Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Mobility in Chess Evaluation Function at terminal-nodes

Author: Stuart Cracraft

Date: 18:12:01 12/28/05

Go up one level in this thread


On December 28, 2005 at 15:22:56, Roman Hartmann wrote:

>I just added mobility to my eval and while it kills my kN/s (brought them from
>1000kN/s down to around 100kN/s) it doesn't seem to hurt the play. But I guess I
>have to let it play some games first before I make a conclusion. If it's
>improving the positional play without causing too much tactical dammage I will
>add a stripped down movegenerator for mobility as I have now quite some overhead
>having a legal-move-generator with incremental eval (means the eval is in the
>movegenerator).
>
>Thanks for your experiment.
>
>Roman

Good point - I stripped out move list sorting and SEE calculation for
my move generation used in the mobility function.

The program plays into better positions in Arena against other programs.

Practically it seems useful from a real-game perspective.

In test suites, the results are not greater than 1% worse on a standard
tactical suite.

For me, the above is enough to include it in the permanent program, regardless
of its effect on nps. Nps is a marketing term not useful for comparing programs!

Stuart



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.