Individual Calculations May 2018
 Pratley, Ian  Total change: -7.00  Rating chartPersonal card
 CCF WINTER CHESS LONG PLAY RESULTS APRIL A London ENG 2018-04-02
RcRownchangeKK*chgGame
 1629 1558 0.50 2 -0.35 20 -7.00 
  George, Olufemi 1824 NGR0.001-0.1820-3.60 
  Howes, David J 1434 ENG0.501-0.1720-3.40 

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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