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Individual Calculations July 2009 |
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| Amarasena, Kavisha Total change: 6.00 | |   |
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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 |
| 1945 | 1908 | 2.50 | 4 | 0.70 | 15 | 10.50 | |
|  Peiris, T.s.s. | | | 1938 | SRI | 0.00 | 1 | -0.46 | 15 | -6.90 | |  Thirimavithana, R. | | | 1838 | SRI | 1.00 | 1 | 0.40 | 15 | 6.00 | | | Kottahachchy, K.o.v. | | | 2050 | SRI | 0.50 | 1 | 0.19 | 15 | 2.85 | | | De Silva, Rasheen | | | 1955 | SRI | 1.00 | 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) | | | | Galle Major Chess Championship 2009 | Galle | SRI | 2009-04-30 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1825 | 1908 | 3.00 | 4 | 0.55 | 15 | 8.25 | |
| | Manawadu, Dilhan | | | 1759 | SRI | 1.00 | 1 | 0.30 | 15 | 4.50 | | | Selvaratnam, Navodya | | | 1719 | SRI | 1.00 | 1 | 0.25 | 15 | 3.75 | | | Subash, Lasitha | | | 1880 | SRI | 0.50 | 1 | -0.04 | 15 | -0.60 | | | Gunasinghe, S.r. | | | 1940 | SRI | 0.50 | 1 | 0.04 | 15 | 0.60 | |
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 |
| 1918 | 1908 | 2.50 | 7 | -0.85 | 15 | -12.75 | |
| | Wijesuriya, G.l. | | | 2049 | SRI | 0.00 | 1 | -0.31 | 15 | -4.65 | | | Kuruwitage, Yasas Kalana | | | 1961 | SRI | 0.50 | 1 | 0.07 | 15 | 1.05 | | | Wijekoon, Chandana | | | 1965 | SRI | 0.00 | 1 | -0.42 | 15 | -6.30 | | | Perera, L.n | | | 1987 | SRI | 0.00 | 1 | -0.39 | 15 | -5.85 | | | Rajapakshe, R.m.t.c. | | | 1642 | SRI | 1.00 | 1 | 0.18 | 15 | 2.70 | | | Gunasinghe, W.a.t.s. | | | 1891 | SRI | 1.00 | 1 | 0.48 | 15 | 7.20 | | | Fernando, J.m.m.p. | | | 1934 | SRI | 0.00 | 1 | -0.46 | 15 | -6.90 | |
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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