Individual Calculations October 2019
 Willow, Jonah B  Total change: 24.80  Rating chartPersonal card
 1st Welsh Masters Bridgend WLS 2019-08-26
 2251 2326 6.50 9 1.24 20 24.80 
  Varley, Peter f2171 WLS1.0010.29205.80 
  Arkell, Keith C g2445 ENG0.5010.16203.20 
  Kett, Tim 2245 WLS1.0010.39207.80 
  Turner, Matthew J g2519 SCO0.001-0.2520-5.00 
  Toczek, Grzegorz f2246 WLS1.0010.39207.80 
  James, Dai 1926  * WLS1.0010.08201.60 
  Rudd, Jack m2281 ENG0.501-0.0620-1.20 
  Taylor, Adam C f2402 ENG0.5010.10202.00 
  Waddington, Mike P f2023 ENG1.0010.14202.80 
 * 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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