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Subject: a rare case of rybka losing because it doesn't recognize underpromotion

Author: Joseph Ciarrochi

Date: 13:06:51 01/03/06



game was 90 minutes with 30 sec increments. Fritz9 and rybka also disagree quite
frequently with the evaluation

[Event "rybka versus f9-2"]
[Site "?"]
[Date "2006.01.04"]
[Round "2.1"]
[White "Rybka 1.0 Beta 32-bit"]
[Black "Fritz 9"]
[Result "0-1"]
[ECO "B01"]
[Annotator "0.79;0.61"]
[PlyCount "136"]
[EventDate "2006.01.04"]
[EventType "tourn"]

{Intel(R) Pentium(R) M processor 2.00GHz 598 MHz  W=17.0 ply; 50kN/s  B=16.3
ply; 435kN/s; 1,700 TBAs} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bc4 c6
6. Nf3 Bf5 7. Bd2 e6 8. Ne4 Qc7 9. Nxf6+ gxf6 10. Qe2 Nd7 11. O-O-O O-O-O 12.
Nh4 Bg6 13. Bb3 c5 14. d5 Nb6 15. Nxg6 hxg6 16. Ba5 e5 17. h4 f5 18. c4 Bd6 19.
h5 {[%eval 79,15] [%emt 0:04:41]} Rh7 {(e4) [%eval 61,13] [%emt 0:02:55]} 20.
g4 {(hxg6) [%eval 92,13] [%emt 0:02:57]} Rdh8 {
(e4) [%eval 84,14] [%emt 0:03:47]} 21. gxf5 {(f3) [%eval 107,13] [%emt 0:01:20]
} Rxh5 {(gxh5) [%eval 47,15] [%emt 0:02:50]} 22. Rxh5 {
[%eval 106,15] [%emt 0:00:47]} gxh5 {[%eval 70,16] [%emt 0:05:06]} 23. Rh1 {
[%eval 113,17] [%emt 0:03:34]} h4 {[%eval 54,16] [%emt 0:04:49]} 24. Qg4 {
[%eval 99,16] [%emt 0:03:21]} Qd8 {[%eval 55,15] [%emt 0:03:15]} 25. f6+ {
(Bd2) [%eval 102,15] [%emt 0:02:15]} Kb8 {[%eval 25,16] [%emt 0:02:39]} 26.
Rxh4 {[%eval 96,16] [%emt 0:04:48]} Qxf6 {[%eval 36,15] [%emt 0:02:31]} 27.
Rxh8+ {[%eval 102,16] [%emt 0:04:00]} Qxh8 {[%eval 16,16] [%emt 0:06:43]} 28.
Bd1 {(Qf5) [%eval 105,16] [%emt 0:10:25]} Qh6+ {
(Qf6) [%eval 7,14] [%emt 0:02:30]} 29. Bd2 {[%eval 119,16] [%emt 0:02:02]} Qh7
{[%eval 25,15] [%emt 0:02:30]} 30. b3 {[%eval 121,16] [%emt 0:03:36]} e4 {
[%eval 23,15] [%emt 0:02:24]} 31. Qg5 {(Bc3) [%eval 115,15] [%emt 0:02:12]} f5
{[%eval 23,14] [%emt 0:02:10]} 32. Kc2 {(Qd8+) [%eval 108,14] [%emt 0:02:10]}
Qh3 {(Kc7) [%eval 36,14] [%emt 0:02:26]} 33. Be2 {[%eval 141,15] [%emt 0:02:42]
} Kc7 {(Nc8) [%eval 79,15] [%emt 0:05:37]} 34. Qg8 {
(Ba5) [%eval 144,15] [%emt 0:01:36]} Nc8 {[%eval 50,15] [%emt 0:02:44]} 35.
Qf7+ {[%eval 141,15] [%emt 0:02:57]} Kb8 {[%eval 52,16] [%emt 0:02:29]} 36. a3
{[%eval 141,15] [%emt 0:02:06]} a6 {(Bc7) [%eval 46,16] [%emt 0:03:16]} 37. Qd7
{(Qe6) [%eval 140,15] [%emt 0:01:57]} Be5 {[%eval 47,15] [%emt 0:02:30]} 38.
Qe6 {[%eval 139,15] [%emt 0:01:26]} Bc7 {(Bd6) [%eval 71,15] [%emt 0:04:11]}
39. Bc1 {[%eval 143,14] [%emt 0:01:18]} Qh7 {(a5) [%eval 38,14] [%emt 0:01:55]}
40. Qf6 {(Qh6) [%eval 128,13] [%emt 0:01:18]} Bd6 {[%eval 52,14] [%emt 0:04:04]
} 41. Be3 {[%eval 128,15] [%emt 0:03:14]} b6 {
(Qh1) [%eval 50,14] [%emt 0:02:30]} 42. a4 {(Bh6) [%eval 125,14] [%emt 0:02:02]
} Qd7 {(a5) [%eval 31,15] [%emt 0:03:31]} 43. Bd2 {
[%eval 132,15] [%emt 0:04:19]} Qh7 {(Kb7) [%eval 33,14] [%emt 0:02:52]} 44. a5
{(Bh6) [%eval 164,16] [%emt 0:01:42]} bxa5 {[%eval 39,15] [%emt 0:02:23]} 45.
Bxa5 {[%eval 164,16] [%emt 0:06:13]} Qd7 {(e3) [%eval 51,14] [%emt 0:01:14]}
46. Bd2 {(Bc3) [%eval 182,15] [%emt 0:01:22]} Qh7 {[%eval 58,14] [%emt 0:01:26]
} 47. Qe6 {(Be3) [%eval 182,15] [%emt 0:00:55]} Kb7 {
[%eval 46,15] [%emt 0:01:59]} 48. Bc3 {[%eval 180,14] [%emt 0:01:23]} Kb8 {
(Kc7) [%eval 55,15] [%emt 0:01:18]} 49. Ba5 {
(Kb2) [%eval 181,14] [%emt 0:01:08]} Qh2 {(Qh3) [%eval 14,15] [%emt 0:01:23]}
50. Qxf5 {[%eval 230,13] [%emt 0:00:27]} e3 {[%eval 18,15] [%emt 0:01:37]} 51.
Be1 {(Bc3) [%eval 227,13] [%emt 0:00:44]} Bf4 {
(Bc7) [%eval 22,14] [%emt 0:01:24]} 52. Qh5 {(d6) [%eval 246,14] [%emt 0:01:10]
} exf2 {[%eval -225,17] [%emt 0:01:27]} 53. Qxh2 {[%eval 223,14] [%emt 0:00:20]
} fxe1=N+ {(fxe1Q) [%eval -225,17] [%emt 0:00:49]} 54. Kd1 {
[%eval -279,19] [%emt 0:00:28]} Bxh2 {[%eval -233,18] [%emt 0:01:07]} 55. Kxe1
{[%eval -287,18] [%emt 0:00:22]} Nd6 {[%eval -236,17] [%emt 0:01:21]} 56. Kd2 {
[%eval -309,19] [%emt 0:01:27]} Nf5 {[%eval -243,16] [%emt 0:00:54]} 57. Bg4 {
(Bd1) [%eval -309,21] [%emt 0:01:37]} Nd4 {[%eval -247,17] [%emt 0:00:56]} 58.
Kc3 {[%eval -309,21] [%emt 0:00:53]} Bg3 {(a5) [%eval -246,17] [%emt 0:00:57]}
59. Bd1 {(Kb2) [%eval -309,20] [%emt 0:01:00]} Ka7 {
(Kc7) [%eval -241,16] [%emt 0:01:09]} 60. Kd3 {[%eval -309,22] [%emt 0:01:07]}
Be1 {(a5) [%eval -264,17] [%emt 0:00:42]} 61. Ke4 {
[%eval -309,19] [%emt 0:01:03]} Kb6 {[%eval -296,17] [%emt 0:00:59]} 62. Kd3 {
(Kf4) [%eval -309,22] [%emt 0:01:08]} Ka5 {(Kc7) [%eval -367,18] [%emt 0:01:09]
} 63. d6 {[%eval -386,19] [%emt 0:00:50]} Kb4 {
(Kb6) [%eval -417,18] [%emt 0:01:01]} 64. Ke4 {[%eval -395,18] [%emt 0:01:34]}
Nxb3 {[%eval -447,17] [%emt 0:01:14]} 65. d7 {[%eval -395,19] [%emt 0:01:09]}
Bh4 {[%eval -518,17] [%emt 0:00:50]} 66. d8=Q {[%eval -703,20] [%emt 0:05:56]}
Bxd8 {[%eval -703,16] [%emt 0:00:49]} 67. Bh5 {[%eval -1303,21] [%emt 0:03:30]}
a5 {[%eval -711,17] [%emt 0:00:52]} 68. Be8 {[%eval -1303,18] [%emt 0:00:44]}
a4 {[%eval -716,17] [%emt 0:00:44]} 0-1




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