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Individual Calculations September 2021 |
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| Chen, Rachel R Total change: 127.20 | |   |
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| 26th Annual Pacific Coast Open - Under 2100 | Van Nuys, California | USA | 2021-07-30 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1498 | 1502 | 3.00 | 3 | 1.47 | 40 | 58.80 | |
|  Sathish, Pranav | | | 1470 | USA | 1.00 | 1 | 0.46 | 40 | 18.40 | | | Schmitt, Ryan L | | | 1780 | USA | 1.00 | 1 | 0.83 | 40 | 33.20 | |  Nanugonda, Vishva | | | 1245 | USA | 1.00 | 1 | 0.18 | 40 | 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) | | | | 2021 North American Youth Chess Championships - Girls Under 14 | Chicago, Illinois | USA | 2021-08-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1483 | 1502 | 5.50 | 7 | 1.71 | 40 | 68.40 | |
| | Evans, Serena | | | 1415 | USA | 1.00 | 1 | 0.38 | 40 | 15.20 | | | Tang, Zoey | | | 1902 * | USA | 0.50 | 1 | 0.42 | 40 | 16.80 | | | Kaur, Aradh | | | 1436 | USA | 1.00 | 1 | 0.41 | 40 | 16.40 | | | Rajaram, Anika | | wc | 1513 | USA | 0.50 | 1 | 0.02 | 40 | 0.80 | | | Durbha, Antara | | | 1356 | USA | 1.00 | 1 | 0.30 | 40 | 12.00 | | | Wen, Kally | | wc | 1460 | USA | 0.50 | 1 | -0.06 | 40 | -2.40 | | | Yang, Adelynne | | | 1297 | USA | 1.00 | 1 | 0.24 | 40 | 9.60 | | | * 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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