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Individual Calculations February 2020 |
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| Wijeratne, Rehan Nawantha Total change: 51.20 | |   |
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| Sri Lanka National Amateur Chess Championship 2019 | Colombo | SRI | 2019-12-19 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1233 | 1213 | 2.00 | 4 | 0.09 | 40 | 3.60 | |
|  Gunasekara, Randil | | | 1010 | SRI | 1.00 | 1 | 0.24 | 40 | 9.60 | |  Kulathilake, S M M P | | | 1471 | SRI | 0.50 | 1 | 0.32 | 40 | 12.80 | | | Morais, Sanithu Leander Pamudith | | | 1421 | SRI | 0.00 | 1 | -0.23 | 40 | -9.20 | | | Samarakoon, Vivash Ransara | | | 1030 | SRI | 0.50 | 1 | -0.24 | 40 | -9.60 | |
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 2019 - Under 11 years | Colombo | SRI | 2019-12-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1149 | 1213 | 3.50 | 5 | 0.57 | 40 | 22.80 | |
| | Dharan, A | | | 1086 | SRI | 1.00 | 1 | 0.33 | 40 | 13.20 | | | Thennakoon, Disara | | | 1131 | SRI | 1.00 | 1 | 0.39 | 40 | 15.60 | | | Perera, G Thinuka Geethula | | | 1147 | SRI | 1.00 | 1 | 0.41 | 40 | 16.40 | | | Gunathilake, M D Vinuda Shenal | | | 1244 | SRI | 0.50 | 1 | 0.04 | 40 | 1.60 | | | Weerathungalage, W D Malisha Sasv | | | 1137 | SRI | 0.00 | 1 | -0.60 | 40 | -24.00 | |
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) | | | | Battle of the Kings - All Island Schools Team Chess Championship 2020 | Colombo | SRI | 2020-01-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1613 | 1213 | 0.50 | 2 | 0.34 | 40 | 13.60 | |
| | Kodithuwakku, Himsara | | | 1613 * | SRI | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Sivathanujan, S | | | 1613 * | SRI | 0.50 | 1 | 0.42 | 40 | 16.80 | | | * Rating difference of more than 400. Please read more at FIDE Handbook |
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) | | | | Kaluthara International Chess Festival 2020 | Kaluthara | SRI | 2020-01-15 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1162 | 1213 | 2.00 | 3 | 0.28 | 40 | 11.20 | |
| | Piyantha, M A G A | | | 1033 | SRI | 1.00 | 1 | 0.26 | 40 | 10.40 | | | Siriwardane, A L | | | 1438 | SRI | 0.00 | 1 | -0.22 | 40 | -8.80 | | | Mudalige, S M R S | | | 1014 | SRI | 1.00 | 1 | 0.24 | 40 | 9.60 | |
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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