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Subject: hash table & draw detection

Author: Arwin Smit

Date: 08:41:54 05/01/02

Hi,

I programmed a hash table for my chess engine. It seems to be faster
and stronger now, but as far as I know the disadvantage of using a
hashtable is that the engine will not always find the best solution
anymore. And this is caused by not being able to see a 3-fold repetition
draw anymore in some cases. A position may be in the hash table and
returning a non-draw score, but it was reached in a different part of the
search tree by repetition of positions.

This worries me a bit since this is the first time I made a change to my
engine causing it to be "non-perfect".
Is the advantage bigger than the disadvantage?
What is the best way to test which version is better anyway? Just let it
play a lot of games against eachother?

Arwin

Re: hash table & draw detection Will Singleton 18:53:01 05/01/02
- Re: hash table & draw detection Robert Hyatt 21:02:53 05/01/02
  - Re: hash table & draw detection Will Singleton 22:54:29 05/01/02
    - Re: hash table & draw detection Robert Hyatt 08:48:59 05/02/02
      - Re: hash table & draw detection Uri Blass 11:52:22 05/02/02
        
        Re: hash table & draw detection Dieter Buerssner 16:35:02 05/02/02
      - Re: hash table & draw detection J. Wesley Cleveland 09:32:49 05/02/02
        
        Re: hash table & draw detection Robert Hyatt 10:22:49 05/02/02
        
        Re: hash table & draw detection J. Wesley Cleveland 13:35:07 05/02/02
    - Re: hash table & draw detection Ricardo Gibert 03:00:51 05/02/02
      - Re: hash table & draw detection Will Singleton 08:00:08 05/02/02
        
        Re: hash table & draw detection Michael Williams 19:25:28 05/03/02
        
        Re: hash table & draw detection--added info Michael Williams 19:33:35 05/03/02
        
        Re: hash table & draw detection--added info Michael Williams 19:47:23 05/03/02
        
        Re: hash table & draw detection--added info Uri Blass 05:30:51 05/04/02
        
        Re: hash table & draw detection--added info Dieter Buerssner 16:08:30 05/04/02
        
        Re: hash table & draw detection--added info Uri Blass 16:25:59 05/04/02
        
        Re: hash table & draw detection--added info Michael a 14:57:48 05/04/02
        
        Re: hash table & draw detection Ricardo Gibert 10:10:43 05/02/02
        
        Re: hash table & draw detection Ricardo Gibert 10:22:43 05/02/02
        
        Re: hash table & draw detection Robert Hyatt 08:52:36 05/02/02
Re: hash table & draw detection Robert Hyatt 09:28:12 05/01/02

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