(1) Kosintseva,Tatiana (2581) - Dembo,Yelena (2454) [B67]
WCh Women Antakya TUR (2.1), 07.12.2010

1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6 8.0-0-0 Bd7 9.f3 h6 10.Be3 b5 11.Kb1 Ne5 12.Bd3 Be7 13.g4 b4 14.Nce2 d5 15.exd5 Nxd5 16.Nf4 Nxe3 17.Qxe3 Qa5 18.h4 Nxd3 19.Nxd3 Qc7 20.Ne5 Rd8 21.g5 g6
The position is won for White, and there is more than one way to bring the point home.

Although not the most precise, placing additional pressure on g6 is also strong. [The quickest way is 22.h5! Bxg5 23.f4 Bf6 24.hxg6 fxg6 25.Nxg6 and Black loses material.]


This, on the other hand, is a mystery. By playing Qe4, and allowing Black to close the kingside with h5, the only logical reason was to sac the piece on g6, which would also be the strongest move, so why this? [23.Nxg6! fxg6 24.Qxg6+ Kf8 25.Nxe6+ Bxe6 26.Rxd8+ Bxd8 27.Qxe6 Qf7 (27...a5? 28.Rd1 Rh7 29.f4 ) 28.Qxa6 Kg7 (28...Qxf3? 29.Rf1 ) ]

23...Bxc6 24.Rxd8+ Qxd8 25.Nxc6 Qd6 26.Ne5 Qd5 27.Qxd5 exd5 28.Rd1 Bc5 29.Rxd5 Bf2 30.Rd8+?
A tragic blunder. Clearly Kosintseva realized how badly she had botched her position and was affected by this. She no longer had any advantage, but after this she is lost.

30...Kxd8 31.Nxf7+ Ke8 32.Nxh8 Bxh4 33.Kc1 Bg3 34.Kd1 Kf8 35.Nxg6+ Kf7 36.Nh8+ Kg7 37.Ke2 Be5 38.c4 bxc3 39.bxc3 Kxh8 40.c4 Bf4 0-1