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Individual Calculations July 2009 |
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| Premachandra, D. Total change: 5.75 | |   |
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| Colombo Major Chess Championship 2009 | Colombo | SRI | 2009-04-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1942 | 1833 | 1.00 | 3 | -0.05 | 25 | -1.25 | |
|  Wijekoon, Chandana | | | 1965 | SRI | 0.50 | 1 | 0.18 | 25 | 4.50 | |  Jayawardena, Mihiranga | | | 1920 | SRI | 0.00 | 1 | -0.38 | 25 | -9.50 | | | Athavan, R.k. | | | 1941 | SRI | 0.50 | 1 | 0.15 | 25 | 3.75 | |
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 |
| 1952 | 1833 | 3.00 | 8 | 0.28 | 25 | 7.00 | |
| | Mallawarachchi, T.s. | | | 2075 | SRI | 0.00 | 1 | -0.20 | 25 | -5.00 | | | Perera, L.n | | | 1987 | SRI | 1.00 | 1 | 0.71 | 25 | 17.75 | | | Wijesuriya, G.l. | | | 2049 | SRI | 0.00 | 1 | -0.22 | 25 | -5.50 | | | Gunasinghe, S.r. | | | 1940 | SRI | 0.00 | 1 | -0.35 | 25 | -8.75 | | | Miraj, D.a. | | | 2024 | SRI | 1.00 | 1 | 0.75 | 25 | 18.75 | | | Fonseka, C.k.d. | | | 1999 | SRI | 0.50 | 1 | 0.22 | 25 | 5.50 | | | Wijekoon, Chandana | | | 1965 | SRI | 0.00 | 1 | -0.32 | 25 | -8.00 | | | Seneviratne, Shehan | | | 1580 | SRI | 0.50 | 1 | -0.31 | 25 | -7.75 | |
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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