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Individual Calculations April 2009 |
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| Jayasundara, P.k.u.m. Total change: 20.25 | |   |
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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 |
| 1989 | 1885 | 1.50 | 3 | 0.42 | 15 | 6.30 | |
|  Kuruwitage, Yasas Kalana | | | 1938 | SRI | 0.00 | 1 | -0.43 | 15 | -6.45 | | | Subhani, D.ashraf | | | 1994 | IND | 1.00 | 1 | 0.65 | 15 | 9.75 | |  Kottahachchy, K.o.v. | | | 2034 | SRI | 0.50 | 1 | 0.20 | 15 | 3.00 | |
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) | | | | 2nd Colombo Chess Festival '09 | Colombo | SRI | 2009-02-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2121 | 1885 | 1.00 | 3 | 0.38 | 15 | 5.70 | |
| | Anududdha, Chinthaka | | | 2173 | SRI | 1.00 | 1 | 0.84 | 15 | 12.60 | | | Peiris, T.g.m. | | | 2133 | SRI | 0.00 | 1 | -0.19 | 15 | -2.85 | | | Navalgund, Niranjan | | | 2056 | IND | 0.00 | 1 | -0.27 | 15 | -4.05 | |
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 Open International Rating Chess Tournament 2009 | Kandy | SRI | 2009-03-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2109 | 1885 | 1.00 | 2 | 0.55 | 15 | 8.25 | |
| | Anuruddha, G.c. | | | 2173 | SRI | 0.50 | 1 | 0.34 | 15 | 5.10 | | | Madugalle, Y.d.b. | | | 2045 | SRI | 0.50 | 1 | 0.21 | 15 | 3.15 | |
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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