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Subject: Re: Create a book that makes an engine 700 ELO Weaker

Author: Dann Corbit

Date: 11:17:11 02/18/05

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On February 18, 2005 at 12:52:51, Volker Böhm wrote:

>Hi,
>
>this shouldn´t be a problem would it? :-)
>
>Not joking:
>I think a good book could improve a chess engine, and a bad book can hinder a
>chess engine.
>My theory is that the stronger a chess engine is, the better must a book be to
>not  weaken the strength of the engine. Thus a strong engine needs at least an
>acceptable book. The amount of elo a strong engine can gain from a "very strong
>book" (i.e. a book that is well tuned for the engine) is much less than the
>amount of elo a weak engine can gain.

Originally, that was my theory also.

But a good book seems to provide as good or perhaps even more benefit for Fruit
as it does for Glaurung.  Now, Fruit is stronger than Glaurung, and so I would
have expected a bigger benfit for Glaurung.  But I did not see that:
http://www.talkchess.com/forums/1/message.html?412441

Probably, at least with extreme examples, we must see something along those
lines, I would think.

We cannot (for instance) benefit a 2700 Elo program by 400 Elo points, but
probably with a 1500 engine and an excellent, deep book we can do that.



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