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Subject: Re: Hashing

Author: Russell Reagan

Date: 12:06:37 04/04/03

On April 04, 2003 at 14:57:50, Keith Evans wrote:

>What do you think you will gain by excluding certain elements?

I have heard people discuss the drawbacks of including the fifty move counter in
the past. I'm not sure of the details though.

As far as an example, try this:

[D] rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq e3 0 1

The en passant square is e3. If you did a large search from this position, and
then encountered it again without the ep square set, then you won't find it in
your transposition table, even though the en passant square being set has
nothing to do with the score of this position. If you didn't hash the ep square,
you would get that large search again here for free. Maybe this is something
that partition search addresses. I'm not sure.

Re: Hashing Robert Hyatt 19:14:02 04/04/03
- Re: Hashing Ian Osgood 10:05:35 04/05/03
  - Re: Hashing Robert Hyatt 19:53:54 04/05/03
Re: Hashing Dieter Buerssner 13:11:48 04/04/03
- Re: Hashing Dave Gomboc 19:03:43 04/04/03
- Re: Hashing Russell Reagan 13:40:07 04/04/03
  - Re: Hashing Dieter Buerssner 13:55:02 04/04/03
    - Re: Hashing Russell Reagan 14:10:15 04/04/03
      - Re: Hashing Dieter Buerssner 11:58:49 04/05/03
      - Re: Hashing Sune Fischer 17:02:16 04/04/03
        
        Re: Hashing Russell Reagan 17:23:44 04/04/03
        
        Re: Hashing Sune Fischer 17:46:21 04/04/03
        
        Re: Hashing Dieter Buerssner 12:26:18 04/05/03
      - Re: Hashing Russell Reagan 15:35:53 04/04/03
        
        Re: Hashing Angrim 10:52:54 04/05/03
        
        Re: Hashing Russell Reagan 11:06:05 04/05/03
        
        Re: Hashing Uri Blass 11:23:19 04/05/03
Re: Hashing Angrim 13:04:03 04/04/03
Re: Hashing Steve Maughan 13:00:06 04/04/03

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