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Subject: Re: Selective Searching

Author: Don Dailey

Date: 15:44:35 02/06/98

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On February 06, 1998 at 14:02:11, Stuart Cracraft wrote:

>A number of years ago, commercial programs like Lang's, and others
>seemed to get about 100 points stronger due to being selective
>searchers over their brute-force full-width, with capture quiescence
>counterparts.
>
>Is this true? If so, what are the nature of the changes involved?
>
>Thanks,
>Stuart

Hi Stuart,

You need to know about null move searching if you are writting a chess
program. There are some good articles in ICCA past issues and you should
definitely try to dig them up.  Just about every program now uses it but
there are a few exceptions.    No one knows for sure what Richard Lang
does but it's likely to involve similar ideas.   If you want I can send
you the basic idea and some psuedo code.

- Don





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