Individual Calculations July 2009
 Williams, John R  Total change: -13.50  Rating chartPersonal card
 2009 Lina Grumette Memorial Day Classic Los Angeles, California USA 2009-05-23
 2139 2122 1.50 5 -0.90 15 -13.50 
  Yanayt, Eugene f2207 USA0.5010.12151.80 
  Dellaca, Roger 2020 USA1.0010.36155.40 
  Porter, Ryan W f2284 USA0.001-0.2915-4.35 
  Gutman, Joshua 2138 USA0.001-0.4815-7.20 
  Kitagami, Show 2045 USA0.001-0.6115-9.15 

Rc - average rating of rated opponents, Ro - rating of a player in a tournament, Rp - rating performance of an unrated player, W - points won in a tournament against rated opponents, N - total number of games against rated opponents, Change - change used for calculation according to formula, K - development coefficient, Kchg - rating change of a player calculated as (K * change)


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