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Individual Calculations May 2011 |
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| Ostrovskiy, Aleksandr Total change: -28.05 | |   |
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| 2011 World Amateur Team & US Team East | Parsippany, New Jersery | USA | 2011-02-19 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2081 | 2294 | 3.50 | 6 | -1.10 | 15 | -16.50 | |
|  Belke, Thomas J | | | 1995 | USA | 1.00 | 1 | 0.15 | 15 | 2.25 | |  Gershenov, Ben | | | 2047 | USA | 0.50 | 1 | -0.31 | 15 | -4.65 | | | Goldberg, Benjamin | | | 2053 | USA | 0.50 | 1 | -0.30 | 15 | -4.50 | | | Finn, Sean N | | | 2171 | USA | 0.00 | 1 | -0.67 | 15 | -10.05 | | | Macaspac, Arthur M | | | 2053 | USA | 0.50 | 1 | -0.30 | 15 | -4.50 | | | Samuelson, Andrew | | | 2165 | USA | 1.00 | 1 | 0.33 | 15 | 4.95 | |
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) | | | | 2011 New York March Open | New York, New York | USA | 2011-03-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2195 | 2295 | 1.50 | 2 | 0.24 | 15 | 3.60 | |
| | Black Jr, James A | | | 2094 | USA | 1.00 | 1 | 0.24 | 15 | 3.60 | | | Bonin, Jay | m | | 2296 | USA | 0.50 | 1 | 0.00 | 15 | 0.00 | |
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) | | | | 2nd Annual Philadelphia Open | Philadelphia, Pennsylvania | USA | 2011-04-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2166 | 2295 | 5.00 | 9 | -1.01 | 15 | -15.15 | |
| | Perelshteyn, Eugene | g | | 2533 | USA | 0.00 | 1 | -0.20 | 15 | -3.00 | | | Harmon-Vellotti, Luke | | | 2128 | USA | 0.50 | 1 | -0.22 | 15 | -3.30 | | | Friedman, Josef I | f | | 2178 | USA | 0.50 | 1 | -0.16 | 15 | -2.40 | | | Vulis, Daniel | | | 2080 | USA | 0.50 | 1 | -0.27 | 15 | -4.05 | | | Marcolino, Daniel M | | | 2074 | BRA | 1.00 | 1 | 0.22 | 15 | 3.30 | | | Kis, Lorand Bela | | | 2088 | USA | 1.00 | 1 | 0.23 | 15 | 3.45 | | | Bierkens, Pieter A | | | 2137 | USA | 0.00 | 1 | -0.71 | 15 | -10.65 | | | Fan, Yun | | wf | 2064 | USA | 1.00 | 1 | 0.21 | 15 | 3.15 | | | Belliard, Luis | | | 2212 | DOM | 0.50 | 1 | -0.11 | 15 | -1.65 | |
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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