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Individual Calculations July 2009 |
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| Peiris, T.s.s. Total change: 57.00 | |   |
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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 |
| 1969 | 1938 | 3.00 | 4 | 1.16 | 25 | 29.00 | |
|  Amarasena, Kavisha | | | 1908 | SRI | 1.00 | 1 | 0.46 | 25 | 11.50 | |  De Silva, Rasheen | | | 1955 | SRI | 1.00 | 1 | 0.52 | 25 | 13.00 | | | Hapuarachchi, H.l.m. | | | 1963 | SRI | 0.50 | 1 | 0.03 | 25 | 0.75 | | | Madugalle, Y.d.b. | | | 2050 | 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) | | | | Colombo Major Chess Championship 2009 | Colombo | SRI | 2009-04-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1854 | 1938 | 3.00 | 4 | 0.62 | 25 | 15.50 | |
| | Kodithuwakku, Gihan | | | 1588 | SRI | 1.00 | 1 | 0.11 | 25 | 2.75 | | | Jayawardena, Mihiranga | | | 1920 | SRI | 0.50 | 1 | -0.03 | 25 | -0.75 | | | Athavan, R.k. | | | 1941 | SRI | 1.00 | 1 | 0.50 | 25 | 12.50 | | | Wijekoon, Chandana | | | 1965 | SRI | 0.50 | 1 | 0.04 | 25 | 1.00 | |
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) | | | | Sri Lanka B Chess Championship 2009 | Colombo | SRI | 2009-05-09 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2049 | 1938 | 3.00 | 7 | 0.50 | 25 | 12.50 | |
| | Peiris, T.g.m. | | | 2129 | SRI | 0.50 | 1 | 0.25 | 25 | 6.25 | | | Hapuarachchi, H.l.m. | | | 1963 | SRI | 1.00 | 1 | 0.53 | 25 | 13.25 | | | Senaka, Rajeendra | | | 2126 | SRI | 0.00 | 1 | -0.26 | 25 | -6.50 | | | Weerawardena, R. | | | 2180 | SRI | 0.50 | 1 | 0.30 | 25 | 7.50 | | | Alahakoon, A.m.c.b. | | | 1911 | SRI | 0.50 | 1 | -0.04 | 25 | -1.00 | | | Perera, L.n | | | 1987 | SRI | 0.50 | 1 | 0.07 | 25 | 1.75 | | | Kottahachchy, K.o.v | | | 2050 | SRI | 0.00 | 1 | -0.35 | 25 | -8.75 | |
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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