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Individual Calculations July 2009 |
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| Robinson, Darrian Total change: 19.75 | |   |
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| New York March Open | New York, New York | USA | 2009-03-21 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2146 | 1914 | 0.50 | 2 | 0.07 | 25 | 1.75 | |
|  Thaler, Michael | | | 2217 | USA | 0.00 | 1 | -0.14 | 25 | -3.50 | |  Sobo, Henry C | | | 2074 | USA | 0.50 | 1 | 0.21 | 25 | 5.25 | |
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) | | | | 2009 New York May Open | New York, New York | USA | 2009-05-23 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2248 | 1939 | 1.00 | 2 | 0.72 | 25 | 18.00 | |
| | Zenyuk, Iryna | c | wm | 2289 | USA | 0.00 | 1 | -0.11 | 25 | -2.75 | | | Margulis, Yevgeni | | | 2207 | USA | 1.00 | 1 | 0.83 | 25 | 20.75 | |
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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