Author: James T. Walker
Date: 08:58:21 10/13/99
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On October 13, 1999 at 05:19:33, Ratko V Tomic wrote: >Could someone post a formula or a table for ELO difference >computation from the percentage of wins/points? (The error >estimation based on # of games would also be interesting.) Hello Ratko, In my opinion the simplest formula is PR= Rc +400(W-L)/N. (No need for Log table) Where: PR=Performance Rating Rc=Average rating of opponents W=Wins L=Losses Example. You play 5 games vs opponents averaging 1900. You have 3 wins 1 loss and 1 draw. PR=1900 + 400(3-1)/5 PR=1900 + 400x2/5 PR=1900 + 800/5 PR=1900 + 160 = 2060 Jim Walker
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