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Individual Calculations April 2009 |
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| Zimmer, Ralph P Total change: -22.95 | |   |
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| 35th Annual Eastern Open | Washington DC | USA | 2008-12-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2148 | 2284 | 2.50 | 6 | -1.58 | 15 | -23.70 | |
|  Beckman, Thomas J | | | 2060 | USA | 1.00 | 1 | 0.22 | 15 | 3.30 | |  Reichstein, Boris | f | | 2180 | USA | 0.50 | 1 | -0.14 | 15 | -2.10 | | | Ishmukhamedov, Akhmet | | | 2136 | KAZ | 0.00 | 1 | -0.70 | 15 | -10.50 | | | Malkiel, Daniel E | | | 2245 | USA | 0.50 | 1 | -0.05 | 15 | -0.75 | | | Samuelson, Andrew | | | 2154 | USA | 0.00 | 1 | -0.68 | 15 | -10.20 | | | Ostrovskiy, Aleksander | c | | 2112 | USA | 0.50 | 1 | -0.23 | 15 | -3.45 | |
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 |
| 2195 | 2284 | 2.50 | 4 | 0.05 | 15 | 0.75 | |
| | Lowinger, Daniel L | | | 2061 | USA | 1.00 | 1 | 0.22 | 15 | 3.30 | | | Jacobs, Jon | f | | 2299 | USA | 0.50 | 1 | 0.02 | 15 | 0.30 | | | Korley, Kassa | | | 2126 | USA | 0.50 | 1 | -0.21 | 15 | -3.15 | | | Leverett, Bruce W | | | 2295 | USA | 0.50 | 1 | 0.02 | 15 | 0.30 | |
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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