Author: Marc Boulé
Date: 07:20:43 01/03/04
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>The Arena gui, during matches, outputs an "elo difference" value on the taskbar, >based on the current match result. What kind of formula can be used to compute >an elo difference such as this? > >Regards >Dave Dave, Perhaps something like this: elo_diff = -400*log(1/win_ratio - 1) It can be obtained by solving for "Ra-Rb" in equation (1) from [1] on page 10, and replacing the Expected outcome by the win_ratio. [1] M. E. Glickman. A comprehensive guide to chess ratings. http://math.bu.edu/people/mg/research.html, 1995. Marc Boulé
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