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Subject: Re: Computer accounts DO cause ratings inflation

Author: Tim Mirabile

Date: 13:32:25 03/18/99

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On March 17, 1999 at 16:44:41, James B. Shearer wrote:

>        Actually as someone else pointed out it is wrong.  By the same logic if
>I started with gnuchess at 2300, moved to Hiarcs 7 at 2800 and then returned to
>to gnuchess at 2300 I would be causing ratings deflation.  This is equally
>wrong.  If I repeatedly move between 2300 and 2800 programs I am slightly
>perturbing the rating pool but there is no net long term effect.
>                           James B. Shearer

Except that it annoys people who lose points because of this, and skews some
ratings up and down in the short term.  If allowed to continue constantly it
would have the long term effect of making the whole system less accurate
(although neither inflated nor deflated).  Think of it as adding a random number
from +x and -x to each player's rating, where x depends upon the severity of the
problem.



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