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Individual Calculations July 2009 |
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| Hapuarachchi, H.l.m. Total change: 38.25 | |   |
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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 |
| 1936 | 1963 | 1.50 | 4 | -0.64 | 15 | -9.60 | |
|  Thirimavithana, R. | | | 1838 | SRI | 0.50 | 1 | -0.17 | 15 | -2.55 | | | Kottahachchy, K.o.v. | | | 2050 | SRI | 0.50 | 1 | 0.12 | 15 | 1.80 | |  Peiris, T.s.s. | | | 1938 | SRI | 0.50 | 1 | -0.03 | 15 | -0.45 | | | Perera, W.c.c. | | | 1917 | SRI | 0.00 | 1 | -0.56 | 15 | -8.40 | |
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) | | | | Kandy Major Chess Championship 2009 | Kandy | SRI | 2009-04-25 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1819 | 1963 | 1.00 | 2 | -0.36 | 15 | -5.40 | |
| | Lamawansa, Yasas | | | 1721 | SRI | 0.50 | 1 | -0.30 | 15 | -4.50 | | | Perera, W.c.c | | | 1917 | 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) | | | | Sri Lanka B Chess Championship 2009 | Colombo | SRI | 2009-05-09 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1891 | 1963 | 5.00 | 8 | 0.31 | 15 | 4.65 | |
| | Seneviratne, Shehan | | | 1613 | SRI | 1.00 | 1 | 0.11 | 15 | 1.65 | | | Peiris, T.s.s. | | | 1938 | SRI | 0.00 | 1 | -0.53 | 15 | -7.95 | | | Alahakoon, Isuru | | | 1947 | SRI | 0.00 | 1 | -0.52 | 15 | -7.80 | | | Lamawansa, Yasas | | | 1721 | SRI | 1.00 | 1 | 0.20 | 15 | 3.00 | | | Perera, W.c.c. | | | 1917 | SRI | 0.50 | 1 | -0.06 | 15 | -0.90 | | | Gunasinghe, W.a.t.s. | | | 1891 | SRI | 1.00 | 1 | 0.40 | 15 | 6.00 | | | Alahakoon, A.m.c.b. | | | 1911 | SRI | 1.00 | 1 | 0.43 | 15 | 6.45 | | | Anuruddha, G.c. | | | 2187 | SRI | 0.50 | 1 | 0.28 | 15 | 4.20 | |
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 |
| 2075 | 1963 | 7.50 | 12 | 3.24 | 15 | 48.60 | |
| | Kurukulasuriya, Prasanna | | | 2085 | SRI | 1.00 | 1 | 0.67 | 15 | 10.05 | | | Wijesuriya, G Luxman | | | 2049 | SRI | 0.50 | 1 | 0.12 | 15 | 1.80 | | | Edirisinghe, Dulan | | | 2128 | SRI | 0.50 | 1 | 0.22 | 15 | 3.30 | | | Mallawarachchi, T S | | | 2075 | SRI | 1.00 | 1 | 0.65 | 15 | 9.75 | | | Annurudha, G C | | | 2187 | SRI | 0.00 | 1 | -0.22 | 15 | -3.30 | | | Russell, M K A | | | 2241 | SRI | 1.00 | 1 | 0.83 | 15 | 12.45 | | | Peiris, T G M | | | 2129 | SRI | 0.00 | 1 | -0.28 | 15 | -4.20 | | | Kottahachchy, K O V | | | 2050 | SRI | 0.50 | 1 | 0.12 | 15 | 1.80 | | | Wijekoon, Chandana | | | 1965 | SRI | 1.00 | 1 | 0.50 | 15 | 7.50 | | | Kalugampitiya, R S | | | 2126 | SRI | 1.00 | 1 | 0.72 | 15 | 10.80 | | | Gunasinghe, S R | | | 1940 | SRI | 0.50 | 1 | -0.03 | 15 | -0.45 | | | Jayawardena, M | | | 1920 | 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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