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Individual Calculations September 2009 |
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| Williams, Christopher Total change: -7.50 | |   |
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| 37th Annual World Open - Open Section | Philadelphia, Pennsylvania | USA | 2009-06-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2366 | 2244 | 1.00 | 3 | -0.01 | 15 | -0.15 | |
|  Garcia, Gildardo J | g | | 2401 | COL | 0.00 | 1 | -0.29 | 15 | -4.35 | |  Tayar, Jonathan | f | | 2334 | CAN | 1.00 | 1 | 0.62 | 15 | 9.30 | | | Panjwani, Raja | f | | 2364 | CAN | 0.00 | 1 | -0.34 | 15 | -5.10 | |
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) | | | | 37th Annual World Open - Under 2400 Section | Philadelphia, Pennsylvania | USA | 2009-06-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2150 | 2244 | 1.00 | 4 | -1.48 | 15 | -22.20 | |
| | Markzon, Gregory | f | | 2203 | USA | 0.00 | 1 | -0.56 | 15 | -8.40 | | | Onyekwere, Chikwere G | | | 2232 | NGR | 1.00 | 1 | 0.48 | 15 | 7.20 | | | Kahn, Aaron E | | | 2192 | USA | 0.00 | 1 | -0.57 | 15 | -8.55 | | | Shetty, Atulya A | | | 1972 | USA | 0.00 | 1 | -0.83 | 15 | -12.45 | |
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 |
| 2297 | 2230 | 3.50 | 6 | 0.99 | 15 | 14.85 | |
| | Shmelov, Denys K | | | 2360 | UKR | 1.00 | 1 | 0.68 | 15 | 10.20 | | | Riordan, Charles R | f | | 2291 | USA | 0.50 | 1 | 0.08 | 15 | 1.20 | | | Ivanov, Alexander | g | | 2527 | USA | 0.00 | 1 | -0.15 | 15 | -2.25 | | | Pismennyy, Avraam | | | 2262 | RUS | 0.00 | 1 | -0.46 | 15 | -6.90 | | | Cherniack, Alex | | | 2230 | USA | 1.00 | 1 | 0.50 | 15 | 7.50 | | | Guo, Gill Y | | | 2111 | USA | 1.00 | 1 | 0.34 | 15 | 5.10 | |
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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