Author: blass uri
Date: 23:13:04 03/29/00
Go up one level in this thread
On March 29, 2000 at 20:46:17, Pete Galati wrote: >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 I think that your results are not statistically significant and we cannot reject the conjecture that your book and crafty's book have the same value for crafty. Uri
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