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Subject: Re: Null move

Author: James Robertson

Date: 11:45:54 02/04/99

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On February 04, 1999 at 03:26:14, Bruce Moreland wrote:

>
>On February 04, 1999 at 00:34:58, James Robertson wrote:
>
>>Ok; I tried out the en-passant stuff, and windowed Quiesce, and things are
>>looking up. Thanks for the help!!
>
>Windowing the quiescent search in there won't fix a bug.  The en passant thing
>might fix a bug but probably not.
>
>I think your problems are probably still there.
>
>It's always nice to have a repeatable case.  Can you go back and figure out at
>what point in that game things went to hell, and see if it happens again?
>
>bruce

Actually, there was another bug as well. How much should the null move improve a
program's performance? It seems to be searching .5 to 1 plies farther, and
approx. 2/3 to 3/4 the number of nps. Is this normal? In matches against the
non-null move version, it seems to be edging it out by with 6 wins, 4 losses. In
a match against Cilian, the null moves actually seem to be doing worse.

James



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