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Individual Calculations April 2009 |
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| De Silva, Osheen Total change: -16.50 | |   |
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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 |
| 1925 | 2016 | 2.00 | 5 | -1.10 | 15 | -16.50 | |
|  Prasanna, Krishna B. | | | 1812 | IND | 0.00 | 1 | -0.76 | 15 | -11.40 | | | Kuruwitage, Yasas Kalana | | | 1938 | SRI | 0.50 | 1 | -0.11 | 15 | -1.65 | | | Pinto, Semuthu | | | 1845 | SRI | 0.50 | 1 | -0.23 | 15 | -3.45 | |  Amarasena, Kaveesha | | | 1915 | SRI | 1.00 | 1 | 0.36 | 15 | 5.40 | | | Kalugampitiya, R.s. | | | 2115 | SRI | 0.00 | 1 | -0.36 | 15 | -5.40 | |
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) | | |
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