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Subject: The big drop in the rating of my Fruit personality

Author: Uri Blass

Date: 07:10:58 10/17/05


I am now surprised by the big drop in the CEGT rating of my Fruit personality.

It was already 2806 after 92 games and now it is 2748 after 223 games.

I also remember possible error of 61 elo after 92 games but even if the real
rating is 61 elo lower than 2806 then I still do not expect the rating to change
so fast.

This is surprising also because results that I read earlier not by CEGT
supported my personality.

I wonder if the real error is not higher than the error that is written

I wonder what is the reason for the big drop and if there was no problem in the
matches against spike and Jonny that seem to be the main reason for the drop in
my personality(did the same tester play these matches?).

possible source of mistakes in the results.

1)testing in different hardware relative to previous fruit.

The claim of the CEGT is that they test with hardware that is equivalent to 2
ghz PIV but the problem is that there is no equivalence and it is possible that
one program likes more one processor and not another processor.

2)testing different positions and not the same positions that were tested by
earlier version.

3)testing against different opponents.

Uri



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