(1) Polugaevsky,L (2608) - Nezhmetdinov,R (2523) [A53]
Sochi Sochi, 1958



1.d4 Nf6 2.c4 d6 3.Nc3 e5
Avoiding the main lines, but allowing an early queen-exchange after d4xe5

4.e4
Perhaps Nf3 to sustain the tension in the center

4...exd4 5.Qxd4 Nc6
Gaining time on the queen

6.Qd2
Blocking the development of the Bc1, but overprotecting the Nc3 and preparing b3 and Bb3

6...g6 7.b3 Bg7 8.Bb2 0-0 9.Bd3
idea Nge2

9...Ng4
idea Nge5 and f5 or Qh4

10.Nge2 Qh4
threat Qxf2. The game now complicates very quickly

11.Ng3 Nge5
[11...Nxh2 traps the Nh2; 11...Nce5!? 12.Bc2 Bh6 13.f4 ]

12.0-0
[12.Bc2 Nd4 13.Qxd4 Nf3+ ]

12...f5
[The author gives 12...Ng4 13.h3 Nxf2 14.Qxf2 Bd4 15.Qxd4 Nxd4 16.Nd5 ]

13.f3 Bh6 14.Qd1 f4
[14...Be3+ 15.Kh1 f4 16.Nge2 Nb4 ]

15.Nge2 g5 16.Nd5 g4
Ignoring Nxc7

17.g3
[17.Nxc7 g3 18.h3 Bxh3 19.gxh3 Qxh3-+ ]

17...fxg3 18.hxg3 Qh3 19.f4
[19.fxg4 Bxg4-+ ]

19...Be6
[19...Nf3+ 20.Kf2 Qh2+ 21.Ke3 when white is fine]

20.Bc2
[20.fxe5 Bxd5 21.exd5 Be3+ ; 20.Bb1!? Rf7 ]

20...Rf7 21.Kf2 Qh2+ 22.Ke3 Bxd5 23.cxd5
[23.Qxd5 Nb4 24.Qd2 Bxf4+ 25.gxf4 Qh3+ 26.Kf2 g3+-+ ]

23...Nb4 24.Rh1
Diagram

24...Rxf4 25.Rxh2
[25.gxf4 Bxf4+ 26.Nxf4 Nxc2+ 27.Qxc2 Qxc2-+ ]

25...Rf3+
"Sunk in thought for a long time, I understood that I was to say goodbye to all hope andthat I was losing a game that would be spread all over the world" Polugaevsky

26.Kd4 Bg7!
[26...c5+ 27.dxc6 b5-+ 28.Bd3 Nexc6+ 29.Kc3 Bg7+ 30.Kd2 Rxd3+-+ ]

27.a4 c5+ 28.dxc6 bxc6 29.Bd3 Nexd3+ 30.Kc4
[30.e5 Bxe5+ 31.Kc4 (31.Ke4 d5# ) 31...d5# ]

30...d5+ 31.exd5 cxd5+ 32.Kb5 Rb8+ 33.Ka5 Nc6+
[33...Nc6+ 34.Ka6 Nc5# ] 0-1