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(1) Hou Yifan (2602) - Yu Yangyi (2652) [B30]
ch-CHN 2011 Xinghua Jiangsu CHN (6), 04.04.2011
1.e4
c5
2.Nf3
Nc6
3.Nc3
Nf6
4.Bb5
g6
5.h3
Bg7
6.e5
Ng8
7.Bxc6
dxc6
8.d3
Nh6
9.g4
0-0
10.Qe2
[10.Be3
f5
11.g5
Nf7
12.Bf4
Qb6
13.b3
Nd8
14.Ne2
Be6
15.c4
Bf7
16.Qd2
Ne6
17.0-0
Rfd8
18.Bg3
a5
19.Nf4
a4
20.Qc2
Rd7
21.Rfd1
Qa7
22.Rab1
axb3
23.axb3
Qa2
24.Rb2
Qa5
25.Nxe6
Bxe6
26.Bf4
1/2-1/2 (43) Kasimdzhanov,R (2672)-San Segundo Carrillo,P (2570)/San Sebastian 2009/CBM 132 (43)] 10...f6
11.Be3
Nf7
12.0-0-0
fxe5
13.Nd2!
Instead of the pawn grab with Bxc5, Hou prefers to immediately exploit the beautiful e4 square that is practically screaming to have a knight placed on it. 13...b6
14.h4
h6
15.Nde4
Be6
16.Rdg1
a5
17.Kb1
a4
18.a3
Ra7
19.Qd2
Kh8
20.f3
c4
21.Ng5!?
This is not winning, but it certainly puts Black on the defensive, forcing him to play very precisely to avoid being evicted from the battlefield. 21...hxg5
22.Qh2!
Kg8
23.hxg5
Nh8
24.Qh7+
Kf7
25.f4!
[The engines in their mathematical innocence suggest 25.dxc4?!
Bxc4
26.Re1
instead of the line played, but Yifan's move (second best according to them) is unquestionably the most problematic for Black, and therefore best in a tournament game.] 25...cxd3
26.f5
dxc2+
27.Kc1
Bc4
28.Rh2
Rg8
29.f6!
exf6
30.gxf6
Ke8
Pretty much forced. [30...Qxf6
loses the queen to 31.Rf2
; 30...Kxf6
also loses the queen to 31.Bg5+
and if 31...Kxg5?
32.Qh4+
Kf4
33.g5+
Kf5
34.Qg4#
] 31.Rd2
Qxf6
32.Ne4
Qe6
33.Nd6+
Kf8
34.Nxc4
Nf7
35.Bxb6
Qxc4
Resigned?? [35...Qxc4
Astonishingly, it would seem that Yangyi failed to see the saving sequence. "Astonishingly" because he is no slouch in tactics, and you don't resign unless you are sure there is no hope. After 36.Rxc2
(36.Bxa7?
*loses* to 36...Bh6!
37.g5
Rg7!
and the queen is trapped!) 36...Qf4+
37.Kb1
Re7
38.Bc5
Bf6
The game is afoot.] 1-0
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