Individual Calculations September 2009
 Zaibi, Amir  Total change: 37.50  Rating chartPersonal card
 2009 African Individual Chess Championship (gen) Tripoli LBA 2009-07-21
 2301 2123 5.00 9 2.50 15 37.50 
  Frhat, Ali m2397 EGY1.0010.831512.45 
  Abdelnabbi, Imed m2452 EGY0.001-0.1215-1.80 
  Haddouche, Mohamed m2329 ALG0.001-0.2415-3.60 
  Asabri, Hussien f2220 LBA1.0010.63159.45 
  Humrana, Mostafa 2114 LBA1.0010.49157.35 
  Kaabi, Mejdi m2313 TUN0.5010.25153.75 
  Sarwat, Walaa m2390 EGY0.001-0.1815-2.70 
  Van Den Heever, Donovan c2254 RSA0.5010.18152.70 
  Nyazi, Nehad 2237 EGY1.0010.66159.90 

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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