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Individual Calculations July 2009 |
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| Kottahachchy, K.o.v. Total change: -14.10 | |   |
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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 |
| 1932 | 2050 | 2.50 | 4 | -0.14 | 15 | -2.10 | |
|  Amarasinghe, A.a.c.b.j.b. | | | 1901 | SRI | 1.00 | 1 | 0.30 | 15 | 4.50 | |  De Silva, Rasheen | | | 1955 | SRI | 0.50 | 1 | -0.13 | 15 | -1.95 | | | Hapuarachchi, H.l.m. | | | 1963 | SRI | 0.50 | 1 | -0.12 | 15 | -1.80 | | | Amarasena, Kavisha | | | 1908 | SRI | 0.50 | 1 | -0.19 | 15 | -2.85 | |
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 |
| 1922 | 2050 | 5.50 | 9 | -0.56 | 15 | -8.40 | |
| | Perera, Jayasanka | | | 1820 | SRI | 1.00 | 1 | 0.21 | 15 | 3.15 | | | Alahakoon, A.m.c.b. | | | 1911 | SRI | 0.50 | 1 | -0.19 | 15 | -2.85 | | | Fernando, J.m.m.p. | | | 1934 | SRI | 0.50 | 1 | -0.16 | 15 | -2.40 | | | Munasinghe, Lahiru | | | 1920 | SRI | 1.00 | 1 | 0.32 | 15 | 4.80 | | | De Moraes, Shamin | | | 1951 | SRI | 0.00 | 1 | -0.64 | 15 | -9.60 | | | Gunasinghe, S.r. | | | 1940 | SRI | 0.00 | 1 | -0.65 | 15 | -9.75 | | | Wijekoon, Chandana | | | 1965 | SRI | 0.50 | 1 | -0.12 | 15 | -1.80 | | | Perera, W.c.c. | | | 1917 | SRI | 1.00 | 1 | 0.32 | 15 | 4.80 | | | Peiris, T.s.s. | | | 1938 | SRI | 1.00 | 1 | 0.35 | 15 | 5.25 | |
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) | | | | Sri Lanka National Chess Championship 2009 | Colombo | SRI | 2009-06-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2067 | 2050 | 5.50 | 12 | -0.24 | 15 | -3.60 | |
| | Jayawardena, M | | | 1920 | SRI | 0.00 | 1 | -0.68 | 15 | -10.20 | | | Kurukulasuriya, Prasanna | | | 2085 | SRI | 1.00 | 1 | 0.55 | 15 | 8.25 | | | Wijesuriya, G Luxman | | | 2049 | SRI | 0.50 | 1 | 0.00 | 15 | 0.00 | | | Edirisinghe, Dulan | | | 2128 | SRI | 0.50 | 1 | 0.11 | 15 | 1.65 | | | Mallawarachchi, T S | | | 2075 | SRI | 0.50 | 1 | 0.03 | 15 | 0.45 | | | Annurudha, G C | | | 2187 | SRI | 0.50 | 1 | 0.18 | 15 | 2.70 | | | Russell, M K A | | | 2241 | SRI | 0.00 | 1 | -0.25 | 15 | -3.75 | | | Peiris, T G M | | | 2129 | SRI | 0.50 | 1 | 0.11 | 15 | 1.65 | | | Hapuarachchi, H L M | | | 1963 | SRI | 0.50 | 1 | -0.12 | 15 | -1.80 | | | Wijekoon, Chandana | | | 1965 | SRI | 0.50 | 1 | -0.12 | 15 | -1.80 | | | Kalugampitiya, R S | | | 2126 | SRI | 0.00 | 1 | -0.40 | 15 | -6.00 | | | Gunasinghe, S R | | | 1940 | SRI | 1.00 | 1 | 0.35 | 15 | 5.25 | |
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) | | |
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