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Individual Calculations September 2009 |
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| Perez Billinghurst, Ricardo Total change: 22.75 | |   |
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| 15th Annual Northeast Open | Stamford, Connecticut | USA | 2009-08-07 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2072 | 2109 | 1.00 | 2 | -0.08 | 25 | -2.00 | |
|  Sells, Philip G | | | 1837 | USA | 1.00 | 1 | 0.17 | 25 | 4.25 | | | Ravichandran, Siddarth | | | 2306 | IND | 0.00 | 1 | -0.25 | 25 | -6.25 | |
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 Continental Open | Sturbridge, Massachusetts | USA | 2009-08-13 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2235 | 2109 | 3.00 | 6 | 0.99 | 25 | 24.75 | |
| | Riordan, Charles R | f | | 2291 | USA | 0.00 | 1 | -0.26 | 25 | -6.50 | |  Harris, David | | | 2077 | USA | 1.00 | 1 | 0.46 | 25 | 11.50 | | | Cherniack, Alex | | | 2230 | USA | 1.00 | 1 | 0.66 | 25 | 16.50 | | | Zlotnikov, Mikhail | m | | 2308 | USA | 1.00 | 1 | 0.76 | 25 | 19.00 | | | Ravichandran, Siddarth | | | 2306 | IND | 0.00 | 1 | -0.25 | 25 | -6.25 | | | Theil, Carey M | | | 2199 | USA | 0.00 | 1 | -0.38 | 25 | -9.50 | |
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) | | |
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