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Individual Calculations February 2015 |
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| Buttell, David Total change: -55.40 | |   |
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| 2015 South Wales New Year Open | Bridgend | WLS | 2015-01-02 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1656 | 1848 | 1.50 | 5 | -2.07 | 20 | -41.40 | |
|  Heap, Gerry | | | 2056 | WLS | 0.00 | 1 | -0.23 | 20 | -4.60 | |  Guha, Chirag | | | 1535 | WLS | 0.00 | 1 | -0.86 | 20 | -17.20 | | | Sivarajasingam, Shayanna | | | 1553 | WLS | 0.00 | 1 | -0.85 | 20 | -17.00 | | | Sivarajasingam, Venetia | | | 1448 * | WLS | 0.50 | 1 | -0.42 | 20 | -8.40 | | | McLaren, Charlie | | | 1687 | ENG | 1.00 | 1 | 0.29 | 20 | 5.80 | | | * Rating difference of more than 400. Please read more at FIDE Handbook |
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) | | | | 4NCL 2014-15 Rounds 3-4 | Various | ENG | 2015-01-10 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2012 | 1848 | 0.50 | 2 | -0.07 | 20 | -1.40 | |
| | Myall, Ivan | | | 2038 | ENG | 0.00 | 1 | -0.25 | 20 | -5.00 | | | Williamson, Kevin | | | 1985 | ENG | 0.50 | 1 | 0.18 | 20 | 3.60 | |
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) | | | | Welsh Chess Premier League 2014/15 Rd4 | Various | WLS | 2015-01-18 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1753 | 1848 | 0.00 | 1 | -0.63 | 20 | -12.60 | |
| | Thompson, Keith | | | 1753 | WLS | 0.00 | 1 | -0.63 | 20 | -12.60 | |
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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