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Individual Calculations April 2009 |
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| Jayawardena, Mihiranga Total change: -0.75 | |   |
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| The Inaugural Royal Challenge International Chess Championship 2009 | Colombo | SRI | 2009-01-10 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1978 | 1921 | 1.50 | 4 | -0.18 | 25 | -4.50 | |
|  Dissanayake, R.s. | | | 2045 | SRI | 0.50 | 1 | 0.17 | 25 | 4.25 | | | Munasinghe, Shanaka | | | 1755 | SRI | 0.50 | 1 | -0.22 | 25 | -5.50 | |  Kurukulasuriya, Prasanna | | | 2092 | SRI | 0.50 | 1 | 0.23 | 25 | 5.75 | | | Fonseka, C.k.d. | | | 2020 | SRI | 0.00 | 1 | -0.36 | 25 | -9.00 | |
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) | | | NOTE: K factor changed | | 2nd Colombo Chess Festival '09 | Colombo | SRI | 2009-02-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2121 | 1921 | 0.50 | 4 | -0.50 | 15 | -7.50 | |
| | Russell, M.k.a. | | | 2209 | SRI | 0.00 | 1 | -0.16 | 15 | -2.40 | | | Weerawardena, Romesh | | | 2127 | SRI | 0.00 | 1 | -0.24 | 15 | -3.60 | | | Navalgund, Niranjan | | | 2056 | IND | 0.50 | 1 | 0.18 | 15 | 2.70 | | | Mallawarachchi, T.s. | | | 2091 | SRI | 0.00 | 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) | | | NOTE: K factor changed | | Sri Lanka Open International Rating Chess Tournament 2009 | Kandy | SRI | 2009-03-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2046 | 1921 | 2.50 | 5 | 0.75 | 15 | 11.25 | |
| | Narayanan, Srinath | m | | 2271 | IND | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Ketalawala, J.k.c. | | | 2033 | SRI | 0.50 | 1 | 0.15 | 15 | 2.25 | | | Mallawarachchi, T.s. | | | 2091 | SRI | 1.00 | 1 | 0.72 | 15 | 10.80 | | | Kalugampitiya, Rajeendra | | | 2115 | SRI | 0.00 | 1 | -0.25 | 15 | -3.75 | | | Selvaratnam, Navodya | | | 1722 | SRI | 1.00 | 1 | 0.24 | 15 | 3.60 | |
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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