龍式變著

Sergey Fedorchuk – 侯逸凡 (Hóu Yìfán)
18th Corsican Circuit; Final; playoff game 2. Ajaccio, October 22, 2014
Sicilian Defence B72

1. e4 c5 2. Nf3 Nc6 3. Nc3 g6. Playing the Dragon is obviously highly symbolic... 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 Nf6 7. Be2 0-0 8. f4 d6 9. Nb3 a6. More usual is 9. ... a5 10. a4 Be6 11. 0-0 Rc8 with fairly even chances. 10. g4. For 10. a4 Be6 11. 0-0 Rc8 12. f5 Bxb3 13. cxb3 Nb4 14. Bc4 see Tseshkovsky – Azmaiparashvili, Minsk 1985. 10. ... b5 11. g5 Nd7 12. Qd2 Nb6. For 12. ... Bb7 13. 0-0-0 Na5 see Fogarasi – Kristjansson, Budapest 2005. 13. 0-0-0 Na4 14. Nd4 Bb7 15. Nd5 Nxd4 16. Bxd4 e5 17. fxe5 Bxd5 18. exd5 dxe5 19. Be3 Qd6 20. Kb1 Rac8 21. h4 e4 22. Bd4 Qxd5 23. Qe3 Bxd4 24. Rxd4 Qc5 25. c3 Rfd8 26. Rhd1 Rxd4 27. Rxd4 Re8 28. h5 Qe5 29. h6 Nc5 30. Bg4. Worth considering was 30. c4. 30. ... Kf8 31. a3 Ne6 32. Bxe6 Qxe6 33. a4 Qf5 34. a5? Going into a much unfavorable endgame. Correct was 34. Rd1!, e.g. 34. ... a5 35. c4!? bxc4 36. Qa3+ Kg8 37. Qe7! Qe6 with  even prospects. 34. ... Qf3! 35. Qxf3 exf3 36. Rf4 Re1+ 37. Kc2 Re2+ 38. Kb3 f2

39. Ka3? The decisive mistake. More resilient was 39. Rf6, even though after 39. ... Ke7 40. Ka3 Re5 41. Rxf2 Rxg5 Black’s extra Pawn will tell pretty soon in the endgame. 39. ... f5! Simply threatening to bring her King to e5. 40. b3. 40. gxf6 is met by 40. ... g5. 40. ... Ke7 41. Rf3 Ke6 42. Kb4 Kd5 43. Rf4 Re4+. Of course, 43. ... Ke5 would have won immediately, but also the text is sufficient to win. 0 : 1. For if 44. c4+ then 44. ... bxc4 45. Rxf2 cxb3+ 46. Kxb3 f4 with an easy win.

科西嘉快棋循环赛，侯逸凡2－0战胜费多尔丘克，夺得冠军。
Photo: @dalongzhouqian