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Individual Calculations November 2009 |
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| Ostrovskiy, Aleksandr Total change: 31.95 | |   |
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| Marshall CC Tuesday FIDE Futurity | New York, NY | USA | 2009-07-07 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2060 | 2089 | 6.50 | 10 | 1.08 | 15 | 16.20 | |
|  Farber, Nelson M | | | 2000 | USA | 1.00 | 1 | 0.38 | 15 | 5.70 | | | Treger, Yefim | | | 2194 | USA | 0.00 | 1 | -0.36 | 15 | -5.40 | |  Berg, George P | | | 2049 | USA | 0.50 | 1 | -0.06 | 15 | -0.90 | | | Frumkin, Edward A | | | 2032 | USA | 0.50 | 1 | -0.08 | 15 | -1.20 | | | Rabin, Evan Z | | | 2026 | USA | 1.00 | 1 | 0.41 | 15 | 6.15 | | | Frumkin, Edward A | | | 2032 | USA | 1.00 | 1 | 0.42 | 15 | 6.30 | | | Rabin, Evan Z | | | 2026 | USA | 0.50 | 1 | -0.09 | 15 | -1.35 | | | Farber, Nelson M | | | 2000 | USA | 1.00 | 1 | 0.38 | 15 | 5.70 | | | Treger, Yefim | | | 2194 | USA | 0.50 | 1 | 0.14 | 15 | 2.10 | | | Berg, George P | | | 2049 | USA | 0.50 | 1 | -0.06 | 15 | -0.90 | |
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 Atlantic Open | Washington DC | USA | 2009-08-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2246 | 2089 | 1.50 | 3 | 0.61 | 15 | 9.15 | |
| | Uesugi, Shinsaku | f | | 2314 | JPN | 0.00 | 1 | -0.22 | 15 | -3.30 | | | Wang, Kevin | | | 2245 | USA | 0.50 | 1 | 0.21 | 15 | 3.15 | | | Larkins, Larry R | | | 2179 | USA | 1.00 | 1 | 0.62 | 15 | 9.30 | |
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) | | | | 131st Annual NY State Championship | Albany, New York | USA | 2009-09-04 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2156 | 2115 | 2.00 | 4 | 0.17 | 15 | 2.55 | |
| | Chiang, Michael | | | 1943 | USA | 1.00 | 1 | 0.27 | 15 | 4.05 | | | Esserman, Marc | | | 2409 | USA | 0.00 | 1 | -0.15 | 15 | -2.25 | | | Rabin, Evan Z | | | 2029 | USA | 0.50 | 1 | -0.12 | 15 | -1.80 | | | Getz, Alec | f | | 2244 | USA | 0.50 | 1 | 0.17 | 15 | 2.55 | |
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) | | | | New York October Open | New York, New York | USA | 2009-10-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2261 | 2115 | 1.00 | 2 | 0.27 | 15 | 4.05 | |
| | Lenderman, Alex | m | | 2515 * | USA | 0.00 | 1 | -0.08 | 15 | -1.20 | | | Kennedy, Shernaz | | wm | 2006 | USA | 1.00 | 1 | 0.35 | 15 | 5.25 | | | * Rating difference of more than 400. Please read more at FIDE Handbook |
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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