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Individual Calculations July 2009 |
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| Amarasinghe, Prashantha Total change: 15.95 | |   |
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| 47th Cincinnati Open | Cincinnati, Ohio | USA | 2009-03-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2145 | 1949 | 1.00 | 4 | -0.02 | 25 | -0.50 | |
|  Patchell, Erik | | | 2142 | USA | 0.00 | 1 | -0.25 | 25 | -6.25 | | | Brookshear, Timothy | | | 2046 | USA | 0.50 | 1 | 0.13 | 25 | 3.25 | |  Ramer, Scott | | | 2133 | USA | 0.50 | 1 | 0.24 | 25 | 6.00 | | | Whaley, Davis | | | 2257 | USA | 0.00 | 1 | -0.14 | 25 | -3.50 | |
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) | | | | 11th Annual Foxwoods Open | Mashantucket, Connecticut | USA | 2009-04-08 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2160 | 1930 | 1.50 | 7 | -0.05 | 25 | -1.25 | |
| | Melekhina, Alisa | | wm | 2280 | USA | 0.00 | 1 | -0.11 | 25 | -2.75 | | | Vertkin, Sergey | | | 2219 | RUS | 0.00 | 1 | -0.16 | 25 | -4.00 | | | Santalla, Andres | | | 2107 | USA | 1.00 | 1 | 0.73 | 25 | 18.25 | | | Kudryavtsev, Vadim | | | 2165 | RUS | 0.00 | 1 | -0.21 | 25 | -5.25 | | | Cardona, Liulia | | wf | 2226 | CUB | 0.00 | 1 | -0.15 | 25 | -3.75 | | | Pozarek, Stephen J | | | 2139 | USA | 0.50 | 1 | 0.27 | 25 | 6.75 | | | Gershenov, Ben | | | 1987 | USA | 0.00 | 1 | -0.42 | 25 | -10.50 | |
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) | | | NOTE: K factor changed | | 18th Annual Chicago Open - U2300 Section | Wheeling, Illinois | USA | 2009-05-22 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2165 | 1930 | 2.50 | 6 | 1.18 | 15 | 17.70 | |
| | Lowinger, Daniel L | | | 2064 | USA | 0.50 | 1 | 0.18 | 15 | 2.70 | | | Rios, Adrian | | | 2244 | MEX | 0.50 | 1 | 0.36 | 15 | 5.40 | | | Whaley, Davis M | | | 2257 | USA | 0.50 | 1 | 0.37 | 15 | 5.55 | | | Aigner, Michael | | | 2243 | USA | 0.00 | 1 | -0.14 | 15 | -2.10 | | | Times, Lawyer | | | 2018 | USA | 1.00 | 1 | 0.62 | 15 | 9.30 | | | Kudryavtsev, Vadim | | | 2165 | RUS | 0.00 | 1 | -0.21 | 15 | -3.15 | |
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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