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Individual Calculations April 2009 |
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| De Guzman, Ricardo Total change: -12.40 | |   |
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| 18th Annual North American Open | Las vegas, Nevada | USA | 2008-12-26 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2143 | 2409 | 0.50 | 2 | -1.13 | 10 | -11.30 | |
|  Velikanov, Alexander | | | 2067 | USA | 0.50 | 1 | -0.38 | 10 | -3.80 | | | Base, Alfredo B | | | 2218 | USA | 0.00 | 1 | -0.75 | 10 | -7.50 | |
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) | | | | Western Chess Congress | Concord, California | USA | 2009-03-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2376 | 2402 | 1.50 | 3 | -0.11 | 10 | -1.10 | |
|  Ginsburg, Mark | m | | 2373 | USA | 0.50 | 1 | -0.04 | 10 | -0.40 | | | Zilberstein, Dmitry | m | | 2393 | USA | 0.50 | 1 | -0.01 | 10 | -0.10 | | | Naroditsky, Daniel | f | | 2362 | USA | 0.50 | 1 | -0.06 | 10 | -0.60 | |
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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