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.
22.Qe4
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.]
22...h5
23.Ndc6?!
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