Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: estimating opening strength: how the heck does chessbase do it

Author: Dann Corbit

Date: 16:10:01 01/17/06

Go up one level in this thread


On January 17, 2006 at 18:38:43, Joseph Ciarrochi wrote:

>>The above formula assmes that the relationship is linear
>
>Yes, I'm afraid so. Welcome to the simplified world of psychology:)
>
> We could test for other kinds of relationships. Maybe the key variable would be
>a difference between black and white ELOS (this would simplify our analysis).
>Then we could look for say, a logarithmic relationship between this difference
>and performance. e.g., from 0 to 100 point difference, you get big difference in
>predicted performance. In contrast, from  500 to 600 point difference, you get
>little difference in predicted performance.

You could also use a Levenberg-Marquardt fit though a large collection of
elementary functions.

At any rate, a linear estimation would probably provide good answers at least
close to the solution points.  And it is probably less prone to error.



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.