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Subject: Re: Avoid perpetual check?

Author: Uri Blass

Date: 04:01:05 09/04/04

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On September 03, 2004 at 22:55:43, Robert Hyatt wrote:

>On September 03, 2004 at 19:38:52, Jarkko Pesonen wrote:
>
>>did Kramnik win after Ne3.
>>
>>I modified crafty so that if there are 10 checks by one side in a row
>>it evaluetes the position as draw.
>>
>>Is there some limit in your opinion that would be realistic where
>>there could be more checks(10 or more in a row) in real game which is
>>not a DRAW
>
>There is probably a workable idea buried in there somewhere.  IE maybe not just
>dropping the score to zero, but after N consecutive checks start reducing the
>eval to encourage a non-checking move if it is possible, else let it reach zero
>pretty quickly...

I do something similiar but I think that programs that use hash for pruning may
have problems with it because it means evaluation dependent in the path
and it may return almost draw score for position not because it is a draw but
because of some non optimal line that it searched.

Using draw score also can cause similiar problems for the same reason.

Uri

Uri



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