Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Crafty. How to make it stronger?

Author: Robert Hyatt

Date: 05:03:26 02/13/98

Go up one level in this thread


On February 13, 1998 at 04:10:11, Didzis Cirulis wrote:

>Yes, that is my question.
>I run Crafty 12.6 and 14.9 on my AMD 586 133(P75) 32 RAM PC, and its
>opponents are Rebel Decade 2.0, Genius 2 and CM5500. And I see that
>Crafty is not crafty at all! :(
>I run it with hash=16M and hashp=2M using the opening book made of those
>"large PGN files" given by Robert Hyatt. Results? Not a single win. Not
>even a single draw!
>Crafty falls out of opening book at very early stage of game. And, even
>if it has an equal position, it gets destroyed within 10-20 moves.
>Slowly but inevitably. Or finds itself in deep mess.
>I hope to believe that Crafty IS clever (means, I have to learn
>something about it)and can be tuned-up...
>
>Didzis Cirulis

When you say "out of book at an early stage" this sounds like either you
have a broken book, or a technical problem of some sort.  The large.pgn
files produce a book that should not miss many opening plans by the
opponent.  If you can post an example, I can check it against the same
book built on my P6.

If you are playing at fast time controls, Crafty won't do well on that
machine, because the shallow search depths will result in a signficant
number of null-move failures.  Longer time controls will help.  But to
make it play better, you need faster hardware.  It's designed to run at
P6/200 speeds, and the null-move search (and everything else) is going
to perform best at that speed or faster.

You didn't mention how many games, nor did you mention how you are
running
the games.  If you are running both programs on one machine, forget it.



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.