Computer Chess Club Archives

Search

Terms

Messages

Subject: Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?)

Author: Tord Romstad

Date: 01:12:45 08/19/03

On August 19, 2003 at 02:48:36, Omid David Tabibi wrote:

>It seems that some programs use Static Exchange Evaluation in order to prune
>losing captures in quiescence search.

Not just some.  Almost all strong programs do this, I think.

>In the following position, an SEE will deem the move 1.Rxd7 a losing capture, and it might
>get pruned in quiescence. However, in fact this is a winning capture since Qf6 is attacked
>after 1.Rxd7. How do such programs solve these kind of problems?

They don't (or at least most don't).  On the other hand, the significant extra
speed gained
by not searching all captures help them find a lot of other tactics which they
otherwise
wouldn't have found.

Try it yourself.  I am almost certain that you will find that excluding losing
captures
from the qsearch is a big win.

Tord

Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Joost Buijs 03:19:59 08/19/03
- Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Bo Persson 04:43:08 08/19/03
  - Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Uri Blass 05:05:39 08/19/03
    - Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Uri Blass 05:07:07 08/19/03
      - Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Bo Persson 04:36:37 08/20/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Robert Hyatt 15:19:05 08/20/03
Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Omid David Tabibi 02:04:58 08/19/03
- Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Robert Hyatt 07:21:12 08/19/03
- Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Gian-Carlo Pascutto 02:17:08 08/19/03
  - Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Omid David Tabibi 02:25:25 08/19/03
    - Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Steve Maughan 04:20:27 08/19/03
      - Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Omid David Tabibi 06:05:09 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Tord Romstad 09:25:30 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Dan Andersson 10:56:53 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Uri Blass 14:48:20 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Dan Andersson 14:57:38 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Russell Reagan 13:37:40 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Dan Andersson 14:12:21 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Peter Fendrich 14:26:43 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Dieter Buerssner 15:02:10 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Russell Reagan 14:29:46 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Peter Fendrich 14:59:59 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Sune Fischer 13:55:33 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Dan Andersson 14:53:35 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Sune Fischer 11:59:45 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Dan Andersson 12:24:59 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Sune Fischer 13:12:20 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Andrew Williams 10:30:56 08/20/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Dan Andersson 14:48:59 08/20/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Tord Romstad 08:52:18 08/21/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Dan Andersson 09:12:25 08/21/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Tord Romstad 11:48:33 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Dan Andersson 12:21:23 08/19/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Tord Romstad 08:57:03 08/21/03
        
        Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Dan Andersson 16:22:44 08/21/03
    - Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?) Gian-Carlo Pascutto 02:30:26 08/19/03

This page took 0.02 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.