Author: James T. Walker
Date: 06:19:25 05/30/02
Go up one level in this thread
On May 30, 2002 at 02:15:38, Uri Blass wrote: >On May 30, 2002 at 00:44:06, Robert Hyatt wrote: > >>On May 29, 2002 at 02:34:34, Robin Smith wrote: >> >>>The position is easily winning for white. But tablebases cause programs to want >>>to play 1.Rxf5?? after which there is a tablebase mate in 65 .... except the 50 >>>move rule kicks in first and the game ends up a draw. Are there any programs >>>that avoid this type of blunder? [D] 5k2/3K4/8/R4b2/1R6/8/3B4/5r2 w - - 0 1 >> >> >>Can't avoid it. The current tablebases don't include 50-move-rule >>issues, so this is just a fact of life for tablebases. > >You can avoid it by translating mate in 67 to something like +2 so you are going >to prefer safer ways to win the game if you can see them by search. > >Uri As I mentioned in another post, Crafty finds a mate in 48 with this position after about 52 seconds on my 1.4G cpu. One "partial" solution would to be .. don't stop searching on mates longer than 50 unless you are strapped for time. Many top programs stop searching as soon as they find a mate when often there are shorter mates available. Jim
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.