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Subject: Re: draw by repetition behaviour

Author: Frank Phillips

Date: 10:25:41 05/31/01

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On May 31, 2001 at 08:55:44, JW de Kort wrote:

>Hi,
>
>My program has by now reached a level were it can play strong enough to leve the
>middle game in a favorable position. e.g. advantage of a bishop or a few pawns.
>Every time this happens the program seems to reach some kind of an equilibrium
>and the position will result in a draw by repetition. Can anybody explain why
>this happens? I would expect the program to try to make use of this advantage.
>This even happens when the position was completely won having an advantage of
>two pawns.
>
>
>Can anybody explain why this is happening?
>
>
>Greetings
>
>Jan Willem


I think I had an extreme version of this in CCT3 against Markol.  See my earlier
post.  I was hoping Bob or Bruce would respond.  My take on this is that the
program must be able to see in the search some reason to make progress ie a
position with a higher score than currently, or that 3 fold repetition will make
the current position, if repeated, less attractive.  If this theory is correct
then you might consider checking that your repetition detection is working.




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