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Individual Calculations May 2011 |
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| Zeidler, Sven P. Total change: 6.15 | |   |
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| Welsh Chess Premier League | Various | WLS | 2010-11-13 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2186 | 2247 | 2.00 | 5 | -0.88 | 15 | -13.20 | |
|  Sully, David | | | 2106 | WLS | 1.00 | 1 | 0.31 | 15 | 4.65 | | | Williams, A. Howard | f | | 2347 | WLS | 0.00 | 1 | -0.36 | 15 | -5.40 | |  Young, Alan | | | 2024 | WLS | 0.00 | 1 | -0.78 | 15 | -11.70 | | | Rees, Ioan | f | | 2319 | WLS | 0.00 | 1 | -0.40 | 15 | -6.00 | | | Spice, Alan | | | 2136 | WLS | 1.00 | 1 | 0.35 | 15 | 5.25 | |
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 |
| 2158 | 2247 | 5.50 | 7 | 1.29 | 15 | 19.35 | |
| | Heap, Gerry | | | 1954 | WLS | 1.00 | 1 | 0.15 | 15 | 2.25 | | | Kelly, Paul J | | | 1924 | WLS | 1.00 | 1 | 0.13 | 15 | 1.95 | | | Kett, Tim | | | 2202 | WLS | 1.00 | 1 | 0.44 | 15 | 6.60 | | | Jones, Richard S. | f | | 2369 | WLS | 0.50 | 1 | 0.17 | 15 | 2.55 | | | Sands, David A | | | 2238 | ENG | 1.00 | 1 | 0.49 | 15 | 7.35 | | | Williams, A. Howard | f | | 2347 | WLS | 0.00 | 1 | -0.36 | 15 | -5.40 | | | Brown, Thomas | | | 2070 | WLS | 1.00 | 1 | 0.27 | 15 | 4.05 | |
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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