毒兵變著 (Poisoned Pawn Variation)

Tatiana Anatolyevna Kosintseva – 侯逸凡 (Hóu Yìfán)
FIDE Women’s Grand Prix 2013–14; 1st stage; Geneva, May 3, 2013
Sicilian Defence B97

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6!? 8. Qd2 Qxb2 9. Rb1 Qa3 10. e5 h6 11. Bh4 dxe5 12. fxe5 Nd5 13. Nxd5 exd5 14. e6 Bxe6 15. Nxe6 fxe6 16. Bd3. The alternative is 16. Be2 Be7 17. Bh5+ Kd8 18. Bxe7+ Qxe7 19. 0-0 Nd7 20. Rxb7 [20. Rf7 Qc5+ 21. Kh1 Rf8 22. Rxg7 Rc8 23. h3 Rc6 24. Qxh6 Kc8 25. Bg4 Qxc2 26. Re1 Qc3 27. Rxe6 Rxe6 28. Bxe6 Rf1+ 29. Kh2 Qe5+ 30. Rg3 Qe1 31. Qh8+ Kc7 32. Qc3+ Qxc3 33. Rxc3+ Kd6 34. Bxd7 Kxd7 35. h4 Ke6 36. h5 Kf6 37. Rc7 Kg5 38. Rxb7 Kxh5 39. Rb6 d4 40. Rxa6 d3 41. Rd6 Ra1 42. Kg3 Rxa2 43. Rd5+ Kg6 44. Rxd3 Ra6 45. Rd4 Rb6 46. Kf4 Ra6 47. Kg3 Rb6 48. Rg4+ Kh6 49. Kh4 Ra6 50. Rg8 Kh7 51. Rg5 Kh6 52. g4 Rb6 53. Rc5 Kg6 54. Rg5+ Kh6 55. Rh5+ Kg6 56. Rg5+ Kh6 ½ : ½ N. A. Kosintseva – 侯逸凡 (Hóu Yìfán), FIDE Women’s Grand Prix 2011–12, Rostov-on-Don 2011] 20. ... Qc5+ 21. Kh1 Rb8 22. Rxb8+ Nxb8 23. Qe2 Qb5 24. Qxb5 axb5 25. Rf7 Nc6 26. Rxg7 Rf8 27. Kg1 Nb4 28. Rb7 Nxc2 29. Rxb5 Ke7 30. a4 Ra8 31. Rb2 Ne3 32. Kf2 Nc4 33. Rb7+ Kd6 34. Bd1 e5 35. Rh7 Nb2 36. Rxh6+ Kc5 37. Bc2 Nxa4 38. h4 Nc3 39. Bf5 Ra2+ 40. Kf1 Ra1+ 41. Kf2 Ra2+ 42. Kf1 Nd1 43. g4 Ne3+ 44. Ke1 Kd4 45. Bc8 Ng2+ 46. Kd1 e4 47. h5 e3 48. Ba6 Nf4 49. Rb6 Nd3 50. Bxd3 Kxd3 51. Rb3+ Ke4 52. h6 d4 53. h7 Rh2 0 : 1 Shirov – 侯逸凡 (Hóu Yìfán), 10th Tradewise Gibraltar Chess Festival, Catalan Bay 2012. 16. ... Be7 17. Bg6+ Kd8 18. Bxe7+ Qxe7 19. 0-0 Nd7! 20. Rf7. Probably better than 20. Rxb7 Qc5+ 21. Kh1 Ra7 22. Rb3 Rf8 23. Rxf8+ Nxf8 24. Rb8+ Ke7 25. Bh5 g6 26. Qxh6 Qf2 27. Qg7+ Kd6 28. Qxf8+ Qxf8 29. Rxf8 gxh5 30. Rc8 e5 31. h4 d4 32. Kg1 Rf7 33. Ra8 Kd5 34. Rxa6 Rc7 35. g4 Rxc2 36. gxh5 d3 37. Ra8 d2 38. Rd8+ Ke4 39. Kf1 Ke3 0 : 1 Motylev – Sutovsky, 39th Chess Olympiad, Khanty-Mansiysk 2010. 20. ... Qc5+ 21. Kh1 Rf8 22. Rxg7 Rf6! It seems an improvement on 22. ... Kc7 23. Qe1!↑ T. A. Kosintseva – Forsaa, 9th Tradewise Gibraltar Chess Festival, Catalan Bay 2011.

23. Bd3. If 23. Qxh6 then 23. ... Qf8 (23. ... Qb4!? might also be good for Black) 24. h4 Ne5 25. Qh7 Rf1+ 26. Rxf1 Qxf1+ 27. Kh2 Qf4+ with perpetual check. 23. ... Kc7 24. c4 d4 25. Qe2 Raf8 26. Qe4 b6 27. Qh7 Rd8 28. a4 Qe5 29. h3 Qc5 30. Ra1 Kd6 31. Rb1 Kc7 32. Kg1 Qe5 33. Kh1 ½ : ½.

Tatiana Anatolyevna Kosintseva vs. 侯逸凡 (Hóu Yìfán). Photo: Anastasiya Valeryevna Karlovich