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Individual Calculations April 2008 |
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| Kottahachchy, K O V Total change: 132.60 | |   |
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| Sri Lanka National B Chess Championships 2007 | Colombo | SRI | 2007-07-21 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2080 | 1801 | 4.50 | 8 | 3.15 | 25 | 78.75 | |
|  , Wijesuriya.g.l | | | 2151 | SRI | 1.00 | 1 | 0.89 | 25 | 22.25 | |  De, Silva Gihan Kanch | | | 2058 | SRI | 0.50 | 1 | 0.32 | 25 | 8.00 | | | Weerawardane, R | | | 2151 | SRI | 1.00 | 1 | 0.89 | 25 | 22.25 | | | Siriwardena, D.i.s | | | 1981 | SRI | 0.50 | 1 | 0.24 | 25 | 6.00 | | | Kuruppu, Danuke | | | 2094 | SRI | 0.50 | 1 | 0.35 | 25 | 8.75 | | | Telge, Peiris Gayan | | | 1999 | SRI | 0.50 | 1 | 0.26 | 25 | 6.50 | | | Anurudda, G.c. | | | 2151 | SRI | 0.00 | 1 | -0.11 | 25 | -2.75 | | | Kurukulasuriya, Prasa | | | 2052 | SRI | 0.50 | 1 | 0.31 | 25 | 7.75 | |
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) | | | NOTE: K factor changed | | Sri Lanka National A Chess Championships 2007 | Colombo | SRI | 2007-10-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2013 | 1799 | 6.00 | 13 | 2.77 | 15 | 41.55 | |
| | Russell, M K A | | | 2149 | SRI | 0.50 | 1 | 0.39 | 15 | 5.85 | | | Ketalawala, J.k.c. | | | 1716 | SRI | 0.50 | 1 | -0.11 | 15 | -1.65 | | | De, Silwa N Rashin | | | 1969 | SRI | 0.50 | 1 | 0.22 | 15 | 3.30 | | | Edirisinghe, Dulan | | | 2149 | SRI | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Rajapaksha, Rmcm | | | 2108 | SRI | 0.50 | 1 | 0.36 | 15 | 5.40 | | | Wijesurija, G Laxman | | | 2105 | SRI | 1.00 | 1 | 0.86 | 15 | 12.90 | | | Annurudha, G C | | | 2149 | SRI | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Dissanayake, Rs | | | 2038 | SRI | 0.50 | 1 | 0.30 | 15 | 4.50 | | | Kurukulasuriya, Prasanna | | | 2052 | SRI | 0.00 | 1 | -0.19 | 15 | -2.85 | | | Nishendra, Herath | | | 1980 | SRI | 0.50 | 1 | 0.24 | 15 | 3.60 | | | Kuruppu, Danuke | | | 2094 | SRI | 0.50 | 1 | 0.35 | 15 | 5.25 | | | Amarakoon, Naditha Thilanga | | | 1661 | SRI | 1.00 | 1 | 0.31 | 15 | 4.65 | | | Telge, Peiris Gayan Madushanka | | | 1999 | SRI | 0.50 | 1 | 0.26 | 15 | 3.90 | |
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) | | | NOTE: K factor changed | | 3rd Asian Schools Chess Festival under 15 Boys | Kandy | SRI | 2008-01-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1928 | 1797 | 1.50 | 3 | 0.52 | 15 | 7.80 | |
| | Kasthuri, Arachchill Akkila Kavi | | | 1995 | SRI | 0.50 | 1 | 0.26 | 15 | 3.90 | | | Ajmera, Atishay | | | 1902 | IND | 0.50 | 1 | 0.14 | 15 | 2.10 | | | Hapuarachchi, H.l.m. | | | 1886 | SRI | 0.50 | 1 | 0.12 | 15 | 1.80 | |
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) | | | NOTE: K factor changed | | Colombo International Chess Festival | Colombo | SRI | 2008-02-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2021 | 1797 | 1.00 | 3 | 0.30 | 15 | 4.50 | |
| | Girinath, P.d.s. | m | | 2147 | IND | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Hettiarachchi, A.u. | | | 2030 | SRI | 0.50 | 1 | 0.29 | 15 | 4.35 | | | Hapuarachchi, H L M | | | 1886 | SRI | 0.50 | 1 | 0.12 | 15 | 1.80 | |
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) | | |
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