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Individual Calculations September 2015 |
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| Punchihewa, Geeneth Devmika Total change: 50.80 | |   |
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| National Amateur Chess Championship 2015 | Colombo | SRI | 2015-08-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1413 | 1175 | 1.00 | 3 | 0.39 | 40 | 15.60 | |
|  Dahanayake, Kalindu | | | 1443 | SRI | 0.50 | 1 | 0.33 | 40 | 13.20 | |  Gamage, Ovin Vidmal | | | 1425 | SRI | 0.00 | 1 | -0.19 | 40 | -7.60 | | | Wijesinghe, N L C Dojitha | | | 1370 | SRI | 0.50 | 1 | 0.25 | 40 | 10.00 | |
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 |
| 1443 | 1175 | 2.00 | 6 | 0.88 | 40 | 35.20 | |
| | Dayananda, I D Kolitha | | | 1575 * | SRI | 1.00 | 1 | 0.92 | 40 | 36.80 | | | Ranasinghe, Shalini | | | 1552 | SRI | 0.00 | 1 | -0.09 | 40 | -3.60 | | | Kodikara, K K M Sachintha | | wc | 1439 | SRI | 0.50 | 1 | 0.32 | 40 | 12.80 | | | Tennakoonwela, Pamudie Sasankha | | | 1406 | SRI | 0.00 | 1 | -0.21 | 40 | -8.40 | | | Roshan, K | | | 1366 | SRI | 0.00 | 1 | -0.25 | 40 | -10.00 | | | Perera, U I Himal | | | 1320 | SRI | 0.50 | 1 | 0.19 | 40 | 7.60 | | | * 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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