Individual Calculations September 2009
 Al-Zayat, Ahmed  Total change: 2.70  Rating chartPersonal card
 2009 African Individual Chess Championship (gen) Tripoli LBA 2009-07-21
 2194 1969 2.00 8 0.18 15 2.70 
  Haddouche, Mohamed m2329 ALG0.001-0.1015-1.50 
  El, Kamel Adel Mahmoud 2239 TUN0.001-0.1715-2.55 
  Shabash, Abdullatief Mohamed 2193 LBA0.001-0.2215-3.30 
  Asabri, Hussien f2220 LBA0.5010.31154.65 
  Obiamiwe, Paul 2043 NGR0.001-0.4015-6.00 
  Salem, Ali Maoloud 2131 LBA0.5010.21153.15 
  Humrana, Mostafa 2114 LBA1.0010.691510.35 
  Chahrani, Ibrahim f2280 LBA0.001-0.1415-2.10 

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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