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Subject: Re: Hydra's Limit Of A Ten Move Per Line Opening Book

Author: Henrik Dinesen

Date: 14:52:12 06/24/05

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On June 24, 2005 at 17:00:29, Steve B wrote:

>On June 24, 2005 at 16:56:30, Claude Le Page wrote:
>
>>I totally agree that 12 moves are sufficient
>>Why 12? and not 10 ?Because of 2 openings : Open Ruy Lopez and KID main line
>>Else ,programs are quite able , either to find theretical moves or to find
>>better ones
>>I remember i was making tries on a "minimal" opening book:
>>There was a match between Junior7 and ChessTiger15 ( 2 games same line , colours
>>reversed ) anopening book gave only :
>>1 Nf3 Nf6 2 c4
>>In Ju7/CT15 I got a Neo-Grunfeld , and in CT15/Ju7 ,more amazingly , a
>>Blumenfeld gambit
>>But for Ruy Lopez and KID it doesn't work if your book doesnt give 10 moves ,
>>and in2 cases preferably 12
>
>there is a real puzzlement to me then
>it seems as if many knowledgeable people here agree on a limited book and yet
>none of the leading programs use this concept except for Hydra
>
>i am simply dont know enough about PC  progs to understand why this is
>
>Steve

Intentions, I think.

When a commercial engine is released, the enclosed is exspected - by the
customer - to both suit the engines style (of course) and present "common" chess
openings. But it's unclear to the developers how the program will used by the
user, so they make a kind of mainstreambook, but deep enough for the engine to
play other engines (and not loose because of bad choices too early in a
blitzgame). Since most GUI's allow changes in the way the books are handled,
this makes some sense if the user know how to adjust the booksettings.

Donningers approach makes sense against a GM, but I doubt it works just as well
against strong engines with good and deeper books.

So the question and the answer is, what is the purpose - the intention - with
book? A specific event or a release (and a release for what purpose).

Henrik




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