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Subject: Re: ELO & statistics question

Author: Gian-Carlo Pascutto

Date: 07:23:32 04/26/02

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On April 26, 2002 at 10:11:02, Jorge wrote:

>On April 26, 2002 at 09:29:26, Gian-Carlo Pascutto wrote:
>
>>Given a score from a series of games, y, we can calculate
>>the ELO difference between the two players as:
>>
>>x = -400*log((1-y)/y)
>>
>>My question is now, how do we calculate the error margins
>>on this value?
>>
>>--
>>GCP
>
>Maybe I am missing something here, but, this formula is not taking into account
>W,L,or D. So for example if total games were y=20, the ELO difference x is the
>same for a player that won 20-0 vs. a player that went 10-10? I don't get it.

y = score, not number fo games

There is a difference between scoring 20/0 (+inf) and 10/20 (=0.5)

--
GCP



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