Sunday, August 23, 2020

坐標化 (Geocoding)

侯逸凡 (Hóu Yìfán) – Phạm Lê Thảo Nguyễn
1st Online Chess Olympiad Top Division Pool A; China – Vietnam; time control: 15 minutes plus 5 seconds per move; chess.com, August 23, 2020
Caro-Kann Defence B13

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4 g6 7. Nf3 Bg7 8. Nbd2 Bd7 9. h3 Qc8 10. Qb3 0-0 11. 0-0 Re8 12. Ne5 Bf5 13. Bb5 a6 14. Be2 Be6 15. a4 Nd7 16. Nxd7 Qxd7 17. Rfe1 Rac8 18. a5 h6 19. Bf3 Na7 20. Qd1 Bf5 21. Nb3 Qc6 22. Qd2 Kh7 23. Re3 Be4 24. Bxe4 dxe4 25. Rae1 f5 26. f3 Qb5 27. fxe4 e5? This is probably the climax of the game: Black had to play 27. ... Qxb3! with a very unclear position.


28. c4! Black must have overlooked this move. 28. ... Rxc4. No better is 28. ... Qxc4 on account of 29. exf5 exf4 30. Rxe8 Rxe8 31. Rxe8 Qxb3 32. Qxf4 with a crushing attack. 29. exf5 gxf5 30. Bxe5 Nc6. Or 30. ... Bxe5 31. Qf2! winning immediately. By the way, the text only allows Black to last a little longer: 31. Bxg7 Rxe3 32. Rxe3 Kxg7 33. Re6 f4 34. Qxf4 Qg5 35. Qc7+ Kf8 36. Qd6+ Kf7 37. Qd7+ Ne7 38. Re4 Rc2 39. Qe6+ Kf8 40. Rg4 Rc6 41. Qe4 Qd5 42. Qf4+ Ke8 43. Nc5 Rd6 44. Ne4 Qxd4+ 45. Kh2 Rd8 46. Nf6+ 1 : 0.

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