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Subject: Re: Dr. Hsu @ Microsoft

Author: Robert Hyatt

Date: 20:21:29 10/15/99

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On October 15, 1999 at 18:29:28, Eelco de Groot wrote:

>Finally some real news on this! Thanks Scott! Is it really true that the
>original chip didn't use extensions at all in the last 4 ply search, where the
>chips were used, does anybody know? I read something like that in a Dutch post
>by Vincent on the semi official CSVN mailinglist.
>
>Regards,Eelco


The chess chip didn't do 'singular extensions'.  I have not seen anything
about whether it used in check extensions or anything else.  Had I done the
chip I probably would have not done _any_ extensions in the hardware for
reasons that are a bit complex to get into here unless someone wants to
discuss the issue in more detail.

The chess chips basically could maintain the board position, and when desired,
do an N ply search (N=4 for the configuration he used I think) + captures when
required...




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