Deep Purple

Adam C. Hunt – 侯逸凡 (Hóu Yìfán)
10th Tradewise Gibraltar Chess Festival; Catalan Bay, January 25, 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. ... Nc6 7. g5 Nd7 8. Be3 Be7 9. h4 a6 10. Qe2!? Qc7 11. Bh3!? A new move. The theoretical milestone matrix was 11. 0-0-0 b5 12. Nxc6! Qxc6 13. Bd4! b4 14. Nd5 exd5 15. Bxg7 Rg8 16. exd5 Qc7 17. Bf6! Ne5 18. Bxe5 dxe5 19. f4! Bf5 20. Bh3 (20. fxe5 Rc8 21. Rh2!?±) 20. ... Bxh3 21. Rxh3 Rc8 22. fxe5 Qc4! 23. Rdd3 Qf4+ 24. Kb1 Rc4! 25. d6 Re4 26. Rhe3 Rxe3 27. Rxe3 Qxh4 28. Qf3! Qxg5! 29. Re1!? (29. Qc6+ Kf8 30. dxe7+ Qxe7 31. Qh6+ Rg7⩲) 29. ... Qg2 (29. ... Qg4 30. Qd3∞) 30. Qf5 Rg6 31. Rf1 Qd5 32. dxe7 Kxe7 33. Qf4 a5 34. Qh4+ Ke8 35. Qxh7 Qf3 36. Qh8+ Ke7 (36. ... Kd7 37. e6+!) 37. Qh4+ Ke8 38. Qc4! Qb7 39. b3!+− Re6 40. Rg1 Rxe5 41. Rg8+ Ke7 42. Qh4+ Kd7 43. Qf6! Re7 44. Qf5+ Kd6 45. Qxa5 Re5 46. Qd8+ Ke6 47. Kb2! f6 48. Rf8 Qg7 49. Qc8+ Kd5 50. Qc4+ 1 : 0 Karpov – Dorfman, 44th USSR Chess Championship, Moscow 1976. 11. ... Nc5 12. 0-0-0 Nxd4 13. Bxd4 0-0 14. Rdg1. 14. f4 b5 15. a3 is a suggestion by International Master Sam Collins. 14. ... b5 15. Bf5!? What a courage in the face of Caïssa! 15. ... exf5 16. Nd5 Qb7 17. Qh5? This is a one case in which the threat (Nd5-f6+) is not stronger than the execution! Better was 17. Nf6+ Bxf6 (17. ... Kh8? 18. Nxh7! Kxh7 19. Qh5+ Kg8 20. Bxg7! Kxg7 21. Qh6+ Kg8 22. g6+−) 18. gxf6 g6∞ with unclear play. 17. ... Ne6 (17. ... Nxe4?? 18. Nf6+!+−) 18. Nf6+ Bxf6 19. gxf6 g6? 侯逸凡 (Hóu Yìfán)’s blind spot. Black had to play 19. ... Qxe4! as 20. Rxg7+ Nxg7 21. Rg1 was met by 21. ... Qe1+!−+ winning immediately. 20. f3 Kh8. Not 20. ... Nxd4? on account of 21. Qh6 Ne6 22. h5!+− with the threat of 23. Qxh7+!! Kxh7 24. hxg6++ Kg8 25. g7 and mate next move. 21. Qh6 Rg8

22. h5? Hunt misses his once-in-a-lifetime chance with 22. Rg5!! and Black cannot do anything against h4-h5xg6; for instance: 22. ... Nxd4 23. h5! Ne6 24. Qxh7+! Kxh7 25. hxg6#; on other replies, there would follow 23. h5! Nxg5 24. hxg6 Rxg6 25. Qxg6! fxg6 26. f7#. 22. ... g5 23. Be3 f4 24. Bxf4 Nxf4 25. Rxg5 Rxg5 26. Qxg5 Ne6 27. Qg2 Bd7 28. Rg1 Qb6 0 : 1.

Gibraltar Mayor watching 侯逸凡 (Hóu Yìfán)’s game.