Individual Calculations October 2017
 Van Der Westhuizen, Donald  Total change: 13.60  Rating chartPersonal card
 2017 Etienne Lewis Tshwane Chess Trails (Open) Pretoria RSA 2017-08-31
RcRownchangeKK*chgGame
 1654 1690 2.50 4 0.34 40 13.60 
  Cruywagen, Dewan 1388 RSA1.0010.15406.00 
  Ponelis, Albert A. 1932 RSA0.001-0.2040-8.00 
  Booysen, Willem-Hendrik 1515 RSA1.0010.274010.80 
  Khumalo, Keith 1779 RSA0.5010.12404.80 

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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