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Individual Calculations September 2017 |
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| Mason, Donald J Total change: -3.80 | |   |
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| 104th British Championships Over 50 | Llandudno | ENG | 2017-07-30 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2021 | 2129 | 3.00 | 5 | -0.19 | 20 | -3.80 | |
|  Shakespeare, John S | | | 1930 | WLS | 0.50 | 1 | -0.26 | 20 | -5.20 | |  Lowick Higgie, Charles | | | 1918 | WLS | 0.50 | 1 | -0.27 | 20 | -5.40 | | | Punnett, Alan K | | | 2043 | ENG | 0.50 | 1 | -0.12 | 20 | -2.40 | | | Kennedy, Craig | | | 1855 | SCO | 1.00 | 1 | 0.17 | 20 | 3.40 | | | Littlewood, Paul E | m | | 2361 | ENG | 0.50 | 1 | 0.29 | 20 | 5.80 | |
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) | | |
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