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Individual Calculations April 2009 |
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| Amarasinghe, A.a.c.b.j.b. Total change: -24.50 | |   |
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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 |
| 1897 | 1925 | 1.00 | 3 | -0.62 | 25 | -15.50 | |
|  Kurukulasuriya, Prasanna | | | 2092 | SRI | 0.00 | 1 | -0.28 | 25 | -7.00 | |  Egodage, Keshan | | | 1787 | SRI | 1.00 | 1 | 0.31 | 25 | 7.75 | | | Prasanna, Krishna B. | | | 1812 | IND | 0.00 | 1 | -0.65 | 25 | -16.25 | |
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) | | | | 2nd Colombo Chess Festival '09 | Colombo | SRI | 2009-02-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1954 | 1925 | 1.50 | 4 | -0.36 | 25 | -9.00 | |
| | Selvaratnam, Navodya | | | 1722 | SRI | 1.00 | 1 | 0.24 | 25 | 6.00 | | | Kumara, Sisira | | | 1827 | SRI | 0.50 | 1 | -0.13 | 25 | -3.25 | | | Kurukulasuriya, Prasanna | | | 2092 | SRI | 0.00 | 1 | -0.28 | 25 | -7.00 | | | Anududdha, Chinthaka | | | 2173 | SRI | 0.00 | 1 | -0.19 | 25 | -4.75 | |
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) | | |
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