Individual Calculations January 2018
 Sellen, John R  Total change: 18.60  Rating chartPersonal card
 9th CSC London Chess Classic: Weekday U1750 London ENG 2017-12-04
RcRownchangeKK*chgGame
 1690 1528 1.50 2 0.93 20 18.60 
  Illingworth, John B 1659 ENG0.5010.18203.60 
  Grey, Nicholas D 1720 ENG1.0010.752015.00 

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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