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Subject: Re: what is the longest game of chess between programs?

Author: Robert Hyatt

Date: 06:04:49 10/14/98

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On October 14, 1998 at 03:15:10, blass uri wrote:

>I can imagine a practical game with more than 600 moves when the side with
>KBPPvK (wrong bishop) is playing 49 quiet moves and pushes a pawn forward.
>h2-h3 h3-h4 h4-h5 h5-h6 h6-h7 h7-h8 are 6 pawn moves of h2 and there are 5 pawn
>moves of the pawn h3 and if we count the beginning of the game than it is more
>than 1200 plies.
>
>I suspect that many program will go to an infinite loop before the end of the
>game and will lose on time.
>
>Uri

I don't know why they would, because the game is still constrained by
things like the 50-move rule.  However, Crafty has played at least two
games that went over 500 moves.  Early on, winboard/xboard had a 256 entry
list for black and white moves, which meant when the game passed move 256
it would hang because winboard/xboard would crash.  Tim fixed this when I
told him about this, bumping it to 1024.  I have since played one game
vs a human over 500 moves that I remember, and at *least* one against a
computer...

I could play a game 5000 moves long with no difficulty at all...  At 40/2
at ACM events I have played two games over 12 hours long as well...



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