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Individual Calculations January 2011 |
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| Helfst, Matt Total change: 10.35 | |   |
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| 9th Annual Turkey Bowl | Fort Lauderdale, Florida | USA | 2010-11-12 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2104 | 1919 | 2.00 | 4 | 0.94 | 15 | 14.10 | |
|  Perez, Robert M | | | 2218 | USA | 0.00 | 1 | -0.15 | 15 | -2.25 | | | Zaloznyy, Mike | | | 2019 | USA | 1.00 | 1 | 0.64 | 15 | 9.60 | |  Wyde, David | | | 2083 | USA | 1.00 | 1 | 0.72 | 15 | 10.80 | | | Ng, Gary | | | 2097 | CAN | 0.00 | 1 | -0.27 | 15 | -4.05 | |
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) | | | | 46th Annual American Open | Los Angeles, California | USA | 2010-11-25 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2144 | 1919 | 1.00 | 6 | -0.45 | 15 | -6.75 | |
| | Kelley, Dereque D | | | 2167 | USA | 0.00 | 1 | -0.19 | 15 | -2.85 | | | Khachiyan, Melikset | g | | 2319 * | USA | 0.00 | 1 | -0.08 | 15 | -1.20 | | | Carreto, Giovanni | c | | 2214 | MEX | 0.00 | 1 | -0.15 | 15 | -2.25 | | | Tanaka, Christian | | | 2141 | USA | 0.00 | 1 | -0.22 | 15 | -3.30 | | | Hermansen, Ron | | | 2217 | USA | 0.00 | 1 | -0.15 | 15 | -2.25 | | | Lazarus, Barry J | | | 1803 | USA | 1.00 | 1 | 0.34 | 15 | 5.10 | | | * 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) | | | | Atlantic City International | Atlantic City, New Jersey | USA | 2010-12-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2034 | 1919 | 2.00 | 5 | 0.20 | 15 | 3.00 | |
| | Zenyuk, Iryna | c | wm | 2244 | USA | 0.00 | 1 | -0.13 | 15 | -1.95 | | | Mandelkern, Jeremy | | | 2074 | USA | 0.00 | 1 | -0.29 | 15 | -4.35 | | | Campi, William | | | 1838 | THA | 0.50 | 1 | -0.11 | 15 | -1.65 | | | Yagiz, Bora | | | 1925 | USA | 1.00 | 1 | 0.51 | 15 | 7.65 | | | Itkis, Hana | | wf | 2087 | 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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