Author: Uri Blass
Date: 08:48:23 02/16/03
Go up one level in this thread
On February 16, 2003 at 11:14:56, Uri Blass wrote: >On February 16, 2003 at 11:01:49, Roy Brunjes wrote: > >> >>In a game between Fritz 8 and a custom personality of mine for CM9000, the >>following position arose in a 15/10 game: >> >>[D] 5Q2/8/2p4k/1p1pP3/8/6KP/8/q7 b - - 0 45 >> >>Black here should easily draw with ... Kh7. Fritz 8 thinks for almost 30 >>seconds on my Athlon 700 MHz machine and plays ... Kh5 and scores the position >>as 0.00 expecting a draw. >> >>CM9000 immediately shows evals nearly one pawn in its favor and after a few more >>moves, Fritz shows an eval of more than 4 pawns in White's favor. >> >>Curious that Fritz would err so greatly in a simple position. Is it a bug or is >>it explainable some other way? > >No bug >Movei like many other programs also evaluates the position after Kh7 as 0.00 > >The "bug" is in chessmaster that did not know that it is a draw and won the >game. >CM9000 for some reason does not know to count material and cannot see that black >is a pawn up. > >It evaluates the unstoppable passed pawn as clearly more than one pawn. >Chessmaster "suffers" from that "bug" for year and this is one of the reasons >that it is a good program. > >Uri Here is some analysis of some programs after Kh5 You can see that the fact that chessmaster can see a big advantage immediately is an exception to the rule that most programs do not know it by evaluation. CM9000 Junior3 500MHz 32MB has - Fritz 8 700MHz 128MB hash [D]5Q2/8/2p5/1p1pP2k/8/6KP/8/q7 w - - 0 1 Analysis by Crafty 19.01: 46.e6 ³ (-0.45) Depth: 1/4 00:00:00 46.e6 Qe5+ 47.Qf4 Qxe6 -+ (-2.88) Depth: 2/6 00:00:00 46.Qe8+ Kg5 47.e6 ³ (-0.65) Depth: 2/6 00:00:00 46.Qf5+ = (-0.05) Depth: 2/6 00:00:00 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 2/6 00:00:00 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 3/8 00:00:00 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 4/10 00:00:00 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 5/12 00:00:00 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 6/14 00:00:00 10kN 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 7/14 00:00:00 27kN 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 8/16 00:00:00 84kN 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 9/18 00:00:01 211kN 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 10/23 00:00:02 675kN 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 11/25 00:00:04 1536kN, tb=1 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 12/27 00:00:09 3617kN, tb=1 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 13/30 00:00:22 9624kN, tb=9 46.Qf5+ Kh6 47.Qf8+ = (0.00) Depth: 14/32 00:01:01 27599kN, tb=26 46.Qe8+ Kg5 47.h4+ Kf5 48.Qf7+ Ke4 49.e6 Qg1+ 50.Kh3 Qh1+ 51.Kg4 Qd1+ 52.Kg5 Qd2+ 53.Kg6 Qg2+ 54.Kh7 Ke3 55.e7 Qe4+ 56.Kg8 Qg4+ 57.Kf8 = (0.17) Depth: 14/32 00:01:36 44171kN, tb=157 46.Qe8+ Kg5 47.h4+ Kf5 48.Qf7+ Ke4 49.e6 Qg1+ 50.Kh3 Qh1+ 51.Kg4 Qd1+ 52.Kg5 Qd2+ 53.Kg6 Qg2+ 54.Kh7 Ke3 55.e7 Qe4+ 56.Kg8 Qg4+ 57.Kf8 ² (0.57) Depth: 15/36 00:02:23 67283kN, tb=415 46.Qe8+ Kh6 47.Qxc6+ Kg7 48.Qf6+ Kg8 49.Qd8+ Kg7 50.Qg5+ Kf7 51.Qf5+ Kg7 52.e6 Qg1+ 53.Kh4 Qe1+ 54.Kg4 Qd1+ 55.Kf4 Qd4+ 56.Kf3 Qd1+ 57.Ke3 d4+ ± (0.91) Depth: 15/36 00:08:41 240627kN, tb=819 (Blass, Tel-Aviv 16.02.2003) CM9000 Junior3 500MHz 32MB has - Fritz 8 700MHz 128MB hash 5Q2/8/2p5/1p1pP2k/8/6KP/8/q7 w - - 0 1 Analysis by Yace 0.99.56: 46.e6 -+ (-1.57) Depth: 1 00:00:03 46.Qe8+ Kh6 -+ (-1.52) Depth: 1 00:00:03 46.Qe8+ Kg5 47.Qxc6 Qxe5+ 48.Kf3 µ (-1.18) Depth: 1 00:00:03 46.Qe8+ Kg5 47.Qxc6 Qxe5+ 48.Kf3 µ (-1.18) Depth: 2 00:00:03 46.Qh8+ Kg5 47.Qf6+ Kh5 48.Qh8+ = (0.00) Depth: 2 00:00:03 46.Qh8+ Kg5 47.Qf6+ Kh5 48.Qh8+ Kg5 = (0.00) Depth: 2 00:00:03 46.Qh8+ Kg6 47.Qf6+ Kh7 = (0.00) Depth: 3 00:00:03 46.Qh8+ Kg6 47.Qf6+ Kh7 = (0.00) Depth: 5 00:00:03 17kN 46.Qh8+ Kg6 47.Qf6+ Kh7 = (0.00) Depth: 6 00:00:03 41kN 46.Qh8+ Kg6 47.Qf6+ Kh7 = (0.00) Depth: 7 00:00:03 131kN 46.Qh8+ Kg6 47.Qf6+ Kh7 = (0.00) Depth: 8 00:00:04 383kN 46.Qe8+ Kg5 47.h4+ Kf5 48.Qf7+ Ke4 49.e6 Qg1+ 50.Kh3 d4 51.e7 Qe3+ 52.Kg4 Qe2+ 53.Kg5 Qe3+ 54.Kf6 Qf4+ 55.Ke6 b4 56.e8Q b3 = (0.01) Depth: 11 00:00:47 17322kN (Blass, Tel-Aviv 16.02.2003) CM9000 Junior3 500MHz 32MB has - Fritz 8 700MHz 128MB hash 5Q2/8/2p5/1p1pP2k/8/6KP/8/q7 w - - 0 1 Analysis by Comet B55: 46.Qh8+ Kg5 -+ (-2.54) Depth: 1/3 00:00:00 46.Qe8+ Kg5 47.Qxc6 Qxe5+ µ (-1.30) Depth: 1/6 00:00:00 46.Qf5+ Kh6 µ (-0.89) Depth: 1/6 00:00:00 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 2/8 00:00:00 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 2/10 00:00:00 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 3/10 00:00:00 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 3/15 00:00:00 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 4/15 00:00:00 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 4/15 00:00:00 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 5/15 00:00:00 15kN, tb=4 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 5/15 00:00:00 18kN, tb=4 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 6/15 00:00:00 29kN, tb=4 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 6/17 00:00:00 61kN, tb=9 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 7/17 00:00:00 82kN, tb=11 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 7/20 00:00:01 211kN, tb=22 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 8/21 00:00:02 419kN, tb=38 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 8/21 00:00:02 558kN, tb=48 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 9/24 00:00:03 909kN, tb=77 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 9/24 00:00:04 1207kN, tb=92 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 10/24 00:00:07 1944kN, tb=214 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 10/24 00:00:09 2605kN, tb=240 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 11/25 00:00:12 3608kN, tb=323 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 11/26 00:00:16 4744kN, tb=430 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 12/28 00:00:24 7142kN, tb=722 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 12/28 00:00:33 9714kN, tb=929 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 13/30 00:00:51 14667kN, tb=1557 46.Qf5+ Kh6 47.Qf6+ Kh7 = (0.00) Depth: 13/30 00:01:08 19646kN, tb=2051 (Blass, Tel-Aviv 16.02.2003) CM9000 Junior3 500MHz 32MB has - Fritz 8 700MHz 128MB hash 5Q2/8/2p5/1p1pP2k/8/6KP/8/q7 w - - 0 1 Analysis by Junior 7: 46.e6 Qg1+ 47.Kf4 Qf2+ 48.Ke5 Qxf8 -+ (-7.05) Depth: 3 00:00:00 46.h4 Qxe5+ 47.Qf4 Qxf4+ 48.Kxf4 Kxh4 -+ (-2.30) Depth: 3 00:00:00 46.Qb4 Qxe5+ 47.Qf4 Qc3+ 48.Kh2 -+ (-1.79) Depth: 3 00:00:00 1kN 46.Qd6 Qg1+ 47.Kf3 Qf1+ 48.Kg3 µ (-0.99) Depth: 3 00:00:00 1kN 46.Qf3+ Kg6 47.Qf6+ Kh7 48.Kf4 ³ (-0.27) Depth: 3 00:00:00 2kN 46.Qf5+ Kh6 = (0.00) Depth: 3 00:00:00 2kN 46.Qf5+ Kh6 = (0.00) Depth: 6 00:00:00 10kN 46.Qf5+ Kh6 = (0.00) Depth: 9 00:00:00 224kN 46.Qf5+ Kh6 = (0.00) Depth: 12 00:00:03 3116kN, tb=76 46.Qf5+ Kh6 = (0.00) Depth: 14 00:00:20 18212kN, tb=983 (Blass, Tel-Aviv 16.02.2003)
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.