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Individual Calculations September 2009 |
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| Sattar, Ahmed Ma. Total change: -24.75 | |   |
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| African Youth Chess Championships 2009 (u14 Boys) | Cape Town | RSA | 2009-07-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1619 | 1621 | 0.00 | 2 | -1.01 | 25 | -25.25 | |
|  Du Toit, Stefan M. | | | 1637 | RSA | 0.00 | 1 | -0.48 | 25 | -12.00 | |  Modi, Jaishil B. | | | 1600 | RSA | 0.00 | 1 | -0.53 | 25 | -13.25 | |
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) | | | | Egy Open 1st Part | Cairo | EGY | 2009-07-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2021 | 1621 | 0.50 | 2 | 0.34 | 25 | 8.50 | |
| | Hegazy, Elhassan | | | 2021 * | EGY | 0.50 | 1 | 0.42 | 25 | 10.50 | | | Tork, Mohamed | | | 2021 * | EGY | 0.00 | 1 | -0.08 | 25 | -2.00 | | | * Rating difference of more than 400. Please read more at FIDE Handbook |
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) | | | | 5th Asiut International Open | Asiut | EGY | 2009-08-04 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2021 | 1621 | 0.00 | 4 | -0.32 | 25 | -8.00 | |
| | Raslan, Moustafa | | | 2021 * | EGY | 0.00 | 1 | -0.08 | 25 | -2.00 | | | Sayed, Hany | | | 2021 * | EGY | 0.00 | 1 | -0.08 | 25 | -2.00 | | | Shehata, Aly | | | 2021 * | EGY | 0.00 | 1 | -0.08 | 25 | -2.00 | | | Abdein, Ahmed | | | 2021 * | EGY | 0.00 | 1 | -0.08 | 25 | -2.00 | | | * Rating difference of more than 400. Please read more at FIDE Handbook |
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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