From: "Stouten, Pieter [R&D/0467]" PHARMACIA COM> Date: 10 dec 2002 Subject: Expectation value of winning percentage 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, = 1 / (1 + 10 ^ (-/400)). Larry, Asle, is that correct? If so, a score of 7/10 corresponds to 147 Elo points difference. Ciao, Pieter