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Individual Calculations April 2009 |
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| Naroditsky, Alan Total change: -13.25 | |   |
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| Winter Tuesday Night Marathon | San Francisco, California | USA | 2009-01-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2131 | 2133 | 0.50 | 1 | 0.00 | 25 | 0.00 | |
|  Sandberg, Evan | | | 2131 | USA | 0.50 | 1 | 0.00 | 25 | 0.00 | |
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) | | | | 26th Annual U.S Amateur Team West | Woodland Hills, CA | USA | 2009-02-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1988 | 2133 | 1.50 | 3 | -0.53 | 25 | -13.25 | |
| | Feldstein, Robert | | | 1832 | USA | 1.00 | 1 | 0.15 | 25 | 3.75 | |  Huang, Vincent | | | 2016 | USA | 0.00 | 1 | -0.66 | 25 | -16.50 | | | Williams, John R | | | 2116 | USA | 0.50 | 1 | -0.02 | 25 | -0.50 | |
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) | | |
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