Individual Calculations January 2012
 Petrova, Irina  Total change: -9.60  Rating chartPersonal card
 World Youth Chess Championship - U 18 Girls Caldas Novas/GO BRA 2011-11-18
 1992 2106 4.50 8 -0.64 15 -9.60 
  De Leon, Patricia 1800 URU1.0010.14152.10 
  Arabidze, Meri wm2329 GEO0.001-0.2215-3.30 
  Yu, Sally 1918 AUS0.501-0.2415-3.60 
  Le Bail, Arielle 1847 FRA0.501-0.3215-4.80 
  Lugo Lozano, Luz Adriana 1904 COL1.0010.24153.60 
  Hejazipour, Mitra wm2225 IRI0.5010.16152.40 
  Tallo, Emily 1954 USA0.001-0.7015-10.50 
  Orlova, Yelizaveta wc1955 CAN1.0010.30154.50 

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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