列氏溫標

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Brief notes by 卡拉卡拉

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Borya Ider – 韦奕 (Wéi Yì)
53rd World Junior Chess Championship; Pune, October 7, 2014
English Opening A38

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 c5 5. g3 Nc6 6. Bg2 d6 7. 0-0. For 7. h3 a6 8. 0-0 b5 9. d3 Rb8 10. Rb1 0-0 see Murshed – Negi, 7th Asian Continental Chess Championship, Subic Bay 2009. 7. ... 0-0 8. d3. Also interesting is 8. a3 Rb8 9. b4! with a slight edge for White, U. Andersson – Hecht, West Berlin 1971. 8. ... a6 9. Re1 Bg4 10. h3 Bxf3 11. Bxf3 Nd7 12. Bg2 Nd4 13. Be3 b5 14. Ne2 bxc4 15. dxc4 Nc6 16. Rb1 Rb8 17. Qd2 a5 18. Nc3 Nd4 19. Bxd4 cxd4 20. Nb5 Qb6 21. b3 h5 22. Red1 e5 23. Bf3 Nc5 24. Qg5. Losing time. More to the point was 24. h4 Ra8 (or 24. ... Rfc8) and White’s position looks still tenable. 24. ... Rbe8 25. Qd2 Kh7. Intending ... Bg7-h6. 26. h4. Else 26. a3 Bh6 and then ... h5-h4.

26. ... f5 27. Qe2. After 27. exf5 Rxf5 Black stands much better, but the text move is even worse. 27. ... d3 28. Rxd3. A desperate Exchange sacrifice, as after 28. Qe1 fxe4 Black’s rollerball is nevertheless decisive. 28. ... Nxd3 29. Qxd3 fxe4 30. Bxe4. If, instead, 30. Qxe4 then 30. ... d5! 31. Qxd5 e4! and Black’s attack will soon become irresistible. 30. ... Qxf2+ 31. Kh1 Rf6 32. Rg1 Ref8 33. Qd1. With the threat of Qd1xh5+. 33. ... Kh8 34. Nxd6 Bh6. The attack on the dark squares will prove to be decisive. 35. Qd5 Be3 36. Rg2 Qe1+ 37. Kh2 Bd4 38. Nb5 Rf1 39. Rc2 R1f4. Another way is 39. ... g5! 40. hxg5 h4 finis. 40. Bg2. If 40. gxf4 then 40. ... Qxh4+ 41. Kg2 Qg4+ fashioning a rapid mate. Equally after 40. Nxd4 Rxe4 White is doomed. 40. ... Rxh4+ 41. gxh4 Bg1+ 0 : 1.