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Subject: Re: Null move generalization

Author: Dann Corbit

Date: 13:09:27 04/17/02

On April 17, 2002 at 15:43:23, Jesus de la Villa wrote:

>
>Have someone defined the general rule(s) where null move
>is unable to find simple combinations?, and if so, which
>are those rules ?
>
>"Obviusly" is more expensive to check it than to not
>use Null Move.

There are times you simply must turn null move off or disasters will happen.

When the board gets sparse, turn it off.

If you are in check, turn it off.

If you are already searching with null move, additional null move pruning [for
subsequent plies] is questionable.

If you see a checkmate threat during the null move search, turn it off or
extend.

Null move will not remove the ability to find simple combinations.  It only
delays it.  But it might delay it enough that you will not find it in a
reasonable time.

Re: Null move generalization Uri Blass 13:32:47 04/17/02
- Re: Null move generalization Dann Corbit 13:40:01 04/17/02
  - Re: Null move generalization Gian-Carlo Pascutto 13:53:30 04/17/02
    - Re: Null move generalization Peter McKenzie 14:45:03 04/17/02
      - Re: Null move generalization Vincent Diepeveen 06:32:39 04/18/02
      - Re: Null move generalization Ed Schröder 02:27:18 04/18/02
        
        Re: Null move generalization Peter McKenzie 12:45:55 04/18/02
      - Re: Null move generalization Dann Corbit 15:56:19 04/17/02
        
        Re: Null move generalization Gian-Carlo Pascutto 22:48:21 04/17/02
        
        Re: Null move generalization Miguel A. Ballicora 18:33:47 04/17/02
        
        Re: Null move generalization Ricardo Gibert 17:05:52 04/17/02
        
        Re: Null move generalization Dann Corbit 17:20:04 04/17/02
        
        Re: Null move generalization Gian-Carlo Pascutto 22:49:46 04/17/02
        
        Re: Null move generalization Vincent Diepeveen 06:42:27 04/18/02
        
        Re: Null move generalization Gian-Carlo Pascutto 09:30:50 04/18/02
        
        Re: Null move generalization bob o 19:49:57 04/18/02
        
        Re: Null move generalization Uri Blass 22:30:00 04/17/02
        
        Re: Null move generalization Ricardo Gibert 18:27:18 04/17/02
        
        Re: Null move generalization Peter McKenzie 18:10:36 04/17/02

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