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Individual Calculations March 2010 |
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| Katz, Alexander R Total change: -14.75 | |   |
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| Edward Lasker Memorial and 93rd Annual Marshall Chess Club Championship | New York, New York | USA | 2009-12-11 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2265 | 2175 | 4.00 | 8 | 0.78 | 25 | 19.50 | |
|  Krush, Irina | m | wg | 2451 | USA | 0.00 | 1 | -0.17 | 25 | -4.25 | |  Ostrovskiy, Anatoliy | | | 1963 | USA | 1.00 | 1 | 0.23 | 25 | 5.75 | | | Babaev, Rashad | g | | 2535 | AZE | 0.00 | 1 | -0.10 | 25 | -2.50 | | | Hulse, Brian | f | | 2223 | USA | 0.50 | 1 | 0.07 | 25 | 1.75 | | | Berg, George P | | | 2045 | USA | 1.00 | 1 | 0.32 | 25 | 8.00 | | | Yudasin, Leonid G | g | | 2536 | ISR | 0.00 | 1 | -0.10 | 25 | -2.50 | | | Treger, Yefim | | | 2223 | USA | 1.00 | 1 | 0.57 | 25 | 14.25 | | | Ostrovskiy, Aleksandr | c | | 2147 | USA | 0.50 | 1 | -0.04 | 25 | -1.00 | |
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) | | | | 2010 Happy New Year Open | New york, New York | USA | 2010-01-02 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1976 | 2175 | 0.50 | 1 | -0.26 | 25 | -6.50 | |
| | Margiotta, Jason J | | | 1976 | USA | 0.50 | 1 | -0.26 | 25 | -6.50 | |
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) | | | | 42nd Annual Liberty Bell Open | Philadelphia, Pennsylvania | USA | 2010-01-15 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2149 | 2175 | 0.50 | 3 | -1.11 | 25 | -27.75 | |
| | Smith, Bryan G | m | | 2468 | USA | 0.00 | 1 | -0.15 | 25 | -3.75 | | | Sells, Philip G | | | 1900 | USA | 0.00 | 1 | -0.83 | 25 | -20.75 | | | Terrie, Henry L | | | 2078 | USA | 0.50 | 1 | -0.13 | 25 | -3.25 | |
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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