Individual Calculations February 2014
 Obrien, Matthew  Total change: 23.55  Rating chartPersonal card
 46th Annual Liberty Bell Open Philadelphia, Pennsylvania USA 2014-01-17
 2033 1941 3.50 5 1.57 15 23.55 
  Cortese, Anthony 1970 USA0.5010.04150.60 
  Margiotta, Jason J 1988 USA0.5010.07151.05 
  Feng, Maggie wc1878 USA0.501-0.0915-1.35 
  Katz, Benjamin J 2080 USA1.0010.691510.35 
  Kahn, Aaron E 2251 USA1.0010.861512.90 

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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