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Individual Calculations April 2009 |
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| Duvall, Ian Total change: 10.25 | |   |
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| 4NCL part 2 | Various | ENG | 2008-10-04 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2021 | 2067 | 1.00 | 2 | -0.13 | 25 | -3.25 | |
|  Jackson, James P | | | 2046 | ENG | 0.00 | 1 | -0.53 | 25 | -13.25 | |  Campbell, Mark C | | | 1995 | ENG | 1.00 | 1 | 0.40 | 25 | 10.00 | |
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) | | | | London Christmas Open | Harrow | ENG | 2008-12-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2076 | 2067 | 2.50 | 4 | 0.54 | 25 | 13.50 | |
| | Basham, Edward P | | | 1886 | ENG | 1.00 | 1 | 0.26 | 25 | 6.50 | | | Walker, Martin G | f | | 2220 | ENG | 0.50 | 1 | 0.20 | 25 | 5.00 | | | Chakanyuka, Charles | | | 2105 | ZIM | 0.50 | 1 | 0.05 | 25 | 1.25 | | | McIntyre, Paul | | | 2092 | SCO | 0.50 | 1 | 0.03 | 25 | 0.75 | |
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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