From: SECELLE JOHANNES F L A <johannes.secelle <at> MINFIN <dot> FED <dot> BE>
Date: 10 dec 2002
Subject: Re: Expectation value of winning percentage

I think Larry is right, for D=100, the W/L ratio is 64-36,
now I remember :-)

Hans

"Stouten, Pieter [R&D/0467]" schreef:

> Yury Shpilev wrote:
>
> >>a player scores 7/10, the average ELO of his 10 opponents being 1835
> >>scoring 70 pct. means being +/- 112 ELO-points stronger than the
> >>"opposition".
> >>
> >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