永动机 (Perpetual motion)

Alisa Mikhailovna Galliamova – 侯逸凡 (Hóu Yìfán)
19th Women’s European Chess Club Cup; Bilbao, September 19, 2014
Queen’s Pawn Game A40

1. d4 e6 2. c4 b6 3. e4 Bb7 4. d5 Bb4+ 5. Bd2 Bxd2+ 6. Qxd2 d6 7. Nc3 Nd7 8. f4 e5 9. g3 exf4 10. gxf4 Qh4+ 11. Qf2 Qxf2+ 12. Kxf2 Ngf6 13. Re1 0-0 14. Bh3. An impulsive move, which will have unpleasant consequences. Wisdom demands 14. Nf3 Nh5 15. e5 Nxf4 16. exd6 c6 (16. ... cxd6 17. Nb5) 17. dxc6 Bxc6 18. Rg1 Rae8 with an even game. 14. ... Nc5 15. Re3 Rae8 16. Kf3 c6. Undermining the hostile centre. 17. Nge2 cxd5 18. exd5 b5 19. Rxe8. Alisa understimates the power of the hostile Queen’s Bishop and will have to pay the price, but it’s not easy to suggest anything better. The puerile 10. Nxb5? is met by 10. ... Nxd5! and even after 19. b4 Na4! 20. Nxa4 Nxd5! Black comes out clearly better. 19. ... Rxe8 20. Rd1 bxc4 21. Rd4 g6 22. Ng3 h5 23. Bf1 h4 24. Nge2 Ba6 25. Rd2 Nd3 26. Nd4 Ne1+ 27. Kf2 Ne4+ 28. Nxe4 Rxe4 29. Bg2. No better is 29. Nf3 Rxf4 with an easy win. 29. ... Nxg2 30. Kxg2 Rxf4 31. Nc6

31. ... c3! A fine vacating sacrifice. 32. bxc3 Bf1+ 33. Kg1 Bh3 34. Rd1 Rg4+ 35. Kf2 Rg2+ 36. Kf3 Rxa2 37. c4 Kg7 38. Kf4 Rc2 39. Rd4 Rxh2 40. Nxa7 Bd7 41. Nc6 Rg2 42. c5 Rg4+. Sic et simpliciter. Another way is 42. ... Rg3 with the deadly threat of 43. ... g5+ 44. Ke4 f5#. 43. Ke3 Rxd4 44. Nxd4 dxc5 0 : 1.

侯逸凡 (Hóu Yìfán). Photo: Francisco Javier Ochoa de Echagüen.