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Subject: Re: SSDF Ratings Flawed?

Author: George Tsavdaris

Date: 06:45:40 07/06/03

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On July 06, 2003 at 09:11:53, David H. McClain wrote:

>The opponent's ELO versus Shredder are significantly lower than many lower rated
>programs.  Is this taken into consideration for a final evaluation of all
>programs?
>
Yes, absolutely.
For example:

In the previous SSDF list:
Shredder 7.0 has rating 2768 with 801 games and average opponent rating 2620.
In this list:
Shredder 7.0 has rating 2770 with 801(the same) games and average opponent
rating 2622.

The +2 point increase, come from the fact that played with opponents with
+2 points increase of their average ELO.
This is a coincidence and doesn't mean that a +X point increase, will be due to
+X points increase in his opponent's average ELO.



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