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Individual Calculations May 2015 |
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| Buttell, David Total change: -6.40 | |   |
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| 2015 Tom Weston Memorial Open/Major | Cardiff | WLS | 2015-04-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1919 | 1797 | 3.00 | 5 | 1.28 | 20 | 25.60 | |
|  Sivarajasingam, Venetia | | | 1455 | WLS | 1.00 | 1 | 0.12 | 20 | 2.40 | |  De Coverly, Roger D | | | 2020 | ENG | 1.00 | 1 | 0.78 | 20 | 15.60 | | | Fletcher, John | | | 2066 | WLS | 0.50 | 1 | 0.33 | 20 | 6.60 | | | Summers, Charles | | | 1912 | WLS | 0.50 | 1 | 0.16 | 20 | 3.20 | | | Gibiec, Ernest | | | 2142 | CZE | 0.00 | 1 | -0.11 | 20 | -2.20 | |
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) | | | | 2nd 4NCL Congress Open | Wakefield | ENG | 2015-04-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1877 | 1797 | 0.00 | 4 | -1.60 | 20 | -32.00 | |
| | Bak, Andrew | | | 2050 | ENG | 0.00 | 1 | -0.19 | 20 | -3.80 | | | Moreby, James | | | 1954 | ENG | 0.00 | 1 | -0.29 | 20 | -5.80 | | | Rowan, Daniel | | | 1768 | ENG | 0.00 | 1 | -0.54 | 20 | -10.80 | | | Rahman, Yousuf | | | 1737 | ITA | 0.00 | 1 | -0.58 | 20 | -11.60 | |
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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