Computer Chess Club Archives

Search

Messages

Subject: Re: null move margin ?!

Author: Tony Werten

Date: 12:02:25 07/30/02

Go up one level in this thread

On July 30, 2002 at 13:56:53, Thorsten Czub wrote:

>in an old program i can set the null move margin on or off.
>what is the function doing ? any ideas or explanations from the programmers?

I'll give it a guess.

Normally when you do a nullmove and the score returned is > beta you get a
cutoff. The idea is that if doing nothing already gives bigger than beta, doing
something would give even more.

You can go one step further with this idea. Since doing something would be
better than doing nothing, then doing nothing doesn't have to be > beta but only
> beta - margin since I expect that a move is worth at least "margin"

Tony

>
>what are the effects ?
>
>thank you.
>
>Thorsten Czub.

• Re: null move margin ?! Ulrich Tuerke 04:55:51 07/31/02
  • Re: null move margin ?! Uri Blass 05:52:41 07/31/02
    • Re: null move margin ?! Ulrich Tuerke 06:04:57 07/31/02
  • Re: null move margin ?! Tony Werten 05:16:18 07/31/02
• Re: null move margin ?! Uri Blass 12:17:39 07/30/02
  • Re: null move margin ?! Thorsten Czub 13:26:37 07/30/02
    • Re: null move margin ?! Uri Blass 05:11:26 07/31/02
      • Re: null move margin ?! Dieter Buerssner 13:35:30 07/31/02
        • Re: null move margin ?! Peter Berger 14:15:25 07/31/02
          • Re: null move margin ?! Dieter Buerssner 14:25:42 07/31/02
            • Re: null move margin ?! Peter Berger 14:30:19 07/31/02
              • Re: null move margin ?! Dieter Buerssner 14:39:48 07/31/02
                • Re: null move margin ?! Peter Berger 14:53:39 07/31/02

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.