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Individual Calculations May 2012 |
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| De Silva, Osheen Total change: 88.65 | |   |
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| Sri Lanka Major Division Chess Championship 2012 Galle | Galle | SRI | 2012-02-25 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1769 | 1933 | 5.00 | 5 | 1.49 | 15 | 22.35 | |
|  Ranasinghe, P K | | | 1593 | SRI | 1.00 | 1 | 0.12 | 15 | 1.80 | |  Ranmith, W S | | | 1738 | SRI | 1.00 | 1 | 0.25 | 15 | 3.75 | | | Lamahewa, C | | | 1843 | SRI | 1.00 | 1 | 0.38 | 15 | 5.70 | | | Thiyanga, Kaveen | | | 1750 | SRI | 1.00 | 1 | 0.26 | 15 | 3.90 | | | De Silva, Elath Mathanga | | | 1921 | SRI | 1.00 | 1 | 0.48 | 15 | 7.20 | |
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) | | | | Sri Lanka National B Chess Championship 2012 | Colombo | SRI | 2012-03-10 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1944 | 1889 | 6.50 | 10 | 2.29 | 15 | 34.35 | |
| | Dilshan, Akhila | | | 1585 | SRI | 1.00 | 1 | 0.14 | 15 | 2.10 | | | De Silva, Rasheen | | | 1957 | SRI | 1.00 | 1 | 0.59 | 15 | 8.85 | | | Jayasundara, Pkum | | | 2012 | SRI | 0.00 | 1 | -0.33 | 15 | -4.95 | | | Peiris, Tss | | | 2034 | SRI | 0.50 | 1 | 0.19 | 15 | 2.85 | | | Alahakoon, Amcb | | | 1941 | SRI | 1.00 | 1 | 0.57 | 15 | 8.55 | | | Saranga, Nco | | | 1954 | SRI | 0.50 | 1 | 0.09 | 15 | 1.35 | | | Dissanayake, Rs | | | 1978 | SRI | 1.00 | 1 | 0.62 | 15 | 9.30 | | | Koggala, Wsvk | | | 2020 | SRI | 0.50 | 1 | 0.18 | 15 | 2.70 | | | Alahakoon, Isuru | | | 1957 | SRI | 0.50 | 1 | 0.09 | 15 | 1.35 | | | Wijekoon, Chandana | | | 1997 | SRI | 0.50 | 1 | 0.15 | 15 | 2.25 | |
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) | | | | Sri Lanka National Chess Championship 2012 | Colombo | SRI | 2012-03-23 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2006 | 1889 | 5.50 | 13 | 1.01 | 15 | 15.15 | |
| | Alahakoon, Isuru | | | 1957 | SRI | 0.00 | 1 | -0.41 | 15 | -6.15 | | | Wimalasuriya, Kasun M | | | 1604 | SRI | 0.50 | 1 | -0.34 | 15 | -5.10 | | | Kurukulasuriya, Prasanna | | | 2078 | SRI | 0.00 | 1 | -0.25 | 15 | -3.75 | | | Madumadha, M Chaithika Samith | | | 1893 | SRI | 0.00 | 1 | -0.49 | 15 | -7.35 | | | Perera, W C C | | | 2126 | SRI | 0.00 | 1 | -0.20 | 15 | -3.00 | | | Weeramantry, Sunil | f | | 2177 | SRI | 1.00 | 1 | 0.84 | 15 | 12.60 | | | Anuruddha, G C | | | 2098 | SRI | 0.50 | 1 | 0.27 | 15 | 4.05 | | | Kalugampitiya, R S | | | 2126 | SRI | 1.00 | 1 | 0.80 | 15 | 12.00 | | | Wijekoon, Chandana | | | 1997 | SRI | 1.00 | 1 | 0.65 | 15 | 9.75 | | | Edirisinghe, Dulan | | | 2036 | SRI | 0.50 | 1 | 0.20 | 15 | 3.00 | | | Koggala, W S V K | | | 2020 | SRI | 0.50 | 1 | 0.18 | 15 | 2.70 | | | Jayasundara, P K U M | | | 2012 | SRI | 0.00 | 1 | -0.33 | 15 | -4.95 | | | Saranga, N C O | | | 1954 | SRI | 0.50 | 1 | 0.09 | 15 | 1.35 | |
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 Dhamso International Chess Festival | Ambalangoda | SRI | 2012-04-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1834 | 1889 | 5.00 | 7 | 1.12 | 15 | 16.80 | |
| | Welihinda, Ravindu Hansika | | | 1551 | SRI | 1.00 | 1 | 0.12 | 15 | 1.80 | | | Ranmith, W S | | | 1738 | SRI | 0.50 | 1 | -0.20 | 15 | -3.00 | | | De Silva, Shelani | | | 1559 | SRI | 1.00 | 1 | 0.12 | 15 | 1.80 | | | Liyanage, N P | | | 1905 | SRI | 1.00 | 1 | 0.52 | 15 | 7.80 | | | Anuruddha, G C | | | 2098 | SRI | 0.50 | 1 | 0.27 | 15 | 4.05 | | | Wijekoon, Chandana | | | 1997 | SRI | 0.50 | 1 | 0.15 | 15 | 2.25 | | | De Silva, Gihan | | | 1993 | SRI | 0.50 | 1 | 0.14 | 15 | 2.10 | |
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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