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Individual Calculations September 2021 |
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| Zhou, Chelsea Total change: 104.00 | |   |
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| Mechanics Institute Tuesday Night Marathon July-August 2021 - Open | San Francisco, California | USA | 2021-07-13 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1781 | 1525 | 2.50 | 5 | 1.51 | 40 | 60.40 | |
|  Weng, Nicholas | | | 1676 | USA | 0.00 | 1 | -0.30 | 40 | -12.00 | |  Guo, Andrew | | | 1678 | USA | 0.00 | 1 | -0.30 | 40 | -12.00 | | | Persidsky, Andre | | | 1785 | USA | 0.50 | 1 | 0.32 | 40 | 12.80 | | | Argo, Guy | | | 1845 | USA | 1.00 | 1 | 0.87 | 40 | 34.80 | | | Clemens, Kristian | | | 1919 | USA | 1.00 | 1 | 0.92 | 40 | 36.80 | |
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 16 | Chicago, Illinois | USA | 2021-08-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1536 | 1583 | 5.50 | 8 | 1.09 | 40 | 43.60 | |
| | Szeto, Sophie | | | 1271 | USA | 0.50 | 1 | -0.36 | 40 | -14.40 | | | Bilodeau-Savaria, Sandy-Rose | | | 1338 | CAN | 1.00 | 1 | 0.20 | 40 | 8.00 | | | Eswaran, Aksithi | | wc | 1755 | USA | 0.00 | 1 | -0.27 | 40 | -10.80 | | | Luster, Shakira | | | 1427 | USA | 1.00 | 1 | 0.29 | 40 | 11.60 | | | De Dios Suarez, Mayra Valentina | | | 1537 | MEX | 1.00 | 1 | 0.44 | 40 | 17.60 | | | Liu, Kelsey | | | 1628 | USA | 0.00 | 1 | -0.44 | 40 | -17.60 | | | Baalla, Nura | | | 1730 | USA | 1.00 | 1 | 0.70 | 40 | 28.00 | | | Kumar, Asha | | | 1601 | USA | 1.00 | 1 | 0.53 | 40 | 21.20 | |
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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