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Individual Calculations February 2018 |
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| Waterfield, John W Total change: -6.40 | |   |
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| South Wales New Year Open 2018 | Bridgend | WLS | 2018-01-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1930 | 1925 | 2.50 | 5 | 0.04 | 20 | 0.80 | |
|  Pleasants, Allan J | | | 2139 | WLS | 1.00 | 1 | 0.77 | 20 | 15.40 | | | Young, Alan | | | 2023 | WLS | 0.00 | 1 | -0.37 | 20 | -7.40 | |  Ralphs, Nigel | | | 2018 | WLS | 0.50 | 1 | 0.13 | 20 | 2.60 | | | Stuart, Neil | | | 1740 | WLS | 1.00 | 1 | 0.26 | 20 | 5.20 | | | Sivarajasingam, Venetia | | wc | 1731 | WLS | 0.00 | 1 | -0.75 | 20 | -15.00 | |
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) | | | | 2017/18 4NCL Division 3 South Rounds 3-4 | Reading | ENG | 2018-01-13 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2176 | 1925 | 0.00 | 1 | -0.19 | 20 | -3.80 | |
| | Hall, John | f | | 2176 | ENG | 0.00 | 1 | -0.19 | 20 | -3.80 | |
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) | | | | Welsh Chess Premier League 2017/18 Round 3 | Neath | WLS | 2018-01-21 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2203 | 1925 | 0.00 | 1 | -0.17 | 20 | -3.40 | |
| | Jones, Iolo C | f | | 2203 | WLS | 0.00 | 1 | -0.17 | 20 | -3.40 | |
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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