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Individual Calculations April 2009 |
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| Aigner, Michael Total change: 16.65 | |   |
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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 |
| 2257 | 2229 | 3.00 | 5 | 0.66 | 15 | 9.90 | |
|  Nita Iii, Marian M | | | 2091 | USA | 1.00 | 1 | 0.31 | 15 | 4.65 | |  Sarkar, Justin | m | | 2451 | USA | 0.00 | 1 | -0.22 | 15 | -3.30 | | | Bernardino Jr, Almario | | | 2169 | PHI | 1.00 | 1 | 0.42 | 15 | 6.30 | | | Ginsburg, Mark | m | | 2373 | USA | 0.00 | 1 | -0.31 | 15 | -4.65 | | | Haessel, Dale R | f | | 2199 | CAN | 1.00 | 1 | 0.46 | 15 | 6.90 | |
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) | | | | Western Chess Congress | Concord, California | USA | 2009-03-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2298 | 2226 | 2.50 | 5 | 0.45 | 15 | 6.75 | |
| | Shankland, Samuel | m | | 2453 | USA | 0.50 | 1 | 0.29 | 15 | 4.35 | | | Zilberstein, Dmitry | m | | 2393 | USA | 0.00 | 1 | -0.28 | 15 | -4.20 | | | Ding, Richard | | | 2124 | USA | 1.00 | 1 | 0.36 | 15 | 5.40 | | | Donaldson, John | m | | 2411 | USA | 0.50 | 1 | 0.24 | 15 | 3.60 | | | Huang, Gary M | | | 2109 | USA | 0.50 | 1 | -0.16 | 15 | -2.40 | |
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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