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

Author: Peter Kappler

Date: 10:20:03 02/08/03

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On February 08, 2003 at 06:28:00, Dave Gomboc wrote:

>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


Yep, that's a very good point.  He asks for feedback at the bottom of the
article.  You should send him email at jeff@chessmetrics.com.

-Peter



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