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Subject: Re: Jeff Sonas' proposal for an improved rating system

Author: Dave Gomboc

Date: 03:28:00 02/08/03

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On February 08, 2003 at 03:30:34, Peter Kappler wrote:

>
>He has some good ideas.
>
>http://www.worldchessrating.com/521683950.html?529637011233717
>
>-Peter

The one thing that always bugs me about Sonas's stuff is that he takes the data,
does some fitting on it, then says "see, this fits the data better!".  Well, of
course it does!  What he should do is have training data that is *distinct* from
his testing data, e.g. tune his formulae on results from (for example)
1990-1995, then test on (for example) 1996-2000.  Tuning on 1990-2000, then
testing on 1990-2000 is bogus.

Dave



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