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Individual Calculations April 2009 |
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| Alahakoon, Isuru Total change: -30.25 | |   |
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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 |
| 1993 | 1977 | 1.00 | 4 | -0.93 | 25 | -23.25 | |
|  Egodage, Keshan | | | 1787 | SRI | 1.00 | 1 | 0.25 | 25 | 6.25 | | | Russell, M.k.a. | | | 2209 | SRI | 0.00 | 1 | -0.21 | 25 | -5.25 | |  Munasinghe, Lahiru | | | 1860 | SRI | 0.00 | 1 | -0.66 | 25 | -16.50 | | | Kalugampitiya, R.s. | | | 2115 | SRI | 0.00 | 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) | | | | Sri Lanka Inter Club Super League 08 | Colombo | SRI | 2009-02-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2035 | 1977 | 1.00 | 2 | 0.16 | 25 | 4.00 | |
| | Herath, Np | | | 2005 | SRI | 1.00 | 1 | 0.54 | 25 | 13.50 | | | Wijesuriya, Gl | | | 2065 | SRI | 0.00 | 1 | -0.38 | 25 | -9.50 | |
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 |
| 1889 | 1977 | 2.00 | 4 | -0.44 | 25 | -11.00 | |
| | Peiris, T.g.m. | | | 2133 | SRI | 0.00 | 1 | -0.29 | 25 | -7.25 | | | Samarakone, U.l. | | | 1876 | SRI | 0.00 | 1 | -0.64 | 25 | -16.00 | | | Premanath, Dinushki | | | 1703 | SRI | 1.00 | 1 | 0.17 | 25 | 4.25 | | | Pinto, Semuthu | | | 1845 | SRI | 1.00 | 1 | 0.32 | 25 | 8.00 | |
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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