Author: Andrew Williams
Date: 04:40:05 03/15/02
Go up one level in this thread
On March 15, 2002 at 05:13:17, Yuriy Lyapko wrote:
>Yesterday I saw very interesting queen endgame in my continuous blitz
>tournament.
>Beowulf had won it, but for wrong reason...
>It's evaluation was about +3.00 after black's 71st move, but the position was
>still drawn until Bringer's huge blunder on move 76.
>Interesting, that Beowulf v1.8 isn't so optimistic...
>Here is the game...
>
>[Event "Computer chess game"]
>[Site "LYAPKO"]
>[Date "2002.03.14"]
>[Round "2"]
>[White "Beowulf_19"]
>[Black "Bringer_19"]
>[Result "1-0"]
>[TimeControl "40/300"]
>
>1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. f3 d6 6. Bg5 a6 7. Qd2 Nbd7 8.
>d5 Ne5 9. Rd1 c6 10. f4 Ned7 11. dxc6 bxc6 12. Nf3 Rb8 13. e5 dxe5 14. Nxe5
>Qc7 15. Nxd7 Nxd7 16. Be2 Qa5 17. Kf1 f6 18. Bh4 g5 19. Bg3 e5 20. f5 Nc5
>21. Qc2 Qb4 22. Bf2 Nb7 23. a3 Qe7 24. g4 Nd8 25. b4 Qb7 26. Kg2 a5 27. Bc5
>Re8 28. h4 axb4 29. axb4 Nf7 30. hxg5 Nxg5 31. Ne4 Nxe4 32. Qxe4 Bf8 33.
>Bxf8 Rxf8 34. Qd3 Qg7 35. Rb1 c5 36. Qd5+ Kh8 37. bxc5 Rxb1 38. Rxb1 Bxf5
>39. Rb7 Qg5 40. Qd6 Rg8 41. Kf2 Qf4+ 42. Ke1 Bxg4 43. Bxg4 Rxg4 44. Rb8+
>Kg7 45. Qf8+ Kg6 46. Qe8+ Kh6 47. Qf8+ Rg7 48. Rb6 Kg6 49. Qe8+ Kg5 50. Qe6
>Ra7 51. Ra6 Qe3+ 52. Kf1 Rxa6 53. Qxa6 Qxc5 54. Qb5 Qe3 55. c5 h5 56. c6 h4
>57. Qb7 Qf3+ 58. Kg1 Kg6 59. Qd7 h3 60. Qe8+ Kf5 61. Qd7+ Kf4 62. Qd2+ Kg3
>63. Qh2+ Kg4 64. Qc2 Qe3+ 65. Kh2 Qg3+ 66. Kh1 Qf3+ 67. Kg1 h2+ 68. Kxh2
>Qh3+ 69. Kg1 Qe3+ 70. Kh1 Kg5? 71. c7 Qh3+ 72. Kg1 Qc8 73. Qd2+ {1} Kg6 74. Qd8
>Qg4+ 75. Kf2 Qf4+ 76. Ke2 Qh2+?? {2} 77. Kd3 Qg3+ 78. Kc4 Qf4+ 79. Kd5 Qd4+ 80.
>Ke6 Qc4+ 81. Ke7 Qc5+ 82. Qd6 Qa7 83. Qxf6+ Kh7 84. Qf5+ Kg8 85. Qd7 Qc5+
>86. Kf6 Qb6+ 87. Qe6+ Qxe6+ 88. Kxe6 Kg7 89. c8=Q e4 90. Ke7 e3 91. Qg4+
>Kh8 92. Kf8 e2 93. Qg8#
>{White Mates} 1-0
>
>Here are the key positions:
>
>{1} 2q5/2P5/5p2/4p1k1/8/8/2Q5/6K1 w - -
>73.Kh2! Kh6! (the only move to hold the position) 74. Qd2+ Kg7! 75. Qd8 Qf5! 76.
>c8=Q Qf2+ with draw
>I wonder how many programs will find 73.. Kh6! and in how much time...
>
PostModernist takes 62 seconds to find Kh2 and 770 seconds to find Kh6
on my Athlon 1200.
>{2} 3Q4/2P5/5pk1/4p3/5q2/8/4K3/8 b - - 0 5
> 76..Qe4+! 77. Kd2 Qg2+(Qb4+ also possible) 78. Kd3 Qf3+ 79. Kc4 Qc6+=
>or 78. Ke3 Qh3(g3)+ 79. Ke4 Qg2+=
>
PM never considers anything other than Qe4 here.
Andrew
>finally here are Beowulf's evals(at 20 sec):
>
>FEN = 8/8/2P2p2/4p1k1/8/4q3/2Q5/7K w - -
>1.9: 9 305 1297 348964 c7 Qh3+ Kg1 Qc8 Qd2+ Kg6 Qd8 Qg4+ Kf2 Qf4+
>Ke2 Qe4+ Kd2 Qf4+ Kd3
>1.8: 9 26 1242 367919 c6c7 e3h3 h1g1 h3c8 c2d2 g5g6 d2d8 c8g4 g1f2
>g4f4 f2e2 f4e4 e2d2 e4f4 d2c3
>FEN = 8/2P5/5p2/4p1k1/8/7q/2Q5/7K w - -
>1.9: 10 325 1664 492730 Kg1 Qc8 Qd2+ Kg6 Qd8 Qg4+ Kf2 Qf4+ Ke2 Qe4+
>Kd2 Qf4+ Kc3 Qc1+ Kb3 Qe3+ Ka4
>1.8: 9 32 890 295027 h1g1 h3c8 c2d2 g5g6 d2d8 c8g4 g1f2 g4f4 f2e2
>f4e4 e2d2 e4b4 d2d3 e5e4 d3e3
>FEN = 3Q4/2P5/5pk1/4p3/6q1/8/8/6K1 w - -
>1.9: 10 315 1906 528574 Kf2 Qf4+ Ke2 Qe4+ Kd1 Qf3+ Kc2 Qc6+ Kb3 Qb6+
>Kc4 Qc6+ Kd3 Qf3+ Kd2 Qg2+ Ke3 Qh3+ Ke4 Qg2+ Kd3 Qf3+ &rep.
>1.8: 9 35 1406 473480 g1f2 g4f4 f2e2 f4e4 e2d2 e4b4 d2d3 b4b5 d3c3
>b5c5 c3b3 c5b5 b3c3 &rep.
>FEN = 3Q4/2P5/5pk1/4p3/4q3/8/4K3/8 w - -
>1.9: 9 300 1241 329201 Kd2 Qg2+ Kd3 Qf3+ Kc4 Qc6+ Kb4 Qb6+ Ka4 Qa6+
>Kb3 Qb6+ Ka2 Qa5+ Kb2 Qb6+ Kc1 Qc6+ Kb2 Qb6+ &rep.
>1.8: 9 32 1291 440694 e2d2 e4g2 d2c3 g2c6 c3b4 c6b6 b4c4 b6c6 c4b3
>c6b5 b3c2 b5c6 c2b2 c6b5 b2c2 &rep.
>FEN = 3Q4/2P5/5pk1/4p3/8/8/3K2q1/8 w - -
>1.9: 9 311 1642 462607 Ke3 Qg3+ Ke4 Qg2+ Kd3 Qf3+ Kc4 Qc6+ Kd3 Qf3+
>&rep.
>1.8: 10 0 1521 556172 d2c3 g2c6 c3d3 c6f3 d3c2 f3c6 c2b1 c6b6 b1c2
>b6c6 &rep.
>
>Best regards,
>George
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