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Individual Calculations July 2009 |
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| Kuruwitage, Yasas Kalana Total change: 1.50 | |   |
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| Sri Lanka Junior National Chess Championship 2009 | Colombo | SRI | 2009-04-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1838 | 1961 | 0.50 | 1 | -0.17 | 25 | -4.25 | |
|  Thirimavithana, R. | | | 1838 | SRI | 0.50 | 1 | -0.17 | 25 | -4.25 | |
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) | | | | Colombo Major Chess Championship 2009 | Colombo | SRI | 2009-04-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1897 | 1961 | 3.00 | 4 | 0.65 | 25 | 16.25 | |
| | Munasinghe, Shanaka | | | 1791 | SRI | 1.00 | 1 | 0.28 | 25 | 7.00 | |  Fernando, J.m.m.p. | | | 1934 | SRI | 1.00 | 1 | 0.46 | 25 | 11.50 | | | Athavan, R.k. | | | 1941 | SRI | 0.00 | 1 | -0.53 | 25 | -13.25 | | | Jayawardena, Mihiranga | | | 1920 | SRI | 1.00 | 1 | 0.44 | 25 | 11.00 | |
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) | | | NOTE: K factor changed | | Sri Lanka B Chess Championship 2009 | Colombo | SRI | 2009-05-09 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1942 | 1961 | 3.00 | 7 | -0.70 | 15 | -10.50 | |
| | Anuruddha, G.c. | | | 2187 | SRI | 0.00 | 1 | -0.21 | 15 | -3.15 | | | Perera, Jayasanka | | | 1820 | SRI | 1.00 | 1 | 0.31 | 15 | 4.65 | | | Amarasena, Kaveesha | | | 1908 | SRI | 0.50 | 1 | -0.07 | 15 | -1.05 | | | Gunasinghe, W.a.t.s. | | | 1891 | SRI | 0.50 | 1 | -0.10 | 15 | -1.50 | | | Perera, L.n | | | 1987 | SRI | 0.00 | 1 | -0.46 | 15 | -6.90 | | | Pinto, Semuthu | | | 1887 | SRI | 1.00 | 1 | 0.40 | 15 | 6.00 | | | Alahakoon, A.m.c.b. | | | 1911 | SRI | 0.00 | 1 | -0.57 | 15 | -8.55 | |
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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