Individual Calculations March 2010
 Piasetski, Leon  Total change: -4.80  Rating chartPersonal card
 Schaakfestival Groningen 2009 Open A Groningen NED 2009-12-21
 2281 2269 3.50 8 -0.48 10 -4.80 
  Chadaev, Nikolai m2567 RUS0.001-0.1510-1.50 
  Bijlsma, Nick 2075 NED0.001-0.7510-7.50 
  Vergert Ten, Paul 2071 NED1.0010.24102.40 
  Efroimski, Marsel wf2150 ISR0.501-0.1610-1.60 
  Groenewold, Jan Joris 2145 NED0.501-0.1710-1.70 
  Nabuurs, Joep 2191 NED1.0010.39103.90 
  Ernst, Sipke g2587 NED0.001-0.1310-1.30 
  Burg, Twan f2460 NED0.5010.25102.50 

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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