Author: John Merlino
Date: 13:23:53 09/20/02
Go up one level in this thread
On September 20, 2002 at 14:18:38, John Merlino wrote: >On September 20, 2002 at 13:30:09, Gian-Carlo Pascutto wrote: > >>[D]4b3/6p1/5p1p/5P1P/3kPK2/1p6/1P2B3/8 b - - 0 1 >> >>My engine just managed to lose what looked like a dead-drawn >>endgame against a Crafty clone on ICC. I couldn't understand >>what happened. I still don't know exactly, but it looks like >>some kind of hashing/draw-by-rep/nullmove artifact ;) >> >>But my program doesn't seem to be the only one that >>gets funny on this position: > >Here's what Chessmaster 9000 says on this position. Not sure if it is also >"funny": > >Time Depth Score Positions Moves >0:00 3/7 -0.38 4743 1...Bc6 2.Bd1 Ba4 3.Be2 Be8 4.Bf3 > Bb5 >0:00 4/8 -0.36 10780 1...Bc6 2.Bd1 Ba4 3.Kf3 Ke5 4.Ke3 > Be8 5.Bxb3 Bxh5 >0:00 4/8 -0.43 19865 1...Bf7 2.Bd1 Bc4 3.Bg4 Bd3 4.Bd1 > Bc2 5.Bf3 >0:00 5/9 -0.44 26752 1...Bf7 2.Bd1 Kd3 3.e5 fxe5+ 4.Kxe5 > Kd2 5.f6 Kxd1 6.fxg7 Bg8 >0:00 6/10 -0.69 67861 1...Bf7 2.Bf3 Kd3 3.e5 fxe5+ 4.Kxe5 > Kc2 5.f6 gxf6+ 6.Kxf6 Kxb2 7.Kxf7 > Kc2 >0:01 6/10 -1.48 98615 1...Ba4 2.Bf1 Bc6 3.Be2 Bxe4 4.Bb5 > Bd3 5.Be8 Bc4 6.Bc6 Be2 >0:01 7/11 -0.97 152287 1...Ba4 2.Bf3 Kd3 3.e5 Kc2 4.e6 > Kxb2 5.Be4 Be8 6.Ke3 Bxh5 7.Kd4 >0:02 8/12 -1.21 242560 1...Ba4 2.Bf3 Kd3 3.e5 Kc2 4.e6 > Kxb2 5.Be4 Be8 6.Ke3 Kc3 7.Bf3 >0:05 9/13 -1.41 531277 1...Ba4 2.Bf3 Kd3 3.e5 Kc2 4.e6 > Kxb2 5.Be4 Ka1 6.Ke3 b2 7.Kd4 Be8 > 8.Kc5 Bxh5 >0:09 10/14 -1.21 969537 1...Ba4 2.Bf3 Kd3 3.e5 Kc2 4.e6 > Kxb2 5.Ke4 Kc1 6.Kd5 b2 7.Be4 Bb3+ > 8.Kd6 Bc2 9.Bxc2 Kxc2 >0:22 11/15 -1.41 2239357 1...Ba4 2.Kf3 Bc6 3.Kf4 Bxe4 4.Bb5 > Bd3 5.Be8 Bc4 6.Bd7 Kd5 7.Be6+ > Kc5 8.Bc8 Kd6 9.Bb7 Bd3 >0:40 12/16 -1.52 4027500 1...Ba4 2.Kf3 Bc6 3.Kf4 Bxe4 4.Bb5 > Bc2 5.Be2 Bd3 6.Bf3 Bc4 7.Bg4 Bd5 > 8.Bd1 Kd3 9.Bg4 >1:52 13/17 -1.54 11346643 1...Ba4 2.Bd1 Kd3 3.e5 Kd2 4.Bf3 > Kc2 5.e6 Kxb2 6.Kg4 Kc1 7.Be4 b2 > 8.Kh4 Bc6 9.Bd3 b1=Q 10.Bxb1 Kxb1 >3:58 14/18 -1.56 23785267 1...Ba4 2.Bd1 Kd3 3.e5 Kd2 4.Bf3 > Kc2 5.e6 Kxb2 6.Kg3 Kc1 7.Be4 b2 > 8.Kh4 Bc6 9.Bd3 b1=Q 10.Bxb1 Kxb1 > 11.Kg4 > >jm Here's what my wonderful new P4-2.66 says: Time Depth Score Positions Moves 0:00 6/10 -0.69 67114 1...Bf7 2.Bf3 Kd3 3.e5 fxe5+ 4.Kxe5 Kc2 5.f6 gxf6+ 6.Kxf6 Kxb2 7.Kxf7 Kc2 0:00 6/10 -1.48 101882 1...Ba4 2.Bf1 Bc6 3.Be2 Bxe4 4.Bb5 Bd3 5.Ba4 Bc4 6.Bc6 Be2 0:00 7/11 -1.24 154064 1...Ba4 2.Bf3 Kd3 3.e5 Kc2 4.Be4+ Kxb2 5.e6 Kc1 6.Ke3 b2 7.Kd4 b1=Q 8.Bxb1 Kxb1 0:00 8/12 -1.11 243418 1...Ba4 2.Bf3 Kd3 3.e5 Kc2 4.e6 Kxb2 5.Ke4 Kc1 6.Kd5 b2 7.Be4 b1=Q 8.Bxb1 Kxb1 0:01 9/13 -1.37 551010 1...Ba4 2.Bd1 Kd3 3.e5 Kd2 4.Bg4 Kc2 5.e6 Kxb2 6.Ke4 Kc2 7.Be2 Bc6+ 8.Kd4 b2 0:02 10/14 -1.21 1056757 1...Ba4 2.Bf3 Kd3 3.e5 Kc2 4.e6 Kxb2 5.Ke4 Kc1 6.Kd5 b2 7.Be4 Bb3+ 8.Kd6 Bc2 9.Bxc2 Kxc2 0:05 11/15 -1.39 2150529 1...Ba4 2.Kf3 Bc6 3.Kf4 Bxe4 4.Bb5 Bd5 5.Bd7 Bc4 6.Be8 Kc5 7.Ke3 Bg8 8.Bg6 Bd5 0:10 12/16 -1.51 3730489 1...Ba4 2.Kf3 Bc6 3.Kf4 Bxe4 4.Bb5 Bd5 5.Bd7 Bc4 6.Bc6 Bf7 7.Bf3 Bd5 8.Be2 Bc4 9.Bf3 Bd3 0:24 13/17 -1.56 9124305 1...Ba4 2.Bd1 Kd3 3.e5 Kd2 4.Bf3 Kc2 5.Be4+ Kxb2 6.e6 Kc1 7.Kg4 b2 8.Kh4 Bc6 9.Bd3 b1=Q 10.Bxb1 Kxb1 11.Kg4 0:42 14/18 -1.56 16053836 1...Ba4 2.Bd1 Kd3 3.e5 Kd2 4.Bf3 Kc2 5.e6 Kxb2 6.Kg3 Kc1 7.Be4 b2 8.Kh4 Bc6 9.Bd3 b1=Q 10.Bxb1 Kxb1 11.Kg4 1:20 15/19 -1.61 29921228 1...Ba4 2.Bd1 Kd3 3.e5 Kd2 4.Bf3 Kc2 5.e6 Kxb2 6.Kg3 Be8 7.Kg4 Kc3 8.Be4 Kd4 9.Bb1 Ke5 10.Kh4 Kd6 11.Be4 2:39 16/20 -1.64 57836732 1...Ba4 2.Bd1 Kd3 3.e5 Kd2 4.Bf3 Kc2 5.e6 Kxb2 6.Kg3 Kc1 7.Be4 b2 8.Kh4 b1=Q 9.Bxb1 Kxb1 10.Kg4 Kc1 11.Kh4 Kd2 12.Kg4 6:39 17/21 -2.08 139326723 1...Ba4 2.Bd1 Kd3 3.e5 Kd2 4.Bf3 Kc2 5.e6 Kxb2 6.Kg3 Ka1 7.Be4 b2 8.Kg4 Bd1+ 9.Kh4 b1=Q 10.Bxb1 Kxb1 11.e7 Ba4 12.Kh3 Be8 13.Kg4 Kc2 14:31 18/22 -2.23 297884319 1...Ba4 2.Bd1 Kd3 3.e5 Kd2 4.Bf3 Kc2 5.e6 Kxb2 6.Kg3 Kc1 7.Be4 b2 8.Kh4 Bc2 9.Bxc2 Kxc2 10.e7 b1=Q 11.e8=Q Qh1+ 12.Kg3 Qg1+ 13.Kh3 Qf1+ 14.Kg3 Qxf5 15.Qe2+ Kc3 16.Qe3+ Kc4 So, does Black really have a win here? jm
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