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Individual Calculations September 2009 |
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| Ruderfer, Mark B Total change: -1.50 | |   |
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| ISR 2nd League South 2009 | Various | ISR | 2009-01-08 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2297 | 2316 | 2.00 | 4 | -0.10 | 15 | -1.50 | |
|  Kataev, Simcho | | | 2309 | RUS | 0.50 | 1 | -0.01 | 15 | -0.15 | | | Gofman, Alex | | | 2304 | ISR | 0.50 | 1 | -0.02 | 15 | -0.30 | |  Andreev, Dmitri | | | 2285 | ISR | 0.50 | 1 | -0.04 | 15 | -0.60 | | | Lederman, Leon | m | | 2291 | ISR | 0.50 | 1 | -0.03 | 15 | -0.45 | |
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) | | |
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