Individual Calculations September 2009
 Salem, Ali Maoloud  Total change: -26.10  Rating chartPersonal card
 2009 African Individual Chess Championship (gen) Tripoli LBA 2009-07-21
 2220 2131 1.00 7 -1.74 15 -26.10 
  Arab, Adlane m2432 ALG0.001-0.1515-2.25 
  Frhat, Ali m2397 EGY0.5010.32154.80 
  Van Den Heever, Donovan c2254 RSA0.001-0.3315-4.95 
  Nyazi, Nehad 2237 EGY0.001-0.3615-5.40 
  Solomons, Deon c2210 RSA0.001-0.3915-5.85 
  Al-Zayat, Ahmed 1969 LBA0.501-0.2115-3.15 
  Obiamiwe, Paul 2043 NGR0.001-0.6215-9.30 

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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