Individual Calculations September 2009
 Van Den Heever, Donovan  Total change: 12.30  Rating chartPersonal card
 2009 African Individual Chess Championship (gen) Tripoli LBA 2009-07-21
 2287 2254 5.00 9 0.82 15 12.30 
  Adly, Ahmed g2548 EGY0.001-0.1515-2.25 
  Ranaivoharisoa, Alain 2083 MAD0.501-0.2315-3.45 
  Salem, Ali Maoloud 2131 LBA1.0010.33154.95 
  Njili, Kamel f2318 TUN0.001-0.4115-6.15 
  Solomons, Deon c2210 RSA1.0010.44156.60 
  Arab, Adlane m2432 ALG1.0010.731510.95 
  Simutowe, Amon g2481 ZAM0.001-0.2115-3.15 
  Zaibi, Amir c2123 TUN0.501-0.1815-2.70 
  Wageih, Kareim m2257 EGY1.0010.50157.50 

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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