Author: Eelco de Groot
Date: 16:03:25 05/22/99
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On May 22, 1999 at 14:34:12, Andrew Dados wrote: > >On May 22, 1999 at 12:53:55, Stefan Meyer-Kahlen wrote: > >>Just two questions concerning ELO performance and probabilities: >> >>* How do I calculate my ELO performance if I get x percent out of y games >>against an opponent with z ELO points? >> >>* In which range is my own ELO rating with 95% probability after that match? >> >>I guess those are FAQs with 95% probability :-) >> >>Thanks >> Stefan > > > Quick (and dirty) formula for perf. rating against player rated X : > > p.r= X+400*(W-L)/T; >where W,L,T being wins,loses and total games respectively... > Andrew For an even rougher mental approximation I always use '7 points per %', so for instance ELO performance = 7(x%-50%) + z. Only works well if x is not to far from 50%.
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