0JPZ S0Z0Z0Z0 a
3326 8
Breakthrough in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lkZ0s o0ZnapZp 0onZpZpZ Z0opO0Z0 0Z0O0O0Z O0Z0ANZ0 0OPZNZPO S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3331 8 7 6 5 4 3 2 1
3334
rZ0ZkZ0s ZqZ0mpZp pZ0apZ0Z ZpZ0ZpZ0 0Z0O0Z0Z O0M0Z0ZQ 0O0ZNOPO S0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3336
rZ0lrZkZ ZbZ0Z0ap po0ZpmpZ Z0Z0Z0Z0 PZ0O0Z0Z ZPZBM0Z0 0A0Z0LPO Z0ZRZRJ0 a
c
rZblnZ0j opo0Z0ap 0Z0o0Zrm ZNOPo0o0 0ONZPo0Z Z0Z0ZPZ0 PARZBZPO Z0ZQZRJ0 a
3333 8
b
3335
0Zrlka0s opZnZpo0 0Z0ZpZ0Z Z0opO0Zp 0Z0O0Z0Z ZPZQA0M0 PZPZ0OPO S0ZRZ0J0 a
0Z0srZka o0ZbZpZp 0o0o0Zpl Z0ZPZ0Zn 0Z0ZPO0Z Z0ZBANZP PZ0L0ZPZ Z0ZRS0J0 a
3332 8
Breakthrough in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ Z0mqZpop pZ0o0Z0Z ZpoPZ0Z0 PZPZPO0Z Z0M0Z0ZP 0Z0Z0SPZ Z0SQZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3337 8 7 6 5 4 3 2 1
3340
rZ0ZrZkZ Z0ZnZpZp 0lNo0apZ o0mPZ0Z0 PZ0ZPO0Z ZpZ0Z0OP 0Z0Z0ABZ Z0SQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3342
0ZbZns0j L0Z0Zpop 0ZNo0l0Z ZNmPZ0Z0 0ZpZPZ0Z Z0Z0Z0O0 0Z0Z0OBO Z0Z0ZRJ0 a
c
rZnl0skZ opZ0apZ0 nZpZpZpZ Z0Z0Z0Op 0ZPONO0O Z0Z0A0ZB PO0ZQZ0Z Z0ZRZRJ0 a
3339 8
b
3341
rZ0ZkZ0s opZbapop 0Z0ZpZ0Z Z0ZpO0l0 0Z0L0Z0Z Z0MBZ0Z0 POPZ0ZPO ZKZRZRZ0 a
kZ0s0Z0s o0l0Zpo0 0Zpapm0o ZpZ0Z0ZP 0ZPO0Z0Z Z0A0ZNO0 PO0ZQO0Z ZKZRZ0ZR a
3338 8
Breakthrough in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zks0m0s ZpZ0ZqZ0 pZpmpo0Z Z0Z0Z0o0 PZPO0ZPZ ZPZRANZ0 0J0Z0O0Z Z0ZRL0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3343 8 7 6 5 4 3 2 1
3346
rZ0Z0j0s opm0Zpa0 0ZpZpZpZ Z0Z0Mbl0 0ZPO0Z0o ZBA0ZQZP PO0Z0OPZ Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3348
0Z0srakZ ZbZnlpop pZpZpZ0Z Z0Z0Z0O0 0opOPA0Z OnM0ZNLB 0O0Z0O0A Z0ZRS0J0 a
c
rZbZka0s ZpZ0opZp pl0o0mpZ Z0Z0Z0Z0 0Z0ZPO0Z ZPM0ZBZ0 0OPZ0ZPO S0AQJ0ZR a
3345 8
b
3347
0Z0ZrskZ Spo0l0o0 0Z0Z0ZnZ ZPm0opZp 0ZPo0Z0O ZNZPZNO0 0ZQZPOKZ ZRZ0Z0Z0 a
rZblkZns opZ0Zpap 0Zno0ZpZ ZBZ0Z0Z0 0Z0oPZ0Z A0Z0ZNZ0 0ZPZ0OPO SNZQS0J0 a
3344 8
Breakthrough in the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0lrZkZ o0Znopap 0ZpZbZpZ O0Z0Z0Z0 0ZPO0Z0Z ArZ0ZNMP 0Z0ZQOPZ S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3349 8 7 6 5 4 3 2 1
3352
rZ0Z0mkZ opl0spop 0ZpobZ0Z Z0Z0o0Zn 0ZPO0Z0Z Z0MBONZP POQZ0OPZ Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3354
0ZrlrZkZ ZbonZpa0 pZ0o0mpo ZpZ0o0Z0 PO0OPZ0Z ZNO0ZNZP 0ABZ0OPZ SQZ0S0J0 a
c
rZ0ZrZkZ opZqZpo0 0Zba0mno Z0Zpo0Z0 0Z0Z0Z0Z ZPZPMNO0 PARZPOBO L0S0Z0J0 a
3351 8
b
3353
0Z0s0skZ Z0l0apop pZno0m0Z ZpZ0o0Zb 0Z0ZPZ0Z Z0O0MNZP POBZ0OPZ S0AQS0J0 a
rZ0Z0skZ Z0Zqapop pZ0Z0ZbZ ZpZpO0Z0 0Z0OnZPZ ZBZ0A0ZP PO0M0Z0Z S0ZQZRJ0 a
3350 8
Blowing up the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lkZ0s opZnZ0op 0Z0apZ0m Z0ZpZpZb 0Z0O0Z0Z ZQZ0ZNOP PO0MPOBZ S0A0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3355 8 7 6 5 4 3 2 1
3358
qZrZ0ZkZ Zbs0ZpZ0 pZ0o0Zpo Zpm0o0a0 0Z0mPZ0Z OPZBZ0ZP 0APM0OPZ ZNSQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3360
rZblnskZ o0Z0m0ap 0Zpo0ZpZ Z0Z0opZ0 0OPZPZ0Z Z0M0ZNZ0 PZ0ABOPO Z0SQZRJ0 a
c
rZbZ0s0j opZ0Zqa0 0Zpo0Zpo Z0ZPonZ0 0ZPZNZ0O ZQZ0ZNO0 PO0ZBOKZ S0Z0Z0ZR a
3357 8
b
3359
rZ0lrakZ ZbonZpop pZ0o0m0Z ZpZ0o0Z0 0O0OPZ0Z O0O0ZNZP 0ZBM0OPZ S0AQS0J0 a
rZ0l0skZ o0Z0mpap 0ZpobmpZ Z0Z0o0A0 0ZPZPZ0Z Z0M0ZNZ0 PO0ZBOPO S0ZQZRJ0 a
3356 8
Blowing up the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZrakZ ZblnZpop po0opZ0Z Z0Z0Z0O0 PZnMPO0O Z0M0Z0Z0 0OPZQZBZ Z0ARZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3361 8 7 6 5 4 3 2 1
3364
0sqZrakZ ZbZ0Zpop 0Z0opZ0Z Zpm0Z0O0 0Z0APO0Z Z0Z0Z0M0 0OPZ0ZBO S0ZQZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3366
rZbZ0skZ opZna0op 0ZnZpo0Z Z0ZpO0Z0 0Z0O0O0Z ZPZBZNZ0 0O0ANJPO S0Z0Z0ZR a
c
rZ0ZkZrZ ZplbapZ0 pZ0opm0Z Z0Z0m0o0 0OPMPZPZ Z0M0APZ0 PZ0LBZ0Z Z0S0J0ZR a
3363 8
b
3365
rZ0lka0s o0ZnZpop no0ZpZ0Z Z0opO0Z0 0Z0O0Z0Z Z0Z0Z0Z0 POPMNOPO S0AQZRJ0 a
rZ0lrZkZ o0Z0Zpap bonopmpZ Z0o0Z0Z0 0ZPOPZ0Z ZPM0APO0 PZ0LNJ0O Z0ZRZBZR a
3362 8
Blowing up the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ Zbo0apop pZ0o0m0Z ZpZ0Z0M0 0ZnZPO0Z Z0O0Z0ZP POBZ0ZPZ SNAQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3367 8 7 6 5 4 3 2 1
3370
rZ0l0skZ ZpZ0Zpap pZ0Zpm0Z Z0ZpAbo0 0ZpO0Z0Z Z0M0OBZ0 POPZQOPO S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3372
0s0ZbskZ opmqZ0op 0ZpZpZ0Z Z0OpZpZ0 PZ0O0O0Z Z0L0OPZ0 0O0Z0MBO S0Z0ZRJ0 a
c
rZbZ0skZ opZnZ0op 0lnZpa0Z Z0ZpZ0Z0 0Z0O0O0Z Z0ZBZNJ0 PO0ZNZPO S0AQS0Z0 a
3369 8
b
3371
rZ0s0ZkZ Zbl0apo0 po0opmno Z0Z0Z0Z0 PZ0ZPZ0Z ZNM0APZ0 0OPLBZPO Z0ZRZRZK a
rZ0ZqskZ opZbZ0op 0Znapm0Z Z0ZpZ0A0 0Z0O0Z0Z Z0ZBZNM0 PO0Z0OPO SQZ0ZRJ0 a
3368 8
Blowing up the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZqZrZkZ oponZpa0 0Z0Z0Zpo ZPZ0onZ0 PZPoNZ0Z A0ZPZNOb 0Z0ZPO0O S0ZQS0JB a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3373 8 7 6 5 4 3 2 1
3376
0s0lkZ0s opZnZ0op 0Zpa0Z0m Z0ZpZpZ0 0Z0O0ZbZ ZQZ0ZNO0 PO0MPOBO S0A0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3378
0Zbl0skZ s0Z0mpop pZ0o0m0Z O0Z0oPZ0 0o0ZPZ0Z ZNZBZ0Z0 0OPZQZPO S0ZNZRJ0 a
c
rZ0ZrZkZ Zbl0apZp ponopmpZ Z0Z0Z0Z0 0ZPZPOPZ ZPM0M0Z0 PA0ZQZ0O ZBZRZRJ0 a
3375 8
b
3377
0Zks0a0s Zpo0m0op pZ0lbo0Z Z0o0o0Z0 0Z0ZPZ0Z Z0OPANZ0 PO0MQOPO S0Z0ZRJ0 a
rZ0ZrZkZ oblnZpap 0o0opmpZ Z0Z0Z0Z0 0ZPMPO0Z ZPM0Z0Z0 PA0ZQZPO ZBZRZRZK a
3374 8
Blowing up the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ Zpl0Zpap pZ0opZpZ Z0Z0m0A0 0ZPZPZnZ Z0M0Z0Z0 POBMQOPO S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3379 8 7 6 5 4 3 2 1
3382
rZbZrakZ Z0l0Zpop pZpo0m0Z Z0m0Z0Z0 0ZBMPZ0Z O0M0APZP 0OQZ0ZPZ Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3384
rZbZrZkZ Zplnmpap 0ZpZ0ZpZ Z0Zpo0Z0 PZ0ZPZ0Z Z0ZPZNO0 0APM0OBO S0ZQS0J0 a
c
rmbl0skZ opZpZ0op 0Z0ZpZ0Z Z0oPOpZ0 0ZPZnO0Z Z0A0Z0O0 PO0Z0Z0O S0ZQJBMR a
3381 8
b
3383
0Z0srakZ ZqZnZpZp pZbopZpZ o0Z0Z0O0 PZ0ZPO0Z ZPZ0Z0ZR 0ZPS0ZBO Z0ZNL0AK a
0s0l0skZ Z0ZbZpap pZno0mpZ ZpZ0o0Z0 0O0OPZ0Z ONM0APZ0 0Z0L0ZPO S0Z0JBZR a
3380 8
Blowing up the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0ZkZ o0ZnZpo0 bZpZpm0o l0ZpZ0Z0 0ZPO0Z0Z ZQS0ONO0 PZ0M0O0O Z0Z0ZBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3385 8 7 6 5 4 3 2 1
3388
rmblrZ0Z ZpZ0Zpak 0Zpo0mpo Z0Z0o0Z0 0OPZPZ0Z Z0MPZNO0 0Z0A0OBO ZRL0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3390
0j0s0s0Z oplbZpZ0 0ZnZpZ0Z Z0LnO0Z0 0Z0oNO0Z O0Z0Z0Z0 0ZPZ0ZPO ZRAKZBZR a
c
rZbZ0skZ opl0apop 0Znopm0Z O0Z0Z0Z0 0ZBZPO0Z ZNM0Z0Z0 0OPZ0ZPO S0AQZRJ0 a
3387 8
b
3389
0s0Z0s0j opoqZ0a0 0Z0obZno ZPZ0opo0 PZPZ0O0Z Z0ZPO0O0 0ZQZNZBO ZRA0ZRJ0 a
rZ0lrakZ Z0obZpo0 pZ0o0m0o mpZPo0Z0 PZ0ZPZ0Z Z0O0ZNZP 0OBM0OPZ S0AQS0J0 a
3386 8
Blowing up the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0j0s ZbonZ0o0 po0a0Z0Z Z0Z0ZpZ0 0Z0OpZqZ O0M0O0Op 0OQA0O0O Z0JRZRZB a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3391 8 7 6 5 4 3 2 1
3394
rZ0lrZkZ ZbZnapop pZ0o0m0Z ZpZ0o0Z0 PO0OPZ0Z Z0Z0ZNZP 0ZBM0OPZ S0AQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3396
rZ0lrakZ Zbo0ZpZp pZno0mpZ ZpZ0o0Z0 0Z0OPZ0Z ZPO0ZNZP PZBM0OPZ S0AQS0J0 a
c
rZbZkZ0s Zplnapo0 pZ0opm0o Z0Z0Z0Z0 0Z0MPOPO Z0M0ZBZ0 POPZ0Z0Z S0AQZRJ0 a
3393 8
b
3395
rZ0lrZkZ Zbo0Zpap pZno0mpZ ZpZ0o0Z0 0Z0OPZ0Z O0O0ZNZP 0OBZ0OPZ S0AQSNJ0 a
rZ0ZrZkZ Zpl0apop pZbopm0Z O0Z0ZPZ0 0m0MPZPZ Z0MBA0Z0 0OPZ0Z0O S0ZQZRZK a
3392 8
Blowing up the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ Zbl0apop pZnopm0Z ZpZ0Z0Z0 0Z0ZPOPZ O0M0ZBZ0 0OPZNZ0O S0AQZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3397 8 7 6 5 4 3 2 1
3400
rZ0ZkZ0s Zbl0apop pZnopm0Z ZpZ0Z0Z0 0Z0ZPOPZ ONMBZ0Z0 0OPZQZ0O S0A0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3402
rl0ZkZ0s ZpZbapop pZnopm0Z Z0Z0Z0Z0 0Z0MPOPZ Z0M0A0Z0 POPZBZ0O S0ZQJ0ZR a
c
rZbZ0skZ Zpl0apop pZnopm0Z Z0Z0Z0Z0 0Z0ZPOPZ Z0M0Z0ZP POPZNZBZ S0AQZRJ0 a
3399 8
b
3401
0Zrs0ZkZ Zbl0apop pZnopm0Z ZpZ0Z0Z0 0Z0ZPZPZ OPM0Z0ZP 0APLNOBZ Z0ZRZRJ0 a
0Zrs0ZkZ oqZ0apop 0obopm0Z Z0Z0Z0Z0 PZ0LPOPZ ZPM0Z0ZP 0APZ0ZBZ Z0ZRZRZK a
3398 8
Blowing up the centre
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZka0s ZplbZpop pZ0opm0Z Z0Z0Z0Z0 0Z0SPOPZ Z0M0AQZ0 POPZBZ0O Z0J0Z0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3403 8 7 6 5 4 3 2 1
3406
bsqZrakZ Z0ZnZpZp ponopZpZ Z0Z0Z0Z0 0ZPZPO0Z Z0M0ABZ0 PONZQZPO Z0SRZ0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3408
rZ0ZrakZ ZblnZpZp po0opmpZ Z0Z0Z0Z0 0ZPZPO0L Z0MBANZ0 PO0Z0ZPO Z0ZRZRJ0 a
c
0l0srZkZ ZbZnapZp po0opmpZ Z0Z0Z0Z0 PZPMPO0Z ZPZ0Z0M0 0A0Z0ZPO ZBSQS0J0 a
3405 8
b
3407
0ZrZ0skZ ZblnapZp po0opmpZ Z0Z0Z0Z0 0OPMPO0Z Z0MBZ0Z0 PZ0AQZPO Z0S0ZRZK a
0lrZrZkZ ZbZnapop po0opm0Z Z0Z0Z0Z0 0ZPMPZ0Z ZPM0L0OP PA0Z0OBZ Z0S0ZRJ0 a
3404 8
Hedgehog
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0lkZ Z0snZpo0 pobopm0o Z0Z0Z0Z0 0OPLPZ0Z ONZ0ZPO0 0Z0M0Z0O Z0S0SBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3409 8 7 6 5 4 3 2 1
3412
rZ0ZnZkZ ZqZ0Zpo0 poropa0o Z0Z0Z0Z0 PZPZPZ0O ZPMRZPO0 0A0L0ZKZ Z0ZRZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3414
0ZrlrZkZ ZbZnapZp po0opmpZ Z0Z0Z0A0 0OPO0Z0Z O0MBZNZ0 0Z0Z0OPO Z0SQS0J0 a
c
0ZrZrZkZ ZbZqmpo0 po0opm0o Z0Z0Z0Z0 0OPO0Z0L ONMBZ0Z0 0Z0Z0OPO Z0ZRS0J0 a
3411 8
b
3413
0ZrlrZkZ obZnapZp 0o0opmpZ Z0Z0Z0Z0 0OPO0Z0Z O0MBZNZ0 0A0Z0OPO S0ZQS0J0 a
rZ0lrZkZ obZnapZp 0o0opmpZ Z0Z0Z0Z0 0OPO0Z0Z Z0MBZNZ0 PA0Z0OPO S0ZQS0J0 a
3410 8
Hedgehog
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ oblnapop 0o0opm0Z Z0Z0Z0Z0 0ZPO0Z0Z O0MBZNZ0 0O0Z0OPO S0AQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3415 8 7 6 5 4 3 2 1
3418
rZ0l0skZ ZbZnapop po0opm0Z Z0Z0Z0Z0 0ZPO0Z0Z ZPMBZNZ0 PA0Z0OPO S0ZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3420
0Z0srZkZ Zbl0apon po0opZ0o Z0Z0m0Z0 0ZPZPZ0Z M0M0Z0AP PO0S0OPZ Z0ZQSBJ0 a
c
blrZrZkZ Z0Z0apop po0opm0Z Z0Z0m0Z0 0ZPZPZ0Z ZPM0APZ0 PZNL0ZPO Z0SRZBZK a
3417 8
b
3419
qZ0Zka0s sbZnZpop po0opm0Z Z0Z0Z0Z0 0ZPMPO0Z Z0M0A0O0 PO0Z0ZBO S0ZQZRJ0 a
0lrs0ZkZ ZbZ0Zpop ponopZ0Z Z0m0Z0L0 0ZPZPZ0Z Z0M0ZPZ0 PORZBZPO ZNZRZ0J0 a
3416 8
Hedgehog
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ ZbZ0lpop 0onopa0Z o0m0Z0Z0 0ZPZPZ0Z O0M0A0Z0 0OQZBOPO ZNZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3421 8 7 6 5 4 3 2 1
3424
0ZrZrZkZ Zblnapon po0opZ0o Z0Z0Z0Z0 0ZPZPOPO M0M0ABZ0 PO0Z0Z0L Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3426
0Zrs0akZ ZblnZpop po0opZnZ Z0Z0Z0Z0 0ZPZPO0Z Z0M0ZBA0 PO0MQZPO Z0ZRZRZK a
c
0lrZ0s0j ZbZnapop po0opm0Z Z0Z0Z0Z0 0ZPZPZ0Z O0M0APZ0 0O0L0ZPO ZNSRZBJ0 a
3423 8
b
3425
0lrZ0Zrj Z0ZnapZp pobopm0Z Z0Z0Z0o0 0ZPZPZ0Z ZPM0ZPZ0 PZNL0ZPO Z0SRZBAK a
0lrZrZ0j ZbZ0apo0 po0opm0o Z0m0Z0Z0 0ZPZPZ0Z L0M0ZPZ0 PONZ0ZPO Z0SRZBAK a
3422 8
Hedgehog
c
d
e
f
g
h
8 7 6 5 4 3 2 1
blrZrZkZ Z0Znapo0 po0opZno Z0O0Z0Z0 NO0ZPZ0Z ONZ0A0OP QZ0Z0OBZ Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3427 8 7 6 5 4 3 2 1
3430
bZrZ0ZkZ Zqsnapop po0opZ0Z m0Z0Z0Z0 0ZPZPO0Z M0M0A0Z0 PO0SBLPO Z0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3432
0s0lnZkZ Z0sbapop ponopZ0Z Z0Z0Z0Z0 0ZPZPZ0Z O0M0A0Z0 0O0MBOPO S0S0ZQJ0 a
c
0ZrZrZkZ Zblnapon po0opZ0o Z0Z0Z0Z0 0ZPZPZPO M0M0ZPL0 PO0ZBA0Z Z0ZRZRJ0 a
3429 8
b
3431
rZ0l0skZ ZbZ0Zpop ponopZ0Z Z0m0a0Z0 0ZPZPZ0Z M0M0APZ0 POQZ0ZPO S0ZRZBJ0 a
0s0Z0skZ Zblnapop po0opZnZ Z0Z0Z0Z0 0ZPZPO0Z ZQM0ANZ0 PO0ZBZPO Z0SRZ0J0 a
3428 8
Hedgehog
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ obZ0Zpop 0o0opl0Z Z0Z0m0Z0 0ZPZPZ0Z Z0M0Z0Z0 PO0L0OPO S0Z0SBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3433 8 7 6 5 4 3 2 1
3436
0ZrlnskZ ZbZ0apop po0opZ0Z Z0m0Z0O0 0ZPZPO0Z M0M0ABZ0 PO0Z0ZQO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3438
0s0ZkZ0s Zblnapo0 po0opm0o Z0Z0Z0Z0 0ZPZPO0Z M0M0ABZ0 PO0ZQZPO Z0S0ZRZK a
c
0Zrl0skZ obZnapop 0o0opZ0Z Z0Z0m0Z0 0ZPZPZ0Z Z0M0Z0A0 PO0M0OPO S0ZQSBJ0 a
3435 8
b
3437
0s0ZrZkZ ZqZ0apop pobopm0Z Z0Z0m0Z0 0ZPLPZ0Z Z0M0ZPZ0 PONZBAPO Z0SRZ0J0 a
0ZrZ0lrj Z0Zna0Zp pobopo0Z Z0Z0m0o0 0ZPSPZ0Z Z0M0M0AP POQZBOPZ Z0ZRZ0J0 a
3434 8
Hedgehog
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ ZbZ0Zpop ponopl0Z Z0m0a0Z0 0ZPZPZ0Z Z0M0A0O0 POQZBO0O ZNSRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3439 8 7 6 5 4 3 2 1
3442
0l0Z0skZ ZrZ0apop pobopm0Z Z0Z0Z0Z0 0mPZPA0Z M0M0Z0Z0 PO0LBOPO Z0SRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3444
0Zrs0ZkZ Z0l0apop pobopm0Z Z0Z0m0Z0 0ZPZPZ0Z Z0M0APZ0 PONLBZPO Z0SRZ0J0 a
c
0ZrlrZkZ ZbZ0apop ponopm0Z Z0Z0Z0Z0 0ZPZPZ0Z M0M0A0Z0 PO0Z0OPO S0ZQSBJ0 a
3441 8
b
3443
0s0ZqskZ ZbZ0apop po0opZ0Z Z0m0Z0Z0 0mPZPO0Z M0M0A0Z0 PO0LBZPO Z0SRZ0J0 a
0s0sbZkZ ZqZ0apZp po0opZpZ Z0Z0Z0Z0 0ZPZPZ0Z ZPZ0APL0 PZ0SBZPO Z0ZRZ0J0 a
3440 8
Hedgehog
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0lrs0ZkZ Z0Znapop pobopZnZ Z0Z0Z0Z0 0ZPZPZ0Z M0M0APZ0 PO0Z0LPO Z0SRZBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3445 8 7 6 5 4 3 2 1
3448
0lrarZkZ ZbZ0Zpop po0opmnZ Z0Z0Z0Z0 0OPZPZ0Z O0M0L0A0 0Z0M0OPO Z0S0SBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3450
rZ0ZkZ0s ZpZbapop pZ0opm0Z l0Z0Z0Z0 0ZPZPZ0Z Z0M0Z0O0 PO0ZQOBO S0A0ZRJ0 a
c
0Z0srZkZ Zbl0Zpap po0opZpZ Z0m0Z0Z0 0ZPZPO0Z ZPM0L0O0 PA0ZRZBO Z0ZRZ0J0 a
3447 8
b
3449
rZbZ0skZ Zpl0apZp pZ0opmpZ Z0m0ZPZ0 0ZPMPZ0Z Z0M0A0Z0 PO0ZBZPO Z0SQZRJ0 a
bZrs0ZkZ Z0lnapop po0opZ0Z Z0Z0Z0Z0 0ZPZPA0Z ZPM0Z0OP PZ0ZQOBZ Z0SRZ0J0 a
3446 8
Hedgehog
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrs0Z0Z jbl0mpo0 po0opZ0o Z0a0m0ZP 0ZPZPZPZ ONM0ZPA0 0O0LBZ0Z ZKSRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3451 8 7 6 5 4 3 2 1
3454
rZ0ZrakZ ZblnZpmp po0opZpZ Z0Z0Z0A0 0ZPZPO0Z Z0M0Z0Z0 PO0LBZPO Z0SRM0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3456
rZ0s0akZ ZblnZpZp po0opZpZ Z0Z0Z0Z0 NZPZPZ0Z ZPZ0A0ZP PZ0L0OPZ ZBSRZ0J0 a
c
rZbZ0skZ Z0lnZpap po0opZpZ Z0Z0Z0Zn 0ZPZPZ0Z Z0MBANZ0 PO0ZQOPO S0ZRZ0J0 a
3453 8
b
3455
rZ0s0mkZ Zbl0ZpZp po0opmpZ Z0Z0Z0Z0 0ZPZPZ0Z Z0M0ZNZ0 PO0LBOPO Z0SRZ0J0 a
rm0arZkZ Zbl0Z0op po0opm0Z Z0Z0Z0Z0 0ZPMPZ0Z Z0MBA0Z0 PO0ZQZPO Z0S0ZRJ0 a
3452 8
Hedgehog
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ ZpZblpap pZnopZpZ Z0Z0m0Z0 0ZPZPA0Z Z0M0LNZ0 PO0ZBOPO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3457 8 7 6 5 4 3 2 1
3460
0lrZrZkZ ZbanZpo0 po0opm0o Z0Z0Z0Z0 0ZPZPZPO Z0M0APZ0 PONZ0L0Z Z0SRZBZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3462
rZ0l0skZ ZbZnapop po0opm0Z Z0Z0Z0Z0 0ZPZPOPZ M0M0ZBZ0 PO0ZQZ0O S0A0ZRJ0 a
c
qZ0srZkZ ZbZnapop po0opm0Z Z0Z0Z0Z0 0OPZPA0Z ZNM0Z0OP PZ0ZQOBZ Z0SRZ0J0 a
3459 8
b
3461
rZ0lrZkZ ZpZ0apop pZbopm0Z Z0Z0Z0Z0 0ZPZPO0Z ZPMBZ0Z0 PA0ZQZPO S0Z0ZRJ0 a
rZbl0skZ ZpZnZpap pZ0opmpZ Z0Z0Z0Z0 0ZPMPZ0Z Z0MBAPZ0 PO0L0ZPO S0Z0ZRJ0 a
3458 8
Hedgehog, blowing up with d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rl0s0akZ obZ0Zpop 0onopm0Z Z0Z0Z0Z0 0ZPZPO0Z Z0M0ABZ0 PO0MQZPO Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3463 8 7 6 5 4 3 2 1
3466
qZrZrZkZ abZ0Zpop po0opm0Z Z0Z0m0Z0 0ZPZPZ0Z M0M0APO0 PORZBL0O Z0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3468
0Zrl0skZ obZ0apop 0o0opmnZ Z0Z0Z0Z0 0OPZPZ0Z O0M0Z0A0 0Z0MBOPO S0ZQS0J0 a
c
rZ0l0skZ ZbZ0apop po0opm0Z Z0Z0m0Z0 0ZPZPZ0Z M0M0APZ0 PO0LBZPO S0Z0ZRJ0 a
3465 8
b
3467
0s0s0ZkZ ZqZ0apop pobopm0Z Z0Z0m0Z0 0OPZPZ0Z Z0M0APZ0 PZ0MBLPO Z0SRZ0ZK a
rZ0l0skZ ZpZ0apop pZbopmnZ Z0Z0Z0Z0 0ZPZPO0Z ZPMBZ0Z0 PANZ0ZPO S0ZQZRJ0 a
3464 8
Hedgehog, blowing up with d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0lrZ0skZ ZbZnapop po0opm0Z Z0Z0Z0Z0 0OPLPZ0Z ZNM0APZ0 PZ0ZBZPO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3469 8 7 6 5 4 3 2 1
3472
rZ0lrZkZ ZbZnapop po0opm0Z O0Z0Z0Z0 0ZPMPZ0Z Z0M0APZ0 0O0LBZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3474
0Zrs0ZkZ ZqZ0apo0 po0opm0o Z0Z0Z0Z0 PZPZPA0Z ZPM0Z0O0 0Z0ZQOKO Z0ZRS0Z0 a
c
rZrZ0Z0j ZpZ0apop pZbopmnZ Z0Z0Z0Zq 0ZPZPZ0Z M0M0APZ0 PO0Z0LPO ZRZRZBJ0 a
3471 8
b
3473
0lrZrakZ ZbZnZpop po0opm0Z Z0Z0Z0Z0 0OPMPZ0Z O0M0APZ0 0Z0Z0LPO Z0SRZBJ0 a
rZrZbZkZ ZpZ0apop pZ0opmnZ l0Z0Z0Z0 0ZPZPZ0Z M0M0APZ0 PO0SBZPO ZRZQZ0J0 a
3470 8
Hedgehog, blowing up with d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrlrZkZ ZbanZpop po0opm0Z Z0Z0Z0Z0 0OPLPZ0Z O0M0Z0M0 0A0ZBOPO Z0ZRZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3475 8 7 6 5 4 3 2 1
3478
blrZrZkZ Z0ZnapZp po0opmpZ Z0Z0Z0Z0 0OPZPZ0Z ZNM0APZ0 PZRZ0LPO Z0S0ZBZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3480
0s0lrZkZ ZbZ0apop po0opm0Z Z0Z0m0Z0 0ZPZPZ0Z M0M0APZ0 PO0LBZPO Z0S0ZRZK a
c
bl0srakZ Z0ZnZpo0 po0opm0o Z0Z0Z0Z0 0ZPZPZ0Z O0M0APZ0 0O0MBLPO Z0SRZ0ZK a
3477 8
b
3479
0ZrlrZkZ ZbZnapop po0opm0Z O0Z0Z0Z0 0ZPMPZ0Z Z0M0APZ0 0O0LBZPO S0ZRZ0J0 a
bs0s0ZkZ Z0l0apop po0opm0Z Z0Z0Z0Z0 0mPZPZ0Z M0M0APZ0 PO0SBLPO Z0ZRZ0J0 a
3476 8
Hedgehog, blowing up with d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
bZrZrZkZ Z0l0apop po0opm0Z m0Z0Z0Z0 0OPZPO0Z M0M0ABZ0 PZ0S0ZPO Z0SQZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3481 8 7 6 5 4 3 2 1
3484
0Z0srZkZ Zbl0Zpap po0opmpZ Z0m0Z0Z0 0ZPZPZ0Z ZPM0L0OP PZNZROBJ A0Z0ZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3486
0ZrlrZkZ ZbZnZpap po0opmpZ Z0Z0Z0Z0 0OPZPOPZ ONMBA0ZP 0Z0ZQZ0Z Z0S0ZRJ0 a
c
0Z0srZkZ Zbl0Zpap po0opmpZ Z0Z0m0Z0 0ZPMPZ0Z ZPM0ZPZ0 PA0Z0LPO Z0S0SBJ0 a
3483 8
b
3485
rZbl0skZ ZpZnZpap pZ0opmpZ Z0Z0Z0Z0 0ZPMPZ0Z Z0M0A0Z0 PO0Z0OPO S0ZQSBJ0 a
rl0ZrZkZ ZbZnapop po0opm0Z Z0Z0Z0Z0 0ZPZPZ0Z MQM0APZ0 PO0ZBZPO Z0S0ZRJ0 a
3482 8
Hedgehog, blowing up with d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0lrZrakZ ZbZnZpop po0opm0Z O0Z0Z0Z0 0OPZPO0Z ZNMBA0Z0 0Z0ZQZPO Z0S0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3487 8 7 6 5 4 3 2 1
3490
0ZrZrakZ ZblnZpop po0opm0Z Z0Z0Z0Z0 0ZPZPZ0Z Z0M0APZP PONZ0LPZ Z0SRZBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3492
0Zrs0ZkZ Zbl0apo0 po0opmnZ Z0Z0Z0Zp PZPZPO0Z ZPM0ZNOP 0A0ZQZBZ S0ZRZ0J0 a
c
blrZrZkZ Z0anZpop po0opm0Z Z0Z0Z0Z0 0OPZPZ0Z ONM0APO0 0Z0ZBL0O ZRZRZ0J0 a
3489 8
b
3491
rZrZ0ZkZ ZqZ0apop ponopm0Z Z0Z0Z0Z0 PZPZPZ0Z ZPM0APO0 0Z0ZNZKO S0ZQZRZ0 a
0Zrs0ZkZ ZbZ0lpo0 po0opm0o Z0Z0Z0Z0 0ZPZPO0Z OPM0Z0OP 0Z0S0Z0J ZQS0ZBZ0 a
3488 8
Hedgehog, blowing up with d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0lrZrZkZ ZbZnapop po0opm0Z Z0Z0Z0Z0 0ZPMPZ0Z ZPM0APO0 PZ0ZQZBO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3493 8 7 6 5 4 3 2 1
3496
qZ0srakZ ZbZnZpop po0opm0Z Z0Z0Z0Z0 0ZPZPZ0Z ZPM0ZPZ0 PLNZ0ZPO Z0SRZBAK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3498
0ZrZrZkZ Zbl0apop po0opm0Z Z0m0Z0Z0 0ZPZPZ0Z Z0M0APZ0 POQZBZPO ZNSRZ0ZK a
c
rZ0lrZkZ ZbZ0apop po0opZ0Z Z0m0Z0Z0 0mPZPZ0Z M0M0APZ0 PO0LBZPO Z0ZRZRJ0 a
3495 8
b
3497
0l0ZrZkZ sbZ0Zpap po0opmpZ Z0Z0Z0A0 0ZPMPZ0Z Z0Z0Z0Z0 POBSQOPO Z0ZRZ0J0 a
0lrs0ZkZ ZpZ0Zpop pZbopmnZ Z0Z0Z0Z0 0ZPZPZ0Z Z0M0Z0ZP PONZ0OPZ Z0SQSBJ0 a
3494 8
Hedgehog, blowing up with d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0l0skZ obZrapop 0o0opmnZ Z0Z0Z0Z0 0ZPZPZ0O O0M0Z0A0 0O0MBOPZ Z0SQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3499 8 7 6 5 4 3 2 1
3502
0ZrZrZkZ ZbZ0Zpop poqopmnZ Z0Z0Z0Z0 0OPZPO0Z ZBS0ZQA0 PZ0M0ZPO Z0Z0S0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3504
0l0srZkZ ZbZ0apop po0opm0Z Z0Z0Z0Z0 0mPZPZ0Z ZPM0Z0O0 PANL0OBO Z0SRZ0J0 a
c
rZbl0skZ opZ0apop 0Znopm0Z Z0Z0Z0Z0 0ZPZPZ0Z Z0M0APZ0 PONZ0ZPO S0ZQJBZR a
3501 8
b
3503
bZrlrZkZ o0Z0apop 0onopm0Z Z0Z0Z0Z0 0ZPZPO0Z Z0M0A0O0 PO0L0ZBO SNS0Z0J0 a
0s0sbZkZ Z0Z0lpo0 0o0opa0Z oNm0Z0Z0 PmPZPZ0o ZPM0APZP 0Z0SBZPZ ZQS0Z0ZK a
3500 8
Hedgehog, blowing up with d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblrakZ ZpZnZpop pZ0opm0Z Z0Z0Z0Z0 0ZPMPZ0Z ZPZBZ0Z0 PA0M0OPO Z0SQZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3505 8 7 6 5 4 3 2 1
3508
0Z0s0l0Z o0ZrZpak 0onopmpZ Z0Z0Z0Zp 0ZPZPZ0Z ZPM0APOP PZ0SNL0Z Z0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3510
qZrZ0skZ ZbZnapop po0opm0Z Z0Z0Z0Z0 0ZPZPOPZ M0M0Z0Z0 PO0AQZBO Z0S0S0ZK a
c
rZ0s0ZkZ obm0Zpop 0o0opZ0Z Z0Z0Z0Z0 POPAPZ0Z Z0Z0ZPOB 0Z0Z0Z0O S0ZRZ0J0 a
3507 8
b
3509
blrs0ZkZ Z0Z0Zpop po0opmnZ Z0Z0Z0Z0 0OPZPO0Z O0S0ABO0 0Z0MQZ0O Z0ZRZ0ZK a
0s0s0ZkZ ZbZ0lpop 0Z0opa0Z o0m0Z0Z0 0mPZPZ0Z Z0M0APZ0 PO0Z0ZPO ZNSRLBJ0 a
3506 8
Hedgehog, blowing up with d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0lkZ obZrZpZp 0o0opapZ ZPZ0Z0Z0 PZPZPZ0Z Z0Z0APZ0 0Z0LBZPO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3511 8 7 6 5 4 3 2 1
3514
rZ0ZrZkZ Z0Z0Zpo0 0Zpa0Zno Z0ZpZ0Z0 0Z0O0Zbl Z0MBO0Z0 0ZQM0OPO ZRS0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3516
rZ0ZrZkZ Z0Z0Zpo0 0Spa0l0o Z0ZpZ0Z0 0Z0O0Zbm Z0MBO0Z0 0ZQM0OPO Z0Z0ZRJ0 a
c
rZblrZkZ opZ0apmp 0ZpZ0mpZ Z0ZpZ0Z0 0O0O0Z0A Z0MBONZ0 PZQZ0OPO ZRZ0ZRJ0 a
3513 8
b
3515
rZbZrmkZ ZpZ0lpop 0Zpa0Z0Z o0ZpZ0Z0 0O0O0Z0Z O0MBONO0 0ZQZ0OPZ ZRZ0ZRJ0 a
rZblrZkZ ZpZ0apop pZpZ0ZnZ ZPZpZ0Z0 PZ0O0Z0Z Z0MBONZP 0ZQZ0OPZ S0Z0ZRJ0 a
3512 8
Minority attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lrZkZ ZpZbZpop pZpa0mnZ Z0ZpZ0A0 PO0O0Z0M Z0MBO0Z0 0ZQZ0OPO ZRZ0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3517 8 7 6 5 4 3 2 1
3520
rZ0lrZkZ opZ0apop 0ZbZ0mnZ Z0ZpZ0A0 0Z0O0Z0Z ZQMBONZ0 PZ0Z0OPO ZRZ0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3522
rZ0Z0mkZ ZpZ0spop pZpl0Z0Z Z0MpZ0Z0 PO0O0ZbZ Z0ZBO0Z0 0ZQZ0OPO S0Z0ZRJ0 a
c
0ZrZrZkZ ZpZ0apop pZpZ0m0Z O0ZpZ0Z0 NO0O0Z0Z Z0Z0O0Z0 0Z0M0OPO SRZ0Z0J0 a
3519 8
b
3521
rZbl0skZ opZ0Zpmp 0ZpZ0apZ Z0ZpZ0Z0 0O0O0Z0Z Z0MBONZP PZQZ0OPZ S0Z0ZRJ0 a
0ZrlrmkZ opZ0Zpop 0ZpZ0a0Z Z0ZpZ0Z0 0O0O0ZbZ Z0MBO0Z0 PZQM0OPO S0Z0ZRJ0 a
3518 8
Minority attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrmkZ ZpZ0lpop 0ZpZ0Z0Z o0ZpZ0Z0 0Z0OnZ0Z O0MBONZ0 0OQZ0OPO ZRS0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3523 8 7 6 5 4 3 2 1
3526
rZ0lrZkZ ZpZnapop 0ZpZ0m0Z Z0ZpZ0A0 0O0O0Z0Z Z0MQONZ0 0Z0Z0OPO ZRZ0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3528
rZblrZkZ opZ0Zpop 0ZpZ0anZ Z0ZpZ0Z0 0O0O0Z0Z Z0MBONZP PZQZ0OPZ S0Z0ZRJ0 a
c
rZ0ZrmkZ opZ0lpop 0ZpZ0Z0Z Z0ZpZbZ0 NO0OnZ0Z Z0ZBONZP PZQZ0OPZ ZRZ0ZRJ0 a
3525 8
b
3527
rZblrmkZ opZ0Zpop 0Zpa0m0Z Z0ZpZ0A0 0Z0O0Z0Z Z0MBONZ0 POQZ0OPO ZRZ0ZRJ0 a
rZbl0skZ opZ0apop 0ZpZ0ZnZ Z0ZpZ0Z0 0Z0O0Z0Z Z0MBONO0 POQZ0OPZ ZRZ0ZRJ0 a
3524 8
Minority attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZrmkZ opZbZpo0 0ZPl0m0o Z0ZpZ0Z0 0Z0O0Z0Z Z0MBONZ0 PZQZ0OPO ZRZ0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3529 8 7 6 5 4 3 2 1
3532
rZ0l0mkZ ZpZnspop 0ZpZbZ0Z Z0ZpZ0Z0 0o0O0Z0Z O0MBONZ0 0Z0Z0OPO ZQZ0SRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3534
rZ0ZrZkZ ZpZ0lpop 0ZpZ0ZnZ ZPZpZ0Z0 0Z0OnZbZ Z0MBONZ0 0ZQZ0OPO ZRZ0ZRJ0 a
c
rZ0l0skZ opm0apZp 0ZpZ0ZpZ Z0ZpZ0Z0 0O0O0A0Z O0mQONZ0 0Z0Z0OPO S0Z0ZRJ0 a
3531 8
b
3533
rZ0ZrZkZ opZ0Zpop 0mplbZnZ Z0ZpZ0Z0 0Z0O0Z0Z Z0ZBONZP POQZNOPZ ZRS0Z0J0 a
rZ0ZrmkZ ZpZ0lpop pZpZbZ0Z Z0ZpZ0Z0 NO0OnZ0Z Z0ZBONZ0 PZQZ0OPO ZRZ0ZRJ0 a
3530 8
Minority attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Zkm0s opZ0mpop 0lpZ0ZbZ Z0MpZ0Z0 0Z0O0Z0Z L0Z0O0A0 PO0ZBOPZ S0Z0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3535 8 7 6 5 4 3 2 1
3538
rZ0lkZ0s opZ0apop 0ZpZ0m0Z Z0ZpAnZ0 0Z0O0Z0Z Z0MNO0Z0 PO0Z0OPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3540
rZ0Z0skZ opZnlpop 0ZpZ0Z0Z Z0ZpZ0Z0 0O0OnZ0Z Z0MNO0Z0 PZQZ0OPO S0Z0ZRJ0 a
c
rZbZ0skZ ZpZ0lpZp pZpZ0ZpZ Z0ZpZ0Zn QO0O0Z0Z Z0ZBO0Z0 PZ0ZNOPO S0Z0ZRJ0 a
3537 8
b
3539
rZ0ZrmkZ ZpZ0Zpo0 pZplbZ0Z Z0ZpZ0Zp NO0O0ZnZ Z0ZBO0M0 PZQZ0OPO ZRS0Z0J0 a
rZ0l0skZ ZpZ0apmp 0ZpZ0mpZ ZPZpZ0Z0 0Z0O0Z0A Z0MQONZ0 0Z0Z0OPO ZRZ0ZRJ0 a
3536 8
Minority attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrmkZ opZ0l0op 0ZpZ0Z0Z Z0Z0ZpZ0 0Z0OpZ0Z Z0M0O0ZP POQM0OPZ S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3541 8 7 6 5 4 3 2 1
3544
rZ0ZrZkZ o0Z0Zpop 0mpZ0lnZ Z0ZpZ0Z0 0Z0O0Z0Z O0MQONZP 0Z0Z0OPZ S0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3546
rZ0Z0skZ opZqZpop 0ZpZ0a0Z Z0ZpZ0Z0 0Z0O0Z0Z Z0MQO0Z0 PO0Z0OPO S0Z0J0ZR a
c
rZ0ZrZkZ ZpZnlpZp 0ZpZ0ZpZ o0ZpZ0Z0 0O0OnZ0Z O0M0ONZ0 0ZQZ0OPO ZRZ0ZRJ0 a
3543 8
b
3545
rZbl0skZ ZpZ0apmp pZpZ0mpZ Z0ZpA0Z0 0O0O0Z0Z O0MBONZ0 0ZQZ0OPO S0Z0ZRJ0 a
rZ0ZrakZ ZpZnZpop 0ZpZqm0Z o0ZpZ0Z0 0Z0O0Z0Z O0M0ONA0 0OQZ0OPO ZRZ0ZRJ0 a
3542 8
Minority attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrZkZ opZ0lpop 0ZpZ0ZnZ Z0ZpZ0Z0 0O0OnZ0Z Z0MBONZ0 PZQZ0OPO ZRZ0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3547 8 7 6 5 4 3 2 1
3550
rZ0Z0skZ opZ0Zpo0 0lpmbZ0o Z0ZpZ0Z0 0Z0O0Z0Z O0ZBO0Z0 0OQA0OPO ZRZ0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3552
rZ0Z0skZ opZ0Zpo0 0ZpZ0Z0o Z0ZpZ0Z0 0Z0O0ZqZ O0L0O0Z0 0O0Z0OPO S0Z0ZRJ0 a
c
rZbZ0skZ ZpZ0lpmp pZpZ0apZ Z0MpZ0Z0 PO0O0Z0Z Z0ZBONZ0 0ZQZ0OPO ZRZ0ZRJ0 a
3549 8
b
3551
rZ0ZrZkZ ZpZ0ZpZp pZpm0lpZ Z0MpZ0Z0 0Z0O0ZbZ ZQZBO0O0 PO0Z0OPZ Z0S0S0J0 a
rZ0lrZkZ ZpZ0ZpZp 0ZpZ0apZ ZPZpZnZ0 0Z0O0Z0Z Z0M0ONZ0 0ZQZ0OPO Z0S0ZRJ0 a
3548 8
Minority attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ ZpZnZpo0 0ZpZ0l0o Z0ZpZ0Z0 0O0O0ZbZ ZQS0ONZ0 0Z0ZBOPO Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3553 8 7 6 5 4 3 2 1
3556
rZbZrZkZ ZpZ0Zpop pZpZ0Z0Z Z0Z0Z0Z0 PO0OpZ0l Z0Z0O0MP 0ZQZ0OPZ ZRZ0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3558
rZ0Z0skZ ZbonZpo0 pZ0l0a0o ZpZpZ0Z0 0O0O0Z0Z O0M0ONZ0 0Z0ZBOPO Z0SQZRJ0 a
c
rZ0ZrmkZ opZ0Zpop 0Zpmbl0Z Z0ZpZ0Z0 NZ0O0Z0Z Z0ZBONZP POQZ0OPJ ZRZ0ZRZ0 a
3555 8
b
3557
rZbZrZkZ opZnlpop 0ZpZ0m0Z Z0ZpZ0Z0 0O0O0Z0Z Z0MBONZ0 PZ0Z0OPO SQZ0ZRJ0 a
0Z0ZrakZ ZbZnZpZ0 0opl0Zpo s0ZpZ0Z0 PZ0O0Z0Z Z0M0ONZ0 0ZQZ0OPO ZRZ0SBJ0 a
3554 8
Minority attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0lrmkZ ops0apop 0ZpZbZ0Z Z0ZpZ0Z0 NO0O0Z0Z Z0ZBONZP PZQZ0OPZ Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3559 8 7 6 5 4 3 2 1
3562
0Z0lrZ0Z ZpZ0apjp 0ZpZ0mpZ ZPZpZ0Z0 0Z0O0Z0Z s0MQONZP 0Z0Z0OPZ ZRZ0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3564
rZ0lrmkZ opZ0Z0mp 0ZpZbopZ Z0ZpZ0Z0 0O0O0Z0Z Z0MBO0ZP PZQZ0OPM ZRZ0ZRJ0 a
c
rZbZrZkZ ZpZ0lpop pZpZ0ZnZ Z0ZpZ0Z0 PO0OnZ0Z Z0MBONZ0 0ZQZ0OPO ZRZ0ZRJ0 a
3561 8
b
3563
rZbZrZkZ ZpZnlpZp 0ZpZ0ZpZ o0ZpZ0Zn NZ0O0Z0Z O0ZBONZP 0OQZ0OPZ ZRZ0ZRJ0 a
0Z0srZkZ ZpZ0lpo0 pZpZ0ZpZ Z0Z0Z0Z0 PO0OpZ0Z Z0Z0O0Z0 0ZQZ0OPO ZRS0Z0J0 a
3560 8
Minority attack
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0skZ ZpZ0Zpop pZps0Z0m Z0Z0ZbZ0 PO0OpZ0l Z0S0O0MP 0L0Z0OPZ Z0S0ZBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3565 8 7 6 5 4 3 2 1
3568
0ZrZqskZ opZ0a0Zp 0ZpmpZ0Z Z0ZpMpob 0ZPO0Z0Z ZPZ0ZPO0 PAQZPZBO Z0S0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3570
rZbZ0s0j opZnl0op 0ZpZpm0Z Z0ZpMpZ0 0ZPO0O0Z ZPZ0O0Z0 PZ0M0OBO S0ZQZRJ0 a
c
rZ0Z0skZ opZnlbop 0Zpapm0Z Z0ZpZpZ0 0ZPO0Z0Z APZNZ0O0 PZ0ZPOBO SNL0ZRJ0 a
3567 8
b
3569
rm0ZbskZ opZ0l0op 0ZpZpm0Z Z0ZpZpZ0 PZPO0Z0Z ZPZ0ZNO0 0ZNZPOBO S0ZQZRJ0 a
rmbZ0skZ o0Z0l0op 0opapm0Z Z0ZpMpZ0 0ZPO0Z0Z ZPZ0Z0O0 PZ0MPOBO S0AQZRJ0 a
3566 8
Stone wall
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ opZ0Z0op 0Zpapm0Z Z0ZpMpZ0 0ZPO0O0Z Z0Z0Z0O0 PO0M0OBO S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3571 8 7 6 5 4 3 2 1
3574
0m0ZqskZ s0a0Z0op bZpZpZ0Z opOpMpZ0 0Z0OnZ0O OPZ0ZNO0 0Z0ZPOBZ S0AQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3576
rmbZ0skZ opZ0l0op 0ZpZpm0Z Z0ZpZpZ0 PZPO0Z0Z MPZ0ZNO0 0Z0ZPOBO S0ZQZRJ0 a
c
0ZrZ0skZ obZ0l0op 0opZpZ0Z Z0ZpOpZ0 0ZPOnO0Z Z0M0O0Z0 POQZ0ZBO ZKZRZ0S0 a
3573 8
b
3575
rZ0ZbskZ opZnZ0op 0lpZpm0Z Z0ZpMpZ0 0ZPO0O0Z ZQZ0O0Z0 PO0M0OBO S0Z0J0ZR a
rm0Z0skZ obZ0l0Zp 0opa0ZpZ Z0ZpMpZ0 0Z0OnA0O ZPZ0ZNO0 PZQZPOBZ S0Z0ZRJ0 a
3572 8
Stone wall
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0l0s0j obZ0Z0op 0opZpZ0Z Z0ZpOpZ0 QOPO0Z0Z Z0M0Z0Z0 PZ0ZPOBO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3577 8 7 6 5 4 3 2 1
3580
rZbZ0Zrj opZnl0op 0ZpZpm0Z Z0ZpZpZ0 0ZPO0O0Z Z0M0ONZ0 PO0ZQOBO S0Z0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3582
0ZrZ0skZ ZbZ0l0op no0a0m0Z o0opMpZ0 0Z0O0Z0Z ZPZ0O0O0 PA0MQOBO Z0SRZ0J0 a
c
rZbl0skZ opZ0Z0op 0ZpZpm0Z Z0ZpmpZ0 0ZPO0O0Z Z0Z0O0Z0 PO0Z0OBO SNZQZRJ0 a
3579 8
b
3581
rZrZ0ZkZ o0Znl0op bopapZ0Z O0ZpZpZ0 0ZPOnZ0Z ZPZ0ZNO0 0AQMPOBO S0S0Z0J0 a
rZ0lbs0j opZ0Z0op 0ZnmpZ0Z Z0ZpMpZ0 0O0O0O0Z Z0Z0O0Z0 PL0M0OBO S0S0Z0J0 a
3578 8
Stone wall
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0l0skZ o0ZbZ0op 0ZpZpm0Z ZpZpZpZ0 0ZPO0O0Z ZQZ0ZNZ0 PO0MPOBO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3583 8 7 6 5 4 3 2 1
3586
rZ0ZbskZ opZnl0o0 0ZpZpm0o Z0ZpZpZ0 0ZPO0M0Z ZPZ0ZNO0 PZ0ZPOBO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3588
rm0Z0skZ opZ0l0o0 0Z0Zpm0o Z0ZpZpZb 0Z0O0O0Z O0M0ONZ0 0OQZ0OBO S0Z0Z0SK a
c
rZbZ0skZ opZ0l0op 0ZpZpZ0Z Z0ZpOpZ0 0ZPZ0O0Z Z0Z0Z0Z0 PO0LPOBO S0Z0ZRJ0 a
3585 8
b
3587
rmbZ0skZ opZ0Z0o0 0Zpa0l0o Z0ZpZpZ0 0Z0O0Z0Z ZQM0ZNO0 PO0ZPOBO S0Z0ZRJ0 a
rZ0Z0skZ ZbZ0l0op nopZpm0Z o0ZpMpZ0 PZPO0Z0Z MPZ0Z0O0 0ZQZPOBO S0S0Z0J0 a
3584 8
Stone wall
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrl0skZ obZ0Z0op nopapm0Z Z0ZpMpZ0 0ZPO0A0Z Z0Z0ZNO0 POQZPOBO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3589 8 7 6 5 4 3 2 1
3592
rZ0Z0skZ obZqZ0op 0opapm0Z Z0OpZpZ0 0Z0O0Z0Z ZPZNZPO0 PZ0ZPZBO S0AQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3594
0ZrZ0skZ ZbZ0l0op 0opapZ0Z o0ZpZpZ0 0mPOnZ0Z ZPZNZNO0 PA0ZPOBO ZQS0ZRJ0 a
c
rZ0ZbskZ opZnl0op 0Zpapm0Z Z0ZpMpZ0 0ZPO0Z0Z ZPZ0ZNO0 PA0ZPOBO S0ZQZRJ0 a
3591 8
b
3593
0ZrZ0skZ ZbZnl0op no0ZpZ0Z oQZpOpZ0 0Z0Z0Z0Z ZPZ0O0O0 PA0M0OBO Z0S0ZRJ0 a
rm0lbskZ opZ0Z0op 0ZpapZ0Z Z0ZpZpZ0 0OPOnZ0Z Z0M0ZNO0 PZQZPOBO ZRA0ZRJ0 a
3590 8
Stone wall
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0s0j o0Znl0op 0opZpZ0Z Z0ZpOpZ0 0ZPZ0ZnZ ZPZ0ZNO0 PAQZPOBO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3595 8 7 6 5 4 3 2 1
3598
rZ0l0skZ opZnZ0op 0Z0Zpm0Z Z0ZpMpZb 0Z0O0O0Z Z0M0O0Z0 POQZ0OBO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3600
0s0ZbskZ ZpZ0l0Z0 pZpapm0o Z0ZpMpo0 POPO0Z0Z Z0ZNZ0O0 0ZQZPOBO S0Z0ZRJ0 a
c
0sbZ0skZ opZ0l0o0 0Zpapm0o Z0ZpZpZ0 0ZPO0Z0Z Z0ZNO0O0 POQM0OBO S0Z0ZRJ0 a
3597 8
b
3599
0ZrlnskZ o0m0a0op bopZpZ0Z Z0ZpZpZ0 0ZPO0M0Z ZPM0O0O0 PZQA0OBO Z0ZRS0J0 a
rZbZqskZ ZpZna0o0 0ZpZpZ0o o0OpZpZ0 0Z0O0Z0Z Z0ZNO0O0 PO0M0OBO Z0SQZRJ0 a
3596 8
Stone wall
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Zqs0j Z0Zna0op bo0mpZ0Z o0ZpZpZ0 PZ0O0A0Z ZPZ0ZNO0 0ZQZPOBO Z0MRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3601 8 7 6 5 4 3 2 1
3604
rZbZ0skZ opZnZ0op 0ZpapZ0Z Z0ZpZpZq 0ZPOnZ0Z ZPZNZNO0 PZQZPOBO S0A0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3606
rZ0Z0skZ ZbZ0l0op nopapZ0Z o0ZpZpZ0 PZPOnZ0Z ZPZNZNO0 0AQZPOBO Z0ZRZRJ0 a
c
rm0ZbskZ opZ0l0op 0ZpZpm0Z Z0ZpMpZ0 0ZPO0Z0Z ZPM0ZPO0 PZ0ZPZBO S0ZQZRJ0 a
3603 8
b
3605
rmbZ0skZ o0Z0l0op 0o0apm0Z Z0ZpMpZ0 0Z0O0Z0Z ZPZ0Z0O0 PZQZPOBO SNA0ZRJ0 a
rZ0Z0skZ ZpZ0l0Zp 0mpZpm0Z o0ZpZpo0 0ZPO0Z0Z OPL0Z0O0 0Z0MPOBO S0Z0ZRJ0 a
3602 8
Stone wall
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZqZkZ opZ0Z0op 0ZpZpZ0Z Z0ZpMpmr 0ZPO0Z0Z ZPZ0O0O0 PZ0Z0OBO Z0SQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3607 8 7 6 5 4 3 2 1
3610
rZ0Z0skZ obZnl0op 0opZpm0Z Z0ZpZpZ0 0ZPO0Z0Z MPZ0ZNO0 PL0ZPOBO Z0S0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3612
rZ0Z0skZ o0ZnZ0op blpZpm0Z Z0ZpZpZ0 0O0O0Z0Z Z0L0Z0O0 PZ0ZPOBO SNA0ZRJ0 a
c
rZbZqskZ o0ZnZ0Zp 0ZpZpa0Z ZpZpZpo0 0OPOnZ0Z Z0ZNZNO0 PZQZPOBO ZRA0ZRJ0 a
3609 8
b
3611
0ZrZ0skZ obZnl0op 0opZpm0Z Z0ZpZpZ0 0ZPO0Z0Z ZPZNZNO0 PZ0ZPOBO Z0SQZRJ0 a
0ZbZ0s0j ZpZnl0op 0ZpapZ0Z ZPZpZpZ0 0ZPOnA0Z s0M0ZNO0 0ZQZPOBO ZRZ0ZRJ0 a
3608 8
Stone wall
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ ZbZnl0op nopZpZ0Z Z0ZpOpZ0 PZPZ0Z0Z Z0Z0O0O0 PA0MQOBO Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3613 8 7 6 5 4 3 2 1
3616
0Z0ZbZrj Zpa0l0Zp 0ZpZpm0Z Z0OpZpo0 0O0O0Z0Z Z0ZNZPO0 0A0LPZBO S0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3618
0Z0s0skZ obZ0Z0op no0apZ0Z Z0opZpZq 0ZPOnZ0Z ZPZNONO0 PA0ZQOBO Z0S0ZRJ0 a
c
rZ0Z0s0j ZpZba0Z0 0ZpmpmqZ o0ZpZpop PZPO0Z0Z ZPZ0OPO0 RZ0ZNZBO Z0SQANJ0 a
3615 8
b
3617
rmbl0s0j opZ0a0op 0ZpZpm0Z Z0ZPZpZ0 0Z0O0Z0Z Z0M0ZNO0 PO0ZPOBO ZRAQZRJ0 a
rZbZqskZ Z0Z0a0op 0opZpZ0Z Z0ZpOpZ0 pOPZ0Z0Z O0A0O0ZP 0ZQZBOPZ S0Z0ZRJ0 a
3614 8
Stone wall
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ opZna0op 0ZpZpZ0Z Z0ZpZpZ0 0ZPOnA0Z Z0Z0ZNO0 POQMPOBO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3619 8 7 6 5 4 3 2 1
3622
rZ0lnakZ ZpZbZrZp pZ0o0ZnZ Z0ZPo0o0 0Z0ZPo0Z ZQS0ZPZ0 PONABMPO Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3624
rZbZ0skZ ZpM0l0a0 0A0o0mnZ O0ZPo0Z0 0Z0ZPo0o Z0Z0ZPZ0 0O0ZBZPo S0ZQMRZK a
c
rZblnakZ ZpZ0ZrZp 0O0o0ZnZ Z0oPo0o0 0ZNZPoPZ A0M0ZPZ0 PZ0ZBZ0O S0ZQZRJ0 a
3621 8
b
3623
rZblnZkZ ZpZ0a0sn pZ0o0Z0Z Z0ZPo0Zp PO0ZPo0Z M0ZNZPo0 0Z0ZBZPO Z0SQZRAK a
0ZrZ0Z0Z Z0ZQm0sk 0o0o0m0a oNZPo0Zp 0ZPZPopZ ZPZNZPZ0 0Z0AQZPO S0Z0ZRZK a
3620 8
King's Indian attack against the white king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zbl0Zrj ZpZ0Z0ap rZ0o0ZnZ ZNoPopZn PZPZ0O0Z ZNZ0Z0O0 RZQABZ0O Z0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3625 8 7 6 5 4 3 2 1
3628
rZ0l0s0j Z0obZ0ap 0o0o0m0Z Z0ZPopZ0 pOPZ0ZPO OnM0APZ0 0Z0ZBZNZ ZRZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3630
NZ0l0ZkZ opZ0Zrap 0Z0o0mnZ Z0ZPo0Z0 0Z0ZPo0Z Z0ZNZPZb POQABZ0O Z0S0ZRJ0 a
c
rZbl0akZ opM0Z0s0 0Z0o0m0m O0ZPo0Zp 0O0ZPopZ Z0Z0ZPZP 0ZQZBMPZ Z0S0ARJ0 a
3627 8
b
3629
0Zrl0skZ opZbm0ap 0Z0o0mpZ Z0ZPo0Z0 PZ0ZPoPO ZPMNZPZ0 0Z0ABZ0Z S0ZQZRJ0 a
rZbl0skZ opZ0Z0a0 0Z0o0mnZ O0ZPo0op 0Z0ZPo0Z Z0MNZPZ0 0O0ZBAPO S0ZQZRJ0 a
3626 8
King's Indian attack against the white king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0skZ Zpo0Z0ap pZ0o0mnZ Z0OPo0o0 0Z0ZPo0Z M0ZNZPZ0 PO0ABZPO Z0SQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3631 8 7 6 5 4 3 2 1
3634
rZbl0skZ ZpZ0Z0a0 pZ0o0m0Z Z0ZPo0op 0Z0ZPo0m ZQM0ZPZP PORABMPZ Z0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3636
rZ0lnakZ ZpZbZ0s0 0Z0o0Z0Z ZNZPo0op PZ0ZPo0m ZQZ0ZPZP 0O0ABMPZ Z0S0ZRJ0 a
c
rZ0lnakZ ZpZbZ0s0 0Z0o0Z0Z ZNZPo0op PZ0ZPo0m ZQZ0ZPZP 0O0ABMPZ Z0S0ZRJ0 a
3633 8
b
3635
rZbl0akZ ZpZ0Z0s0 pZ0o0m0Z Z0ZPo0Z0 PZ0ZPoPm M0Z0Z0Z0 0O0ABMPZ S0SQZ0J0 a
rZ0lna0j ZpZbZ0s0 0Z0o0Z0Z ONZPo0op 0Z0ZPo0m ZQZ0ZPZP 0O0ABMPZ Z0S0ZRJ0 a
3632 8
King's Indian attack against the white king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0ZkZ opZ0Zrap 0Z0o0mnZ ZNZPo0o0 0Z0ZPo0Z Z0Z0ZPZ0 PO0ABMPO Z0SQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3637 8 7 6 5 4 3 2 1
3640
rZbl0ZkZ ZpZnZ0ap pZ0o0Zns Z0ZPo0o0 0O0ZPZ0Z Z0M0ZPO0 PZ0ZBANZ Z0SQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3642
rZ0l0ZkZ opZ0Zra0 0Z0o0mnZ OBZPo0Zp 0O0ZPopZ Z0Z0ZPZ0 0Z0Z0APO Z0SQMRZK a
c
rZ0l0skZ opobZ0ap nZ0o0ZnZ ZNZPo0o0 QO0ZPo0Z Z0Z0ZPZ0 PZ0ZBAPO Z0S0MRJ0 a
3639 8
b
3641
rZbl0akZ ZpZ0Z0s0 pZ0o0m0Z Z0ZPo0Z0 PZ0ZPoNm MQZ0ZPZ0 0ORZBZPZ Z0Z0ARJ0 a
rZ0l0akZ opMbZrZp 0Z0o0mnZ O0ZPo0Z0 0O0ZPopZ Z0Z0ZPZ0 0Z0ZBAPO Z0SQMRJ0 a
3638 8
King's Indian attack against the white king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0ZkZ opo0Zra0 0ZPo0mnZ Z0ZPo0op PZ0ZPo0Z Z0MNZPZP 0O0ZBAPZ S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3643 8 7 6 5 4 3 2 1
3646
rZbl0Z0s opo0Zka0 0Z0o0mnZ Z0OPo0o0 0O0ZPoPZ Z0MNZPZ0 PZ0ZBZKZ S0ZQARZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3648
rZbl0akZ opo0Z0Zr 0ZPo0mnZ OPZPo0op 0Z0ZPo0Z Z0M0ZPZP 0Z0ZBAPZ S0ZQMRJ0 a
c
0l0Z0ZkZ ZpZ0Zra0 0Z0o0ZnZ ONZPo0mp QO0ZPo0Z Z0Z0ZPoP 0Z0ZBZPZ Z0Z0MRZK a
3645 8
b
3647
rZbl0s0j Z0o0Z0a0 0ZPo0mnZ ZNZ0o0Zp 0ZBZPo0Z Z0ZNZPo0 0OQZ0ZPO S0Z0ARJ0 a
rZbl0ZkZ o0o0ZrZp Po0a0ZnZ Z0oPo0o0 0ZBZPoPZ Z0M0ZPZ0 0O0ZQZ0O S0Z0MRJ0 a
3644 8
King's Indian attack against the white king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0s0Z MpZqZ0Zk 0Z0o0Zna OPZPo0Z0 0Z0ZPo0Z Z0Z0Z0Z0 0Z0Z0LPO S0Z0MRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3649 8 7 6 5 4 3 2 1
3652
rZbl0skZ opZ0Z0a0 0Z0o0mnZ ONZPo0Zp 0O0ZPopZ Z0Z0ZPZ0 0Z0ZBAPO S0ZQMRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3654
rZbl0a0j o0Z0ZrZ0 0Z0o0mnZ Z0oPo0o0 QZPZPoPZ Z0M0ZPZ0 PS0ABM0Z Z0Z0ZRJ0 a
c
rZbl0akZ opZ0ZrZp 0Z0o0mnZ MNZPo0o0 PO0ZPo0Z A0Z0ZPZ0 0Z0ZBZPO S0ZQZRJ0 a
3651 8
b
3653
rZblnskZ opZ0m0a0 0Z0o0ZpZ Z0oPo0Zp 0ZPZPoPZ Z0MNZPZP PO0ABZ0Z S0ZQZRJ0 a
rZbl0ZkZ opo0ZrZ0 0Z0o0m0Z Z0OPo0o0 PO0ZPoPm ZNMQZPZ0 0Z0ZBJ0Z Z0S0ZRZ0 a
3650 8
King's Indian attack against the white king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0a0Z0j ZpZ0l0sn 0M0o0Z0Z O0ZPo0Zp BZ0ZPo0m Z0Z0ZPZ0 0Z0ZQZPJ Z0Z0A0S0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3655 8 7 6 5 4 3 2 1
3658
0ZbZ0skZ Z0l0m0Zp pS0o0s0Z O0oPopZ0 0ZPZ0Z0Z L0Z0Z0Z0 0ZBZNOPO Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3660
0Zbl0s0Z Zpo0Znj0 0Z0o0apZ Z0ZPo0mp 0OPZPoPZ ZNM0ZPZP 0Z0ZBZKZ Z0L0A0ZR a
c
0Zbl0s0j Lpo0Z0ap 0Z0o0mnZ Z0ZPo0o0 0OPZPo0Z ZNM0ZPZ0 0Z0ABZPO Z0Z0ZRJ0 a
3657 8
b
3659
rZ0l0Zrj Zpo0m0Zp 0Z0o0m0Z ZNOPo0Z0 0O0ZPo0Z Z0Z0ZPZ0 0Z0M0Z0O Z0SQZRZK a
0Zbl0snj Z0onZ0ap 0Z0o0Z0Z ONoPo0o0 pZ0ZPo0Z O0ZBZPZ0 0ZQZ0ZPO ZRA0ZRJ0 a
3656 8
King's Indian attack against the white king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZbZrskZ Zno0Zqa0 0o0o0m0o oNZPo0Z0 0OPZPZPZ O0Z0Z0O0 0Z0MBZKZ S0ZQS0A0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3661 8 7 6 5 4 3 2 1
3664
rZ0ZqZkZ opobZ0a0 0Z0o0Z0o Z0ZPo0o0 0OPZPs0m Z0M0MpO0 PZ0A0Z0O Z0SQZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3666
rZ0ZqskZ Z0obZ0an no0o0Z0Z ZNZPo0op 0OPZPo0Z Z0Z0ZPZ0 0Z0MBAPO ZRZQZRJ0 a
c
rZbl0Z0j opo0m0ap 0Z0o0mrZ Z0OPo0o0 0O0ZPo0Z ZQMNZPZ0 PZ0ZBAPO S0S0Z0J0 a
3663 8
b
3665
rZ0l0skZ ZpobZ0a0 0Z0o0m0o Z0ZPo0o0 0OPZPo0Z Z0L0ZPZ0 0Z0MBAPO S0Z0ZRJ0 a
rZbl0akZ opZ0ZrZp 0Z0o0mnZ Z0ZPo0Z0 0Z0ZPopZ Z0MNZPZ0 PORLBAPO Z0S0Z0J0 a
3662 8
King's Indian attack against the white king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0mkZ Z0o0m0ap pZPo0Z0s ZPZ0o0o0 PZ0ZPo0Z Z0M0ZPZ0 0Z0ZBAPO S0ZQMRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3667 8 7 6 5 4 3 2 1
3670
rZbZ0akZ ZpZ0Z0s0 pl0o0m0Z Z0ZPo0Z0 PZ0ZPoPm Z0M0Z0Z0 0ORZBMPZ S0ZQAKZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3672
rZ0Z0s0j Z0o0l0Z0 PZPo0a0Z Z0Z0o0Zn 0ZBZPmQZ Z0Z0ZNZ0 0O0Z0APZ S0Z0ZRJ0 a
c
rZbl0skZ opo0m0ap 0Z0o0ZpZ ZPZPo0Mn 0ZPZPZ0Z Z0M0ZPO0 PZ0ZBZKZ S0AQZRZ0 a
3669 8
b
3671
rZbl0skZ Z0Z0Z0a0 po0o0mnZ ZPZPo0op 0Z0ZPo0Z Z0MNZPZ0 PZ0ZBAPO S0ZQZRJ0 a
rZ0l0skZ ZpobZ0a0 0Z0o0mnZ ONOPo0Zp 0Z0ZPopZ Z0Z0ZPZ0 0O0ZBAPO S0ZQMRJ0 a
3668 8
King's Indian attack against the white king
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZqZ0skZ o0ZbZ0a0 0o0o0mnZ ONZPo0o0 0MPZPoPZ S0Z0ZPZ0 0Z0ZBAKZ Z0ZQZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3673 8 7 6 5 4 3 2 1
3676
rZ0lka0s ZnZ0Zpop pZ0opm0Z Z0Z0Z0A0 0o0MPZ0Z Z0M0Z0Z0 POPZ0OPO S0ZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3678
rlbZ0skZ Z0Znapop pZ0opZ0Z Z0Z0Z0O0 0o0APO0Z Z0MBZQZ0 POPZ0Z0O Z0JRZ0ZR a
c
rm0Zka0s Zbl0Zpop pZ0opm0Z Z0Z0Z0Z0 Po0MPZ0Z Z0M0Z0O0 0OPZ0OBO S0AQS0J0 a
3675 8
b
3677
rZ0lka0s ZbZ0Zpo0 pZ0opm0o Zpm0Z0Z0 0Z0MPZ0A ZBM0Z0Z0 POPZ0OPO S0ZQS0J0 a
0Z0s0Z0s ZkZ0apZp pZ0opo0Z l0m0Z0Z0 0o0MPZQZ Z0M0Z0Z0 POPZ0OPO Z0JRS0Z0 a
3674 8
Sicilian piece sacrifice on d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Zka0s ZbZnZpop pl0opm0Z ZpZ0Z0A0 0Z0MPO0Z Z0MBZQZ0 POPZ0ZPO Z0JRS0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3679 8 7 6 5 4 3 2 1
3682
rm0Zka0s Zbl0Zpop pZ0opm0Z Z0Z0Z0Z0 Po0MPZ0Z Z0M0Z0O0 0OPZ0OBO S0AQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3684
0l0s0skZ ZbZ0apZp ponopmpZ Z0Z0Z0Z0 0ZPMPO0Z ZPM0ZRZ0 PABZ0ZPO Z0SQZ0ZK a
c
rZ0Zkans Zbl0Zpop pZnopZ0Z Z0Z0Z0Z0 Po0MPZ0Z Z0M0Z0O0 0OPZ0OBO S0AQS0J0 a
3681 8
b
3683
rZbZka0s ZplnZpZp pZ0ZpZpA Z0m0O0Z0 0Z0M0Z0Z ZBM0Z0Z0 POPZQZPO S0Z0ZRJ0 a
rZ0Zkans Zbl0Zpop pZnopZ0Z Z0Z0Z0Z0 Po0MPZ0Z Z0M0Z0O0 0OPZ0OBO S0AQS0J0 a
3680 8
Sicilian piece sacrifice on d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0lka0s ZbZ0Zpop pm0opm0Z Z0Z0Z0Z0 Po0MPO0Z Z0M0ZBZ0 0OPZ0ZPO S0AQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3685 8 7 6 5 4 3 2 1
3688
rZ0Z0skZ ZplbaNZp pZ0opZpZ Z0Z0Z0On PZ0ZPZ0Z Z0M0A0Z0 0OPZ0L0O S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3690
rZ0Zka0s ZblnZpop pZ0opm0Z Z0Z0Z0Z0 RZ0MPZ0Z Z0M0Z0O0 0OPZ0OBO Z0AQS0J0 a
c
rZ0Z0skZ Z0Zqapop 0Zbopm0Z o0Z0Z0Z0 0o0APO0Z O0MBZRL0 0OPZ0ZPO Z0Z0S0J0 a
3687 8
b
3689
rZbZnskZ Z0l0apop ponopZ0Z Z0Z0Z0O0 0ZPMPO0Z O0M0A0Z0 0O0ZBZ0O Z0SQJ0ZR a
0Zks0a0s Z0lbZpZ0 pZnopZpZ ZpZ0Z0On 0Z0ZPO0Z ZNM0ZBZ0 POPA0L0Z Z0JRS0Z0 a
3686 8
Sicilian piece sacrifice on d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rl0Z0skZ Z0Znapop pobopZ0Z Z0Z0Z0Z0 PZPZPO0Z ZPMBZ0Z0 0A0ZQZPO S0Z0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3691 8 7 6 5 4 3 2 1
3694
rl0s0ZkZ ZbZnapop pZ0o0Z0Z ZpZ0o0O0 0Z0APO0Z Z0MBZ0ZQ POPZ0Z0O Z0JRZ0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3696
rZbZka0s Z0Z0ZpZ0 pZ0opZpO ZpZ0Z0An 0ZqMPZ0O Z0M0ZPZ0 POPL0Z0Z ZKZ0S0S0 a
c
0Z0Z0skZ Zblrapop pZnopm0Z ZpZ0Z0Z0 0Z0ZPO0Z ONMBZ0ZQ 0OPA0ZPO Z0Z0SRZK a
3693 8
b
3695
rZ0ZkZ0s Zblnapop po0opm0Z Z0Z0Z0A0 0ZPMPZ0Z Z0M0Z0O0 PO0Z0OBO S0ZQS0J0 a
0s0snZkZ Zblnapop po0opZ0Z Z0Z0Z0O0 0ZPZPO0Z M0M0ABZ0 PO0ZQZ0O Z0SRZ0J0 a
3692 8
Sicilian piece sacrifice on d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrakZ Z0l0Z0o0 pZbZpZ0Z Z0Z0o0o0 0o0ZPZ0Z O0M0Z0ZR 0OPZ0LBO Z0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3697 8 7 6 5 4 3 2 1
3700
0sbZka0s Z0lnZpop pZ0ZpZ0Z Z0Z0O0Z0 0o0M0Z0Z Z0M0LBZ0 POPZ0ZPO Z0JRS0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3702
0ZrZka0s Z0l0Z0op pZbopm0Z ZpZ0Z0A0 0Z0ZPZ0Z Z0M0Z0Z0 POPZ0ZPO ZKZRLBZR a
c
rZ0Zka0s ZbZnZpo0 pl0opm0o ZpZ0Z0Z0 0Z0MPZ0A ZBM0Z0Z0 POPZ0OPO S0ZQS0J0 a
3699 8
b
3701
rZ0lkZ0s ZbZnapop pZ0opm0Z Z0Z0Z0A0 0o0MPO0Z Z0MBZ0Z0 POPL0ZPO Z0JRS0Z0 a
0Zrs0ZkZ ZbZ0apop pl0opm0Z mpZ0Z0Z0 0Z0MPO0Z OPM0ZBL0 0APZ0ZPO S0ZRZ0ZK a
3698 8
Sicilian piece sacrifice on d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZnskZ ZqZbapop pZnopZ0A ZpZ0Z0Z0 0Z0MPZ0Z ZBM0Z0L0 POPZ0OPO Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3703 8 7 6 5 4 3 2 1
3706
0ZrZ0s0j ZqZ0apop 0Zbo0Z0Z ZpZ0o0Z0 0O0APS0Z Z0MBZ0ZQ 0ZPZ0ZPO Z0ZRZ0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3708
rm0Zka0s Zbl0ZpZp pZ0opo0Z ZpZ0Z0Z0 0Z0MPZ0Z Z0MBZ0Z0 POPZ0OPO S0ZQS0J0 a
c
0Zrs0ZkZ Z0l0apop pobopm0Z Z0Z0Z0Z0 0ZPZPA0Z ZPM0ZPZ0 PZ0LBZPO Z0SRZ0J0 a
3705 8
b
3707
rZbZka0s Z0l0ZpZp pZ0opO0Z Z0m0Z0ZQ 0o0MPZ0Z Z0M0Z0Z0 POPZ0Z0O Z0JRZBZR a
0Z0s0Z0j ZqZrapop pZbopm0Z ZpZ0Z0Z0 0Z0APO0Z O0MRZBL0 0OPZ0ZPO Z0ZRZ0ZK a
3704 8
Sicilian piece sacrifice on d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0Z0Z ZpZkaRZ0 0ZnopZQZ ZpZ0Z0Z0 0Z0ZPZ0Z Z0M0Z0A0 POPZ0ZPO Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3709 8 7 6 5 4 3 2 1
3712
rZ0ZkZ0s ZbZnapop pZ0opm0Z l0Z0Z0A0 0o0MPZ0Z ZBM0ZPZ0 POPL0ZPO ZKZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3714
rZ0ZkZ0s ZbZnapop pZ0opZ0Z Z0Z0Z0O0 0l0MPO0Z Z0M0ZQZB 0OPZ0Z0O Z0JRS0Z0 a
c
rZ0ZkZ0s ZbZ0apZp pZ0opo0Z l0m0Z0Z0 0o0MPO0Z ZBM0Z0Z0 POPL0ZPO ZKZRS0Z0 a
3711 8
b
3713
0jbZ0Z0s ZpZ0apZ0 plnopo0Z Z0Z0Z0Z0 0Z0ZPOro ONMRZ0Z0 0OPZ0ZPO ZKZRLBZ0 a
rZ0Zka0s ZblnZpop pZ0opm0Z Z0Z0Z0A0 0o0MPZ0Z Z0M0Z0OB POPZ0O0O S0ZQS0J0 a
3710 8
Sicilian piece sacrifice on d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Zka0s ZqZ0Zpop pZbopm0Z ZpZ0Z0Z0 0Z0ZPA0Z O0M0Z0O0 0OPZ0OBO S0ZQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3715 8 7 6 5 4 3 2 1
3718
rm0Zka0s Zbl0Zpop pZ0opm0Z Z0Z0Z0Z0 pZ0MPZ0Z Z0M0Z0O0 0OPZ0OBO S0AQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3720
0Z0s0skZ oqZnapop 0obopZ0Z Z0Z0Z0Z0 0Z0APO0Z Z0MBZ0ZQ POPZ0ZPO Z0Z0SRZK a
c
rZ0Zka0s ZplbZpop pZnopm0Z Z0Z0Z0Z0 0Z0MPZ0Z Z0M0Z0O0 POPZ0OBO S0AQS0J0 a
3717 8
b
3719
rZbZ0Z0s Z0lnjpop pZ0opm0Z ZpZ0Z0A0 0Z0ZPZ0Z ZBM0Z0Z0 POPL0OPO S0Z0ZRJ0 a
rZ0Zka0s ZbZnZpop pl0opm0Z Z0Z0Z0A0 Po0MPZ0Z ZBM0Z0Z0 0OPZ0OPO S0ZQS0J0 a
3716 8
Sicilian piece sacrifice on d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0Zka0s Zbl0Zpop pZ0opm0Z Z0Z0Z0Z0 Po0MPZ0Z Z0M0Z0O0 0OPZ0OBO S0AQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3721 8 7 6 5 4 3 2 1
3724
0ZbZka0s ZqZ0ZpZp 0Z0opO0Z o0m0Z0Z0 0s0MPZ0Z ZPM0ZQZB 0ZPZ0Z0O Z0JRZ0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3726
0ZrZkZ0s Z0l0apo0 0Zbopm0Z opZ0Z0Z0 0Z0ZPA0o O0MRZ0O0 0OPZQOBO Z0Z0S0J0 a
c
0Z0s0s0j ZblnZpZp po0opapZ Z0Z0Z0Z0 0ZPZPOQZ ZPM0Z0ZR PA0Z0ZPO ZBZ0ZRZK a
3723 8
b
3725
rZ0ZrZkZ Z0lba0op pZnopZpZ Z0m0ZPZ0 0o0MPZ0Z ZBM0A0Z0 POPZQZ0O ZKZRZ0S0 a
rZ0Zks0Z ZblnapL0 pZ0opo0o ZpZ0Z0Z0 0Z0MPO0Z Z0MBZ0Z0 POPZ0ZPO Z0JRS0Z0 a
3722 8
Sicilian piece sacrifice on d5
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrakZ Z0l0ZpZ0 pZnopZpZ ZpZ0mPO0 0Z0ZPM0Z Z0M0Z0Z0 POPZ0ZBZ S0AQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3727 8 7 6 5 4 3 2 1
3730
0Zrl0skZ ZpZnapop pZ0o0m0Z O0Z0oPZ0 0Z0ZPZ0Z ZNM0A0Z0 0OPZQZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3732
0ZrZ0Z0Z Z0l0opj0 0o0obZpZ Z0Z0Z0Zn pZrZPO0O Z0M0L0Z0 POPM0Z0Z ZKZRZ0S0 a
c
0Zrlka0s ZbZnZpZ0 pZ0opm0o ZpZ0Z0o0 0Z0MPZ0Z ZBM0Z0A0 POPZQOPO Z0JRS0Z0 a
3729 8
b
3731
0Zrl0skZ opZbopap 0Z0o0mpZ Z0Z0m0Z0 0Z0MPZ0Z ZBM0A0ZP POPZQOPZ S0Z0ZRJ0 a
0Zrl0skZ o0Zbapop 0Z0o0m0Z mBZ0oPZ0 0Z0ZPZ0Z ZNM0A0Z0 POPZQZPO Z0JRZ0ZR a
3728 8
Sicilian exchange sacrifice on c3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZnZkZ o0Z0Zpa0 qZ0obZpZ ZpZ0o0O0 0ZrZPZ0Z ZNM0APZ0 POPL0Z0S ZKZRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3733 8 7 6 5 4 3 2 1
3736
rZrZ0ZkZ o0ZbopZp 0Z0o0mpL lpZ0m0Z0 0Z0MPZ0O ZBM0ZPZ0 POPZ0ZPZ ZKZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3738
0Zrl0skZ Z0Zbopap pZ0o0mpZ ZpZ0Z0Z0 0Z0ZPO0Z ONM0AQZP 0OPZ0ZPZ Z0ZRZRJ0 a
c
0ZrZ0akZ Z0Z0Zpo0 QZ0o0m0o Z0Z0oPZ0 0l0ZPZ0Z ZNM0Z0Z0 0OPZ0ZPO S0Z0Z0ZK a
3735 8
b
3737
rl0Z0ZkZ Z0Zbo0ap 0Z0o0mpZ ZpZ0Z0Z0 pZrMPZPZ O0M0APZ0 0OPZ0Z0L Z0JRZ0ZR a
0ZrZ0ZkZ Z0Z0apo0 0Z0o0m0o lpsBoPZ0 pZ0ZPZPZ Z0MQZ0ZP POPZ0ZRZ ZKZ0Z0S0 a
3734 8
Sicilian exchange sacrifice on c3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZqZ0Z ZbskaRZQ pA0opZ0Z ZpZ0Z0s0 0Z0ZPZ0Z O0M0Z0Z0 0OPZ0Z0J S0Z0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3739 8 7 6 5 4 3 2 1
3742
0ZrZkZ0s ZpZ0apo0 pZ0obm0o Z0Z0o0Z0 0Z0ZPZPO O0M0APZ0 0OPZBZ0Z Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3744
0Zrlka0s ZbZnZpop po0opm0Z Z0Z0Z0Z0 PZ0MPO0Z Z0M0ABZ0 0OPZ0ZPO S0ZQZRJ0 a
c
0Zrl0skZ ZbZ0apZp pZ0o0mpZ ZpZ0oPZ0 0Z0ZPZ0Z O0MBA0L0 0OPZ0ZPO S0Z0ZRJ0 a
3741 8
b
3743
0ZrZkZbZ opZ0oqZ0 0Z0o0ZpL Z0s0Z0Z0 0Z0ZPZPZ Z0MNZPZ0 POPZ0Z0Z Z0J0Z0ZR a
rZrl0ZkZ ZbZnapop po0o0m0Z Z0Z0o0A0 PZ0ZPZ0Z ZBM0Z0Z0 0OPMQOPO S0ZRZ0J0 a
3740 8
Sicilian exchange sacrifice on c3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZkZ0a ZbZnlpZ0 pm0opZpZ ZpZ0Z0O0 0Z0MPOQZ O0M0A0Z0 0OPZ0Z0Z Z0JRZBZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3745 8 7 6 5 4 3 2 1
3748
rZrZ0Z0Z ZpZ0jpop pZ0abm0Z l0Z0o0Z0 0Z0ZPZPZ ZBM0A0L0 POPZ0Z0O ZKZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3750
0ZrlrZkZ ZbZnapop pZ0o0m0Z ZpZ0o0Z0 0Z0ZPO0Z ONM0ZBL0 0OPZ0ZPO S0A0ZRZK a
c
0Zrl0skZ ZpZbapop pZ0opm0Z Z0Z0Z0Z0 Pm0MPO0Z Z0M0A0L0 0OPZBZPO S0Z0ZRZK a
3747 8
b
3749
0ZrZ0ZkZ opZbopa0 qZ0o0mpZ Z0Z0Z0Z0 0ZrZPZPZ ZNM0APZ0 POPZ0Z0L Z0JRZ0ZR a
0Z0s0ZkZ Zbl0Zpop poro0a0Z Z0Z0o0Z0 Pm0ZPZBZ Z0MNZ0Z0 0OPZQOPO Z0ZRZRZK a
3746 8
Sicilian exchange sacrifice on c3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrl0skZ ZbZnapop pZ0o0m0Z ZpZ0oPA0 0Z0ZPZ0Z O0M0Z0M0 BOPZ0ZPO S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3751 8 7 6 5 4 3 2 1
3754
0Zra0Z0Z ZqZ0Zpj0 0Zro0mpZ o0Z0o0Z0 RZ0ZPZ0Z ZNM0Z0Z0 ROPZ0ZPO Z0Z0ZQZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3756
qZ0ZkZ0s ZbZnapop po0opm0Z Z0Z0Z0Z0 PZrZPO0Z Z0M0ABZ0 0OPM0ZPO S0Z0LRJ0 a
c
0ZrZ0skZ ZqZ0apop po0obm0Z Z0Z0o0Z0 Pm0ZPZ0Z Z0M0A0OP 0OPZQOBZ M0SRZ0J0 a
3753 8
b
3755
0ZrZ0akZ opZnZpop 0l0o0m0Z Z0Z0sPZ0 0Z0ZPZ0Z Z0M0AQZ0 POPZBZ0O Z0JRZ0S0 a
0ZrZ0ZkZ ZpZ0apop plrobZPZ Z0Z0o0ZP 0Z0ZPZ0Z ZNM0ZPZ0 POPL0Z0S ZKZRZ0Z0 a
3752 8
Sicilian exchange sacrifice on c3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrlka0s ZpZbZpop pZ0opm0Z m0Z0Z0Z0 0Z0MPZ0Z Z0MBA0Z0 POPZQOPO Z0JRZ0S0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3757 8 7 6 5 4 3 2 1
3760
0Zrl0skZ ZbZnapop pZ0opm0Z ZpZ0Z0Z0 0Z0MPOPZ O0MBAQZ0 0OPZ0Z0O Z0Z0SRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3762
0Zrlka0s ZbZnZpop pZ0opm0Z ZpZ0Z0Z0 0Z0MPO0Z O0M0ABZ0 0OPZ0ZPO S0ZQZRJ0 a
c
0Z0l0skZ Z0ZbZpZ0 0Z0o0ZPZ Zpspm0aP pZ0MPZ0Z Z0M0ZPZ0 POPZ0ZQZ ZKZRZ0ZR a
3759 8
b
3761
0Z0Z0skZ Z0l0opap 0Z0obmpZ ZRs0Z0Z0 0Z0ZPZPZ Z0MQZ0ZP 0OPZ0OBJ Z0A0Z0ZR a
0ZrZ0skZ opZbopa0 0Z0o0mpZ l0Z0m0ZP 0Z0MPZpZ ZBM0APZ0 POPL0Z0Z Z0J0Z0SR a
3758 8
Sicilian exchange sacrifice on c3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrs0Z0Z ZpZ0apjp pZ0onmpZ Z0Z0Z0Z0 Pl0ZPZ0Z Z0M0APZ0 0OPS0Z0O Z0LBZ0SK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3763 8 7 6 5 4 3 2 1
3766
0Z0l0skZ Z0Z0opap pZro0mpZ ZpZ0mPZ0 0Z0SPZPZ ZPM0A0Z0 0OPZBZ0O Z0ZQZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3768
0Zrl0skZ opZbopa0 0Z0o0mpZ Z0Z0Z0ZP 0Z0ZPZ0Z ZPM0ANZ0 0OPZQZ0Z Z0JRZ0ZR a
c
0Zrl0skZ opZbopap 0Z0o0mpZ Z0Z0m0Z0 0Z0MPZ0Z ZBM0A0ZP POPZQOPZ S0Z0S0J0 a
3765 8
b
3767
0Zrlka0s ZbZnZpop pm0opZ0Z ZpZ0Z0Z0 0Z0MPZPO Z0MBAPZ0 POPZ0L0Z Z0JRZ0ZR a
0ZqZrZka opZbopZp 0Z0o0mpZ Z0Z0Z0A0 0ZrZPZPS ZNM0ZPZ0 POPL0Z0Z Z0JRZ0Z0 a
3764 8
Sicilian exchange sacrifice on c3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zrl0skZ opZnapo0 PZ0obm0o Z0Z0o0Z0 0Z0ZPZ0Z Z0M0ZNZP 0OPZ0OPZ S0AQSBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3769 8 7 6 5 4 3 2 1
3772
0jrZrZ0Z ZbZnZpZp pl0o0ZpZ ZpZ0oPL0 0Z0ZPZ0O Z0MBZ0O0 POPZ0Z0Z ZKZRZRZ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3774
0ZrZqskZ ZbZ0a0Zp pZ0o0o0Z Z0Z0oPo0 0Z0ZPZQZ ZPM0A0ZR 0OPS0Z0O Z0Z0Z0J0 a
c
0Z0Z0skZ opZ0Zpap 0Z0MpZpZ l0Z0Z0Z0 0ZrZPZ0Z Z0M0L0Z0 POPZ0Z0Z ZKZRZ0ZR a
3771 8
b
3773
0ZrZrZkZ ZpZ0Zpa0 pZ0obZpZ l0Z0m0O0 0Z0ZPA0S Z0M0Z0L0 POPZBZ0Z Z0J0Z0ZR a
0ZqZkZ0s ZbZ0a0Z0 pZ0o0o0Z ZpZ0oRo0 0ZrZPZ0Z O0MQZ0AP 0OPZRZPZ ZKZ0Z0Z0 a
3770 8
Sicilian exchange sacrifice on c3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0skZ ZpZbapo0 pZ0opm0o l0Z0ZPZ0 PZ0MPZ0Z Z0M0L0ZP BOPZ0ZPZ S0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3775 8 7 6 5 4 3 2 1
3778
0Zrl0skZ opZbopap 0Z0o0mpZ Z0Z0mPZ0 0Z0ZPZPZ Z0M0A0Z0 POPMBZ0O S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3780
0Zrl0skZ obZ0apop 0o0opm0Z m0Z0Z0O0 0Z0MPO0Z ZBM0AQZ0 POPZ0Z0O S0Z0ZRJ0 a
c
0Zrl0skZ ZpZ0opap pZ0o0mpZ m0Z0ZPA0 PZ0ZPZ0Z ZPM0Z0Z0 0O0ZBZPO S0ZQZRZK a
3777 8
b
3779
0Zrl0skZ ZbZnopap pZ0o0mpZ ZpZ0Z0Z0 0Z0ZPZPO ZNM0APZ0 POPL0Z0Z ZKZRZBZR a
0Z0ZrZkZ ZbsnapZp pZ0ZqmpZ ZpZ0o0A0 0Z0ZPZ0M O0MBZQZP 0OPS0ZPZ Z0Z0ZRZK a
3776 8
Sicilian exchange sacrifice on c3
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZ0s0j ZbZ0apo0 pZ0o0m0o lpZ0oPZ0 0Z0ZPZ0Z O0MBZ0ZP 0OPS0APZ Z0ZRL0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3781 8 7 6 5 4 3 2 1
3784
rZ0ZkZ0s ZplbZpZ0 pZnopa0o Z0Z0Z0Z0 0Z0MPZ0Z Z0M0Z0Z0 POPLBO0Z Z0JRZ0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3786
0s0ZkZ0s Zbl0Zpo0 pm0ZpZ0o ZpZ0O0a0 0Z0M0Z0Z Z0M0Z0L0 POPZ0ZPO ZKZRZBS0 a
c
rm0lka0s ZbZnZpop pZ0ZpZ0Z Z0Z0Z0O0 0o0M0M0Z Z0Z0APZ0 POPL0Z0O S0Z0JBZR a
3783 8
b
3785
rZbZkZ0s Zpl0Zpo0 pm0opa0o Z0Z0Z0Z0 0Z0MPO0Z ZBM0Z0Z0 POPZQZPO Z0JRZ0ZR a
0Zks0a0s ZbZnZpZ0 pZ0Z0Z0o l0ZpoPOn 0o0M0Z0O Z0Z0A0ZB POPLNZ0Z ZKZRZ0ZR a
3782 8
Other Sicilian piece sacrifices
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZkZ0s ZqZ0mpo0 pZ0apZ0Z ZpZ0Z0Ap 0Z0M0Z0L Z0Z0Z0O0 POPZ0O0O S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3787 8 7 6 5 4 3 2 1
3790
rZ0ZkZ0s ZbZna0Zp pZ0opo0Z l0Z0Z0A0 No0Z0O0Z Z0ZBZ0Z0 POPL0ZPO Z0JRS0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3792
rm0Z0s0j Z0l0apop 0Z0opm0Z obZ0Z0A0 0o0ZPM0L ZBZ0ZNZ0 POPZ0OPO Z0ZRZRJ0 a
c
rZbZrZkZ ZplnapZp pZnopZpZ Z0Z0Z0O0 0Z0MPOBZ Z0M0A0Z0 POPZ0Z0O S0ZQZRJ0 a
3789 8
b
3791
rm0lka0s ZbZ0Zpop pZ0o0Z0Z Z0Z0oPZ0 No0MnZ0Z Z0ZBA0Z0 POPZ0ZPO S0ZQZRJ0 a
rZblka0s ZpZnZpo0 pZnopZ0o Z0Z0Z0O0 0Z0MPO0Z Z0M0A0Z0 POPZ0Z0O S0ZQJBZR a
3788 8
Other Sicilian piece sacrifices
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZbZ0skZ Z0lnapo0 pZ0opZpZ Z0Z0Z0Z0 0s0MPO0O Z0M0ZQZB 0OPZ0Z0Z Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3793 8 7 6 5 4 3 2 1
3796
rZqZka0s ZbZnZpop pZ0opm0Z ZpZBZ0A0 0Z0MPZ0Z Z0M0Z0Z0 POPZQOPO Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3798
rZ0ZkZ0s Zblnapo0 pZ0opm0o ZpZ0Z0Z0 0Z0MPO0A Z0MQZBZ0 POPZ0ZPO Z0JRZ0ZR a
c
rm0lkZ0s ZbZ0apop pm0opZ0Z ZpZ0Z0O0 0Z0MPZ0O O0M0A0Z0 0OPL0O0Z S0Z0JBZR a
3795 8
b
3797
rZblka0Z Z0ZnZpo0 pZ0opO0Z ZpZ0Z0Z0 0Z0MPZ0Z Z0Z0Z0Zr POPZBA0O S0ZQJ0ZR a
rZ0ZkZ0s Z0lbapop pZ0opm0Z m0Z0Z0Z0 No0MPZPZ Z0ZBA0Z0 POPZQO0O Z0JRZ0S0 a
3794 8
Other Sicilian piece sacrifices
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0sbZkZ0s Z0lnapop pZ0opZ0Z ZpZ0Z0O0 0Z0MPZ0Z ZPM0A0Z0 0OPZQO0O Z0JRZ0S0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3799 8 7 6 5 4 3 2 1
3802
rZ0lkZ0s ZbZ0apo0 po0opm0o Z0Z0Z0Z0 0Z0MPO0Z ZBMQZ0Z0 POPZ0ZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3804
rZ0lkans ZbZnZpop pZ0opZ0Z ZpZ0Z0Z0 0Z0MPZ0Z ZBM0Z0Z0 POPZ0OPO S0AQZRJ0 a
c
0ZrlkZ0s ZpZbZpap pZ0opo0Z Z0Z0Z0ZQ 0ZnMPO0Z ZBM0Z0Z0 POPZ0ZPO Z0JRS0Z0 a
3801 8
b
3803
0sbZkZrZ Z0lnapo0 pZ0opm0o ZpZ0Z0Z0 0Z0MPO0A Z0M0Z0L0 POPZBZPO Z0JRZRZ0 a
rm0lkZ0s ZbZ0apop pZ0opm0Z Z0Z0Z0A0 No0MPZ0Z ZBZ0ZQZ0 POPZ0OPO S0Z0J0ZR a
3800 8
Other Sicilian piece sacrifices
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0skZ0s ZplbapZ0 pZ0opm0o Z0Z0Z0o0 0Z0MPOPZ ZBM0Z0Z0 POPL0Z0O ZKZRS0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3805 8 7 6 5 4 3 2 1
3808
rZbZkZ0s Z0l0apop pZ0opZ0Z Zpm0Z0O0 0Z0MPZ0Z ZPM0A0Z0 0OPZQO0O ZKZRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3810
rZbZka0s ZpZ0ZpZp pZ0opo0Z Z0l0Z0ZQ 0Z0MPZ0Z Z0M0Z0Z0 POPZ0OPO S0Z0S0J0 a
c
rZbZnskZ ZqZ0apop pZ0opZ0A Zpm0Z0Z0 0Z0MPZ0Z OBM0Z0L0 0OPZ0OPO S0Z0S0J0 a
3807 8
b
3809
rZ0sbZkZ o0l0apop 0Z0opm0Z ZpZ0Z0A0 0Z0MPZ0Z Z0M0Z0S0 POPL0OPO Z0JRZ0Z0 a
0Z0ZkZrZ Z0ZbapZp nl0opo0Z o0s0Z0ZN 0o0MPOPZ ZPZ0SBZ0 PZPL0Z0O ZKZRZ0Z0 a
3806 8
Other Sicilian piece sacrifices
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Zka0s ZbZnZpo0 pZ0opZ0Z lpm0Z0A0 0Z0MPZ0O O0M0Z0Z0 0OPL0OBZ Z0JRS0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3811 8 7 6 5 4 3 2 1
3814
rZ0Zka0s Z0lbZpop pm0opZ0Z ZpZ0Z0O0 0Z0MPO0Z Z0M0Z0Z0 POPL0Z0O ZKZRS0A0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3816
rZrZ0j0Z opZbZpaR 0Z0opZpZ Z0m0Z0O0 0Z0MPZ0Z ZBZ0APZ0 POPZ0Z0Z ZKZ0Z0ZR a
c
rmbZkZ0s ZqZ0apop pZ0opm0Z Z0Z0Z0A0 0o0MPZ0Z ZBM0ZQZ0 POPZ0OPO Z0JRS0Z0 a
3813 8
b
3815
0sbZkZ0s Z0lnapop pZ0opZ0Z ZpZ0Z0O0 0ZnMPZ0Z O0MBA0Z0 0OPZQO0O Z0JRS0Z0 a
rZ0lkZ0s ZpZbapo0 pZ0opZnZ Z0Z0m0O0 0Z0MPZ0Z ZBM0A0L0 POPZ0Z0O Z0JRZRZ0 a
3812 8
Other Sicilian piece sacrifices
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZblka0s ZpZ0ZpZ0 pZ0opmno Z0Z0Z0o0 0Z0MPZPZ Z0M0A0ZP POPZQOBZ Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3817 8 7 6 5 4 3 2 1
3820
0Zks0Z0s Zplbapo0 pZ0opZ0Z Z0Z0m0On 0Z0MPZ0Z Z0M0APZ0 POPLBZ0Z Z0JRZ0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3822
0Zks0Z0s Zblnapop pZ0opZ0Z mpZ0Z0O0 0Z0MPO0Z Z0MBA0ZQ POPZ0Z0O ZKZRZ0ZR a
c
rm0ZkZ0s Zbl0mpop pZ0opZ0Z ZpZ0Z0Z0 0Z0MPZ0Z Z0MBZ0Z0 POPZ0OPO S0ZQS0J0 a
3819 8
b
3821
rZbZkZ0s Zpl0apop pZ0opm0Z Z0Z0Z0A0 0Z0MPZ0Z Z0M0Z0Z0 POPL0OPO S0Z0S0J0 a
0ZrZkZ0s Z0lbapZ0 pZnopZpZ ZpZ0Z0An 0Z0ZPZ0O ONM0Z0Z0 0OPLBORZ ZKZRZ0Z0 a
3818 8
Other Sicilian piece sacrifices
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0ZkZns Zbl0Zpa0 pZ0opZ0o ZpZ0Z0o0 0Z0MPZ0Z Z0MBZ0A0 POPZ0OPO S0ZQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3823 8 7 6 5 4 3 2 1
3826
rZbZkZ0s Z0l0Zpop pZ0opZ0Z Zpm0ZPa0 0Z0MPZ0Z Z0M0ZQZ0 POPZ0Z0O ZKZRZBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3828
0Zks0Z0s Zblnapop pZ0opm0Z ZpZ0Z0A0 0Z0MPO0Z Z0MBZ0L0 POPZ0ZPO Z0JRS0Z0 a
c
rZ0Zka0s ZblnZpop pZ0opm0Z ZpZ0Z0Z0 0Z0MPA0Z Z0M0ZBZ0 POPZ0OPO S0ZQS0J0 a
3825 8
b
3827
rZbZka0s Z0l0Zpop pZ0opO0Z Zpm0Z0O0 0Z0MPZ0Z Z0M0ZQZ0 POPZ0Z0O Z0JRZBZR a
rmbZkZ0s Z0l0apop pm0opZ0Z ZpZ0Z0O0 0Z0MPO0Z O0M0A0Z0 0OPZBZ0O S0ZQJ0ZR a
3824 8
Other Sicilian piece sacrifices
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZkZ0s Z0l0Zpo0 pZ0opa0o Zpm0Z0Z0 0Z0MPO0Z ZBM0Z0Z0 POPZQZPO ZKZRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3829 8 7 6 5 4 3 2 1
3832
rZbZka0s ZpZ0Z0op pZ0opm0Z Z0Z0Z0Z0 0ZqMPZ0Z Z0M0A0Z0 POPZ0ZPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3834
rZbZkZ0s Z0lpZpo0 pZ0ZpZ0Z Zpa0O0Zp 0Z0Z0OnZ Z0MQZ0Z0 POPZBZPO S0A0ZRZK a
c
rZ0ZrZkZ Z0l0Zpop pZ0Zba0Z ZpZ0o0Z0 0Z0ZPZ0L O0MBZ0Z0 0OPZ0ZPO S0Z0ZRZK a
3831 8
b
3833
rZ0sbZkZ Z0l0Zpop pZ0o0a0Z ZpZPm0Z0 PZ0ABZ0Z ZNZ0Z0Z0 0OPZQZPO S0Z0ZRZK a
0ZrZ0skZ o0l0Zpop 0o0o0a0Z Z0ZBZ0Zb 0Z0ZPZ0Z ZQZ0A0O0 POPZ0S0O Z0J0ZRZ0 a
3830 8
Other Sicilian piece sacrifices
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ ZpZ0Zpop pZ0S0m0Z Z0Z0o0Z0 0ZqZPZ0Z ZNM0L0Z0 PO0Z0OPO S0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3835 8 7 6 5 4 3 2 1
3838
0Z0Z0skZ o0o0Zpop 0ZpZ0Z0Z Z0Z0Z0Z0 0Z0ZqZ0Z Z0O0Z0Z0 PO0O0ZQZ SNA0Z0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3840
rZblnskZ o0o0apop 0ZpZ0Z0Z Z0ZpO0Z0 0Z0Z0O0Z ZPM0Z0Z0 PZPZBZPO S0AQZRJ0 a
c
0sbZnskZ ZpZnZ0Zp pZ0o0Z0Z O0oPZpZ0 0ZNZpO0Z Z0M0Z0Z0 0OPZBZPO S0Z0ZRJ0 a
3837 8
b
3839
rm0l0skZ ZpZ0apop 0Z0o0m0Z o0ZPo0Z0 0ZPZ0Z0Z ZNZ0ABZ0 PO0Z0OPO S0ZQZRJ0 a
rZbZ0j0Z o0Z0lpa0 0Z0Z0Z0s Z0opOpZp 0Z0Z0ZpZ Z0Z0L0ZP POPZNOPA S0Z0S0J0 a
3836 8
Blockade
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0srZkZ ZplnZpZp pZ0a0opZ Z0o0Z0Z0 0Z0O0Z0O Z0OQANO0 PO0Z0O0Z ZKZRS0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3841 8 7 6 5 4 3 2 1
3844
rZ0lrZkZ o0Z0Z0ap 0o0Z0ZpZ Z0oPm0Z0 0Z0ZPZ0Z Z0Z0A0Z0 PZ0ZQMPO Z0S0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3846
0ZrlrZkZ ZpZ0Zpop panZ0Z0Z Z0Z0Z0Z0 0ZNo0M0Z O0Z0ZQO0 0O0ZPO0O Z0S0S0J0 a
c
0ZrZ0s0Z Z0Znlpjp pZnZ0ZpZ ZpZ0o0Z0 0Z0Z0Z0Z Z0ZPMBO0 PO0L0O0O S0S0Z0J0 a
3843 8
b
3845
0s0Z0skZ o0Zblpop 0ZpZ0Z0Z ZnZpZ0Z0 NZ0O0Z0Z ZPZ0O0O0 0Z0Z0OBO Z0SQZRJ0 a
0ZrZrZ0Z ZpZbZkZp 0a0ZpmpZ o0ZpZ0Z0 0Z0M0APZ Z0O0ZPZ0 PO0Z0ZPZ Z0JRSBZ0 a
3842 8
Blockade
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZnZ0s Z0Z0Z0j0 0o0l0opZ oPoPo0Zp 0ZPZPZ0O Z0Z0L0OB PZ0Z0S0Z Z0Z0ZKZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3847 8 7 6 5 4 3 2 1
3850
rZbl0skZ ZpZpapop pZ0ZpZ0Z Z0Z0m0Z0 0ZPZNZ0Z Z0Z0M0O0 PO0LPOBO S0Z0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3852
rmblnskZ opZ0Zpap 0Z0Z0ZpZ Z0oPo0Z0 0ZPZPZ0Z Z0M0ZNZ0 PO0ZBZPO S0AQZRJ0 a
c
rZblns0j opo0m0Z0 0Z0o0a0Z ZNZPZ0op 0OPZPo0Z Z0Z0ZPZ0 PA0ZBMKO ZRZQZRZ0 a
3849 8
b
3851
0Z0sqZkZ Z0Z0spop 0ZnZ0ZbZ opZ0O0Z0 0ZpO0LBZ O0O0S0Z0 0A0Z0ZPO Z0Z0S0J0 a
rmbl0skZ opZ0Z0ap 0Z0o0Z0Z Z0oPopZn 0ZPZ0Z0Z Z0MBAPZ0 POQZNZPO S0Z0J0ZR a
3848 8
Blockade
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ opo0mpap 0Z0o0Z0Z Z0OPZ0o0 0O0ZPoBZ Z0M0Z0Z0 PZ0L0OPO Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3853 8 7 6 5 4 3 2 1
3856
rZblnskZ Z0Z0mpap pZ0Z0ZpZ Z0M0o0Z0 NO0oPZ0Z A0Z0Z0Z0 PZ0ZBOPO ZRZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3858
rZbl0s0j o0Z0m0a0 0Z0o0m0o Z0oPZpZ0 0ZPZpO0A ZNM0Z0Z0 PZQZBZPO ZRZ0ZRJ0 a
c
rZ0l0skZ ZpZ0mpmp 0Z0o0ZpZ oPoPZ0Z0 0Z0ZPS0Z OPZ0Z0Z0 0Z0MBZPO S0ZQZ0J0 a
3855 8
b
3857
0sbl0skZ Z0Z0mpap pZpZ0mpZ Z0Z0o0A0 0OPoPZ0Z ONM0Z0Z0 0Z0ZBOPO S0ZQZRJ0 a
rZnl0s0j ZpZ0Z0a0 0ZpoPm0o Z0Z0ZpZ0 0OPZpOPZ Z0M0A0Z0 0ZQZBZ0O ZRZRZ0J0 a
3854 8
Blockade
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrZkZ ZpZ0ZpZp 0Zpo0lpZ o0m0a0Z0 0ZPZPZ0Z ZPM0L0Z0 PA0Z0OPO Z0ZRSBJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3859 8 7 6 5 4 3 2 1
3862
rZ0lnskZ Z0obZ0a0 0o0o0Z0o o0ZPZpZ0 0ZPZpO0Z ZPM0A0Z0 0OQZBZPO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3864
rZ0lnZkZ Z0obZra0 0o0Z0Zpo o0oPopZ0 0ZPZPZ0Z O0M0Z0Z0 0OQABOPO S0Z0ZRZK a
c
rZ0lkZ0s ZpZbapo0 pZnopm0o Z0Z0Z0Z0 0Z0ZPZPZ ZNM0Z0Z0 POPZQOBO S0A0ZRJ0 a
3861 8
b
3863
rZ0Z0skZ opZbl0a0 0Z0o0Z0o Z0oPo0o0 0ZPZ0Z0Z Z0M0Z0M0 PO0ZQOPO S0ZRZ0J0 a
rZbl0skZ opZ0mpa0 0Z0o0Zpm Z0oPZ0Zp 0ZPZPA0Z Z0M0Z0Z0 PONZBZPO S0ZQZRJ0 a
3860 8
Blockade
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0ZkZ0s Zplbapo0 pZnopm0o Z0Z0Z0Z0 PZ0ZPZPZ Z0M0Z0MP 0OPZ0OBZ S0AQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3865 8 7 6 5 4 3 2 1
3868
0Z0Zrj0Z Zpl0ZpZ0 rZ0mPZ0Z o0Z0o0Z0 PZ0Z0Z0L Z0ZRZ0Z0 0OPZ0OPO Z0ZRZ0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3870
0Z0l0Z0Z o0ZrSpjp 0o0Z0ZpZ Z0o0Z0Z0 0Z0o0Z0Z ZPZPZ0ZP PZPZQOPZ Z0Z0Z0J0 a
c
rZ0ZrZ0Z o0o0ZpZk 0Z0o0Zpo Z0o0Z0Z0 0ZPZ0m0Z Z0M0ZBZ0 PORZPO0l Z0ZRLKZ0 a
3867 8
b
3869
0Z0s0ZkZ ZpZ0Z0op 0ZpZ0Z0Z onO0ZbZ0 0ZKZ0M0O O0Z0ZPZ0 0Z0Z0APZ Z0Z0Z0ZR a
0Z0Z0L0Z Z0Z0ZpZk poBZbZpO Z0Z0O0J0 PZ0Z0Z0Z Z0Zns0Z0 0Z0s0Z0O Z0Z0Z0Z0 a
3866 8
Blockade
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZRZ0Z0Z Z0Z0ZkZp 0ZPZpZ0Z Z0ZbJpO0 0Z0ZpZ0Z Z0s0Z0Z0 0Z0Z0Z0Z ZRZ0Z0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3871 8 7 6 5 4 3 2 1
3874
0Z0Z0Z0Z Z0Z0Z0ap 0S0Z0ZpZ o0Z0o0Z0 ko0ZrZPs Z0ZRA0Z0 POPZKZ0Z Z0Z0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3876
rZ0Znj0Z ZpZrZ0a0 0o0Z0ZPZ Z0ZnoNM0 0Z0Z0Z0Z Z0ZPZ0Z0 PO0Z0ZKZ S0A0Z0ZR a
c
rZ0ZBa0s oQZ0Z0Z0 0ZpZ0o0o j0Z0l0Z0 0Z0ZPZ0Z Z0M0A0Z0 PO0Z0ZPO Z0Z0Z0J0 a
3873 8
b
3875
rZbl0skZ opo0apZp 0ZnZ0Z0L Z0Z0Z0Z0 0ZBoNZ0Z Z0Z0Z0Z0 POPZ0OPO SNZ0ZRJ0 a
0j0A0Z0s ZpZ0LpZ0 0Z0ZbZpO o0Z0O0Z0 PZ0o0o0Z ZqZ0Z0Z0 0ZRZ0O0O Z0J0Z0Z0 a
3872 8
Blockade
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0MkZ ZpZ0opZp pZno0ZpZ Z0ZNZ0Z0 PZ0ZPOnZ Z0Z0Z0Z0 0aPJBlPO S0ZQZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3877 8 7 6 5 4 3 2 1
3880
rZ0Zrj0Z o0Z0SpZp 0lpZbL0Z Z0Z0Z0Z0 0o0O0Z0Z Z0Z0Z0S0 PO0Z0OPO Z0Z0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3882
rZ0ZrZ0j obZ0l0o0 0o0ZNm0o Z0a0Z0Z0 0ZBZ0Z0Z Z0O0ZPZ0 POQZ0ZPO Z0Z0SRZK a
c
0Z0ZrZkZ o0ZQZpop 0Z0Z0l0Z Z0Z0Z0Z0 0Z0Z0Z0Z Z0Z0Z0O0 PZ0ZrO0O Z0Z0ZRJR a
3879 8
b
3881
0Zrl0skZ ZbZnapo0 0o0Z0Z0o o0ZpMBZ0 0Z0o0M0Z Z0Z0O0Z0 POQZ0OPO Z0SRZ0J0 a
rZbZ0skZ o0o0Zpop 0ZBZ0Z0Z Z0Z0Z0Z0 0L0Z0Z0Z Z0ZqZNm0 0O0Z0OPO S0Z0Z0JR a
3878 8
Blockade
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZqZks o0ZbopZp 0Z0Z0ZpL ZpZ0o0On 0Z0Z0Z0Z ZBM0ZPZ0 POPZ0Z0Z Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3883 8 7 6 5 4 3 2 1
3886
0s0Z0skZ Z0obl0mp pZ0ZpZnZ ZpZPZ0ZQ 0ZPZ0ZNZ Z0ZBORZ0 0Z0Z0ZPO A0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3888
rZ0ZrZkZ opZblpa0 0Z0o0m0Z Z0oPm0op PZ0ZPZ0Z Z0M0ZPA0 0O0ZBZPO S0ZQSNJ0 a
c
rlrZ0ZkZ obZnapo0 0Z0Z0Z0o Z0opOBZ0 0o0Z0Z0Z Z0Z0ANZ0 PO0Z0OPO Z0SQS0J0 a
3885 8
b
3887
rZ0Z0skZ Zpl0m0o0 pZ0obO0Z Z0Z0ZpZQ 0Z0Z0O0Z Z0O0Z0ZR PZPA0ZPO S0Z0Z0ZK a
rZ0ZnZ0Z opZ0l0ok 0ZpZBmRo Z0Z0Z0Z0 0ZpZ0O0Z ZPZ0Z0ZP PA0Z0ZQJ Z0Z0Z0Z0 a
3884 8
Blockade
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZkZ opZ0Zpop qZparm0Z Z0Z0Z0Z0 0O0ZPZ0Z O0O0ZQO0 0A0MRZ0O S0Z0Z0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3889 8 7 6 5 4 3 2 1
3892
rZbs0ZkZ ZpZ0Zpap pZnlpZpZ Z0Z0Z0M0 PZ0O0Z0Z Z0O0Z0Z0 0ZBZ0OPO S0AQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3894
rZ0l0skZ ZpZnapop 0Z0o0Z0Z o0ZPobZ0 PZ0Z0Z0Z ZNZ0A0Z0 0OPLBOPO S0Z0ZRJ0 a
c
rZbj0Z0s opZna0Zp 0ZpZ0opZ Z0Z0o0Z0 0ZPZ0Z0O Z0M0A0O0 PO0ZPO0Z Z0JRZBZR a
3891 8
b
3893
0Z0lrZkZ obZ0Zpap 0o0ZpZpA Z0ZnZ0Z0 0Z0OBZNZ O0Z0Z0Z0 0O0L0OPO Z0S0Z0J0 a
rZbl0skZ opZ0Zpa0 0Z0o0m0o ZBoPo0Z0 Pm0ZPZ0Z Z0M0ZPA0 0OPM0ZPZ S0ZQS0J0 a
3890 8
Weak square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
RZnZ0skZ Z0Z0Z0Zp 0Z0o0lbZ ZNoPopZn 0ZPZ0Z0Z Z0Z0ZPO0 0Z0LBM0O Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3895 8 7 6 5 4 3 2 1
3898
rZbZkZ0s Z0l0Zpop pZpZpm0Z ZpZ0Z0Z0 Na0ZPZ0Z Z0Z0A0Z0 POPZBOPO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3900
rZ0Z0skZ Z0Z0opZ0 0l0o0ZpZ mpoPZ0Z0 PZ0Z0Z0Z ZPZ0ZBO0 0L0ZPO0Z S0Z0ZRJ0 a
c
0Z0Zka0s spZ0Zpo0 pZbo0m0o Z0Z0o0Z0 0Z0ZPZ0Z Z0M0Z0A0 POPZBOPO Z0JRZ0ZR a
3897 8
b
3899
rZrZ0ZkZ oqZnapop 0o0Zpm0Z Z0Z0Z0Z0 0O0MPZ0Z O0Z0ZQO0 0A0M0OKO S0S0Z0Z0 a
0sbl0skZ o0onopap 0o0Z0ZpZ Z0Z0Z0Z0 0Z0O0ZnZ Z0ZNONO0 PO0ZQOBO S0A0ZRJ0 a
3896 8
Weak square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0L0Z0m0Z Z0ZqZko0 0ZbZpo0o opZpZ0ZN 0Z0O0MPZ Z0Z0O0ZP PO0Z0O0Z Z0Z0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3901 8 7 6 5 4 3 2 1
3904
rZbl0skZ Z0Z0mpop pZ0Z0Z0Z ZpZpZ0Z0 0Z0O0Z0Z Z0M0ZNZ0 PO0Z0OPO S0ZQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3906
rZblrmkZ opZ0Zpa0 0Z0o0m0o Z0oPo0o0 0ZPZPZ0Z O0M0ZNOP 0O0Z0O0Z S0AQSBJ0 a
c
qZ0Z0skZ Lbm0Zpa0 0ZpZnZpo Z0Z0o0Z0 0O0ZPZ0Z Z0M0A0ZP 0Z0M0OPZ Z0Z0SBJ0 a
3903 8
b
3905
0sbl0skZ Z0o0o0ap pZ0o0ZpZ mpZPm0Z0 0Z0M0Z0Z Z0M0Z0OP PO0Z0OBZ S0AQZRJ0 a
rZ0Z0skZ Z0l0a0op pm0o0Z0Z mpoPobZ0 0Z0ZNZ0Z Z0O0ZNZP POBZ0OPZ S0AQS0J0 a
3902 8
Weak square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0ZkZns opZqZ0Zp 0Z0o0ZpZ Z0oPobZ0 0ZPZ0Z0Z Z0OBZNZ0 PZ0Z0OPO S0AQJ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3907 8 7 6 5 4 3 2 1
3910
0ZrZrZkZ o0Z0Zpap 0onoplpZ ZPo0Z0Z0 0ZPZ0O0Z O0ZPL0O0 0Z0ZNOBO ZRZ0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3912
0l0s0ZkZ opZ0Zpa0 0mpZ0mpZ M0Z0o0Z0 0OPZ0Z0o L0Z0Z0OP PA0ZPOBZ Z0Z0ZRJ0 a
c
0ZrZ0ZkZ o0l0spap Ro0ZnZpZ ZPo0o0Z0 QZPZ0Z0Z Z0O0Z0O0 0O0Z0OBO Z0A0S0J0 a
3909 8
b
3911
rZbZ0ZkZ opZnZpap 0Zps0ZpZ Z0Z0o0Z0 PZ0ZPZ0Z ZBM0A0Z0 0OPZ0OPO ZRZ0ZRJ0 a
rZbZkZ0s ZpZnZpZ0 pZ0o0Z0o O0ZqZ0o0 0O0ZpZ0Z Z0O0O0ZP 0Z0MNZPZ Z0S0LRJ0 a
3908 8
Weak square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0ZkZ o0o0Zrap 0Z0o0mnZ Z0ZPo0o0 PONZPo0Z A0M0ZPZ0 0Z0ZBZPO S0ZQZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3913 8 7 6 5 4 3 2 1
3916
rZ0ZnskZ Z0lbZpap 0o0o0ZpZ o0mPo0Z0 PZ0ZPZ0Z MPM0Z0ZP 0Z0Z0OPZ ZRAQSBJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3918
rZ0l0skZ opZbZpa0 0m0o0Z0o Z0ZPo0o0 0Z0ZPm0Z Z0M0M0A0 PO0ZBOPO S0ZQZRJ0 a
c
rZ0ZqskZ Zpo0Z0an nZ0o0Zpo o0ZPobZ0 0ZPZ0Z0A O0M0Z0Z0 0O0MBOPO S0ZQZRJ0 a
3915 8
b
3917
rZbl0skZ ZpZnZpa0 0Z0o0Zpo o0oPo0Z0 0ZPZPZ0Z ZQM0A0Z0 PO0ZBOPO S0Z0S0J0 a
rZ0Z0snZ ZpZ0lpak nZ0o0Zpo o0oPZ0Z0 0ZPZPA0Z Z0M0Z0ZR PO0LBZPO Z0Z0S0J0 a
3914 8
Weak square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ Z0Z0Zpap plpo0mpZ Z0Z0m0Z0 0OPZPZ0Z Z0M0ZPZ0 0Z0ABZPO S0ZQZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3919 8 7 6 5 4 3 2 1
3922
0s0Z0skZ Z0ZqZ0ap 0ZnobZ0Z opZNopZQ 0Z0Z0Z0Z Z0O0M0O0 PO0Z0OBO S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3924
0Zks0Z0s Z0lnapop pZbopZ0Z ZpZ0Z0O0 0Z0LPZ0O Z0M0APZ0 POPZ0Z0Z Z0JRZBZR a
c
0sqZrZkZ obZnapo0 0ono0Z0o ZBoNo0Z0 QOPZPZ0Z O0ZPANZ0 0S0Z0OPO Z0Z0ZRJ0 a
3921 8
b
3923
0Z0s0skZ Z0Z0Z0op pl0o0Z0a ZpZ0onZ0 0M0Z0o0O Z0OQZBZ0 PO0Z0OPZ Z0ZRJ0ZR a
0Zrl0skZ o0m0apop 0Z0Z0Z0Z A0opO0Z0 0Z0Z0Z0Z ZPZQZNO0 PZ0Z0OKO S0Z0S0Z0 a
3920 8
Weak square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zbs0skZ Zpl0apop pZ0opmnZ Z0Z0Z0A0 0ZPL0Z0Z ZNM0Z0O0 PO0ZPOBO Z0SRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3925 8 7 6 5 4 3 2 1
3928
0Z0s0Z0j ZpZ0lpob 0ZpZ0Z0o o0m0mPZ0 0Z0ZPZ0Z Z0M0A0OP POQZRZBJ Z0Z0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3930
0Z0s0ZkZ opZ0spo0 0ZnZ0l0o Z0opZbZ0 0Z0O0Z0Z OQO0O0O0 0Z0M0OBO S0Z0ZRJ0 a
c
0Zks0Z0s opoqZ0o0 0Z0Zbo0Z Z0Z0Z0Zp 0Z0O0Z0O Z0O0A0L0 PZPZ0OPZ S0Z0ZRJ0 a
3927 8
b
3929
rZ0Z0skZ opZqZpap nZ0Z0mpZ Z0ZpoPZ0 0Z0ZPZ0Z Z0MPZ0OP PO0ZNZKZ S0AQZRZ0 a
kZrZ0a0Z oblrZpZ0 0o0ZpZpZ Z0onO0Ap PmNo0Z0O Z0ZPZNO0 0OPZQOBZ Z0S0S0J0 a
3926 8
Weak square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrmkZ opo0ZpZ0 0Z0Z0lnZ O0Z0o0o0 0Z0ZPZ0o Z0O0L0OP 0O0MBO0M S0ZRZ0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3931 8 7 6 5 4 3 2 1
3934
0ZqZ0skZ ZrZnZ0ap po0o0opZ Z0Z0oPZ0 0O0ZPZ0Z Z0M0A0ZP PZ0ZQZPZ Z0ZRZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3936
0mbZqskZ s0a0Z0op 0ZpZpZ0Z ZpOpMpZ0 pO0OnA0O O0Z0ZNO0 0Z0ZPOBZ S0ZQZRJ0 a
c
rZrZ0ZkZ Z0Z0opZp pZ0o0apZ ZqZPZ0Z0 0ONZ0Z0Z O0Z0Z0Z0 0Z0L0OPO Z0S0ZRJ0 a
3933 8
b
3935
rZ0Z0j0Z Zno0l0Z0 0o0Z0o0o o0ZPo0oP 0O0Z0Z0Z O0O0L0Z0 0ZBZ0OPZ Z0ZRZ0J0 a
rZ0Zkans Z0lbZpop pZ0o0Z0Z m0Z0oPZ0 Bo0MPZ0Z Z0M0A0Z0 POPZ0ZPO S0ZQZRJ0 a
3932 8
Weak square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZkZ0s Zbl0apop pZpZ0m0Z Z0Z0oPZ0 0Z0oPZ0Z Z0MBZ0L0 POPZ0ZPO S0A0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3937 8 7 6 5 4 3 2 1
3940
0Z0Z0skZ ZpoqZ0op pZpa0ZnZ Z0Z0orZ0 0Z0Z0Z0Z Z0ZPA0ZP POPMQOPZ S0Z0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3942
rZrZnmkZ ZpZbZpl0 0Z0o0Z0S Z0ZPo0O0 0Z0ZPZ0Z oPM0Z0Z0 PZ0LBM0Z Z0Z0ZKS0 a
c
0Z0srZkZ ZblnZ0ap pZpZ0ZpZ Z0Z0opZn NoPZPZ0Z ZNZ0APO0 PO0ZBL0O ZKS0Z0ZR a
3939 8
b
3941
rZ0l0skZ Z0Z0ZpZ0 0Zpobm0o o0a0Z0o0 0ZPZPS0A O0MBZ0Z0 0O0L0ZPO Z0Z0ZRZK a
rZ0Z0skZ Z0Zbm0ap pZ0o0mpZ lpZPo0Z0 0Z0ZPZPZ Z0M0APZ0 PO0L0Z0Z ZKZRZBMR a
3938 8
Weak square
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Zka0s ZqZnZpop pZ0o0Z0Z O0ZPo0Z0 RoBZ0Z0Z ZNZ0ZPZ0 0OPZQZPO Z0Z0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3943 8 7 6 5 4 3 2 1
3946
0Z0j0Z0Z ZRZ0Z0Zp 0Z0ZpZpZ M0Z0Z0O0 0ZPZ0l0a Z0Z0Z0Z0 PZ0sQZ0O Z0Z0Z0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3948
0j0Z0Z0Z o0Z0apZ0 QZpZpZpZ ZpZpOnZ0 0Z0Z0A0Z O0ZBZqZ0 KOPZ0O0Z Z0Z0Z0Z0 a
c
rZ0Z0Zrj opl0ZpZp 0Z0ZbZ0Z ZRZ0ZpZ0 0Z0Z0O0Z Z0Z0Z0MP PO0ZQZBJ Z0Z0Z0ZR a
3945 8
b
3947
0ZrZ0Z0Z o0Z0oNZk 0Z0oPZpo Z0Z0Z0Zq 0O0L0OnO Z0Z0Z0O0 PZ0Z0Z0Z Z0Z0S0J0 a
rZ0Z0ZrZ Z0l0ZpZk po0opO0o Z0Z0Z0ZQ bZ0ZPZ0Z Z0ZPS0Z0 0O0M0ZPO Z0Z0ZRZK a
3944 8
Perpetual check
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZrZkZ S0Z0Zpo0 0o0Z0Z0o Z0Z0M0Z0 0Z0Z0O0Z O0s0Z0mP 0Z0Z0ZKZ Z0Z0S0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3949 8 7 6 5 4 3 2 1
3952
rZ0ZkZ0Z ZbZ0Zplp pZ0ZpZrZ Z0o0Z0Z0 0Z0ZnA0Z oPZ0ZPO0 PZPZBZ0O S0L0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3954
0Z0Z0Z0j o0Z0Z0o0 0o0ZpZ0Z Z0Z0Z0Z0 0ZPZqO0Z O0Z0Z0ZP 0Z0orZPJ Z0ZQZRZ0 a
c
0Z0Z0akZ Z0Z0Z0Z0 0Z0Z0Z0o Z0ZpA0o0 0o0OpZPZ ZPm0Z0ZP 0Z0Z0OKZ sBZ0ZRZ0 a
3951 8
b
3953
rmqZ0skZ o0Z0Zpop 0o0Zpm0Z Z0Z0Z0Z0 0ZBO0Z0Z Z0O0ZQZ0 PZ0A0OPO S0ZRZ0J0 a
0Z0Z0Z0l Z0Z0okZr pZ0o0o0Z Z0Z0Z0Zr 0ZPAPOQZ ZPZ0Z0Z0 PZ0Z0ZRZ Z0Z0Z0J0 a
3950 8
Perpetual check
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0Z0Z0Z ZRZ0Z0Zp 0Z0o0Zpj O0aPZ0Z0 0Z0Z0o0Z Z0ZnZPlP 0Z0ZQZPZ Z0Z0ZBZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3955 8 7 6 5 4 3 2 1
3958
0Z0s0akZ Z0Z0Z0op 0Z0Z0o0Z Z0Z0Z0Z0 pZplQM0Z ZbZ0M0O0 0Z0Z0O0O Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3960
0s0Z0Z0s Z0Z0opj0 0ZnobmpZ lpZNZ0Zp 0Z0ZPZ0Z O0Z0APZ0 0L0ZBZPO ZNZ0ZRJ0 a
c
0Z0Z0skZ Z0Z0Z0Z0 0ZpZrZpZ Z0ZpZnZ0 RZqO0Z0O Z0Z0O0ZP 0S0Z0O0Z Z0ZQA0J0 a
3957 8
b
3959
0Z0Z0Zks opM0Z0op 0Z0Z0Z0Z Z0m0o0Z0 0Z0ZPZ0Z Z0Z0ZPZb POPJQaqO S0ANZ0Z0 a
0ZQZ0Z0Z o0o0ZkZ0 0Zpa0m0Z Z0Z0ZPo0 0Z0OpZ0l Z0O0ZpS0 PO0Z0O0O Z0Z0Z0SK a
3956 8
Perpetual check
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZrZkZ opZ0Zpap 0Z0ZqZpZ Z0ZnZ0Z0 0Z0S0O0Z Z0M0A0ZP POPZQZPO Z0J0S0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3961 8 7 6 5 4 3 2 1
3964
0ZQaqZkZ Z0Z0Z0o0 0o0Z0ZNo Z0Z0o0ZP 0Z0sPZ0Z Z0Z0Z0Z0 0Z0o0ZPJ Z0ZRZ0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3966
rZ0Z0Z0Z Z0m0a0Z0 0ZpZpl0j ZpOpZ0Zr pZ0O0OQZ O0ZBO0O0 0O0Z0A0Z Z0ZRZ0J0 a
c
0Zks0ZrZ o0o0ZpZp 0ZpZ0Z0Z Z0mbS0Z0 0Z0l0Z0Z Z0M0Z0Z0 POPZ0OPO S0Z0LBJ0 a
3963 8
b
3965
rZbZkZ0s ZRZ0Z0o0 pZnaNm0Z Z0Zpo0o0 qZ0Z0Z0Z Z0O0A0Z0 0Z0Z0OPO ZBZQZRJ0 a
0Z0l0skZ Z0ZPZ0Zp pZ0S0ZrZ ZpZ0ZNZ0 0Z0Z0L0Z Z0Z0ZPZ0 0ZpZPJ0O Z0Z0Z0Z0 a
3962 8
Perpetual check
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZqs0ZkZ opo0opZp 0m0Z0a0A Z0ZPZpZ0 0Z0Z0Z0Z Z0Z0L0Z0 PO0ZNO0O Z0ZRJ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3967 8 7 6 5 4 3 2 1
3970
0Z0Z0s0Z Z0l0Z0ok 0Z0ZQZ0o Z0S0Z0Z0 PO0Z0ZnZ M0m0Z0Z0 0Z0Z0ZPO Z0Z0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3972
rZ0Z0j0s o0S0opZ0 0l0ZBapZ Z0Z0Z0Z0 0Z0ZPL0O Z0Z0Z0Z0 PZ0Z0O0O Z0A0Z0J0 a
c
0ZrZ0akZ opZ0ZpZ0 0Z0ZpOpZ Z0ZpO0L0 bZ0M0ZPZ Z0ZRZ0Z0 Pl0ZBZ0Z Z0s0ZRJ0 a
3969 8
b
3971
rZ0Z0Z0Z Z0Z0Zpj0 pS0Z0ZpZ O0o0Z0Zp qZPaPL0Z Z0Z0M0O0 0Z0Z0ZKO Z0Z0Z0Z0 a
ra0Z0Z0j ZbZNZ0o0 pZ0Z0m0o mpZ0Z0Z0 0Z0Z0Z0Z O0OQZ0Oq BO0A0O0O Z0Z0S0J0 a
3968 8
Perpetual check
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0skZ o0l0Zpo0 BonZbZ0o Z0Opa0Z0 0Z0Z0O0Z ONZ0O0M0 0OQZ0ZPO Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3973 8 7 6 5 4 3 2 1
3976
0Z0Z0skZ ZrO0Z0op pZ0Z0m0Z Z0ZPo0Z0 0O0ZPl0Z Z0L0Z0ZP PZ0Z0ZPZ S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3978
0Z0Z0srj Z0ZRZQap 0Z0Z0ZpZ Z0Z0Z0O0 0Z0Z0Z0Z ZPO0Z0Z0 qZ0Z0ZPZ Z0Z0ZRZK a
c
0Z0s0ZkZ Zpl0Z0Zp 0S0Z0ZpZ Z0O0Zpm0 PO0Z0M0Z Z0Z0ZPO0 0Z0S0LKO Z0Z0s0Z0 a
3975 8
b
3977
0ZRZ0Z0Z o0Z0l0jp 0Z0Z0ZpZ Z0ZpZ0Z0 bZ0O0ZpZ OrZ0Z0M0 0Z0Z0L0Z Z0ZKZ0ZR a
0Z0srZ0j Z0Z0m0ap 0ZqZ0ZpZ o0O0ZpZ0 0OBZNO0L O0Z0o0Z0 0Z0Z0ZPO S0A0Z0J0 a
3974 8
Perpetual check
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZbZrZkZ Z0l0Z0Zp po0Z0o0Z Z0ZpZ0oQ 0Z0Z0a0Z ZPZBs0O0 PAPZ0Z0O Z0ZKZRZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3979 8 7 6 5 4 3 2 1
3982
0ZqZ0Znj Z0Z0ZpZ0 0Z0ZpMpo o0Z0O0Z0 0o0Z0ZPL Z0ZBZ0ZR PO0J0ObO Z0s0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3984
rZbZ0skZ opZ0opap 0Z0l0mpZ Z0A0ZPZ0 0m0Z0ZPZ ZNM0Z0Z0 POPZBZ0O S0ZQJ0ZR a
c
0Z0Z0skZ o0lbZpZp 0Z0o0mpL Z0Z0Z0OP 0oroPZ0Z Z0Z0ZPZ0 POPZNZ0Z ZKZRZ0ZR a
3981 8
b
3983
0Z0Z0Z0j o0o0l0Zp 0a0oRZnL Z0Z0Z0oN 0Z0ZPZ0Z Z0o0Z0ZP Ps0Z0ZPJ Z0Z0Z0Z0 a
0Zks0ZrZ oplbmpZQ 0ZnZpZ0Z OBZpO0A0 0Z0Z0Z0Z O0o0ZNZ0 0ZPZ0OPO S0Z0ZRJ0 a
3980 8
Perpetual check
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0srZkZ Z0o0ZpZp 0Z0Z0ZpZ ZQZ0Z0Z0 0ZPZpO0Z ZPZ0Z0Z0 PZ0ZqZPO Z0Z0S0ZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3985 8 7 6 5 4 3 2 1
3988
0Z0l0Z0Z ZpZ0ZQak 0Z0o0ZpZ ZPZ0o0Zp 0ZNZPZ0Z Z0Z0Z0O0 0Z0Z0ZKO Z0Z0Z0Z0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3990
0L0Z0Z0Z Z0Z0Zrj0 0oPo0Zpo ZPZPoBZ0 0Z0m0a0l Z0Z0Z0M0 0Z0Z0OPO Z0Z0S0J0 a
c
0ZrZ0ZkZ ZqZ0Z0s0 pZ0o0oRL Z0Z0Z0ZP 0o0A0Z0Z ZPZ0Z0Z0 PZPZ0Z0Z ZKZ0Z0Z0 a
3987 8
b
3989
rZ0l0s0j Zpo0Z0ap 0Z0o0Z0Z ZPOPo0Z0 0ZNZPZbm Z0M0A0O0 0ZQZBm0Z ZRZ0ZRJ0 a
0Zrl0skZ obZ0ZpZ0 0o0Z0m0o ZPZpm0o0 0ZPM0Z0A OQZ0Z0Z0 0Z0Z0OPO ZBS0ZRJ0 a
3986 8
Perpetual check
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0j0s0ZrZ ZpZ0ZpZ0 pZ0ZpZ0Z Z0ZPM0Zq 0Z0Z0Z0o Z0Z0L0O0 PO0Z0O0O Z0S0a0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3991 8 7 6 5 4 3 2 1
3994
0j0s0ZrZ ZpZ0ZpZ0 pZ0ZpZ0Z Z0ZPM0Zq 0Z0Z0Z0o Z0Z0L0O0 PO0Z0O0O Z0S0Z0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
3996
rZ0Z0Z0j opZbZ0Z0 0ZpZ0ZQA Z0Opl0Z0 0Z0a0Z0Z Z0Z0Z0Z0 PO0Z0ZPO Z0Z0ZRZK a
c
qZrZ0skZ Z0Z0apo0 0m0ZpZ0Z ZNm0O0ZQ pA0MbZ0Z Z0Z0Z0S0 0ZPZ0ZPO Z0Z0ZRZK a
3993 8
b
3995
0Z0Z0s0Z ops0o0j0 0Z0ZRZpZ Z0lPZ0o0 0ZbZ0Z0L Z0Z0Z0Z0 PZ0Z0OBZ Z0Z0S0J0 a
0Z0ZrZkZ Z0S0Zpa0 pZ0O0ZpZ ZpZ0Z0Z0 0Z0O0o0o O0Z0ZPmP 0O0ZNJPZ Z0ZBZ0Z0 a
3992 8
Perpetual check
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Zqsra0m Z0Z0Z0Zk 0Z0o0Z0A Z0oPopLP pZPZRZpZ Z0Z0Z0Z0 PZ0Z0OPM Z0S0Z0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
3997 8 7 6 5 4 3 2 1
4000
rZqZnsnj o0ZbZ0Zp 0Z0o0apZ MNoPopZ0 0ZPZPZ0Z Z0Z0ZBZ0 PZ0A0OPO ZRZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4002
rZbl0s0j ZpZ0Z0ap 0Z0Z0ZpZ Z0M0o0Zn 0ONmPo0Z Z0Z0ZPZ0 0A0ZBZPO ZRZQZRJ0 a
c
rZ0ZrZkZ opo0Zpap nZ0o0lpZ ZNZPo0Zb 0OPZPm0Z Z0Z0ANZP PZQZ0OPZ ZRSBZ0J0 a
3999 8
b
4001
0ZbZ0Z0j Z0M0Z0Zp 0ZNo0l0Z Z0oPZpZ0 0ZPZrS0Z Z0Z0m0ZP 0Z0Z0LPZ Z0Z0Z0J0 a
rZ0lnZ0j Z0ZbZ0a0 0o0o0ZrZ ZNZPo0op pO0ZPo0Z S0Z0ZPZP 0ZQZBAPZ Z0Z0ZRJ0 a
3998 8
Profilax
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrZkZ opZ0lpan nZpo0ZpZ Z0Z0Z0Op 0ZPMPA0Z Z0M0ZPZ0 PO0LBZ0O Z0ZRZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4003 8 7 6 5 4 3 2 1
4006
rmblrZkZ ZpZ0Zpap 0Z0o0mpZ o0o0Z0Z0 NZPZPZ0Z ZNZ0ZPZ0 PO0ZBZPO S0AQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4008
0s0l0skZ Z0mbo0ap po0o0ZpZ Z0oPZ0Zn PZPZ0Z0Z Z0M0ANZ0 0O0LBOPO S0Z0S0J0 a
c
rZ0Z0Z0j Zpobl0Zp 0Z0o0Z0Z o0ZPo0ZP 0ZPZNs0Z Z0Z0L0Z0 POKZ0ORZ Z0Z0Z0S0 a
4005 8
b
4007
0ZrZ0ZkZ Z0Z0Zpap pZ0S0Z0Z Z0o0Z0Zp 0ZPZQO0A ZqZ0Z0ZP 0Z0Z0ZPZ Z0Z0Z0J0 a
rZrZ0ZkZ oponlpa0 0Z0o0mpZ Z0ZPo0Mp 0ZPZPZ0O Z0M0APZ0 PO0ZQZPZ ZKZRZ0ZR a
4004 8
Profilax
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0s0j opobZ0ap nZ0o0Z0Z Z0ZPopZ0 0ZPZ0mPZ Z0M0ANZP POQZ0O0Z Z0J0SBS0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4009 8 7 6 5 4 3 2 1
4012
0Z0Z0j0Z Z0s0Zpap pZ0orZ0Z Z0OQo0ZP 0Z0ZPo0Z Z0ZRZ0Z0 Bl0Z0O0Z Z0Z0ZKZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4014
0ZrZ0Zks ZbZ0Zpo0 pZ0lpZ0Z L0Zpm0Z0 0Z0MPZ0Z Z0ZBZPZ0 POPZ0Z0Z ZKZRZ0S0 a
c
0Zks0Z0s opl0Zpo0 0Z0ZpZ0Z ZPa0Z0Zp 0ZBZ0ZnZ Z0O0Z0O0 0O0ZQO0O S0A0ZRJ0 a
4011 8
b
4013
0Z0s0s0j Z0Z0Z0op 0Z0Z0Z0Z oPZpo0Zq PZ0ZNa0Z Z0ZRZ0ZP QZ0Z0OPZ Z0ZRZ0J0 a
0Zks0Z0Z Zbl0ZpM0 pZ0spZ0o Z0mnZ0Z0 0o0M0ZPO ZBZ0ZPZ0 POPL0Z0Z Z0JRZ0ZR a
4010 8
Profilax
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0s0ZkZ opZ0Z0o0 0ZnZ0Z0o Z0Zqm0Z0 0Z0ZRZ0Z ZPLpZPZ0 0O0Z0Z0O Z0Z0S0MK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4015 8 7 6 5 4 3 2 1
4018
rZbl0Z0s opo0Zpj0 0ZnZpZ0Z Z0Z0Z0ZR 0Z0Z0Z0Z Z0ZBZNZ0 POPZ0JPZ S0Z0Z0ZQ a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4020
rZ0ZnZkZ Z0ZqZ0ap 0ZnobZpZ ZNZ0o0Z0 0oPZPZ0Z ZNZQA0Z0 0O0ZBZPO Z0Z0ZRJ0 a
c
0Z0l0s0j Z0Z0Z0Zp 0Zbo0ZpZ Z0ZNo0a0 0Z0ZPZ0Z Z0O0ZpO0 QONZ0O0O Z0Z0ZRJ0 a
4017 8
b
4019
rZbZ0skZ Z0ZnZpop pZ0ZpZ0Z ZplNO0ZQ 0Z0S0S0Z ZBZ0Z0Z0 POPZ0ZPO Z0Z0Z0J0 a
0ZrZ0skZ ZbZ0lpo0 0o0o0Z0o o0m0o0Zn 0ZPZPZ0Z O0MBZPZ0 0OQA0ZPO S0Z0ZRJ0 a
4016 8
Profilax
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0Z0skZ Z0Z0ZpZp 0lpZ0LpZ o0Z0Z0Z0 0ZBZ0Z0Z ZPZ0ZPZ0 bZPZ0ZPO Z0JRZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4021 8 7 6 5 4 3 2 1
4024
0Z0l0Z0j o0ZrZ0Zp 0ZpAba0L ZrZ0opZ0 0ZNZ0m0O Z0Z0ZPZB POPS0Z0Z Z0J0Z0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4026
0Z0Z0s0j opl0Z0Zp 0Z0o0ZnZ Z0Z0Z0Z0 0ZPSNZ0Z Z0Z0ZrZP PO0L0O0Z Z0J0Z0S0 a
c
rZ0ZkZ0s o0Zpm0op bl0LpZ0Z Z0o0OpZ0 0ZPZ0O0Z ZPZ0ZKZ0 PZ0Z0MPO S0Z0ZBZR a
4023 8
b
4025
0sbl0s0j Z0Z0Z0Zp po0o0Z0Z Z0ZPo0on 0Z0ZPo0a Z0M0ZPZ0 PO0LBZPO ZKS0ZRA0 a
0l0Z0Z0j Z0o0Zpob 0o0o0m0o ZPZPoBm0 0APZ0Z0M L0Z0ZPO0 0Z0ZPZ0O Z0Z0Z0J0 a
4022 8
Profilax
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0s0ZkZ obZnlpo0 0o0opm0o Z0o0Z0Z0 0ZPO0Z0A O0ZBONZ0 0OQZ0OPO Z0ZRZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4027 8 7 6 5 4 3 2 1
4030
0sbZ0lkZ Zpm0spap pMpZ0ZpZ M0O0m0Z0 PZ0ZPZ0Z Z0Z0APZ0 0Z0LBZPO Z0ZRZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4032
0Z0lrakZ ZpZ0Zpop bZ0Z0Z0Z Z0ZNZ0Z0 0Z0L0Z0Z Z0Z0Z0O0 POrZ0OBO Z0S0S0J0 a
c
rZ0l0skZ ZpZnopap 0ZnobZpZ o0Z0Z0Z0 PZ0ZPO0Z ZNM0A0Z0 0OPZBZPO S0ZQZRJ0 a
4029 8
b
4031
rZ0s0ZkZ opl0Zpop 0Z0mpm0Z Z0apZ0Z0 0Z0M0O0Z OPZ0ZPO0 0APZ0ZKO ZRZQSBZ0 a
0Z0ZrZkZ opZqZpo0 0Z0anZ0Z ZPZ0Z0Z0 PZ0orZ0Z Z0ZNZNO0 0ZRZPO0Z Z0ZQS0J0 a
4028 8
Profilax
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZrZ0ZkZ ZpZ0o0ap 0onZ0opZ Z0ZpZ0Z0 0Z0ObA0Z O0Z0ONZ0 0O0ZBOPO Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4033 8 7 6 5 4 3 2 1
4036
rZqZkZ0s obZ0Zpo0 0o0Z0Z0Z Z0mpZ0M0 0Z0Z0Z0Z O0Z0Z0Z0 0OQZ0OPO Z0S0JBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4038
0sbZ0skZ ZpZnlpap pZ0o0mpZ Z0oPZ0Z0 PZ0ZPZ0Z Z0M0ZNO0 0O0Z0OBO S0AQS0J0 a
c
0Z0a0ZkZ Z0oqZpo0 0ZnZnZpZ ZpZpO0Z0 rO0Z0Z0Z ZNO0ANZ0 0Z0S0OPO ZQZ0Z0J0 a
4035 8
b
4037
rZ0ZrZkZ o0ZnZpo0 pZ0o0ZbZ O0oPZ0Zp 0ZNZ0l0Z ZPZ0M0Z0 0ZPL0OPO Z0Z0SRJ0 a
0s0lrZkZ mpZnZpap pZ0o0ZpZ O0oPZ0Z0 0ZQZ0O0Z S0M0Z0OP 0O0ZPZBZ Z0A0ZRJ0 a
4034 8
Profilax
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0skZ opZqapop 0ZnZbZ0Z ZQo0O0Z0 0ZPo0A0Z Z0ZPZNO0 PZ0Z0OBO S0Z0S0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4039 8 7 6 5 4 3 2 1
4042
0ZrZrlkZ ZpZnZ0op pZ0apmbZ Z0o0ZpZ0 0ZPO0Z0Z Z0MNOPO0 PA0Z0LBO Z0ZRS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4044
rZbl0skZ o0Znapmp 0o0o0ZpA Z0oPo0Z0 0OPZPZ0Z O0M0ZNO0 0Z0LBO0O S0Z0ZRJ0 a
c
rZ0Z0skZ o0ZnZbap 0Z0Z0lpZ ZNOpo0Z0 0O0Zno0Z ONZQZ0O0 0Z0Z0OBO ZRA0S0J0 a
4041 8
b
4043
0srZ0ZkZ ZpZ0ZpZp 0Z0ZplpZ o0m0Z0Z0 0ZPZ0Z0O ZPZ0L0O0 PZ0S0OBZ Z0ZRZ0J0 a
0s0Z0ZkZ ZrZnZpop 0Z0l0Z0Z Zpo0o0Z0 0Z0Z0Z0Z ZQZPA0O0 0O0ZPO0O S0Z0ZRJ0 a
4040 8
Profilax
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ opZ0lpap 0Zpo0ZpZ Z0m0m0Z0 0ZPAPZ0Z Z0M0ZNZ0 PO0LBOPO Z0ZRS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4045 8 7 6 5 4 3 2 1
4048
0Zrl0skZ ZpZ0Zpa0 0Zpo0Z0Z o0ZPo0op 0ZPZPm0Z Z0MnZPA0 POQM0ZPO S0Z0ZRZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4050
rZbZ0skZ opZnZqop 0Z0o0Z0Z ZBoPZ0S0 0Z0ZpO0Z ZQZ0Z0ZN PZ0A0J0Z Z0Z0Z0ZR a
c
0ZbskZ0Z ZpZ0apZr pZ0ZpZpo Z0lnM0Z0 PZ0M0Z0Z Z0ZRZQA0 0OPZ0OPO Z0ZRZ0J0 a
4047 8
b
4049
0Z0s0s0Z opZnlpZk 0ZpZbmpo Z0Z0Z0Z0 0Z0ZPZ0O Z0L0ZNM0 POBZ0OPZ Z0S0S0J0 a
rZ0lkZ0s opZ0apop 0mnZpZ0Z Z0ZpObZ0 0Z0O0Z0Z Z0M0Z0Z0 PO0ZBOPO S0AQMRJ0 a
4046 8
Profilax
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0Z0aks Z0Z0Zqo0 pZpo0onZ Z0Z0Z0Zp 0ZpLPObO Z0M0ZNZ0 POPZ0ZPZ ZKA0S0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4051 8 7 6 5 4 3 2 1
4054
rZrlnZkZ opZbZpap 0Z0o0ZpZ ZPZPo0Zn PZ0ZPZ0Z Z0MNZ0O0 0Z0A0OBO S0ZQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4056
rZblrmkZ ZpZ0Zpap pZpZpZpZ Z0OpZ0Z0 0Z0O0O0Z Z0MBZNZP POQZ0OPZ Z0S0S0J0 a
c
rZbl0ZkZ Z0o0ZrZp pZPo0m0Z ZpZPo0o0 0O0ZPo0Z Z0M0ZPZ0 PJ0ZBLPO Z0ZRZ0ZR a
4053 8
b
4055
0Znl0skZ opZrZpap 0ZpZpZpZ Z0OpZ0Zn PZ0O0Z0Z ZPZBO0ZP 0AQZ0OPZ S0ZRZNJ0 a
rZbZ0skZ Zpo0Z0an nZ0o0Z0Z o0ZPo0lp 0ZPZPopZ OPMNZPZ0 0JBL0APO Z0ZRS0Z0 a
4052 8
Space advantage
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbanZkZ ZpZ0l0Z0 0Z0o0m0s ONZPo0o0 0ZNZPoPZ Z0ZQZBZP 0Z0Z0AKZ S0Z0Z0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4057 8 7 6 5 4 3 2 1
4060
rZblrZkZ opZ0mpo0 0Z0o0m0o Z0oPZ0Z0 0ZPZ0O0Z O0OBZ0M0 0Z0Z0ZPO S0AQZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4062
0Z0srZkZ obZnZpop 0oqopa0Z Z0o0Z0Z0 0ZPOPZ0Z ZPZ0ZNO0 PA0S0OBO Z0ZQS0J0 a
c
0s0l0skZ ZnZbZpZp 0Z0o0Zpa o0oPo0Zn 0oPZPZ0Z ZPZ0M0O0 PA0MQOBO S0Z0ZRJ0 a
4059 8
b
4061
0Z0ZrakZ Z0l0spop 0opo0Z0Z o0m0Z0Z0 0ZPZPZ0Z ZPA0S0OP PZ0L0OBJ Z0Z0S0Z0 a
0sbZ0skZ ZpZ0lpop pZpapm0Z Z0M0M0Z0 0Z0O0O0Z Z0Z0O0Z0 PO0Z0OBO S0Z0ZRJ0 a
4058 8
Space advantage
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0Zns0Z ZpZbZpak pZ0o0Zpo l0oPo0Z0 0ZPZPZPO Z0MBAPM0 PO0L0Z0Z S0Z0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4063 8 7 6 5 4 3 2 1
4066
rZnl0s0Z ZponZ0ak pZ0o0Zpo Z0OPo0Z0 QO0ZPo0Z Z0M0ZPZ0 PZ0M0APO Z0S0ZRJ0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4068
rZbZrZkZ ZpZnlpmp 0Z0o0ZpA o0oPo0Z0 0ZPZPZ0Z O0M0Z0ZP 0O0LBOPZ S0Z0ZRJ0 a
c
rs0mnakZ Z0lbZ0op pZ0o0o0Z ZpoPoNZ0 0ZPZPZ0O ZPZ0Z0Z0 PZBZ0OPM S0AQS0J0 a
4065 8
b
4067
rl0s0mkZ ZbZ0Zpop 0o0o0m0Z Z0oPo0Z0 0ZPZPZ0Z ZPA0Z0OB 0L0M0O0O Z0ZRS0J0 a
0Z0Z0ZkZ Z0ZbopZp pl0o0mpZ m0oPZ0Z0 0ZPZPO0Z O0Z0M0OP 0ZQM0ZBJ Z0Z0Z0Z0 a
4064 8
Space advantage
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ opZpapop qZ0Zpm0Z Z0oPZ0Z0 0Z0ZPZ0Z Z0M0ZNZ0 POPZ0OPO S0AQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4069 8 7 6 5 4 3 2 1
4072
0sbs0Z0Z o0mpjpop 0o0MpZ0Z Z0O0Z0Z0 0ZPO0Z0Z Z0Z0Z0O0 PZ0ZKOBO ZRZ0Z0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4074
0sqZ0skZ Z0mbapo0 0Z0o0m0o o0oPZPZ0 0oPZ0A0Z ZPZBZNZP PZQZNZPZ S0Z0ZRJ0 a
c
nj0Z0Zrs oplba0o0 0ZnZpo0o Z0ZpO0Z0 0Z0O0O0Z OPZBANZ0 0Z0LNZPO S0S0Z0J0 a
4071 8
b
4073
0ZrZnskZ oblnZpZp 0o0Z0Z0Z Z0o0oPZ0 0ZPo0Z0O ZPZPa0O0 PA0ZQZBJ SNZ0MRZ0 a
0ZnZnZkZ ZrZbZ0ap pZ0o0opZ Z0oPoPZ0 PZPZPZPZ Z0MNA0Z0 RZ0ZBZ0O Z0Z0Z0J0 a
4070 8
Space advantage
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0l0skZ Zpa0Zpop pZpZpm0Z O0M0Z0Z0 0O0ZPZ0Z ZQZ0Z0O0 0Z0O0OBO Z0S0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4075 8 7 6 5 4 3 2 1
4078
rZ0ZrZkZ Z0lnZ0op bZpZpa0Z o0OpZ0m0 0o0OPM0Z ZPZ0Z0O0 PAQM0ZBO S0Z0S0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4080
0Z0Z0Z0j o0mnZqap 0o0o0ZpZ Z0oPZpZ0 0ZPZ0O0Z ZPMBZQOP PZ0A0ZKZ Z0Z0Z0Z0 a
c
0Z0ZkZ0Z orZqapo0 0ZpZpZ0s Z0ZpO0Zp QOPZ0Z0Z O0Z0ZNZ0 0Z0Z0OPO S0Z0ZRJ0 a
4077 8
b
4079
0s0ZnskZ ZpoqZpZp pZ0apZpZ Z0Z0Z0O0 0ZPOBZ0Z ZQZ0ZPA0 PO0Z0Z0O ZKZRZ0ZR a
bs0lrZkZ Z0ZnZpa0 pZpZ0mpo OpZ0o0Z0 0OPZPZ0Z Z0Z0SNZP 0ZBMQOPZ ARZ0Z0J0 a
4076 8
Space advantage
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZrZkZ ZpZ0opap 0lpZ0mpZ o0mpZ0Z0 PZ0ZPZ0Z ZPZPZNO0 0APM0OBO S0ZQS0J0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4081 8 7 6 5 4 3 2 1
4084
0sbZnsnj o0Z0Zqap 0o0o0ZpZ O0oPopO0 0OPZPZ0Z Z0MNA0Z0 0Z0ZBO0O S0ZQZ0SK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4086
bZ0ZqskZ Z0mnZpap 0ZpZ0ZpZ ZpO0o0Z0 0O0ZPZ0Z Z0M0ANZP 0ZQZBOPZ S0Z0Z0J0 a
c
0Znl0s0Z Z0Zbs0ak 0o0o0opZ o0oPo0Zp PZPZPZ0Z S0Z0Z0ZP 0OBANOPZ Z0L0ZRJ0 a
4083 8
b
4085
0sbZ0s0j o0Z0l0Zn no0o0o0Z ZNoPoPop 0OPZPZ0Z ORZ0L0ZP 0ZBM0ZPZ Z0Z0S0J0 a
rZnl0skZ ZpZbZ0ap pZ0o0ZpZ Z0oPo0Z0 PZPZPZPZ Z0M0APZ0 0O0M0Z0Z S0ZQJ0ZR a
4082 8
Space advantage
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0l0skZ opm0Z0ap 0Z0o0Zpm Z0oPZpZ0 0ZPZ0OPZ Z0M0Z0ZP PO0ABZKZ S0ZQZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4087 8 7 6 5 4 3 2 1
4090
0s0Z0skZ Z0lnapop pZbo0Z0Z Z0o0o0Z0 0ZPZPO0Z ZPM0Z0O0 PZ0Z0ZBO S0AQS0J0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4092
rZ0ZkZ0s opZqo0ap 0mpZ0ZpZ Z0ZpOpZn 0Z0O0O0A Z0ZBZRZP POPLNZPZ S0Z0Z0J0 a
c
rZ0Z0skZ ZbZnZ0o0 0ZpZpZ0a ZpOpZ0Z0 pO0OPZqZ O0Z0Z0O0 0AQZ0ZBZ S0Z0SNJ0 a
4089 8
b
4091
rm0l0Z0j Z0Znarop 0ZpZpZ0Z Z0opOpZ0 0O0O0O0Z Z0ZBA0Z0 0Z0LNO0O ZRS0Z0ZK a
0l0a0skZ Z0ZnZpmp 0ZpZpZpZ ZrOpO0Z0 No0O0ZPZ ZPZNZPZ0 0AQZ0Z0O Z0Z0SRJ0 a
4088 8
Space advantage
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0s0ZkZ0s opoqZpop 0ZnZpZ0Z Z0O0OnM0 0Z0OQZ0Z Z0O0Z0Z0 PZ0Z0ZPO ZRA0ZRJ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4093 8 7 6 5 4 3 2 1
4096
rZbZqs0j ZpZnZpap pZ0o0mpZ Z0oPo0A0 PZPZPZPZ Z0M0ZPM0 0O0L0Z0O S0Z0JBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4098
0s0ZkZ0s Z0o0Zpa0 pm0o0Z0o Z0oPo0oP qZ0ZPZPZ O0Z0ZQS0 0OPA0O0Z Z0JNZ0ZR a
c
rl0Z0s0Z ZpZ0opjp nObo0ZpZ O0Z0Z0Z0 0Z0ZPO0Z Z0M0L0Z0 0Z0ZBZPO S0Z0ZRJ0 a
4095 8
b
4097
rZ0lrZkZ Zpo0Zpop 0ZnobZ0a o0mNZ0Z0 0ZPZPO0Z ZPZ0Z0Z0 PABLNZPO S0Z0ZRJ0 a
rZ0l0skZ opZ0Z0ap 0Z0o0opZ Z0ZNo0Z0 0ZPZPObZ Z0Z0A0Z0 PO0L0ZPO S0Z0ZRJ0 a
4094 8
Space advantage
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0l0Z0s0Z Z0Zro0j0 0obo0opZ o0m0Z0Zp 0ZPLPO0Z Z0M0ZBZ0 PO0S0ZPO Z0Z0ZRZK a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4099 8 7 6 5 4 3 2 1
4102
rZbZ0skZ opZpZ0Zp 0Z0Zpm0Z Z0Z0ZpZ0 0ZPS0O0O Z0M0Z0Z0 PO0ZBZPZ Z0J0Z0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4104
0Z0ZrskZ o0ZqZ0Zp 0Z0Zbo0Z ZpZnZpo0 0ZpO0Z0Z Z0O0ZQOP POBM0O0Z S0Z0S0J0 a
c
rZbl0s0Z ZponZpak 0Z0o0mpo o0ZPZ0Z0 0O0Z0Z0Z O0M0ANZP 0ZPZBOPZ ZRZQS0J0 a
4101 8
b
4103
rZ0Z0skZ ZqZ0opZp 0obo0ZpZ o0m0Z0Z0 0ZPLPO0Z ZPM0Z0Z0 PZ0ZBZPO Z0SRZ0J0 a
rm0l0skZ obZ0a0op 0o0o0m0Z Z0oPZpZ0 0ZPZpO0Z ZNM0O0ZP PO0ZBZPZ S0AQZRJ0 a
4100 8
Space advantage
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0Z0ZqZkZ Z0ZnsrZp no0o0opA o0oPo0Z0 PZPaPO0Z ZPZ0ZROP 0Z0LNZKZ ZBZ0ZRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4105 8 7 6 5 4 3 2 1
4108
rZbZ0j0s opL0apo0 0Z0Zpmqo ZBZpO0A0 0Z0Z0Z0Z Z0M0ZPZ0 POPZ0O0O S0Z0J0S0 a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4110
0Zks0a0s L0o0Zpop 0ZpZqZ0Z Z0O0m0Z0 0Z0ZNZ0Z Z0Z0ZPZ0 PO0Z0OKO S0A0ZRZ0 a
c
0Zks0Zns opZnZpop 0ZpZpZ0Z l0Z0Z0Z0 0a0O0A0Z O0M0ZQZP 0OPZBOPZ S0Z0J0ZR a
4107 8
b
4109
rZ0Z0a0L opl0Zko0 0Z0ZpopZ ZbZpm0Z0 0Z0Z0Z0Z ZPZ0APZ0 0O0Z0JPO SBZ0Z0ZR a
rZ0ZkZ0s oQo0Zpop 0ZnZ0Z0Z Z0ZnZ0Z0 0Z0OqZbZ O0Z0ANZ0 0ZPZBOPO S0Z0J0ZR a
4106 8
Double rook sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZ0skZ opZ0opap 0Zno0mpZ l0O0Z0Z0 0Z0APO0Z Z0M0ZNZ0 POPZ0ZPO S0ZQJBZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4111 8 7 6 5 4 3 2 1
4114
rm0Z0Z0L opZ0okZp 0Z0Z0Z0Z Z0opZ0Z0 0Z0O0Z0Z Z0Z0Z0Z0 PZPZKOPO l0Z0Z0MR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4116
rZbZ0skZ o0ZpZpAp 0o0Z0ZpZ Z0Z0Z0Z0 0ZPZ0Z0Z Z0Z0Z0Z0 PO0LBOqO S0Z0J0ZR a
c
rZ0Zka0s ZblpZpop pZ0Zpm0Z ZpZ0O0Z0 0Z0Z0ZnZ ZBM0ZNZ0 POPAqOPO S0Z0ZRJ0 a
4113 8
b
4115
0s0ZkZ0s oqZ0opLp 0Z0o0ZpZ Z0oNZ0Z0 0Z0ZnO0Z Z0Z0Z0Z0 POPAKZPO ZRZ0Z0ZR a
rmbZ0Z0L opZpjpZp 0Z0ZpZ0Z Z0Z0O0Z0 0Z0lnZ0Z Z0Z0Z0Z0 PZPZKOPO S0A0ZBZR a
4112 8
Double rook sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0ZkZ0s Z0Z0Zpop pZ0ZpZ0Z MpZqZ0Z0 0Z0Z0aBZ Z0L0Z0Z0 POPZ0ZPO ZKZRZ0Z0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4117 8 7 6 5 4 3 2 1
4120
rmbZkZ0s Z0l0Zpop pZ0Zpm0Z ZpZ0O0A0 0a0M0Z0Z Z0M0Z0Z0 POPZQZPO S0Z0JBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4122
rmbZkZ0s opZ0ZpLp 0Z0ZpZ0Z lPZpZ0Z0 0Z0ZnZ0Z O0M0Z0Z0 0APZPaPO S0ZKZBMR a
c
rZ0Zka0s opZnopop 0Z0Z0Z0Z ABo0Z0Z0 0Z0l0O0Z Z0Z0Z0Z0 PZPZ0ZPO S0ZQJ0ZR a
4119 8
b
4121
rZblkZns opZ0Z0op 0ZnZpo0Z Z0a0Z0Z0 QZ0oPA0Z Z0M0ZNZ0 POPZ0OPO Z0JRZBZR a
rZbZkZns o0o0lpZp 0Zpa0Z0Z Z0Z0Z0Z0 0Z0O0ZpZ Z0ZQA0Z0 POPZPZPO SNZ0JBZR a
4118 8
Double rook sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZkZ0s Zpo0ZpLp pZnZpZ0Z O0ZqZ0Z0 0ZpZ0OnZ Z0Z0Z0O0 0O0OPZ0O SNA0JRZ0 a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4123 8 7 6 5 4 3 2 1
4126
rmbZkZ0s opZ0Zpop 0Z0ZpZ0Z Z0Z0Z0Z0 0aPl0Z0Z Z0Z0Z0O0 PZ0A0O0O S0ZQJBMR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4128
0s0lkZ0s opo0Zpop 0Zno0M0Z Z0a0o0Z0 0ZPZ0ZbZ ZQZ0O0O0 PO0ONOBO S0A0J0ZR a
c
0ZrZ0j0s oqZ0Zpop 0Z0Z0Z0Z Z0Z0Z0Z0 0Z0L0Z0Z Z0mPZ0O0 PO0APZ0O ZRZ0J0ZR a
4125 8
b
4127
rZ0Zka0s Z0obZpop pZpZ0Z0Z Z0Z0M0l0 QZ0ZPZ0Z Z0O0Z0Z0 PZ0O0OPO S0A0J0ZR a
rm0j0arZ opZ0oQo0 0Z0ZpZ0o Z0Z0M0Z0 0ZPZPZ0Z Z0M0Z0Z0 Pl0O0OPO S0m0ZKZR a
4124 8
Double rook sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbZka0s ZpZ0o0Zp pZ0ZPmpZ Z0o0Z0Z0 0ZBZ0Z0Z Z0M0ZPZ0 PlPZQZ0O S0Z0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4129 8 7 6 5 4 3 2 1
4132
rZbZka0s opZpZpZ0 nZ0O0Z0Z ZNo0ZpZp 0Z0ZpO0Z Z0O0O0ZN PO0LBZqO S0Z0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4134
rm0Z0Z0L opo0jpop 0Z0Z0Z0Z Z0apO0Z0 0ZPZ0Z0Z Z0Z0Z0Z0 POKAqZPS SNZ0Z0Z0 a
c
rmbZkZ0s opZpo0ap 0Z0Z0ZpZ Z0onZ0A0 0Z0Z0Z0Z Z0MBZNZ0 PlPL0ZPO ZRZ0J0ZR a
4131 8
b
4133
rm0Z0a0s obZ0jpo0 0o0Zpm0o ZBoqO0ZQ 0Z0Z0Z0A Z0Z0O0Z0 POPZ0OPO SNZ0J0ZR a
rZbZ0s0Z Zpl0Zpok pZ0Z0Z0Z Z0o0ZnZ0 0ZPZQZPZ ZPM0O0Z0 PA0Z0OKa S0ZRZ0Z0 a
4130 8
Double rook sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rmbZka0s opopZ0op 0Z0ZpZqZ Z0Z0Z0Z0 0Z0ONZ0Z Z0Z0Z0Z0 POPZ0OPO S0ZQJBMR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4135 8 7 6 5 4 3 2 1
4138
rZbZ0j0s o0Z0Zpo0 0onZpZ0o l0opO0Z0 0Z0O0L0O Z0OBZNZ0 PZPJ0OPZ S0Z0Z0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4140
rmbj0Z0s opZnZpZp 0Z0ZpZpl ZNopO0Z0 0Z0O0ZQZ Z0ZBZ0ZN POPZ0OPZ S0Z0J0ZR a
c
rZbZ0jns opL0Z0o0 0ZnZpl0o ZPZpZ0Z0 0Z0Z0Z0Z Z0ZpZNZ0 PZPA0OPO S0Z0JBZR a
4137 8
b
4139
rmbZkZ0s opZ0Zpop 0Z0ZpA0Z Z0Z0Z0Z0 0Z0MBZ0Z Z0Z0Z0Z0 PlPLKOPO Z0Z0Z0ZR a
rm0l0Z0s obo0Zko0 0o0ZpO0Z Z0ZpO0Z0 0Z0O0M0Z Z0Z0Z0Z0 POPZ0OPZ S0ZQJ0ZR a
4136 8
Double rook sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
0ZrZka0Z opZbmpZQ 0Z0ZpZ0Z Z0ZpM0Z0 0Z0o0Z0Z O0ZBZ0Z0 0ZPZKOPO l0A0Z0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4141 8 7 6 5 4 3 2 1
4144
rmbZ0ZkZ opZ0Z0op 0Z0ZpAnZ Z0opZ0Z0 0Z0O0ZQZ O0Z0ZNZ0 0ZPJ0OPO l0Z0ZBZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4146
rmbZkZ0s opo0Zpop 0Z0Z0Z0Z Z0Z0o0Z0 0ZqZ0Z0Z A0O0Z0L0 PZPO0Z0O S0Z0J0MR a
c
rZbZ0skZ o0Z0Zpop 0Z0Z0m0Z lpa0ZnZ0 0Z0ZpOPZ Z0MPZ0ZP POPA0Z0Z Z0JRLBMR a
4143 8
b
4145
rZ0ZkZrZ opZbm0ZQ 0Z0Zpo0Z Z0ZpO0Z0 0Z0Z0A0Z O0Z0ZNZ0 0ZPJ0OPO l0Z0ZBZR a
rZ0ZkZ0s opo0Zpop 0ZnZ0Z0Z ZBZQO0Z0 0a0O0Z0l Z0M0Z0O0 POPm0Z0O S0Z0J0ZR a
4142 8
Double rook sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rm0Z0skZ opo0Zpop 0Z0Z0A0Z Z0Z0L0Z0 0Z0Z0O0Z Z0Z0Z0Z0 POPoBZqO S0ZKZ0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4147 8 7 6 5 4 3 2 1
4150
rm0l0Z0s opo0Zkop 0Z0o0m0Z Z0Z0Z0Z0 0Z0OPZbM Z0Z0ZRZ0 POPZ0Z0o SNAQZ0ZK a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4152
rmbZ0ans opjpZ0Zp 0ZpZ0ZBZ Z0Z0M0ZQ 0Z0OpZ0Z Z0M0Z0Z0 POPZKO0O S0A0Z0Zq a
c
rm0Zkans o0o0Zpop 0o0Z0l0Z Z0Z0o0Z0 0ZBZPZ0Z ZQZ0Z0Z0 POPZ0OPO SNA0J0ZR a
4149 8
b
4151
rZ0ZkZnL opo0l0Z0 0ZpZ0ZpZ Z0a0ZbZ0 0Z0Z0Z0Z Z0Z0Z0Z0 POPO0OPO SNAKZ0ZR a
rmbZ0LBs opokZ0Zp 0Z0Z0ZpZ Z0Z0a0Z0 0Z0lpZ0Z Z0Z0Z0Z0 POPZ0OPO SNA0J0ZR a
4148 8
Double rook sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZ0ZkZ0s oQoqZ0op 0ZnZpZ0Z Z0ZpO0Z0 0a0MnZ0Z Z0O0Z0Z0 PO0Z0OPO SNA0J0ZR a
b
c
d
e
f
g
h
Laszlo Polgar
Chess Middlegames
4153 8 7 6 5 4 3 2 1
4156
QZ0Z0a0s o0okZpop 0Z0Z0Z0Z ZbZ0l0Z0 0Z0ZnZ0Z Z0O0A0Z0 PO0Z0OPO SNZ0J0ZR a
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
c
d
e
f
g
8 7 6 5 4 3 2 1
h
7 6 5 4 3 2 1
b
d
e
f
g
h
b
c
d
e
f
g
h
4158
rZ0lkZ0s Z0o0ZpLp pZ0obZ0Z Z0o0Z0A0 0Z0ZnZ0Z Z0Z0Z0ZP POPZ0OPZ SNZ0J0ZR a
c
rZbZkZ0s opZ0mpa0 0ZpZ0Z0o Z0ZqZ0o0 0Z0MpZ0Z Z0Z0L0A0 POPZ0OPO Z0JRZBZR a
4155 8
b
4157
rZ0ZkZns oQo0Zpop 0Z0obZ0Z Z0a0Z0Z0 0ZBZPO0l Z0Z0Z0Z0 POPZ0ZPO SNA0ZRZK a
rmbZ0Zns opZkZBop 0Zpo0Z0Z Z0Z0Z0Z0 0a0ZPA0Z Z0ZPZQZ0 PZPJNZPO lNZ0Z0ZR a
4154 8
Double rook sacrifice
c
d
e
f
g
h
8 7 6 5 4 3 2 1
rZbl0Zns opopZkZp 0Z0Z0ZpZ Z0a0L0Z0 0Z0ZPZ0Z Z0Z0Z0Z0 POPO0OPO SNA0J0ZR a
b
c
d
e
f
g
h
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