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Individual Calculations July 2009 |
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| Jayawardena, Mihiranga Total change: 34.50 | |   |
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| Colombo Major Chess Championship 2009 | Colombo | SRI | 2009-04-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1881 | 1920 | 2.00 | 4 | -0.20 | 15 | -3.00 | |
|  Peiris, T.s.s. | | | 1938 | SRI | 0.50 | 1 | 0.03 | 15 | 0.45 | | | Premachandra, D. | | | 1833 | SRI | 1.00 | 1 | 0.38 | 15 | 5.70 | |  Kuruwitage, Yasas Kalana | | | 1961 | SRI | 0.00 | 1 | -0.44 | 15 | -6.60 | | | Munasinghe, Shanaka | | | 1791 | SRI | 0.50 | 1 | -0.17 | 15 | -2.55 | |
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) | | | | Sri Lanka B Chess Championship 2009 | Colombo | SRI | 2009-05-09 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1974 | 1920 | 4.50 | 8 | 1.08 | 15 | 16.20 | |
| | Senaka, Rajeendra | | | 2126 | SRI | 0.00 | 1 | -0.24 | 15 | -3.60 | | | Jayarathne, M.n.g. | | | 1756 | SRI | 1.00 | 1 | 0.28 | 15 | 4.20 | | | Mallawarachchi, T.s. | | | 2075 | SRI | 0.00 | 1 | -0.29 | 15 | -4.35 | | | Rajapakshe, R.m.t.c. | | | 1642 | SRI | 1.00 | 1 | 0.17 | 15 | 2.55 | | | Perera, L.n | | | 1987 | SRI | 1.00 | 1 | 0.59 | 15 | 8.85 | | | Gunasinghe, S.r. | | | 1940 | SRI | 0.50 | 1 | 0.03 | 15 | 0.45 | | | Kurukulasuriya, Prasanna | | | 2085 | SRI | 0.50 | 1 | 0.22 | 15 | 3.30 | | | Weerawardena, R. | | | 2180 | SRI | 0.50 | 1 | 0.32 | 15 | 4.80 | |
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 National Chess Championship 2009 | Colombo | SRI | 2009-06-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2078 | 1920 | 5.00 | 12 | 1.42 | 15 | 21.30 | |
| | Kottahachchy, K O V | | | 2050 | SRI | 1.00 | 1 | 0.68 | 15 | 10.20 | | | Wijekoon, Chandana | | | 1965 | SRI | 0.00 | 1 | -0.44 | 15 | -6.60 | | | Kalugampitiya, R S | | | 2126 | SRI | 0.00 | 1 | -0.24 | 15 | -3.60 | | | Gunasinghe, S R | | | 1940 | SRI | 0.50 | 1 | 0.03 | 15 | 0.45 | | | Kurukulasuriya, Prasanna | | | 2085 | SRI | 1.00 | 1 | 0.72 | 15 | 10.80 | | | Wijesuriya, G Luxman | | | 2049 | SRI | 1.00 | 1 | 0.67 | 15 | 10.05 | | | Edirisinghe, Dulan | | | 2128 | SRI | 0.00 | 1 | -0.23 | 15 | -3.45 | | | Mallawarachchi, T S | | | 2075 | SRI | 0.00 | 1 | -0.29 | 15 | -4.35 | | | Annurudha, G C | | | 2187 | SRI | 1.00 | 1 | 0.82 | 15 | 12.30 | | | Russell, M K A | | | 2241 | SRI | 0.00 | 1 | -0.13 | 15 | -1.95 | | | Peiris, T G M | | | 2129 | SRI | 0.00 | 1 | -0.23 | 15 | -3.45 | | | Hapuarachchi, H L M | | | 1963 | SRI | 0.50 | 1 | 0.06 | 15 | 0.90 | |
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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