變數 (Variable)

侯逸凡 (Hóu Yìfán) – Nana Dzagnidze
16th European Women’s Chess Club Cup; Rogaška Slatina, October 1, 2011
Sicilian Defence B93

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e5 7. Nf3 Nbd7 8. a4 Be7 9. Bc4 0-0 10. 0-0 b6. Or, alternatively, 10. ... Qb6+ 11. Kh1 exf4 12. a5 Qc5 13. Bb3 Ne5 14. Bxf4 Ng6 15. Bg3 Bg4 16. Qd2 Rae8 17. h3 Bd7 18. Qd4 Bc6 19. Qd3 Nh5 20. Bf2 Qb4 21. Nd4 Nhf4 22. Qf3 Bf6 23. Nxc6 bxc6 24. Bb6 Bxc3 25. Ra4 Qb5 26. bxc3 c5 27. Raa1 Re7 28. Qe3 Nh5 29. Bd5 Nf6 30. Rxf6 gxf6 31. Qf3 Re5 32. Qxf6 Qd7 33. Rd1 Rh5 34. Rd3 Re5 35. Rg3 Qe7 36. Rxg6+ hxg6 37. Qxg6+ Kh8 38. Qh6+ Kg8 39. Qg6+ Kh8 40. Qh6+ ½–½ 侯逸凡 (Hóu Yìfán) – 居文君 (Jū Wénjūn), Women’s Grand Prix 2011–12, 2nd stage, 深圳 (Shēnzhèn) 2011.
11. Kh1 Bb7 12. Qe2 h6 13. Nh4!?TN Nxe4?! The acceptance of the Pawn sacrifice is quite critical.
14. Nf5 Nef6 15. fxe5 Nxe5 16. Bf4 Qc7 17. Bb3 Rae8 18. Qd2 Nh7 19. Bxh6? It was really hard to resist such a tempting sacrifice, but had 侯逸凡 (Hóu Yìfán) calculated to the end of her variation, she would have probably contented herself with 19. Rad1, assuring White a sound advantage.
19. ... gxh6 20. Qxh6 Bf6 21. Rf4? And now the threat of Rf4-h4 looks deadly.

21. ... Bc8? Dzagnidze probably excluded 21. ... Kh8! from her analysis for fear of 22. Rh4 — which actually looks like a win — apparently not noticing the counter move 22. ... Bxg2+! 23. Kxg2 (or 23. Kg1 Nf3+−+) 23. ... Rg8+ 24. Kh1 Bxh4 which gave Black the preponderance of both the material and positional values.
22. Ne4! Qd8 (22. ... Bxf5 23. Nxf6+ Nxf6 24.Rxf5+−)
23. Nexd6 Bxf5 24. Nxf5 Re6 25. Rh4 Ng5 26. Rh5 Qd2 27. Ne7+ Rxe7 28. Qxf6 Nh7 29. Qf5 1–0.