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Individual Calculations February 2020 |
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| Karunarathne, D D W Gamini Total change: -4.00 | |   |
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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 |
| 1396 | 1220 | 1.00 | 3 | 0.06 | 20 | 1.20 | |
|  Galagamaarachchi, A S | | | 1620 * | SRI | 0.00 | 1 | -0.08 | 20 | -1.60 | | | Laksandu, R A Chamath | | | 1097 | SRI | 1.00 | 1 | 0.33 | 20 | 6.60 | |  Judedorison, G | | | 1472 | SRI | 0.00 | 1 | -0.19 | 20 | -3.80 | | | * 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 |
| 1290 | 1220 | 1.50 | 4 | -0.26 | 20 | -5.20 | |
| | De Silva, M W Sanuth Nihinsa | | | 1019 | SRI | 0.50 | 1 | -0.26 | 20 | -5.20 | | | Nirmalarajah, S | | | 1615 | SRI | 0.00 | 1 | -0.08 | 20 | -1.60 | | | Tennakoon, I L K | | | 1475 | SRI | 0.00 | 1 | -0.19 | 20 | -3.80 | | | Wijerathna, Mayon Thinoth | | | 1049 | SRI | 1.00 | 1 | 0.27 | 20 | 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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