推敲 (Revision)

Hikaru Nakamura – 侯逸凡 (Hóu Yìfán)
16th Univé Chess Festival; Hoogeveen, October 23, 2012
Sicilian Defence B81

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. g4. The Keres Attack. 6. ... h6 7. Rg1 e5!? Very interesting novelty. 7. ... Nc6 is a tabiya. 8. Bb5+ Nbd7 9. Nf5 a6 10. Bxd7+ Qxd7 11. g5 Nxe4 12. Nxg7+ Bxg7 13. Nxe4 Qc6 14. Qd3. White rightly refuses the Pawn, as after 14. Nxd6+ Ke7 15. Nxc8+ Raxc8 16. Qg4 Rcd8 17. c3 hxg5 18. Bxg5+ Bf6 19. h4 Bxg5 20. Qxg5+ f6! (21. Qg7+ Ke6) Black is fine. 14. ... Ke7 15. gxh6 Bxh6 16. Bxh6 Rxh6 17. Qe3 Rh5. By necessity. Black couldn’t allow the Queen check on g5 (17. ... Rh3?? 18. Qg5+ Kd7 19. Nxd6!+−). 18. Rd1 (18. 0-0-0?? Bf5) 18. ... Bf5 19. Ng3. Not 19. Nxd6? because of 19. ... Bxc2 20. Rd2 Rd8 with equality.

19. ... Bxc2? Black sacrifices her Bishop for two Pawns but no other positional compensation. Instead, after 19. ... Rah8! (an Exchange sacrifice in the style of Petrosian) 20. h3! (or 20. Nxh5 Rxh5 21. c3 Rxh2 with a dynamic balance) 20. ... Bxh3 21. Nxh5 Rxh5 22. Kd2! Bf5 23. Qc3 Qb6 24. Kc1 Rh2 25. Rgf1 Black has only one Pawn for the Exchange, but far more positional benefits. 20. Nxh5 Bxd1 21. Kxd1 Qd5+ 22. Ke2 Qxa2 23. Qg5+ Kd7 24. Qf5+. Nakamura is in no hurry. After 24. Rc1! Black could resign (24. ... Qxb2+ 25. Kf1+−). 24. ... Ke7 25. Qc2 Qa5 26. Ng3 Qb5+ 27. Kf3 Qc6+ 28. Qe4 Rh8 29. Nf5+ Kd7 30. h4+− Qb5 31. Rd1 Qxb2 32. Nxd6 (32. Qc4!+−) 32. ... Kc7 33. Nc4 Qb5 34. Nxe5 f6 35. Rc1+ (35. Rb1!+− Qxe5 36. Rxb7+ Kd6 37. Qb4+ Kc6 38. Qb6+ Kd5 39. Rd7+ Kc4 40. Rc7+ Kd3 41. Qb1+ Kd2 42. Qc1+ Kd3 43. Qd1 mate) 35. ... Kb8 36. Rb1 f5. Spes, ultima dea: Black hopes for 37. Nc6+?? Ka8 turning tables. 37. Qxf5 Qd5+ 38. Qe4 Rf8+ 39. Ke3 Qc5+ (39. ... Qxe4+ 40. Kxe4 Rxf2 41. Ng4+−) 40. Qd4 Qxd4+ 41. Kxd4 Rf4+ 42. Ke3 Rxh4 43. f4 Kc7 44. f5 Kd6 45. Ng6 Rh7 46. Rd1+ Kc7 47. Kf4 b5 48. f6 Rf7 49. Ke5 1 : 0.

侯逸凡 (Hóu Yìfán). Photo: Univé Schaaktoernooi.