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Individual Calculations June 2023 |
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| Kothalawala, Ramath Hansaka Total change: -22.80 | |   |
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| Supr Knights Open International Rating Chess Championship 2023 | Colombo | SRI | 2023-04-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1397 | 1125 | 0.50 | 1 | 0.33 | 40 | 13.20 | |
|  Jayasundara, J M Theruni V | | | 1397 | SRI | 0.50 | 1 | 0.33 | 40 | 13.20 | |
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 Youth Chess Championship 2023 - Under 10Yrs Open | Colombo | SRI | 2023-04-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1099 | 1125 | 0.50 | 2 | -0.57 | 40 | -22.80 | |
|  Hettiarachchi, H A Ovindu Abhilas | | | 1034 | SRI | 0.50 | 1 | -0.12 | 40 | -4.80 | | | Samaraweera, S M Sethika Hansira | | | 1163 | SRI | 0.00 | 1 | -0.45 | 40 | -18.00 | |
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) | | | | Colombo International Chess Festival 2023 | Colombo | SRI | 2023-05-12 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1412 | 1125 | 0.00 | 2 | -0.33 | 40 | -13.20 | |
| | Mathes Arachchi, Bhanila M | | | 1488 | SRI | 0.00 | 1 | -0.10 | 40 | -4.00 | | | Chamathka, W A Chethani | | | 1335 | SRI | 0.00 | 1 | -0.23 | 40 | -9.20 | |
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) | | |
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