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Subject: Re: Computer chess vs. computer checkers and other games

Author: Uri Blass

Date: 22:59:00 05/03/02

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On May 04, 2002 at 01:33:49, Terry McCracken wrote:

>On May 04, 2002 at 00:58:59, Russell Reagan wrote:
>
>>I'm curious if anyone knows anything about the computer checkers scene. I know
>>about computer chess, how chess programs work, how good chess programs are
>>compared to the best human chess players, etc. and would like to find out about
>>checkers programs. I know that (for example) go programs aren't anywhere close
>>to master strength. So are checkers programs as good as the best master checkers
>>players? I would guess that checkers would probably use some of the same basic
>>methods as a chess program, such as search and evaluation, but are there any
>>special methods that a checkers program would use that chess programs don't? Or
>>any methods a chess program uses that a checkers program wouldn't use
>>successfully?
>>
>>I've only recently started playing checkers to get a feel for the game, but it
>>seems like there are a great number of positions where zugzwang occurs and so
>>null move probably wouldn't work in checkers, or maybe it would need
>>modifications. I'm mainly interested in checkers programs and that whole
>>"scene", but also if anyone has any info to offer on other game playing programs
>>I'd like to hear that as well. I'm more a fan of game playing programs and AI
>>methods in general than only chess.
>>
>>One last thing I thought about was endgame tablebases. Are these available for
>>checkers or other games? It seems like it might be both faster and smaller to
>>generate the tablebases for checkers, but I'm not totally sure on that. There
>>are fewer pieces on the board and fewer squares of the board that are in use, so
>>it seems like endgame tablebases might play a more significant role if they were
>>created for checkers.
>>
>>Thanks for your info.
>>
>>Russell
>
>I really can't say how checker programmes in general, or even the best
>commercial programmes play, relative to chess programmes. However, I _do_ know
>Chinook is unbeatable, it plays perfect checkers since a bug was removed
>after plaing Tinsley in 1994. And yes Chinook has endgame tablebases:o)


How do you know that it plays perfect checkers?

A player can be unbeatable not because of playing perfect but because of the
facts that the opponents do not know to take advantage of it's mistakes.

Uri



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