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Subject: Re: Book learning examples

Author: Chris Whittington

Date: 01:38:48 11/27/97

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On November 27, 1997 at 03:38:28, Howard Exner wrote:

>Does anyone have an example of a series of games where a book
>learning program (MCPro, Crafty, Rebel 9) re-writes a book line
>that initially loses then gradually finds an improved line?

Yes, but I haven't got the games anymore. Mchess is particularly 'good'
at this, since it plays a limited, but well booked-up, opening set; and
it will tend to repeat specific opening lines again and again, even if
it loses them, if it thinks the score just out of book is good. Examples
are french, urusov gambit typically. If you fix your programs learning
(you being the programmer), to replay won games, then the result can
often be long autoplayer sequences on a specific variation. It is
possible to find 'improved' lines this way. With 'cooperation' between
programmers to lock their programs into specific lines, I guess it would
be possible, with strong programs playing on fast machines, to have
quite an impact on opening theory and to find useful novelties. Maybe it
would be possible to do it via a self-play process as well - new feature
?

Chris Whittington



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