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Individual Calculations January 2011 |
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| Ostrovskiy, Aleksandr Total change: -15.30 | |   |
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| 2010 Marshall Chess Club Championship | New York, New York | USA | 2010-10-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2164 | 2243 | 1.50 | 4 | -0.91 | 15 | -13.65 | |
|  Tom, George | | | 2034 | USA | 0.50 | 1 | -0.27 | 15 | -4.05 | |  Margiotta, Jason J | | | 1988 | USA | 1.00 | 1 | 0.19 | 15 | 2.85 | | | Paragua, Mark C | g | | 2496 | PHI | 0.00 | 1 | -0.19 | 15 | -2.85 | | | Chernin, Oliver | | | 2138 | USA | 0.00 | 1 | -0.64 | 15 | -9.60 | |
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) | | | | 41st Annual National Chess Congress | Philadelphia, Pennsylvania | USA | 2010-11-26 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2277 | 2309 | 2.00 | 4 | -0.11 | 15 | -1.65 | |
| | Miller, Jake S | | | 1946 | USA | 1.00 | 1 | 0.10 | 15 | 1.50 | | | Kudrin, Sergey | g | | 2543 | USA | 0.00 | 1 | -0.21 | 15 | -3.15 | | | Tan, Mackinley E | | | 2028 | USA | 1.00 | 1 | 0.16 | 15 | 2.40 | | | Shabalov, Alexander | g | | 2591 | USA | 0.00 | 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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