Individual Calculations September 2017
 Parfett, Gerald F  Total change: -20.00  Rating chartPersonal card
 104th British Championships Under 1750 Llandudno ENG 2017-07-31
 1456 1653 2.00 4 -1.00 20 -20.00 
  Miles, Barry S 1502 ENG0.501-0.2020-4.00 
  Fraser, Alan R 1374 ENG1.0010.16203.20 
  Coleman, Frederick 1516 ENG0.501-0.1820-3.60 
  Foster, Paul 1432 ENG0.001-0.7820-15.60 

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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