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Individual Calculations September 2021 |
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| Evans, Serena Total change: -48.80 | |   |
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| 4th Annual Peter Henner Memorial - Under 2100 | Albany, New York | USA | 2021-07-30 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1486 | 1415 | 0.50 | 2 | -0.38 | 40 | -15.20 | |
|  Bihlmeyer, Joseph E | | | 1780 | USA | 0.50 | 1 | 0.40 | 40 | 16.00 | |  Qian, Bobby | | | 1192 | USA | 0.00 | 1 | -0.78 | 40 | -31.20 | |
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) | | | | 2021 North American Youth Chess Championships - Girls Under 14 | Chicago, Illinois | USA | 2021-08-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1499 | 1415 | 2.00 | 7 | -0.84 | 40 | -33.60 | |
| | Chen, Rachel Ruoxu | | | 1502 | CAN | 0.00 | 1 | -0.38 | 40 | -15.20 | | | Gomez Camara, Sofia | | | 1432 | MEX | 0.50 | 1 | 0.02 | 40 | 0.80 | | | Durbha, Antara | | | 1356 | USA | 0.00 | 1 | -0.58 | 40 | -23.20 | | | Gupta, Sara | | | 1576 | USA | 1.00 | 1 | 0.71 | 40 | 28.40 | | | Yang, Adelynne | | | 1297 | USA | 0.50 | 1 | -0.16 | 40 | -6.40 | | | Tang, Zoey | | | 1815 * | USA | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Rajaram, Anika | | wc | 1513 | USA | 0.00 | 1 | -0.37 | 40 | -14.80 | | | * 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) | | |
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