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Subject: Where did black go wrong?

Author: Andreas Guettinger

Date: 14:24:07 01/13/06


Interesting game that occured between Yace PB and Rybka 1.0 beta 32bit.  After a
sac and nice play from Rybka I had the impression black should win this. But the
endgame turned out to be difficult for Rybka and despite the black pawn on the
second row the game ended in a draw. Did black go wrong? Or probably it was not
more than a draw?


[D] 2R5/8/6p1/4p1p1/4P3/5P1P/pk4K1/r7 w - - 6 51

Athlon64 3400+
Time 60' + 10


[Event "Computer chess game"]
[Site "belugabox"]
[Date "2006.01.10"]
[Round "1"]
[White "Yace Paderborn"]
[Black "Rybka v1.0 beta"]
[Result "1/2-1/2"]
[TimeControl "3600+10"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. Bb3 a6 7. Nbd2 Ba7 8.
h3 Ne7 9. Nf1 Ng6 10. Ng3 O-O 11. O-O Be6 12. Bg5 h6 13. Bxe6 fxe6 14. Bd2
d5 15. c4 dxc4 16. dxc4 Nd7 17. Bc3 Qe7 18. Kh2 Rad8 19. Qc2 Rxf3 20. gxf3
Qh4 21. Bd2 Nc5 22. Be3 Nd3 23. Ne2 Ndf4 24. Nxf4 Nxf4 25. Bxf4 Qxf4+ 26.
Kg2 Rd2 27. Qc1 Qg5+ 28. Kh1 Bxf2 29. Rxf2 Rxf2 30. Qxg5 hxg5 31. Rd1 Rxb2
32. Rd7 Rxa2 33. Rxc7 Rb2 34. Re7 a5 35. Rxe6 a4 36. Re8+ Kh7 37. Ra8 Ra2
38. Kg1 a3 39. Kf1 Ra1+ 40. Kg2 Kg6 41. Ra7 a2 42. c5 Kf6 43. Kh2 Ke6 44.
Kg2 Kd7 45. Rxb7+ Kc6 46. Ra7 Kxc5 47. Kh2 g6 48. Kg2 Kc4 49. Ra8 Kc3 50.
Rc8+ Kb2 51. Rb8+ Ka3 52. Ra8+ Kb4 53. Rb8+ Kc5 54. Ra8 Kc4 55. Ra3 Kb4 56.
Ra8 Kb3 57. Rb8+ Kc2 58. Rc8+ Kd2 59. Rd8+ Ke2 60. Ra8 Kd3 61. Ra4 Kc3 62.
Ra6 Kd2 63. Ra3 Kc2 64. Ra6 Kc1 65. Ra8 g4 66. hxg4 Kb2 67. Rb8+ Kc3 68.
Rc8+ Kd2 69. Ra8 g5 70. Rd8+ Ke2 71. Ra8 Kd3 72. Ra4 Kc3 73. Ra8 Kc4 74.
Rc8+ Kd4 75. Rd8+ Kc5 76. Rc8+ Kb4 77. Ra8 Kc3 78. Ra7 Kc2 79. Rc7+ Kd2 80.
Rd7+ Ke2 81. Ra7 Ke3 82. Ra3+ Kd4 83. Ra5 Kc4 84. Ra8 Kb3 85. Rb8+ Kc2 86.
Rc8+ Kb2 87. Rb8+ Ka3 88. Ra8+ Kb4 89. Ra7 Kb3 90. Rb7+ Ka4 91. Ra7+ Kb5
92. Ra3 Kc5 93. Ra5+ Kc6 94. Ra6+ Kd7 95. Ra8 Ke6 96. Ra7 Kf6 97. Ra6+ Ke7
98. Ra7+ Kd6 99. Ra5 Kc7 100. Ra7+ Kc8 101. Ra8+ Kd7 102. Ra7+ Ke6 103.
Ra6+ Kf7 104. Ra7+ Kg6 105. Ra6+ Kg7 106. Ra7+ Kh6 107. Ra6+ Kh7 108. Ra7+
Kg8 109. Ra6 Kf8 110. Ra5 Kg8 111. Ra7 Kf8 112. Ra8+ Ke7 113. Ra7+ Kd8 114.
Kh2 Kc8 115. Kg2 Kb8 116. Ra5 Kb7 117. Ra3 Kb6 118. Ra8 Kb5 119. Rb8+ Kc6
{Draw by fifty-move rule} 1/2-1/2

regards
Andy



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