Author: Pete Galati
Date: 17:46:17 03/29/00
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On March 29, 2000 at 19:53:59, Anatoli wrote: >Hi everyone ! > >I read many times that it is better for every chess engine to use it is own book >which was prepared for it by experienced players, even IG. OK, I looked through >the books which were prepared for Ftitz, Junior or Hiarcs. They are on the CDs >and everybody can copy them on your hard drive. But I can't see any point to do >it. There is nothing special about these books. There are thousands and >thousands games in there from the girl's and boy's tournaments aged under 10-12. >Who could chose these games for Fritz or Junior, what is the value of these >games in the Fritz's library ? What can it learn from these games ? As for me, I >deleted all games of this sort from my DB. So, my personal opinion is that the >books of most top engines are just a collection of any games which were squeezed >into a tree. Let's better make our own books. >Thanks >Anatoli It's very difficult to improve on opening books selected by the programmer, if you look here: http://members.xoom.com/avochess/MOREPGN.TXT you'll see a summary of what I put in a Crafty opening book that I made, it was a collection originally selected for Amy. This ended up being a 218mb opening book when compiled by Crafty at 60 ply, the one you can download at Bob's ftp is only 12mb. Here's a pgnres of a small tournament where I've been testing it against the old opening book, my book is "Crafty" and the original opening book is "Craftyob". There's only 4 games left in this tournament, between my opening book's Crafty, & TCB. The Crafty with my opening book is so far behind in percentage points that it won't catch up in 4 games. My book lost I think. Pete Results from file new2.pgn: No. Name Win Draw Loss Unf. Score Games % ----------------------------------------------------- 1 Craftyob +10 =9 -5 *0 14.5 24 60.4% 2 Crafty +6 =10 -4 *0 11.0 20 55.0% 3 TCB +4 =5 -11 *0 6.5 20 32.5% Total Games: 32 White Wins: 10 (31.2%) Black Wins: 10 (31.2%) Draws: 12 (37.5%) Unfinished: 0 (0.0%)
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