Individual Calculations October 2017
 Cox, John  Total change: 13.40  Rating chartPersonal card
 3rd Welsh Seniors Championship Penarth WLS 2017-09-01
 1678 1430 1.50 4 0.67 20 13.40 
  James, Dai 1830  * WLS0.001-0.0820-1.60 
  Williams, Ron 1692 WLS1.0010.822016.40 
  Probert, Malcolm 1600 WLS0.001-0.2820-5.60 
  Parsons, David Ivor 1589 WLS0.5010.21204.20 
 * Rating difference of more than 400. Please read more at FIDE Handbook

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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