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Subject: Re: CSTal opening book - how?

Author: Chris Whittington

Date: 05:08:19 10/27/97

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On October 27, 1997 at 04:03:35, Graham Laight wrote:

>How do we suppose that CSTal manages to choose such good openings?
>
>Do we think that there is an ingenious new algortithm for opening
>selection, or is it just the sheer size of the opening book?
>
>I think it is probably down to the sheer size of the opening book. Do
>any other programs have an opening book of CSTal's size? (circa 250
>million moves).

Its just the size. Quantity, not quality. And I'm not convinced that it
does choose good openings. other than it chooses with the criteria that
humans play the specific lines and win more often than they lose.

This is easy to do for white, but black openings need human intervention
for their 'selection'. So CSTal plays better for white than for black.

Chris Whittington



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