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Individual Calculations May 2017 |
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| Waterfield, John W Total change: 25.00 | |   |
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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 |
| 2022 | 1948 | 0.50 | 1 | 0.10 | 20 | 2.00 | |
|  Hatchett, Paul | | | 2022 | WLS | 0.50 | 1 | 0.10 | 20 | 2.00 | |
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) | | | | 2017 Welsh Championships | Cardiff | WLS | 2017-04-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1965 | 1948 | 4.50 | 7 | 1.15 | 20 | 23.00 | |
|  Kett, Tim | | | 2220 | WLS | 0.00 | 1 | -0.17 | 20 | -3.40 | | | James, Dai | | | 1849 | WLS | 1.00 | 1 | 0.36 | 20 | 7.20 | | | Turner, Joseph David | | | 1933 | WLS | 0.00 | 1 | -0.52 | 20 | -10.40 | | | Sivarajasingam, Venetia | | wc | 1704 | WLS | 1.00 | 1 | 0.20 | 20 | 4.00 | | | Ralphs, Nigel | | | 2058 | WLS | 0.50 | 1 | 0.15 | 20 | 3.00 | | | Brown, Thomas | | | 2060 | WLS | 1.00 | 1 | 0.65 | 20 | 13.00 | | | Davis, Lee | | | 1933 | WLS | 1.00 | 1 | 0.48 | 20 | 9.60 | |
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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