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Individual Calculations February 2015 |
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| Waterfield, John W Total change: -39.40 | |   |
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| 2015 South Wales New Year Open | Bridgend | WLS | 2015-01-02 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1666 | 1962 | 3.00 | 5 | -1.21 | 20 | -24.20 | |
|  Rovaretti, David | | | 1643 | WLS | 0.50 | 1 | -0.37 | 20 | -7.40 | |  Wang, Alyssa | | | 1652 | WLS | 0.50 | 1 | -0.36 | 20 | -7.20 | | | Parry, Matthew | | | 1788 | WLS | 0.00 | 1 | -0.73 | 20 | -14.60 | | | McLaren, Charlie | | | 1687 | ENG | 1.00 | 1 | 0.17 | 20 | 3.40 | | | Guha, Chirag | | | 1562 * | WLS | 1.00 | 1 | 0.08 | 20 | 1.60 | | | * 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 |
| 1946 | 1962 | 0.50 | 2 | -0.54 | 20 | -10.80 | |
| | Davies, Matthew | | | 1926 | WLS | 0.50 | 1 | -0.05 | 20 | -1.00 | | | Toothill, Andrew | | | 1966 | ENG | 0.00 | 1 | -0.49 | 20 | -9.80 | |
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 2014/15 Rd4 | Various | WLS | 2015-01-18 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1794 | 1962 | 0.50 | 1 | -0.22 | 20 | -4.40 | |
| | Haigh, Tony | | | 1794 | WLS | 0.50 | 1 | -0.22 | 20 | -4.40 | |
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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