Hou, Yifan (2609) - Shirov, Alexei (2696)

Tromso, World Cup 2013
[...] 1.e4 c5 2.¤c3
(2.¤f3 ¤c6 3.¥b5 is the Rossolimo Variation right and proper.)
2...¤c6 3.¥b5 ¤d4! Foiling White's plan to capture on c6 and play f4 as shown in the following variation.
(3...a6 4.¥xc6 bxc6 5.d3 d6 6.f4±) 4.¤f3
(If 4.¥c4 a6 5.¤f3 b5 6.¥d5 ¦b8 7.¤xd4 cxd4 8.¤e2 ¤f6 9.¤xd4 e6 10.¥b3 ¤xe4³ -David Smerdon)
(In this position the knight is stronger than the bishop. So it would be wrong to exchange him with 4...¤xb5. 5.¤xb5 a6 6.¤c3 d6 7.d4 cxd4 8.£xd4± is good for White as shown in Khachian-Eckert, St. Louis 2009)
(Not 5.¤xd4 cxd4 6.¤e2 (6.¤d5 e6 7.¤f4 £g5° is worse.) 6...¥g7µ)
5...¥g7 6.¤xd4 cxd4 7.£f3 David Smerdon calls this a fairly juvenile trick.But what else is there to play?
(7.¤b5 a6 8.¤a3 e6 followed by...Ne7 and ...d5 gives Black a satisfactory game.)
(7...e6 8.¤b5 £b6 (8...d6? 9.£a3!±) 9.£f4!)
(7...¤f6 is not bad and after 8.¤b5 Smerdon suggests
(8.e5 dxc3 9.dxc3 £b6 10.exf6 £xf6
(I see nothing wrong with 10...¥xf6 11.O-O O-O -CB)
11.£xf6 ¥xf6 -David Smerdon)
8...d5! 9.exd5 O-O 10.¤xd4 e5! With compensation for the material)
8.¤e2 O-O 9.h3 preventing...Ng4.But the queen still remains misplaced.
(9.d3 ¤g4 10.¥b3 d6 was played in Svidler-Leko, Dortmund 2004.)
(9.c3 dxc3 10.bxc3 (10.dxc3 ¤g4) 10...d6)
9...e6 10.d3 f5 11.£g3 fxe4 sidestepping any possible preparation by Hou.
(Alexie had played 11...b5! 12.¥b3 ¥b7 in Morozevich-Shirov, Wijk aan Zee 2001, 1/2-1/2, (41 moves))
12.dxe4 d5 13.exd5 exd5 14.¥d3 ¤f5 15.£h2 £e7 16.¥d2 ¤d6 17.¥b4 ¥e5 18.g3 a5 19.¥c5 £c7 20.¥xd4 ¥xd4 21.¤xd4 £b6
(21...¦e8+! 22.¢f1
(22.¤e2 ¥f5! 23.¥xf5 ¤xf5 gives Black a winning attack.)
(22.¢d1 £b6 23.¤b3 a4°) 22...£b6°)
22.¤e2 £b4+ (22...¤e4! 23.O-O ¤d2µ)
(22...£xb2? 23.O-O allows White to get back to safety.)
23.c3 £xb2 24.O-O ¤e4 25.£g2 ¦xf2 26.¦xf2 £xa1+ 27.¦f1 £xa2 28.c4 £d2 29.£f3 ¥xh3 This does not spoil anything.Other moves involved a little more calculation.
(29...¥e6! 30.¥xe4 dxe4 31.£xe4 ¦e8 32.¤f4 ¥f7 33.£xb7 ¥xc4°)
(29...¥f5! 30.g4 ¤g5 31.£xd5+ ¥e6 32.£xb7 £e3+ 33.¢g2 £xh3+ 34.¢g1 £xg4+ 35.¢h2 ¦d8°)
30.¥xe4 dxe4 31.£f7+ ¢h8 32.£f6+ ¢g8 33.£f7+ ¢h8 34.¦f2 e3 35.£f6+ ¢g8 36.¦f3