evans - opsahl (CHERNEV) [D36]minority attack in the QGD exc, minority attack, 1950

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Nbd7 5. e3 Be7 6. Qc2 O-O 7. cxd5 exd5 8. Nf3 c6 9. Bd3 Re8 10. O-O Nf8 11. Rab1 Ne4 12. Bxe7 Qxe7
t+l+tSj+
Xx+-DxXx
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-+-Ps+-+
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pPq+-PpP
+r+-+rK-

The classic setting for the minority attack. 13. b4 a6 14. a4 Nxc3 15. Qxc3 Bg4 16. Nd2 Qg5 17. Rfc1 Re6
t+-+-Sj+
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x+x+t+-+
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pP-P-+l+
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-+-N-PpP
+rR-+-K-

Drumming up some King's-side counterplay. 18. b5 ! 18... axb5 19. axb5 Bh3 20. g3 Rae8 21. bxc6 bxc6 22. Bf1 ! 22... Bxf1 23. Nxf1 Ng6 24. Rb6
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-Rx+t+s+
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+-R-+nK-

A critical moment - if Black has to go back now he is really up against the ropes. 24... Ne7 [24... Nh4 25. Rxc6 The Rook on c6 stops the Black Rook on e6 joining the attack. I think the White King is safe here. 25... Nf3+ 26. Kh1 h5 27. Qb3 [27. Qd3]] 25. Qb4 h5 26. Rb8 Rxb8 27. Qxb8+ Kh7 28. Qf4 ! 28... Qxf4 29. gxf4 [The h-pawn cannot really be attacked, and with Queens off White can use the King] 29... g6 30. Nd2 Rd6 31. Kf1 Kg7 32. Ra1 Rd7 33. Nb3 Rb7 34. Nc5 Rb2 35. Ra7 Kf6 36. Ra6 Rb1+ 37. Kg2 Rb2 38. Ra7 Rb1 39. Rc7 Ra1 40. Nd3 Ke6 41. Nc5+ Kf6 42. Nd7+ Ke6 43. Nf8+ Kf6 44. Nh7+ Ke6 45. Ng5+ Kd6 46. Rb7
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-+xJ-+x+
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T-+-+-+-

46... f6 ? [46... f5] 47. Nh7 Ke6 48. Nf8+ Very neat 48... Kf7 [48... Kd6 49. Rd7#] 49. Nxg6 Kxg6 50. Rxe7 White has a pawn and hopes of collecting more. 50... Kf5 51. Rc7
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+-R-+-+-
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T-+-+-+-

51... Rc1 52. Rc8 Kg6 53. Kg3 Rc2 54. h4 Kf5 55. Rh8 Kg6 56. f5+ Kxf5 57. Rxh5+ Now White has a passed pawn. 57... Kg6 58. Rh8 Kf5 59. Rg8 Rc1 60. Kg2 Ra1 61. h5 Ra7 62. Rg3 Rh7 63. Rh3 Kg5 64. Kf3 Offering to trade the pawn for a winning King raid. 64... Rh6 65. Rh1 Kf5 66. Kg3 Kg5 67. Rh4 Kf5 68. Rf4+ Kg5
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-+-P-R-+
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69. Rg4+ ! Again offering the pawn, but again Black dare not accept. 69... Kf5 [69... Kxh5 is rather like the game continuation: 70. Rh4+ Kg5 71. Rxh6 Kxh6 72. Kf4 Kg6 73. f3 Kg7 74. Kf5 Kf7 75. f4 Ke7 76. Kg6 Ke6 77. f5+ Ke7 78. Kg7] 70. Kh4 Rh8 71. Rg7 Ra8 72. h6 Ra1 73. Rg3 Rh1+ 74. Rh3 Rg1 75. Rf3+ Kg6 76. Rg3+ The winning clearance 76... Rxg3 77. Kxg3 Kxh6 78. Kg4 Kg6 79. Kf4 Kg7 80. Kf5 Kf7 81. f3 1-0
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This document (Canon\canon358.html) was last modified on 13 Aug 2005 by [cool blue cat]

Dr. Dave