Computer Chess Club Archives

Search

Terms

Messages

Subject: Re: Null move question

Author: Robert Hyatt

Date: 10:07:14 07/30/03

On July 30, 2003 at 02:57:32, Rick Bischoff wrote:

>Hi everyone,
>
>I am trying out null move and am running into a problem-- I am trying the null
>move when beta is still +INF, so what happens is that it calls quies(-INF,
>-INF+1) which will of course fail high.  Is there something else I am missing or
>do I need to avoid null move if beta is +INF?
>
>Thanks,
>Rick

Are you backing up values correctly?  At the next search you will fail
high, which will back up a fail-low value to the current ply, meaning
the null-move search fails low and you just wasted some nodes.

Re: Null move question Rick Bischoff 14:00:48 07/30/03
- Re: Null move question Robert Hyatt 14:07:53 07/30/03
  - Re: Null move question Rick Bischoff 14:18:12 07/30/03
    - Re: Null move question Tony Werten 11:23:34 07/31/03
      - Re: Null move question Angrim 08:15:53 08/01/03
        
        Re: Null move question Tony Werten 13:42:13 08/01/03
      - Re: Null move question Robert Hyatt 15:15:47 07/31/03
        
        Re: Null move question Tony Werten 02:09:59 08/01/03
        
        Re: Null move question Robert Hyatt 19:45:11 08/01/03
        
        Re: Null move question Tony Werten 00:44:06 08/02/03
        
        Re: Null move question Tim Foden 05:25:43 08/02/03
        
        Re: Null move question Omid David Tabibi 06:04:12 08/02/03
        
        Re: Null move question Tony Werten 08:12:29 08/02/03
        
        Re: Null move question Sune Fischer 09:15:18 08/02/03
        
        Re: Null move question Dieter Buerssner 11:40:45 08/02/03
        
        Re: Null move question Sune Fischer 12:45:52 08/02/03
        
        Re: Null move question Dieter Buerssner 13:12:44 08/02/03
        
        Re: Null move question Dieter Buerssner 13:16:52 08/02/03
        
        Re: Null move question Omid David Tabibi 09:48:05 08/02/03
        
        Re: Null move question Sune Fischer 10:33:52 08/02/03
        
        Re: Null move question Omid David Tabibi 08:31:33 08/02/03
        
        Re: Null move question Omid David Tabibi 01:02:29 08/02/03
        
        Re: Null move question Tony Werten 03:00:57 08/02/03
        
        Re: Null move question Omid David Tabibi 03:33:54 08/02/03
        
        Re: Null move question Tony Werten 08:07:35 08/02/03
        
        Re: Null move question Omid David Tabibi 08:33:28 08/02/03
    - Re: Null move question Robert Hyatt 08:14:05 07/31/03
    - Re: Null move question Angrim 20:49:27 07/30/03

This page took 0.01 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.