From: Larry Kaufman <lkaufman <at> COMCAST <dot> NET>
Date: 10 dec 2002
Subject: Re: Expectation value of winning percentage

> >I not understand how calculate 112. That is 112 = Function(7/10, 1835).
> >What should be this Function?
> >
>
> If I remember correctly, <score> = 1 / (1 + 10 ^ (-<delta Elo>/400)).
Larry,
> Asle, is that correct? If so, a score of 7/10 corresponds to 147 Elo
points
> difference.
>
> Ciao,
>
> Pieter

    Yes, that is the logistic function, one of two versions of the Elo
system (theother is Normal distribution,which is very similar except at
large differences.

Larry