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Individual Calculations January 2010 |
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| Ostrovskiy, Aleksandr Total change: 10.95 | |   |
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| 2nd Annual "What-A-Turkey" Open | New York, New York | USA | 2009-11-21 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2275 | 2147 | 1.50 | 3 | 0.41 | 15 | 6.15 | |
|  Winter, Curtis A | | | 1905 | USA | 1.00 | 1 | 0.20 | 15 | 3.00 | | | Sarkar, Justin | m | | 2374 | USA | 0.50 | 1 | 0.29 | 15 | 4.35 | |  Kudrin, Sergey | g | | 2547 * | USA | 0.00 | 1 | -0.08 | 15 | -1.20 | | | * Rating difference of more than 400. Please read more at FIDE Handbook |
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) | | | | 40th Annual National Chess Congress | Philadelphia, Pennsylvania | USA | 2009-11-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2408 | 2147 | 0.50 | 1 | 0.32 | 15 | 4.80 | |
| | Esserman, Marc R | m | | 2408 | USA | 0.50 | 1 | 0.32 | 15 | 4.80 | |
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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