Individual Calculations July 2009
 Gulko, Boris  Total change: -15.50  Rating chartPersonal card
 2009 US Championship St. Louis, Missouri USA 2009-05-07
 2454 2561 3.50 8 -1.55 10 -15.50 
  Hughes, Tyler B 2230 USA0.001-0.8810-8.80 
  Robson, Ray m2465 USA0.001-0.6310-6.30 
  Krush, Irina mwg2452 USA0.001-0.6510-6.50 
  Eckert, Doug D f2275 USA1.0010.16101.60 
  Ibragimov, Ildar g2586 USA0.5010.03100.30 
  Shabalov, Alexander g2569 USA0.5010.01100.10 
  Becerra, Julio J g2609 USA0.5010.07100.70 
  Shankland, Samuel m2446 USA1.0010.34103.40 

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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