Individual Calculations January 2011
 Villarreal, Brian  Total change: -2.75  Rating chartPersonal card
 1st North American Amateur Closed Section I Skokie,IL USA 2010-11-19
RcRownchangeKK*chgGame
 1843 1852 4.50 9 -0.11 25 -2.75 
  Miller, Steven C 2012 USA0.001-0.2925-7.25 
  Kosteris, Dimitri 1823 USA0.001-0.5425-13.50 
  Vitkauskas, Vytautas 1718 USA1.0010.32258.00 
  Stone, George W 1932 USA1.0010.612515.25 
  Craigmile, Charles 1669 USA1.0010.26256.50 
  Girardo, Christopher 1718 USA0.501-0.1825-4.50 
  Mei, Mike 1867 USA0.5010.02250.50 
  Pullin, Matthew 1942 USA0.001-0.3825-9.50 
  Richmond, M Barrie 1905 USA0.5010.07251.75 

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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