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Subject: Re: Aristarch 4.4

Author: Mogens Larsen

Date: 06:05:23 08/10/02

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On August 10, 2002 at 06:07:13, Uri Blass wrote:

>How do you build opening books for chess programs?

Depends on the program and the associated bookbuilder. It can be a large
collection without a lot of thought involved (eg. Crafty and Yace). Preferences
can be determined later. Sometimes result (to calibrate winpercentage for
example or avoid draws), moveorder (not all books are transpositional) and size
of the resulting book are important factors. Then you need a smaller collection.
One you can control.

>Based on result that I see with movei I may consider to replace the small
>opening book of movei that I built manually with a book that it's only target is
>to get the opponent out of book.

That's probably not a bad idea. Depends on the ability of Movei to develop its
pieces and castle in the opening. Not all top programs are good at that, so I
imagine it's a weak spot to be exploited.

>I may consider having a lot of lines like 1.a3 1.c3 1.d3 1.e3 1.h4 or
>1.e4 a6 in my next book.

There are other more common, but not frequently played, variations, where it's
possible to be especially prepared. Depends on the amount of work you're willing
put into it.

Regards,
Mogens



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