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Individual Calculations July 2009 |
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| Perera, Jayasanka Total change: -0.75 | |   |
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| Colombo Major Chess Championship 2009 | Colombo | SRI | 2009-04-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1857 | 1820 | 3.00 | 5 | 0.80 | 25 | 20.00 | |
|  Athavan, R.k. | | | 1941 | SRI | 0.50 | 1 | 0.16 | 25 | 4.00 | |  Munasinghe, Lahiru | | | 1920 | SRI | 0.50 | 1 | 0.14 | 25 | 3.50 | | | Kodithuwakku, Gihan | | | 1527 | SRI | 1.00 | 1 | 0.15 | 25 | 3.75 | | | Wijekoon, Chandana | | | 1965 | SRI | 0.50 | 1 | 0.19 | 25 | 4.75 | | | Fernando, J.m.m.p. | | | 1934 | SRI | 0.50 | 1 | 0.16 | 25 | 4.00 | |
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 B Chess Championship 2009 | Colombo | SRI | 2009-05-09 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1950 | 1820 | 0.50 | 4 | -0.83 | 25 | -20.75 | |
| | Kottahachchy, K.o.v | | | 2050 | SRI | 0.00 | 1 | -0.21 | 25 | -5.25 | | | Kuruwitage, Yasas Kalana | | | 1961 | SRI | 0.00 | 1 | -0.31 | 25 | -7.75 | | | Fonseka, C.k.d. | | | 1999 | SRI | 0.00 | 1 | -0.27 | 25 | -6.75 | | | Munasinghe, Shanaka | | | 1791 | SRI | 0.50 | 1 | -0.04 | 25 | -1.00 | |
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) | | |
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