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Subject: Re: What's your programs worst ever move ?

Author: Thomas McBurney

Date: 09:36:11 08/30/03

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My chess engine Kanguruh seems to have a special talent for losing games when it
is out in front by a healthy margin.  In the game below, Kanguruh was winning by
a score of +8.00 then proceeds to lose the game.  I haven't analysed the game
yet, so there maybe bugs that caused the loss.


[Event "ICS rated standard match"]
[Site "freechess.org"]
[Date "2003.08.29"]
[Round "-"]
[White "OldBlindDog"]
[Black "kanguruh"]
[Result "1-0"]
[WhiteElo "2282"]
[BlackElo "1996"]
[TimeControl "900"]

1. d4 Nf6 2. Nf3 e6 3. c4 Bb4+ 4. Bd2 a5 5. g3 d5 6. Qc2 Nc6 7. Bg2 dxc4 8.
Qxc4 Qd5 9. Qd3 O-O 10. Nc3 Qh5 11. Ng5 Bxc3 12. bxc3 Ne7 13. Rb1 h6 14.
Ne4 Nfd5 15. f4 b6 16. c4 Ba6 17. Nf2 f5 18. Qb3 Nc6 19. Bf3 Qg6 20. cxd5
Nxd4 21. Qc3 Nxf3+ 22. Qxf3 Bb7 23. Qc3 Bxd5 24. O-O Bxa2 25. Rb2 Bd5 26.
Qxc7 a4 27. Rxb6 a3 28. Bb4 Rfc8 29. Qe5 a2 30. Ra1 Kh7 31. Nd3 Rc2 32. Ne1
Rc4 33. Bd6 Re4 34. Qb2 Qg4 35. Nf3 Re3 36. Qd2 Rxf3 37. exf3 Qxf3 38. Qb2
Rc8 39. Be5 Qh1+ 40. Kf2 Rc2+ 41. Qxc2 Qxh2+ 42. Ke3 Qxc2 43. Rb8 Qg2 44.
Kd4 Qf2+ 45. Kd3 Qxg3+ 46. Kd2 g5 47. Rh8+ Kg6 48. Rg8+ Kh5 49. Re1 Bf3 50.
Ra1 Qf2+ 51. Kd3 Qe2+ 52. Kc3 Qe3+ 53. Kb2 Qf2+ 54. Kc3 Qc5+ 55. Kb2 Bd5
56. Rc1 Qe3 57. Rgc8 Qb6+ 58. Ka1 gxf4 59. Bb2 f3 60. Rh1+ Kg5 61. Rg8+ Kf4
62. Re1 Be4 63. Bc1+ Ke5 64. Bb2+ Kd6 65. Rd1+ Bd5 66. Rc8 f2 67. Rcc1 f1=N
68. Rxf1 Bg2 69. Ba3+ Kd7 70. Rg1 Qf2 71. Bc5 Qe2 72. Rce1 Qc2 73. Rc1 Qe2
74. Rce1 Qc2 75. Rc1 Qe4 76. Kxa2 Qa4+ 77. Kb2 Qb5+ 78. Ka1 Qa5+ 79. Kb2
Qb5+ 80. Ka1 Qa5+ 81. Kb2 Be4 82. Rg7+ Ke8 83. Rc3 Qb5+ 84. Rb3 Qe2+ 85.
Ka3 Qa6+ 86. Kb2 Qe2+ 87. Ka3 Qa6+ 88. Kb2 Bb7 89. Rbxb7 Qe2+ 90. Ka3 Qd3+
91. Kb4 Qd2+ 92. Kb5 Qd3+ 93. Kb6 Qd8+ 94. Ka6 Qa8+ 95. Kb5 Qxb7+ 96. Rxb7
Kd8 97. Re7 f4 98. Kc6 f3 99. Rf7 e5 100. Rf8#
{kanguruh checkmated} 1-0



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