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Subject: Another Shredder draw bug?

Author: James T. Walker

Date: 05:16:24 12/10/03


Here is a game between Shredder 7.04 (Classic) and Junior 8.  I think it's
another bug by Shredder concerning draw rules.  The last pawn move is by
Shredder at move 80.(h7).  So at move 130 Shredder thinks it's 50th move is a
draw and plays Rh5.  This move allows Junior to capture the rook on Junior's
50th move.  This allows an immediate tablebase mate score.  Am I wrong?

[Event "Blitz:5'/XP2400+"]
[Site "?"]
[Date "2003.12.10"]
[Round "28"]
[White "Shredder 7.04C"]
[Black "Junior 8"]
[Result "0-1"]
[ECO "C92"]
[PlyCount "262"]
[EventDate "2003.12.07"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Bb7 10. d4 Re8 11. Nbd2 Bf8 12. d5 Nb8 13. Nf1 Nbd7 14. Ng3 Nc5 15.
Bc2 c6 16. b4 Ncd7 17. dxc6 Bxc6 18. Bb3 h6 19. Nh2 Nb6 20. Ng4 Nc4 21. a4 Nxg4
22. Qxg4 g6 23. axb5 axb5 24. Rxa8 Qxa8 25. Bxc4 bxc4 26. Qh4 h5 27. f3 Qa2 28.
Qg5 Be7 29. Qe3 Qc2 30. Bd2 Bh4 31. Rc1 Qa2 32. Nf1 Ra8 33. Be1 Be7 34. Qb6 Qa7
35. Qxa7 Rxa7 36. Rd1 Bb5 37. Ne3 Kf8 38. Kf1 Bg5 39. Rd5 Bxe3 40. Rxb5 Ra2 41.
Rb7 Ke8 42. Rc7 Rb2 43. g4 Bf4 44. Rxc4 Kd7 45. b5 Rxb5 46. Rb4 Ra5 47. gxh5
gxh5 48. Rb8 Ra2 49. Rh8 Ke6 50. Rxh5 d5 51. exd5+ Kxd5 52. Rh7 f5 53. h4 e4
54. fxe4+ fxe4 55. Rf7 Ke5 56. Re7+ Kf5 57. Rg7 e3 58. Rg2 Ra1 59. Re2 Kg4 60.
Kg2 Rc1 61. Bf2 exf2 62. Rxf2 Rxc3 63. h5 Bh6 64. Rf6 Rc2+ 65. Rf2 Rc5 66. Rf6
Bg5 67. Rf7 Rc2+ 68. Rf2 Rc7 69. h6 Rh7 70. Re2 Kf5 71. Kf3 Bf4 72. Re1 Bd2 73.
Re2 Bg5 74. Re8 Bf6 75. Rg8 Bc3 76. Rg2 Be5 77. Rg4 Ra7 78. Rh4 Kg5 79. Rh1 Kg6
80. h7 Bh8 81. Kg4 Rc7 82. Rh2 Rc3 83. Kf4 Kf6 84. Ke4 Rg3 85. Rh6+ Kg5 86. Rh2
Rg1 87. Kd3 Kg6 88. Rh4 Rg5 89. Rh1 Rg4 90. Ke2 Rg3 91. Rh4 Rg5 92. Rh2 Kg7 93.
Ke3 Rg1 94. Rh4 Rg6 95. Rh1 Re6+ 96. Kf3 Re7 97. Kg4 Rf7 98. Kg5 Ra7 99. Rh2
Ra5+ 100. Kg4 Kg6 101. Rh3 Rb5 102. Kf4 Rg5 103. Ke4 Rg1 104. Kd5 Rd1+ 105. Ke6
Re1+ 106. Kd6 Rf1 107. Rh4 Kf7 108. Kc6 Rc1+ 109. Kd5 Rd1+ 110. Kc4 Rd7 111.
Rh3 Kf6 112. Kc5 Ra7 113. Rh6+ Kg5 114. Rh3 Kg6 115. Kd5 Ra5+ 116. Kd6 Ra6+
117. Kd5 Ra7 118. Ke6 Ra1 119. Kd7 Rg1 120. Rh4 Rd1+ 121. Kc6 Rc1+ 122. Kd6 Kg7
123. Ke6 Rg1 124. Kf5 Rf1+ 125. Ke4 Rf7 126. Rh3 Kg6 127. Kd5 Rd7+ 128. Ke6 Rd1
129. Rh2 Rd8 130. Rh5 Kxh5 131. Kf7 Rd2 0-1

Jim



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