Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: I need help with Search/Selective Extension

Author: Georg v. Zimmermann

Date: 02:54:06 08/25/02

Go up one level in this thread


Using the kind of extensions you describe should greatly improve your
performance on GCP's WAC and other tactical testsets. If it doesnt, something is
not only going sub-optimal but probably very wrong.


You should do some statistics about the # of recapture-extensions, check
extensions, forcing extensions etc. That should give you some ideas of what
might be wrong.

It seems like you extend a full ply on recapture ? That is too much. If you
can't do fractional extensions you might want to consider limiting recapture
extensions to the leafs or to the root or do something more scalable like

if ((recapture) && (ply < currentDepth *2)) extensions += ONE_PLY;

where ply is the depth from the root at this point in the search and
currentDepth is the current iteration of iterative deepening.

Best regards,

Georg v. Zimmermann



This page took 0 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.