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Subject: Re: Creating a .CTG opening book for Fritz/Nimzo/Hiarcs/etc.

Author: Peter Stein

Date: 15:34:53 11/24/00

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On November 20, 2000 at 22:08:11, Bob Durrett wrote:

>On November 20, 2000 at 17:56:00, Peter Stein wrote:
>
>>Does anyone know of a reference for creating an opening book for these programs?
>>Specifically something that describes how to adjust the weights of various moves
>>so that the playing program will select moves based on user specified weights?
>>Is this even possible?
>
>Did you say "creating" an opening book?  As opposed to modifying an existing
>book?
>
>If you wish to start from scratch, use Chessbase 8.0.  You can create a book
>from any collection of games, using CB8.0, but selecting the games to use might
>take some doing.
>
>If you wish to modify an existing book, try chessbase's PowerBook2000.  First
>throw away all moves you do not want in your new book.  Then add moves you want
>if they are not already there.  Adjust weightings as a final step.

What are you using to adjust the weights? CB8 or the tree editor of a playing
program like Fritz?

I tried creating a book by importing from a database and then adjusting the
weights. Unfortunately this didn't work correctly because after the import I was
only able to adjust the weights of those moves which were given a frequency as a
result of the import. I'm not sure if I set the import up incorrectly or whether
this is a bug in the tree editor.



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