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Individual Calculations July 2021 |
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| Weber, Madeline L Total change: -8.80 | |   |
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| 30th Annual Chicago Open - Under 2100 | Wheeling, Illinois | USA | 2021-05-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1475 | 1752 | 1.00 | 2 | -0.63 | 40 | -25.20 | |
|  Ren, Jesse | | | 1597 | USA | 0.00 | 1 | -0.71 | 40 | -28.40 | |  Kumar, Sanjay | | | 1352 * | 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 US Women's Open | Las Vegas, Nevada | USA | 2021-06-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1384 | 1752 | 2.00 | 2 | 0.20 | 40 | 8.00 | |
| | Zhang, Ellie | | | 1416 | USA | 1.00 | 1 | 0.12 | 40 | 4.80 | | | Zhang, Elena | | | 1352 * | 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 National Open - Under 2300 | Las Vegas, Nevada | USA | 2021-06-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2056 | 1752 | 0.50 | 2 | 0.21 | 40 | 8.40 | |
| | Radermacher, Timothy | | | 2014 | USA | 0.50 | 1 | 0.32 | 40 | 12.80 | | | Sosa, Nestor R | c | | 2097 | PAN | 0.00 | 1 | -0.11 | 40 | -4.40 | |
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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