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Individual Calculations May 2011 |
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| Fathallah, Joe Total change: 33.75 | |   |
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| Welsh Chess Premier League | Various | WLS | 2010-11-13 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1986 | 1906 | 2.00 | 2 | 1.22 | 15 | 18.30 | |
|  Garcia, Jason | | | 2010 | WLS | 1.00 | 1 | 0.64 | 15 | 9.60 | |  Perrett, David C | | | 1961 | WLS | 1.00 | 1 | 0.58 | 15 | 8.70 | |
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) | | | | The 57th Welsh Chess Championships | Cardiff | WLS | 2011-04-22 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2021 | 1906 | 3.50 | 7 | 1.03 | 15 | 15.45 | |
| | Jameson, David | | | 2088 | WLS | 1.00 | 1 | 0.74 | 15 | 11.10 | | | Kett, Tim | | | 2202 | WLS | 0.00 | 1 | -0.15 | 15 | -2.25 | | | Garcia, Jason | | | 2010 | WLS | 0.50 | 1 | 0.14 | 15 | 2.10 | | | Lexton, Michael J | | | 2052 | WLS | 0.00 | 1 | -0.30 | 15 | -4.50 | | | Young, Alan | | | 2024 | WLS | 0.50 | 1 | 0.16 | 15 | 2.40 | | | Bullen, Alex | | | 1764 | WLS | 1.00 | 1 | 0.31 | 15 | 4.65 | | | Smith, Olivia | | wf | 2004 | WLS | 0.50 | 1 | 0.13 | 15 | 1.95 | |
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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