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Individual Calculations April 2009 |
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| Robinson, Darrian Total change: 24.50 | |   |
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| Happy New Year Open | New York, New York | USA | 2009-01-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2148 | 1914 | 2.00 | 2 | 1.59 | 25 | 39.75 | |
|  West, James R | | | 2193 | USA | 1.00 | 1 | 0.84 | 25 | 21.00 | |  Berg, George P | | | 2103 | USA | 1.00 | 1 | 0.75 | 25 | 18.75 | |
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) | | | | 39th Annual World Amateur Team & US Team East | Parsippany, New Jersey | USA | 2009-02-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2062 | 1914 | 0.00 | 2 | -0.61 | 25 | -15.25 | |
| | Weser, Adam | | | 2097 | USA | 0.00 | 1 | -0.26 | 25 | -6.50 | | | Goldberg, Benjamin | | | 2026 | USA | 0.00 | 1 | -0.35 | 25 | -8.75 | |
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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