Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Alpha-Beta Conspiracy Search

Author: Anthony Cozzie

Date: 17:15:28 10/04/03

Go up one level in this thread


On October 04, 2003 at 18:30:05, Dan Andersson wrote:

> I'm currently trying out Lambda Search and Generalized Threats Search. Before
>that it was PN,PN^2 and PSS. Combining, mixing and matching ideas. Too many
>ideas, too little time...
>PSS: http://www.t-t.dk/go/cg2000/index.html
>Lambda Search: http://www.t-t.dk/go/cg2000/index.html
>GTS: http://www.ai.univ-paris8.fr/~cazenave/
>
>MvH Dan Andersson

I took a look at some of those references.  I may be making some mistakes as I
did not completely analyze the papers.

Lamba search seems to be uninteresting for chess (except for mate solvers) as it
assumes 0/1 (white can mate/white can't mate).

PSS (did you notice that that Muller guy spent **12** years as a Ph.D or
postdoc) seems to have very limited applications to chess.   Go subdivides
spatially quite nicely, chess does not: a Bishop on B1 has an effect on the King
at G8, etc.  Plus I admit I got a little lost as every other word was
"combinatorics".

It seems to me that Alpha-beta (and variants) work fine for chess search.  Most
of the work left more engineering than science: figure out good evaluation and
extension/pruning methods.  Go, being a much more complex game, is still in the
"science" stage.  Alpha-beta is prohibitively expensive there.

anthony



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.