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Individual Calculations September 2017 |
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| Welch, David Total change: -28.00 | |   |
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| 104th British Championships Under 1900 | Llandudno | ENG | 2017-07-31 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1725 | 1678 | 1.50 | 5 | -0.70 | 40 | -28.00 | |
|  Gartside, Carl | | | 1863 | ENG | 0.00 | 1 | -0.26 | 40 | -10.40 | |  Horrell, Stephen A | | | 1504 | WLS | 1.00 | 1 | 0.27 | 40 | 10.80 | | | Murrell, Mark Ra | | | 1791 | ENG | 0.00 | 1 | -0.35 | 40 | -14.00 | | | Andrews, Norman G | | | 1612 | ENG | 0.00 | 1 | -0.59 | 40 | -23.60 | | | Taylor, Robert P | | | 1854 | ENG | 0.50 | 1 | 0.23 | 40 | 9.20 | |
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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