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Individual Calculations May 2011 |
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| Rees, Ioan Total change: -5.55 | |   |
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| Welsh Chess Premier League | Various | WLS | 2010-11-13 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2247 | 2319 | 1.00 | 1 | 0.40 | 15 | 6.00 | |
|  Zeidler, Sven P. | f | | 2247 | WLS | 1.00 | 1 | 0.40 | 15 | 6.00 | |
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 |
| 2045 | 2319 | 2.50 | 4 | -0.77 | 15 | -11.55 | |
| | Davis, Lee | | | 1974 | WLS | 0.50 | 1 | -0.39 | 15 | -5.85 | |  Van Kemenade, Rudy | | | 1951 | WLS | 1.00 | 1 | 0.10 | 15 | 1.50 | | | Lexton, Michael J | | | 2052 | WLS | 1.00 | 1 | 0.18 | 15 | 2.70 | | | Kett, Tim | | | 2202 | WLS | 0.00 | 1 | -0.66 | 15 | -9.90 | |
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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