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Individual Calculations September 2015 |
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| Perera, D Upashan L Total change: 7.60 | |   |
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| National Amateur Chess Championship 2015 | Colombo | SRI | 2015-08-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1456 | 1179 | 1.00 | 5 | 0.13 | 40 | 5.20 | |
|  Abhimanyu, Iraja | | | 1576 | SRI | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Fernando, J S Aloka | | | 1414 | SRI | 0.00 | 1 | -0.21 | 40 | -8.40 | | | Dissanayake, Kamesh Janaja | | | 1383 | SRI | 1.00 | 1 | 0.76 | 40 | 30.40 | |  Gamage, Ovin Vidmal | | | 1425 | SRI | 0.00 | 1 | -0.19 | 40 | -7.60 | | | Gunasekara , W A N Senpathi | | | 1481 | SRI | 0.00 | 1 | -0.15 | 40 | -6.00 | |
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) | | | | Sri Lanka Open Chess Championship 2015 | Colombo | SRI | 2015-08-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1485 | 1179 | 1.00 | 6 | 0.06 | 40 | 2.40 | |
| | Tourkine, N | | | 1579 * | FRA | 1.00 | 1 | 0.92 | 40 | 36.80 | | | Kotalawala, Vinodh | | | 1579 * | SRI | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Premarathne, H R S P | | | 1422 | SRI | 0.00 | 1 | -0.20 | 40 | -8.00 | | | Fernando, J S Aloka | | | 1414 | SRI | 0.00 | 1 | -0.21 | 40 | -8.40 | | | Kumarawadu, C S | | | 1579 * | SRI | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Iru Kumarasiri, W M G | | | 1339 | SRI | 0.00 | 1 | -0.29 | 40 | -11.60 | | | * 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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