(1) Dueckstein - Petrosian [B18]
Varna ol, 1962



1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.Nf3 Nd7 7.Bd3 e6 8.0-0 Qc7 9.c4 0-0-0 10.Bxg6 hxg6 11.Qa4 Kb8 12.b4 Nh6 13.Qb3 Nf5 14.a4 e5 15.dxe5 Nxe5 16.Nxe5 Qxe5 17.Bb2 Qc7 18.c5
Diagram Here's the position in the quiz. Bellin provides three possible plans: 1) Counter-attacking down the h-file with Qf4-h4; 2) Relying on the pin of the Bg3 to play Nd4 with the aim of simplifying to the endgame; and 3) Attacking the b4-c5 pawn duo in order to activate the Bf8

18...a5 19.Rad1
[19.bxa5 Bxc5 20.a6 b6 With the better pawns structure and very active pieces.]

19...Rxd1 20.Rxd1 Rh4 21.bxa5 Bxc5
Black has succeeded in developing the bishop. The Ng3 cannot take othe Nf5 owing to the threat of Qxh2

22.a6
[22.Nxf5 Qxh2+ ]

22...b6 23.Re1 Ka7 24.Be5 Qd7 25.Ne4
[25.a5 b5 ]

25...Bd4 26.g3 Bxe5 27.gxh4 Nd4 28.Qd1 Qd5
[28...Qf5 ]

29.Re3 Nf5 30.Re1 Nd4 31.Qd3 f5 32.Ng5 c5 33.Re3 c4 34.Qd1 Kxa6 35.Ra3 Bf6 36.h3 f4 37.Qg4 Ka5 38.Nf3 Kb4 39.Nxd4 Kxa3 40.Nc2+ Kxa4 0-1