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Individual Calculations April 2009 |
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| Hapuarachchi, H.l.m. Total change: 25.50 | |   |
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| The Inaugural Royal Challenge International Chess Championship 2009 | Colombo | SRI | 2009-01-10 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2045 | 1937 | 6.00 | 8 | 3.10 | 15 | 46.50 | |
|  Kuruwitage, Yasas Kalana | | | 1938 | SRI | 1.00 | 1 | 0.50 | 15 | 7.50 | |  Peiris, T.g.m. | | | 2133 | SRI | 1.00 | 1 | 0.75 | 15 | 11.25 | | | Kalugampitiya, R.s. | | | 2115 | SRI | 1.00 | 1 | 0.73 | 15 | 10.95 | | | Russell, M.k.a. | | | 2209 | SRI | 0.00 | 1 | -0.17 | 15 | -2.55 | | | Egodage, Keshan | | | 1787 | SRI | 0.50 | 1 | -0.20 | 15 | -3.00 | | | Wijesuriya, G.luxman | | | 2065 | SRI | 1.00 | 1 | 0.67 | 15 | 10.05 | | | Fonseka, C.k.d. | | | 2020 | SRI | 1.00 | 1 | 0.61 | 15 | 9.15 | | | Kurukulasuriya, Prasanna | | | 2092 | SRI | 0.50 | 1 | 0.21 | 15 | 3.15 | |
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 Inter Club Super League 08 | Colombo | SRI | 2009-02-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1961 | 1937 | 2.00 | 5 | -0.39 | 15 | -5.85 | |
| | Thirimawithana, Raveen | | | 1854 | SRI | 1.00 | 1 | 0.39 | 15 | 5.85 | | | Edirisinghe, D | | | 2152 | SRI | 0.50 | 1 | 0.27 | 15 | 4.05 | | | Kumara, Sisira | | | 1827 | SRI | 0.50 | 1 | -0.15 | 15 | -2.25 | | | Russel, M.k.a. | | | 2209 | SRI | 0.00 | 1 | -0.17 | 15 | -2.55 | | | Vithana, C.c. | | | 1761 | SRI | 0.00 | 1 | -0.73 | 15 | -10.95 | |
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) | | | | 2nd Colombo Chess Festival '09 | Colombo | SRI | 2009-02-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1953 | 1937 | 0.50 | 3 | -1.00 | 15 | -15.00 | |
| | Deshmukh, Anup | m | | 2287 | IND | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Selvaratnam, Navodya | | | 1722 | SRI | 0.50 | 1 | -0.27 | 15 | -4.05 | | | Saranapala, Nimantha | | | 1851 | SRI | 0.00 | 1 | -0.62 | 15 | -9.30 | |
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 International Rating Chess Tournament 2009 | Kandy | SRI | 2009-03-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2056 | 1937 | 1.00 | 3 | -0.01 | 15 | -0.15 | |
| | Mallawarachchi, T.s. | | | 2091 | SRI | 0.00 | 1 | -0.29 | 15 | -4.35 | | | Madugalle, Y.d.b. | | | 2045 | SRI | 0.50 | 1 | 0.15 | 15 | 2.25 | | | Ketalawala, J.k.c. | | | 2033 | SRI | 0.50 | 1 | 0.13 | 15 | 1.95 | |
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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