Unity Chess Club
Boris Spassky 2610 Robert Hübner 2600 Solingen 1977 White to move
With his last move, Black exchanged the light-squared bishop on d3. Everything would be fine for him if White had to take back on d3, but there followed the zwischenzug:
Allowing a forcing finish.
Bad was 24...Qf8? 25.Bxg7 Rxg7 26.Rxg7+ Qxg7 27.Qxe6++–.
The most tenacious was 24...Qe7! 25.Bxg7 25...f4! 26.Rg4 Bf5 27.Bf6+ Bxg4 28.Bxe7 Rxe7, but here too, there follows 29.d5! (29.Qxf4 Rg7!) 29...Rf8 30.f3 Bf5 31.Qxf4+–.
Bad was 24...Qf8? 25.Bxg7 Rxg7 26.Rxg7+ Qxg7 27.Qxe6++–.
The most tenacious was 24...Qe7! 25.Bxg7 25...f4! 26.Rg4 Bf5 27.Bf6+ Bxg4 28.Bxe7 Rxe7, but here too, there follows 29.d5! (29.Qxf4 Rg7!) 29...Rf8 30.f3 Bf5 31.Qxf4+–.
25.Qxe6 Bc4 26.Rxg7+ Kf8 27.Bxc7 Qxc7 28.Rxf7+ Qxf7 29.Qd6+ Kg8 30.Qd8+ 1-0
Unity Chess Club
Richard Teichmann Jacques Mieses Vienna 1903 Black to move
We have a sharp position on the board. It seems as though Black is winning, but it is important to find the correct order of moves. Calculating straightforward variations does not yield the correct answer:
A) 28...Re2? 29.Rxf3! Qxf3 30.Qxe2 Qxf4 31.Qxe6+=;
B) 28...Rd5+? 29.Kc1! (29.Ke1 Qc2!) 29...Qxa2 30.Qa4∞;
C) After 28...Qe2+!?, Black still has to show his endgame technique: 29.Kc1 Re4 30.Qxe2 fxe2 31.Re1 Rxf4 32.Rxe2 Kf7 33.Rd2 Ke7 34.Rg2 Kf6 35.Rd2-/+
Instead, he decides the game with:
A) 28...Re2? 29.Rxf3! Qxf3 30.Qxe2 Qxf4 31.Qxe6+=;
B) 28...Rd5+? 29.Kc1! (29.Ke1 Qc2!) 29...Qxa2 30.Qa4∞;
C) After 28...Qe2+!?, Black still has to show his endgame technique: 29.Kc1 Re4 30.Qxe2 fxe2 31.Re1 Rxf4 32.Rxe2 Kf7 33.Rd2 Ke7 34.Rg2 Kf6 35.Rd2-/+
Instead, he decides the game with:
Unity Chess Club
Vladimir Akopian 2655 Miguel Illescas Cordoba 2635 Ubeda 1997 White to move
The immediate knight sacrifice on g7 does not bring success, because the black queen can defend along the fifth rank. Therefore, White first drove the queen away:
25.Qg5! d5 26.Rxh7 Bc5+ 27.Nxc5 Nxh7 28.Qh6+ Ke7 29.Qh4+ Kf8 30.Qh6+ Ke7 31.Qh4+ Kf8 32.Qxh7 Re6 33.Nxe6+ fxe6 34.Qg7+ Ke8 35.Bf6 Qd6 36.Qg8+ Kd7 37.Qxa8 Qb6+ 38.Kf1 dxe4 39.Qf8 1-0
Unity Chess Club
Jan Gustafsson 2633 Zahar Efimenko 2702 Halkidiki Ech tt 2011 White to move
The position has an unclear character. If Black manages to stabilise and strengthen his position, he will hardly be worse. White needs to play energetically.
The decisive mistake.
Black could maintain equality in the complications after 25...gxh6! 26.Bxe4 Nd2!. There are many variations here, but there seems to be no advantage for White in any of them.
Black could maintain equality in the complications after 25...gxh6! 26.Bxe4 Nd2!. There are many variations here, but there seems to be no advantage for White in any of them.