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Subject: Re: CCT8 - Final

Author: Tom Dyer

Date: 19:50:22 02/26/06

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On February 26, 2006 at 19:43:06, Mike Byrne wrote:

>For the blitz tournament, I disabled the bookc.bin and it seemed to get better
>openings and had a much better result.

>A good book is still very important and there was hardly any book preparation >at all - except for turning off bookc.bin.  My bookc.bin seemed to guide >Crafty to terrible lines with the black pieces and it repeated a terrible >Sicilian line twice.

Mike or Bob, sorry if you've already clarified this before somewhere, but I was
wondering if you can help me understand Crafty's optional bookc.bin and when to
use it / not use it.  On some other sites/posts I've seen the following:

"Bookc.bin which you can download with Crafty is in fact no more than a ordinary
books.bin file...It was built from the file start.pgn but after removal of
unsound , especially gambit lines to ensure that a more suitable book can be
built against other computers."

This would seem to indicate that it is recommended to use bookc.bin in computer
matches, but I've also received the advice to remove it even in computer
matches.  Bookc.bin (from the UAB ftp site) seems to do more than restrict
unsound gambit lines, in my results I've only seen it play 1. D4 from White.

Congratulations on the continued good performance of Crafty :)
Thank you,
Tom



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