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Individual Calculations May 2017 |
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| Kett, Tim Total change: 1.20 | |   |
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| Welsh Chess Premier League 2016/17 Round 4 | Merthyr | WLS | 2017-04-02 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2283 | 2220 | 1.00 | 1 | 0.59 | 20 | 11.80 | |
|  Williams, A. Howard | f | | 2283 | WLS | 1.00 | 1 | 0.59 | 20 | 11.80 | |
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) | | | | 2017 Welsh Championships | Cardiff | WLS | 2017-04-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1986 | 2220 | 5.00 | 7 | -0.53 | 20 | -10.60 | |
| | Waterfield, John W | | | 1948 | WLS | 1.00 | 1 | 0.17 | 20 | 3.40 | |  Ehsandar, Peter | | | 1933 | WLS | 1.00 | 1 | 0.16 | 20 | 3.20 | | | Rodriguez, Juan Talavera | | | 1988 | WLS | 1.00 | 1 | 0.21 | 20 | 4.20 | | | Jameson, David | | | 2098 | WLS | 0.50 | 1 | -0.17 | 20 | -3.40 | | | Pleasants, Allan J | | | 1982 | WLS | 0.00 | 1 | -0.80 | 20 | -16.00 | | | Heaven, Peter | | | 2022 | WLS | 0.50 | 1 | -0.26 | 20 | -5.20 | | | Turner, Joseph David | | | 1933 | WLS | 1.00 | 1 | 0.16 | 20 | 3.20 | |
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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