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Subject: Re: Standard deviations -- how many games?

Author: Kolss

Date: 23:31:18 01/23/04

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On January 23, 2004 at 21:39:15, Bob Durrett wrote:

>On January 23, 2004 at 21:27:43, Dann Corbit wrote:
>
>>On January 23, 2004 at 21:08:27, Bob Durrett wrote:
>>
>>>On January 23, 2004 at 15:24:31, Dann Corbit wrote:
>>>

>I am not sure about the quality of published ratings of chess-playing programs,
>but the published FIDE ratings for humans are based on prior games.  In a sense,
>one could consider the current tournament as being an addendum or extension to
>the total global "tournament."  [I hope you know what I mean.]  When results of
>a tournament are used to calculate new ratings , the results of the games played
>in the past have a LOT to do with the computed new ratings for the experienced
>players.  I'm sure you agree.

Hi,

I agree with that. It is called Baysian statistics - you update a prior estimate
by your new data to obtain a new, posterior estimate.

Best regards - Munjong.



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