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Subject: null move efficiency

Author: Mike Siler

Date: 17:38:47 04/19/04

My program tries a null move search if

1. it's not the endgame
2. it's not a PV node
3. it didn't just make a null move
4. it's not in check and wasn't in check on the previous ply
5. the remaining depth isn't so small that the reduced depth would take it into
the qsearch

In general, only around 65% of the null move searches my program performs result
in a cut-off. Is this normal or do other programs tend to do better (and how)?
According to Ed Schröder's page, Rebel gets around 93-95%. I've tried the
recommendations listed there but they didn't help much.

Michael

Re: null move efficiency Daniel Shawul 23:52:12 04/20/04
- Re: null move efficiency José Carlos 00:32:14 04/21/04
  - Re: null move efficiency Daniel Shawul 00:57:50 04/21/04
    - Re: null move efficiency Daniel Shawul 01:12:31 04/21/04
      - Re: null move efficiency José Carlos 02:19:54 04/21/04
Re: null move efficiency Tord Romstad 01:50:19 04/20/04
- Re: null move efficiency Tony Werten 03:36:35 04/20/04
  - Re: null move efficiency Tony Werten 03:40:34 04/20/04
    - Re: null move efficiency Tord Romstad 03:47:34 04/20/04
      - Re: null move efficiency Tony Werten 05:36:34 04/20/04
      - Re: null move efficiency Sune Fischer 04:45:16 04/20/04
        
        Re: null move efficiency Tord Romstad 09:42:14 04/20/04
        
        Re: null move efficiency Tony Werten 00:30:03 04/21/04
        
        Re: null move efficiency Tony Werten 08:01:36 04/22/04
        
        Re: null move efficiency Sune Fischer 16:57:00 04/20/04
        
        Re: null move efficiency Uri Blass 03:26:58 04/21/04
        
        Re: null move efficiency Sune Fischer 03:55:57 04/21/04
        
        Re: null move efficiency Uri Blass 05:12:42 04/21/04
        
        Re: null move efficiency Uri Blass 04:58:10 04/21/04
        
        Re: null move efficiency Tord Romstad 04:18:47 04/21/04
        
        Re: null move efficiency Sune Fischer 04:25:29 04/21/04
        
        Re: null move efficiency Tord Romstad 02:44:51 04/21/04
        
        Re: null move efficiency Sune Fischer 04:14:55 04/21/04
        
        Re: null move efficiency Tord Romstad 04:37:48 04/21/04
        
        Re: null move efficiency Tord Romstad 10:20:22 04/20/04
- Re: null move efficiency José Carlos 02:06:17 04/20/04
  - Re: null move efficiency Tord Romstad 04:00:46 04/20/04
Re: null move efficiency Vincent Diepeveen 20:52:59 04/19/04
- Re: null move efficiency Vincent Diepeveen 20:54:16 04/19/04

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