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Individual Calculations July 2013 |
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| Brattain, Mika Andrew Total change: 22.50 | |   |
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| 82nd Massachusetts Open | Marlboro, Massachusetts | USA | 2013-05-25 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2320 | 2160 | 2.00 | 4 | 0.75 | 30 | 22.50 | |
|  Perez, Robert M | | | 2359 | USA | 0.00 | 1 | -0.24 | 30 | -7.20 | | | Salomon, Brian D | | | 2067 | USA | 1.00 | 1 | 0.37 | 30 | 11.10 | |  Kelleher, William | f | | 2323 | USA | 1.00 | 1 | 0.72 | 30 | 21.60 | | | Ivanov, Alexander | g | | 2529 | USA | 0.00 | 1 | -0.10 | 30 | -3.00 | |
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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