Author: John Merlino
Date: 20:33:10 03/03/02
Go up one level in this thread
On March 03, 2002 at 21:31:16, Will Singleton wrote: >On March 03, 2002 at 17:49:16, John Merlino wrote: > >>On March 03, 2002 at 15:44:41, Jon Dart wrote: >> >>>Recently Arasan had this position against Gandalf on ICC: >>> >>>[D] 8/p5kp/1pBnP1p1/8/8/P3P3/4K2P/8 w - - >>> >>>Arasan played e7? here and lost. It had limited time here: it switches >>>off e7 pretty quickly, and prefers Kd3, but continues to give White a >>>positive score. >>> >>>On the other hand, a variety of other programs I've tried (Crafty, >>>Hiarcs 7, and Pharaon) play e4 here with a negative score for White. >>> >>>I'd be interested in any comments on this endgame. e7? is a loser, >>>but is Black still better if White avoids this? >>> >>>--Jon >> >>Here's what Chessmaster says: >> >>Time Depth Score Positions Moves >>0:00 5/6 0.29 11360 1.e4 Kf8 2.Kd3 Ke7 3.e5 Nf5 >>0:00 6/7 0.09 24852 1.e4 Kf8 2.Kd3 Ke7 3.e5 Nf5 4.Bd7 >> Ng7 >>0:00 7/8 0.22 59680 1.e4 Kf8 2.Kd3 Ke7 3.Bd7 b5 4.e5 >> Nc4 >>0:01 8/9 -0.26 156594 1.e4 Kf8 2.Kd3 Ke7 3.e5 Nf5 4.Bd7 >> Ng7 5.Ke4 Nxe6 >>0:02 8/9 -0.15 291263 1.Kd3 Kf6 2.Bd7 Ke7 3.Kd4 b5 4.Kd5 >> a5 5.Bc6 >>0:06 9/10 -0.12 658367 1.Kd3 Kf6 2.Bd7 Ke7 3.Kd4 Nf5+ >> 4.Ke4 b5 5.Ke5 Nxe3 6.Bxb5 Ng4+ >> 7.Kf4 Nxh2 >>0:12 10/11 -0.15 1465984 1.Kd3 Kf6 2.Bd7 Ke7 3.Kd4 h6 4.Kd5 >> b5 5.e4 a5 6.e5 >>0:25 11/12 -0.18 3282649 1.Kd3 Kf6 2.Bd7 Ke7 3.Kd4 Nf5+ >> 4.Ke4 h6 5.a4 a6 6.h3 b5 7.axb5 >> Nd6+ 8.Kd5 axb5 >>1:00 12/13 -0.18 7869328 1.Kd3 Kf6 2.Bd7 Ke7 3.Kd4 Nf5+ >> 4.Ke4 h6 5.a4 a6 6.h3 b5 7.axb5 >> Nd6+ 8.Kd5 axb5 >>2:16 13/14 -0.28 17722817 1.Kd3 Kf6 2.Bd7 Ke7 3.Kd4 Nf5+ >> 4.Ke4 a6 5.a4 b5 6.axb5 axb5 7.Kd3 >> Nd6 8.Kc3 h6 >>5:56 14/15 -0.30 46635573 1.Kd3 Kf6 2.Bd7 Ke7 3.Kd4 Nf5+ >> 4.Ke4 a6 5.a4 b5 6.axb5 axb5 7.Kd3 >> Nd6 8.Kc3 h6 9.Kb4 >> >>jm > >position after your line Kd3 Kf6 Bd7 Ke7 Kd4 Nf5+ >[D] 8/p2Bk2p/1p2P1p1/5n2/3K4/P3P3/7P/8 w - - > >Ke4 looks like the best move, but the score seems to go south for White soon >after. My program plays the line Kd5! NxP Kc6 (kb7 kxa7 etc) which seems to >draw. I wonder if it does draw, and if so, will any program play Kd5. > >Will > >ps: Jon, my prog plays Kd3 with a slight + for white, which goes negative after >awhile. After your position, CM8000 still likes Ke4: Time Depth Score Positions Moves 0:00 3/4 -0.10 1629 1.Ke4 Nd6+ 2.Kd5 b5 3.Bc6 a5 0:00 4/5 -0.12 5313 1.Ke4 b5 2.Ke5 Nxe3 3.Bxb5 Ng4+ 4.Kf4 Nxh2 0:00 5/6 -0.14 14011 1.Ke4 b5 2.Ke5 Nd6 3.Kd5 a5 0:00 6/7 -0.15 36030 1.Ke4 b5 2.Ke5 Nd6 3.Kd5 a5 4.Bc6 0:01 7/8 -0.13 118644 1.Ke4 Nd6+ 2.Kd5 b5 3.Kc5 a6 4.Kb6 Nc4+ 5.Kxa6 Nxa3 6.Bxb5 Kxe6 0:03 8/9 -0.34 300107 1.Ke4 Kd6 2.Kf4 Ng7 3.Kg5 Nxe6+ 4.Bxe6 Kxe6 5.Kh6 Ke7 6.Kxh7 g5 0:06 9/10 -0.30 745191 1.Ke4 a6 2.a4 b5 3.axb5 axb5 4.Kd3 Nd6 5.Kc3 h6 6.Kb4 0:14 10/11 -0.27 1642465 1.Ke4 a6 2.a4 h6 3.h3 b5 4.axb5 axb5 5.Kd3 Nd6 6.Kc3 g5 0:30 11/12 -0.33 3679209 1.Ke4 a6 2.a4 Kd6 3.Kf4 h6 4.Be8 Ne7 5.Bd7 Nd5+ 6.Kf3 Nf6 7.Bc8 1:40 12/13 -0.30 12335386 1.Ke4 a6 2.h3 h6 3.a4 Kd6 4.Be8 Ng7 5.Bxg6 Nxe6 6.Kf3 Nc5 7.Bc2 Ke5 3:58 13/14 -0.33 29553878 1.Ke4 Kd6 2.Kf4 h6 3.Be8 Ne7 4.Bf7 a5 5.Ke4 b5 6.Kd3 b4 7.axb4 axb4 8.Kc2 After forcing Kd5, it says: Time Depth Score Positions Moves 0:00 3/4 -0.78 4490 1...Nxe3+ 2.Kd4 Nf5+ 3.Kd5 Nd6 4.Bc6 a6 0:00 4/5 -0.86 10247 1...Nxe3+ 2.Kd4 Ng4 3.h3 Nf6 4.Bc8 0:00 5/6 -0.82 20284 1...Nxe3+ 2.Kd4 Ng4 3.h3 Nf6 4.Bc8 h6 5.Ke5 0:01 6/7 -0.86 89455 1...Nxe3+ 2.Kc6 Nc4 3.a4 Nd6 4.h3 h6 5.Kd5 a6 0:03 7/8 -0.91 268628 1...Nxe3+ 2.Kd4 Nf5+ 3.Kd5 Nd6 4.Bc6 b5 5.h3 g5 6.Bd7 a5 7.Bc6 0:05 8/9 -0.92 569074 1...Nxe3+ 2.Kc6 Nc4 3.a4 Nd6 4.Kc7 g5 5.Kc6 h5 6.Kd5 a6 0:10 9/10 -1.42 1181683 1...Nxe3+ 2.Kc6 Nc4 3.Kb7 Nxa3 4.Kxa7 b5 5.Kb6 b4 6.Kc5 b3 7.Kd4 0:16 10/11 -1.09 1958586 1...Nxe3+ 2.Kc6 Nc4 3.a4 Ne5+ 4.Kc7 g5 5.Bc8 g4 6.Kb8 a6 7.Kc7 b5 0:31 11/12 -1.21 3875436 1...Nxe3+ 2.Kc6 Nc4 3.a4 Ne5+ 4.Kc7 h5 5.Bc8 Nf3 6.Kb7 Nxh2 7.Kxa7 Nf3 8.Kxb6 1:18 12/13 -1.21 9869253 1...Nxe3+ 2.Kc6 Nc4 3.a4 Ne5+ 4.Kc7 h5 5.h4 a5 6.Bc8 Nf3 7.Kxb6 Nxh4 8.Kxa5 Nf3 9.Kb6 3:26 13/14 -1.45 26172248 1...Nxe3+ 2.Kc6 Ng4 3.h3 Ne5+ 4.Kc7 g5 5.Bb5 Kxe6 6.Kb7 Kd5 7.Kxa7 Kc5 8.Be2 b5 9.Ka6 Nc4 ....doesn't look good.... jm
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