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Individual Calculations October 2017 |
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| Williams, Stephen Total change: 17.20 | |   |
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| South Wales Summer Congress 2017 | Penarth | WLS | 2017-09-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1966 | 1666 | 1.50 | 4 | 0.86 | 20 | 17.20 | |
|  Brown, Thomas | | | 2020 | WLS | 0.00 | 1 | -0.11 | 20 | -2.20 | |  Fathallah, Joe | | | 1959 | WLS | 0.50 | 1 | 0.35 | 20 | 7.00 | | | Buttell, David | | | 1817 | WLS | 1.00 | 1 | 0.70 | 20 | 14.00 | | | Kett, Tim | | | 2066 * | WLS | 0.00 | 1 | -0.08 | 20 | -1.60 | | | * 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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