Author: Eelco de Groot
Date: 06:32:14 04/16/05
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Hi Anson For a first order approximation, I always use 2812 - (50%-45%)*7 =2777, which is increasingly inaccurate with greater score-difference. Precise formula involves calculating an integral, which you can do numerically. I once wrote a little program for this for a Casio calculator, but that will not help you much I'm afraid without an explanation. It took the first order approximation and went from there. But it is not hard to do if you have the formula from professor Elo, Excel can do it too, easily. I don't have the formula at hand right now. But it is a nice programming excercise! Eelco On April 15, 2005 at 17:58:30, Anson T J wrote: >Does anyone know the accurate formula to work out ELO performance based on an >estimated elo for a player and the % success? > >For example if Hydra played against Kasparov (2812) and scored 45%, what how >would we work out Hydra's elo performance in this match? > >I remember somebody posted a very accurate formula using logs, if they could >point me to the post or write the formula again in here I would greatly >appreciate it. > >Many thanks.
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