Computer Chess Club Archives




Subject: Re: MTD(f)

Author: Tord Romstad

Date: 03:26:47 01/15/04

Go up one level in this thread

On January 14, 2004 at 20:11:53, Dann Corbit wrote:

>On January 14, 2004 at 16:49:29, Tord Romstad wrote:
>>Another simple trick is to reduce the resolution of your evaluation
>>function.  In my pre-MTD(f) days, I used pawn=128.  I still use pawn=128
>>as the internal unit in my evaluation function, but before returning
>>the final score I divide the score by 2.  This simple change made my
>>search noticably more efficient.
>Did you try other divisors besides 2?

No, not yet.  When I have cleaned up my source code a bit, I plan to make
it possible to choose the divisor in my init file.  I don't think bigger
divisors would result in stronger play, though.  It would make the engine
faster, but I am afraid a lower resolution would hurt the already poor
positional knowledge of Gothmog.


This page took 0.03 seconds to execute

Last modified: Thu, 07 Jul 11 08:48:38 -0700

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