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Subject: Verified Null-moving

Author: Tor Lattimore

Date: 21:21:42 08/11/04

I have been fiddling arround with my nullmove pruning lately. I have tried both
R=2, R=3 and R=3 with verifications.

Average ply on WAC, 1 second a move P IV, 512 MB ram:
R=2      9.5
R=3      10.5
R=3 with verification      10.2

However R=3 had a terrible success rate (135 or so), R=2 got 147 and R=3 with
verification got 143. What do other people use here? and what sort of
improvments do you get? The extra ply may be worth the puzzle sacrifice, but i'm
not convinced i'm really *getting* the extra ply.
Thanks
Tor

Re: Verified Null-moving Ross Boyd 03:40:48 08/12/04
- Re: Verified Null-moving Tor Lattimore 04:33:23 08/12/04
  - Re: Verified Null-moving Anthony Cozzie 06:25:11 08/12/04
    - Re: Verified Null-moving Uri Blass 08:10:58 08/12/04
    - Re: Verified Null-moving Stuart Cracraft 07:20:10 08/12/04
    - Re: Verified Null-moving Tord Romstad 06:31:15 08/12/04
      - Re: Verified Null-moving Dan Honeycutt 19:56:21 08/12/04
      - Re: Verified Null-moving Anthony Cozzie 07:33:38 08/12/04
- Re: Verified Null-moving Tord Romstad 04:12:08 08/12/04
  - Re: Verified Null-moving martin fierz 05:38:46 08/12/04
    - Re: Verified Null-moving martin fierz 05:42:28 08/12/04
      - Re: Verified Null-moving Tord Romstad 06:28:24 08/12/04
        
        Re: Verified Null-moving martin fierz 07:52:36 08/12/04
        
        Re: Verified Null-moving Peter Fendrich 08:42:28 08/12/04
        
        Re: Verified Null-moving Tord Romstad 08:35:59 08/12/04
        
        Re: Verified Null-moving Peter Fendrich 14:37:35 08/12/04
        
        Re: Verified Null-moving Uri Blass 08:18:35 08/12/04
        
        Re: Verified Null-moving Tord Romstad 08:39:17 08/12/04
        
        Re: Verified Null-moving Tony Werten 08:02:21 08/12/04
        
        Re: Verified Null-moving Peter Fendrich 07:16:33 08/12/04
        
        Re: Verified Null-moving Tord Romstad 08:48:35 08/12/04
        
        Re: Verified Null-moving Peter Fendrich 12:14:54 08/13/04
- Re: Verified Null-moving Pham Hong Nguyen 03:58:36 08/12/04
  - Re: Verified Null-moving Ross Boyd 15:18:40 08/12/04
    - Re: Verified Null-moving Pham Hong Nguyen 05:30:16 08/13/04
      - Re: Verified Null-moving Ross Boyd 06:03:26 08/14/04
    - Re: Verified Null-moving Tord Romstad 02:27:51 08/13/04
      - Re: Verified Null-moving Ross Boyd 05:53:06 08/14/04
Re: Verified Null-moving Volker Böhm 23:07:32 08/11/04

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