Mikhail Botvinnik derrota a Sozin

Botvinnik,Mikhail - Sozin,Veniamin [E23] Leningrad Masters¨- Leningrad (5 ronda) (5 round), 01.1933 [Guillermo Muñoz Portugal] E23: Defensa Nimzoindia (4.Db3) 1.d4 Cf6 2.c4 e6 3.Cc3 Ab4 4.Db3 c5 5.dxc5 Cc6 6.Ag5 h6 7.Axf6 Dxf6 8.Cf3 Axc5 9.e3 0-0 [9...b6 10.Ad3 Ab7 11.Ce4 Ab4+ 12.Re2 De7 13.a3 Ac5 14.Cxc5 Dxc5 15.Dc3 0-0 16.Thd1 a5 17.Rf1 Tfd8 18.Ae2 Ce7 19.Tac1 d5 20.cxd5 Dxc3 21.Txc3 Cxd5 22.Tcc1 Tac8 23.Re1 Rf8 24.Cd4 Zhou,J (2620)-Bu,X (2723) Wuxi 2016 ½-½ (31)] 10.0-0-0 De7 11.Ae2 a6N [11...b6 12.g4 Ab7 13.Thg1 g6 14.g5 hxg5 15.Cxg5 Tac8 16.h4 d5 17.Rb1 d4 18.Cb5 Ca5 19.Dd3 dxe3 20.fxe3 Tfd8 21.Dc2 Txd1+ 22.Axd1 Axe3 23.Tg3 Cxc4 24.Cc3 Af4 25.Tg4 Ce3 0-1 (25) Belsky,A (1400)-Litvinov,V (2125) Moscow 2009] 12.g4 [12.Rb1 b5=/+] 12...b5=/+ 13.g5 Ca5 [13...hxg5 14.Thg1 bxc4 15.Dxc4=/+] 14.Dc2= bxc4?? [14...hxg5 15.Thg1 f6+/=]

15.gxh6+- g6 [15...Cc6 16.hxg7 Td8 17.Thg1+-] 16.Thg1 [>=16.h4 Rh8 17.h5+-] 16...Rh7?? [>=16...Cc6 17.Axc4 Rh7+-]

17.h4 Tg8 [17...Rxh6 18.h5! Rg7 19.Ce5+-] 18.h5 d6 [18...Cc6 19.hxg6+ fxg6 20.Ce4+-] 19.Cg5+ [>=19.hxg6+!? fxg6 20.Cg5+ Rh8+-] 19...Rh8 20.Cce4 [>=20.hxg6!? fxg6 21.Cce4 Tf8 22.Cxc5 Cb7+-] 20...e5 21.Cxc5 dxc5 [21...Af5 22.Cce4 f6 23.Cf7+ Dxf7 24.Cxd6 Dh7+-] 22.hxg6 fxg6 23.Dc3 Cc6

24.Af3 [24.Td6 Ad7 25.f4 Tgf8 26.fxe5 Ae8+-] 24...Cb4 25.Dxc4 Tb8 [25...Ta7 26.a3 a5+-] 26.Cf7+ Rh7 27.Cg5+ Rh8 28.Cf7+ [28.a3!? Tf8 29.axb4 cxb4+-] 28...Rh7 29.Cg5+ [29.a3 Af5 30.Cg5+ Rh8+-] 29...Rh8 30.a3 Af5 31.Df7 [31.e4 Ac8 32.axb4 Txb4+-] 31...Ca2+ [31...Dxf7 32.Cxf7+ Rh7 33.axb4+-] 32.Dxa2 c4 33.Ad5 [33.Dxc4?! Tgc8 34.Ac6 Tb6 35.Cf7+ Rh7+/=] 33...Tgc8 34.Cf7+ Rh7

35.Cd6! Ad3 [35...Dxd6 36.Ag8+ Txg8 a) 36...Rxg8 37.Txd6; b) 36...Rxh6 37.Txd6 (37.Th1+) ; c) 36...Rh8 37.Txd6; 37.Txd6] 36.Cxc8 Txc8 37.a4 Dd6 [37...a5 38.Th1+-] 38.Da3 Tc5 [38...Dxa3 39.bxa3 Tb8 40.Txd3 cxd3+-] 39.Ae4! Df8 [39...Axe4 40.Txd6] 40.Axd3 cxd3+ 41.Rb1 e4 42.Tc1 [42.Tc1 Txc1+ 43.Rxc1+-] 1-0