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Subject: What does your engine play in this position?

Author: Mikael Bäckman

Date: 05:26:49 09/20/03

This position occured in a 15 min game chepla-nullmover.

[D]r1b1kb1r/1p3ppp/p2pp3/q1pNn2Q/2B5/PP6/2PP1PPP/R1B1R1K1 w kq - 0 14

Cheplas postgame analysis:

   1.10      324   0.0 Rxe5 1/5
   1.10      368   0.0 Rxe5 dxe5 2/5
   1.10       1k   0.0 Rxe5 dxe5 Qxe5 3/8
   0.77       3k   0.0 Rxe5 4/7
   0.77      15k   0.1 Rxe5? 4/2
   0.48      16k   0.1 Rxe5 dxe5 Qxe5 Qd8 4/10
   0.78      21k   0.1 Rxe5 dxe5 Qxe5 Qd8 Bb2 5/13
   0.99      88k   0.3 Rxe5 dxe5 Qxe5 Ra7 b4 Qa4 6/18
   0.70     232k   0.6 Rxe5 dxe5 Qxe5 f6 Nxf6+ gxf6 Qxf6 Rg8 7/17
   0.51     822k   2.2 Rxe5 dxe5 Qxe5 Kd8 b4 f6 Qb2 Qa4 8/22
   0.57    2272k   6.2 Rxe5 dxe5 Qxe5 Kd8 b4 f6 Qb2 Qa4 Nb6 9/23
   0.52    5529k  15.2 Rxe5 dxe5 Qxe5 Kd7 Ne3 Qc7 Bb2 Qxe5 Bxe5 Ke8 10/25
   0.77   16418k  46.1 Rxe5 dxe5 Qxe5 Kd7 d4 Bd6 Qxg7 exd5 Qxh8 dxc4 Qxh7 11/29
   0.89   25879k  73.1 Rxe5 dxe5 Qxe5 Kd7 d4 Bd6 Qxg7 exd5 Qxf7+ Be7 Qxd5+ Ke8
   1.22   70744k  219.6 Rxe5! 13/33

If you look at the lines you'll see that I have (chepla has) a big bug
somewhere.. but is Rxe5 really good as it seems?



Here's the full game:

[Event "Computer chess game"]
[Site "AMD1200"]
[Date "2003.09.20"]
[Round "3"]
[White "Chepla v0.13"]
[Black "Nullmover 0.20h"]
[Result "1/2-1/2"]
[TimeControl "900+1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 Nf6 4. e5 Ng4 5. O-O Ngxe5 6. Nxe5 Nxe5 7. Qh5
Qb6 8. Nc3 Nc6 9. Nd5 Qa5 10. Re1 a6 11. Bc4 e6 12. a3 d6 13. b3 Ne5 14.
Rxe5 dxe5 15. Qxe5 Kd7 16. d4 b5 17. dxc5 Bxc5 18. b4 Bd6 19. Qxg7 Qd8 20.
Bg5 Qf8 21. Nb6+ Kc6 22. Qd4 Rb8 23. Nxc8 Qxc8 24. Bd3 f5 25. c4 Qd7 26.
cxb5+ axb5 27. Rc1+ Kb7 28. g3 Rhc8 29. Re1 Rc7 30. Bxb5 Qxb5 31. Qxd6 Re8
32. Bf6 Rd7 33. Qf4 Rd3 34. Bb2 Ka8 35. Qc1 Qa6 36. Qc5 Red8 37. b5 Qd6 38.
Qc4 Rd1 39. Bc3 Rxe1+ 40. Bxe1 e5 41. a4 e4 42. a5 Qd5 43. Qa4 Qd1 44. Qxd1
Rxd1 45. Kf1 Rb1 46. b6 Rb2 47. h4 h5 48. Bc3 Rc2 49. Bb4 Rb2 50. Bc3 Rc2
51. Bb4 Rb2 52. Be1 Ra2 53. Kg1 Ra1 54. Kf1 Ra2 55. Kg2 e3 56. Kf3 exf2 57.
Bxf2 Rxa5 58. Kf4 Kb7 59. Kg5 Kc6 60. Kxh5 Ra3 61. Kg5 Rf3 62. Be1 Re3 63.
Bf2 Rf3 64. Be1 Re3 65. Bd2 Rxg3+ 66. Kf4 Rh3 67. Be3 Kd6 68. Bf2 Rh1 69.
Kg5 Rf1 70. Bg3+ Kc6 71. Bc7 f4 72. h5 f3 73. Kf4 Rh1 74. Kxf3 Rxh5 75. Ke2
Rb5 76. Kd2 Kd5 77. Kc2 Kc4 78. Kd2 Rb4 79. Ke3 Kd5 80. Kd2 Kd4 81. Kc2 Rb5
82. Kd2 Rb3 83. Kc2 Rb4 84. Kd2 Rb5 85. Kc2 Kd5 86. Kd2 Rb3 87. Kc2 Kc4 88.
Kd2 Rb5 89. Kc2 Rb4 90. Bd8 Kd5 91. Kd2 Rd4+ 92. Kc3 Rc4+ 93. Kb3 Rc1 94.
Kb2 Rc5 95. Bc7 Rc4 96. Ka3 Kc6 97. Kb3 Rc5 98. Kb4 Rc1 99. Kb3 Kd5 100.
Kb4 Rd1 101. Kc3 Kc6 102. Kc4 Rd2 103. Kc3 Re2 104. Bd8 Re8 105. Bc7 Re3+
106. Kc4 Rf3 107. Bd8 Rf4+ 108. Kc3 Kc5 109. Bc7 Rf3+ 110. Kc2 Kc6 111. Bd8
Rg3 112. Bc7 Rh3 113. Bd8 Re3 114. Bc7 Ra3 115. Kd2 Rf3 116. Ke2 Rh3 117.
Kd2 Ra3 118. Ke2 Rc3 119. Kd2 Rb3 120. Kc2 Re3 121. Kd2 Re8 122. Kd3 Kb7
123. Kd4 Ka6 124. Kd5 Kb5
{Chepla_v0.13: Draw by 50} 1/2-1/2



/Mikael

Re: What does your engine play in this position? John Merlino 09:01:22 09/20/03
Re: What does your engine play in this position? John Merlino 08:55:33 09/20/03
Re: What does your engine play in this position? Tord Romstad 08:02:04 09/20/03
- Re: What does your engine play in this position? Uri Blass 09:09:05 09/20/03
- Re: What does your engine play in this position? Mikael Bäckman 09:07:36 09/20/03
Re: What does your engine play in this position? Mike Byrne 07:20:35 09/20/03
Re: What does your engine play in this position? Uri Blass 05:56:38 09/20/03

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