Author: Uri Blass
Date: 02:21:31 03/03/02
Go up one level in this thread
On March 03, 2002 at 03:48:51, Gian-Carlo Pascutto wrote: >On March 02, 2002 at 22:48:13, Michael Fuhrmann wrote: > >>This position arose in a game between Crafty and Yace on my computer (no tbs). >>The two engines gave radically different scores. Crafty scores it + 4.68 for >>white, Yace as -.47 for black. Crafty maintained the high score for many moves, >>but the position is of course a draw. Why does Crafty score it +4.68? > >Crafty will try to swindle if it is up in material in a (tablebase) drawn >position. > >-- >GCP Crafty used no tablebases in the game based on the post and the fact that it is going to try to swindle does not answer the question why is the +4.68 evaluation when even only material score is only +2. Note that I get only +3 with Crafty that still seems too high. I guess that hyatt does not care about the knowledge of Crafty with no tablebases. I have more problems with Crafty's score in the following position from my last tournament game [D]5r2/pppk2pp/8/5p2/4NPB1/8/PPP3PP/2K5 w - - 0 26 I was black and I could save a draw in the game. I agree that white should win the game but +3 seems to me too large and Crafty says almost +3 for white Analysis by Crafty 18.12: 27.Nc5+ Kc6 +- (2.85) Depth: 1/6 00:00:00 27.Nc5+ Kc6 28.Ne6 fxg4 29.Nxf8 +- (2.77) Depth: 2/6 00:00:00 27.Nc5+ Kc6 28.Ne6 fxg4 29.Nxf8 +- (2.77) Depth: 3/6 00:00:00 27.Nc5+ Kc6 28.Ne6 fxg4 29.Nxf8 +- (2.77) Depth: 4/9 00:00:00 27.Nc5+ Ke7 28.Bf3 b6 29.Na6 c5 +- (2.70) Depth: 5/10 00:00:00 27.Nc5+ Ke7 28.Bf3 b6 29.Na6 c5 30.Kd2 +- (3.00) Depth: 6/11 00:00:00 19kN 27.Nc5+ Ke7 28.Bf3 b6 29.Nd3 Rd8 30.Ne5 a6 +- (2.87) Depth: 7/11 00:00:00 35kN 27.Nc5+ Ke7 28.Bf3 b6 29.Nd3 Rd8 30.Ne5 Ke6 31.Bc6 +- (3.03) Depth: 8/15 00:00:00 80kN 27.Nc5+ Ke7 28.Bf3 b6 29.Nd3 Kd6 30.Ne5 Re8 +- (2.89) Depth: 9/17 00:00:00 206kN 27.Nc5+ Ke7 28.Bf3 b6 29.Nd3 Kd6 30.Ne5 Re8 31.Nc6 a6 32.Ne5 +- (2.92) Depth: 10/18 00:00:01 413kN 27.Nc5+ Ke7 28.Bf3 b6 29.Nd3 Kd6 30.Kd2 Re8 31.Nb4 Kc5 32.Bc6 Rd8+ 33.Kc3 +- (2.87) Depth: 11/19 00:00:02 1075kN 27.Nc5+ Ke7 28.Bf3 b6 29.Nd3 Rf6 30.Ne5 Rh6 31.h3 Rh4 32.g4 fxg4 33.Bxg4 c5 +- (2.99) Depth: 12/22 00:00:05 2537kN 27.Nc5+ Ke7 28.Bf3 b6 29.Nd3 Kd6 30.Ne5 Re8 +- (2.87) Depth: 13/26 00:00:14 7987kN 27.Nc5+ Ke7 28.Bf3 b6 29.Nd3 Kd6 30.Ne5 Re8 31.Nc6 Re1+ 32.Kd2 Ra1 33.a3 Ra2 34.Nd4 g6 +- (2.98) Depth: 14/28 00:00:42 22840kN (Blass, Tel-aviv 03.03.2002) 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.