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Individual Calculations April 2009 |
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| Privman, Boris Total change: -0.45 | |   |
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| 35th Annual Eastern Open | Washington DC | USA | 2008-12-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2096 | 2185 | 2.50 | 4 | 0.03 | 15 | 0.45 | |
|  Trower, Todd | | | 2012 | USA | 0.00 | 1 | -0.73 | 15 | -10.95 | | | Malkiel, Daniel E | | | 2245 | USA | 0.50 | 1 | 0.08 | 15 | 1.20 | |  Dai, Yang | | | 1991 | USA | 1.00 | 1 | 0.25 | 15 | 3.75 | | | Ishmukhamedov, Akhmet | | | 2136 | KAZ | 1.00 | 1 | 0.43 | 15 | 6.45 | |
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) | | | | Happy New Year Open | New York, New York | USA | 2009-01-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2298 | 2172 | 0.50 | 2 | -0.25 | 15 | -3.75 | |
| | Yudasin, Leonid G | g | | 2522 | ISR | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Sturt, Raven M | | | 2073 | USA | 0.50 | 1 | -0.14 | 15 | -2.10 | |
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) | | | | 41st Annual Liberty Bell Open | Philadelphia, Pennsylvania | USA | 2009-01-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2186 | 2172 | 2.50 | 5 | 0.02 | 15 | 0.30 | |
| | Odeh, Kenneth | | | 1991 | NGR | 1.00 | 1 | 0.26 | 15 | 3.90 | | | Uesugi, Shinsaku | | | 2243 | JPN | 1.00 | 1 | 0.60 | 15 | 9.00 | | | Shabalov, Alexander | g | | 2522 | USA | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Vulis, Daniel | | | 2035 | USA | 0.50 | 1 | -0.18 | 15 | -2.70 | | | Samimi, Sohrab | | | 2139 | USA | 0.00 | 1 | -0.55 | 15 | -8.25 | |
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) | | | | 39th Annual World Amateur Team & US Team East | Parsippany, New Jersey | USA | 2009-02-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2214 | 2172 | 1.50 | 3 | 0.17 | 15 | 2.55 | |
| | Fitzko, Mitchell | | | 2127 | USA | 0.50 | 1 | -0.06 | 15 | -0.90 | | | Mirabile, Tim | | | 2180 | USA | 0.50 | 1 | 0.01 | 15 | 0.15 | | | Yeager, Daniel A | f | | 2336 | USA | 0.50 | 1 | 0.22 | 15 | 3.30 | |
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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