Author: Uri Blass
Date: 16:23:28 08/04/05
Go up one level in this thread
On August 04, 2005 at 18:24:58, George Tsavdaris wrote: >One of Shredder weak points is some wrong-color-Bishop endgames. It is not a weakness of shredder but weakness of most chess programs in case that it is a draw and white cannot force black to play b5 later and win by axb5 It is not obvious for me that it is impossible without analysis so it is not obvious for me that it is a draw. I tried the second best program in the world(Fruit2.1) New game, 8/8/8/pp6/1P2k3/P1K5/5Bp1/8 w - - 0 1 Analysis by Fruit 2.1: 1.bxa5 +- (1.87) Depth: 1/1 00:00:00 1.bxa5 Kd5 +- (1.86) Depth: 2/7 00:00:00 1.bxa5 Kd5 2.a6 +- (2.48) Depth: 3/7 00:00:00 1.bxa5 Kd5 2.a6 Kc6 +- (2.63) Depth: 4/7 00:00:00 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 +- (2.93) Depth: 5/7 00:00:00 1.bxa5 Kd5 2.a6 Kc6 3.Kb4 Kc7 4.Kxb5 +- (3.34) Depth: 6/11 00:00:00 5kN 1.bxa5 Kd5 2.a6 Kc6 3.a7 Kb7 4.Kd3 Ka8 +- (3.42) Depth: 7/11 00:00:00 12kN 1.bxa5 Kd5 2.a6 Kc6 3.a7 Kb7 4.Kd3 Ka8 5.Bd4 +- (3.71) Depth: 8/13 00:00:00 26kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.a7 Kb7 5.Bd4 Ka8 +- (3.71) Depth: 9/13 00:00:00 50kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.Ke4 Kc6 5.Kf3 b4 6.axb4 +- (4.48) Depth: 10/15 00:00:01 91kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.a7 Kb7 5.Ke4 Ka8 6.Kf3 Kb7 7.Kxg2 +- (5.08) Depth: 11/17 00:00:01 163kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.a7 Kb7 5.Ke4 Ka8 6.Kf3 Kb7 7.Kxg2 +- (5.08) Depth: 12/18 00:00:01 267kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.Ke4 Kc6 5.a7 Kb7 6.Kf3 Ka8 7.Bd4 Kb7 8.Kxg2 +- (5.37) Depth: 13/22 00:00:01 456kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.a7 Kb7 5.Ke4 Ka8 6.Kf3 Kb7 7.Kxg2 Ka8 8.Bd4 +- (5.64) Depth: 14/24 00:00:01 769kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.Ke4 Kc6 5.Kf3 Kc7 6.Kxg2 Kc6 7.a7 Kb7 8.Bd4 Ka8 +- (5.64) Depth: 15/28 00:00:01 1259kN 1.bxa5 Kd5 2.a6 Kc6 3.a7 Kb7 4.Kd3 Ka8 5.Ke4 Kb7 6.Kf3 Ka8 7.Kxg2 Kb7 8.Bd4 Ka8 9.Kf3 +- (5.90) Depth: 16/36 00:00:02 2281kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.Ke4 Kb8 5.Kf3 Kc7 6.Kxg2 Kb8 7.Bd4 Kc7 8.a7 Kb7 9.Kf3 Ka8 +- (5.90) Depth: 17/46 00:00:02 3919kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.Ke4 Kb8 5.Kf3 Kc7 6.Kxg2 Kb8 7.Bd4 Kc7 8.a7 Kb7 9.Kf3 Ka8 10.Ke4 +- (6.17) Depth: 18/46 00:00:03 5739kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.Ke4 Kb8 5.Kf3 Kc7 6.Kxg2 Kb8 7.Bd4 Kc7 8.Kf3 Kc6 9.a7 Kb7 10.Ke4 Ka8 +- (6.17) Depth: 19/46 00:00:06 9603kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.Ke4 Kb8 5.Kf3 Kc7 6.Kxg2 Kb8 7.Bd4 Kc7 8.Kf2 Kb8 9.a7+ Kb7 10.Ke3 Ka8 11.Ke4 +- (6.17) Depth: 20/46 00:00:10 16663kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.Ke4 Kb8 5.Kf3 Kc7 6.Kxg2 Kb8 7.Bd4 Kc7 8.a7 Kb7 9.Kf3 Ka8 10.Ke4 Kb7 11.Kd5 Ka8 +- (6.21) Depth: 21/48 00:00:16 25943kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.Ke4 Kb8 5.Kf3 Kc7 6.Kxg2 Kb8 7.Bd4 Kc7 8.a7 Kb7 9.Kf3 Ka8 10.Ke4 Kb7 11.Ke5 Ka8 12.Kd5 +- (6.21) Depth: 22/57 00:00:29 45845kN 1.bxa5 Kd5 2.a6 Kc6 3.Kd3 Kc7 4.Ke4 Kb8 5.Kf3 Kc7 6.Kxg2 Kb8 7.Bd4 Kc7 8.Kf3 Kb8 9.Ke4 Kc7 10.Kd5 Kb8 11.Kc6 Ka8 12.Kd5 +- (6.31) Depth: 23/59 00:00:55 84289kN (, 05.08.2005) >The above is just an example but of course there are thousants similar (E.Nemeth >posted many at the past) and this can probably cost at tournaments and I WONDER >WHY SMK DOESN'T FIX THIS?!?!?!? I remember a game when knowledge of Junior that this type of position is a draw costed it a point against shredder because shredder forced Junior to play b5 and won by axb5. Uri
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.