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Subject: Re: Effect of opening book

Author: Uri Blass

Date: 06:05:41 09/06/04

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On September 06, 2004 at 07:43:07, Eydun Lamhauge wrote:

>Almost all chess engines today have their own opening book. Is it possible to
>say, how many rating points approx. a chess engine with an average opening-book
>is stronger than the same chess engine without any opening book?

No

Without knowing what games do you use to calculate rating it is possible to say
nothing.

You can caluclate rating by a match of 40 games between every 2 engines in the
team you test and in that case the program without book may lose the same
opening again and again and it is possible to test by only 2 games between every
2 opponents.

You can also calculate rating by 40 games between every 2 players but when the
40 games are not played as a single match.

In all cases you may get a different difference in rating.

Uri



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