Individual Calculations July 2009
 Sierra, Edwin Andres  Total change: -8.25  Rating chartPersonal card
 IRT Juan Mila Inmemorian ABS Bogota COL 2009-04-08
 2037 2144 2.00 4 -0.55 15 -8.25 
  Castano, Duvan Martin 2265 COL0.001-0.3415-5.10 
  Guerrero, Hernando 1993 COL1.0010.30154.50 
  Portnoy Cruz, Ivan Adolfo 2003 COL0.001-0.6915-10.35 
  Carvajal Doria, Alvaro 1886 COL1.0010.18152.70 

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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