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Individual Calculations September 2021 |
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| Vittal, Sanjana Total change: 20.80 | |   |
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| 9th Annual WIM Ruth Haring National Tournament of Girls State Champions | Cherry Hill, New Jersey | USA | 2021-07-31 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1659 | 1938 | 3.50 | 5 | -0.56 | 40 | -22.40 | |
|  Tien, Sophie | | | 1696 | USA | 0.00 | 1 | -0.80 | 40 | -32.00 | |  Tammali, Vaishnavi | | | 1538 * | USA | 1.00 | 1 | 0.08 | 40 | 3.20 | | | Woods, Charisse | | | 1636 | USA | 1.00 | 1 | 0.15 | 40 | 6.00 | | | Kumar, Arya | | | 1887 | USA | 0.50 | 1 | -0.07 | 40 | -2.80 | | | Liu, Kelsey | | | 1538 * | USA | 1.00 | 1 | 0.08 | 40 | 3.20 | | | * 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) | | | | 2021 North American Youth Chess Championships - Girls Under 18 | Chicago, Illinois | USA | 2021-08-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1828 | 1920 | 6.00 | 8 | 1.08 | 40 | 43.20 | |
| | Benito De Leo, Estefania | | | 1651 | MEX | 1.00 | 1 | 0.17 | 40 | 6.80 | | | Lee, Alice Teresa | | wc | 1994 | USA | 1.00 | 1 | 0.60 | 40 | 24.00 | | | Kumar, Arya | | | 1804 | USA | 0.50 | 1 | -0.16 | 40 | -6.40 | | | Hoesley, Aria | | | 1949 | USA | 0.50 | 1 | 0.04 | 40 | 1.60 | | | Ehsani, Yassamin | | wf | 1923 | USA | 0.50 | 1 | 0.00 | 40 | 0.00 | | | Prasanna, Gracy Franco | | | 1897 | USA | 0.50 | 1 | -0.03 | 40 | -1.20 | | | Gaw, Chloe | | | 1685 | USA | 1.00 | 1 | 0.21 | 40 | 8.40 | | | Wisniowski, Natali | | wc | 1723 | USA | 1.00 | 1 | 0.25 | 40 | 10.00 | |
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) | | |
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