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Individual Calculations July 2010 |
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| Helfst, Matt Total change: 49.30 | |   |
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| 19th Annual Chicago Open | Wheeling, Illinois | USA | 2010-05-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2194 | 1884 | 2.50 | 8 | 1.33 | 25 | 33.25 | |
|  Koo, Oliver T | | | 2241 | USA | 1.00 | 1 | 0.89 | 25 | 22.25 | |  Shabalov, Alexander | g | | 2284 * | USA | 0.00 | 1 | -0.08 | 25 | -2.00 | | | Whaley, Davis M | | | 2189 | USA | 0.50 | 1 | 0.36 | 25 | 9.00 | | | Kiewra, Keaton | f | | 2284 * | USA | 0.00 | 1 | -0.08 | 25 | -2.00 | | | Gardner, Justin L | | | 2174 | USA | 0.00 | 1 | -0.16 | 25 | -4.00 | | | Daly, Troy | | | 2137 | USA | 0.00 | 1 | -0.19 | 25 | -4.75 | | | Holliman, Bob | | | 2164 | USA | 0.50 | 1 | 0.34 | 25 | 8.50 | | | Hellwig, Luke | | | 2076 | USA | 0.50 | 1 | 0.25 | 25 | 6.25 | | | * 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) | | | NOTE: K factor changed | | 2010 North Carolina Class Championships | Charlotte, North Carolina | USA | 2010-06-04 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2108 | 1884 | 0.00 | 1 | -0.22 | 15 | -3.30 | |
| | Newsom, Gary Dale | | | 2108 | USA | 0.00 | 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) | | | NOTE: K factor changed | | 2010 National Open | Las Vegas, Nevada | USA | 2010-06-11 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2123 | 1884 | 2.50 | 6 | 1.29 | 15 | 19.35 | |
| | Kavutskiy, Konstanin | | | 2132 | USA | 0.50 | 1 | 0.31 | 15 | 4.65 | | | Simms, Gary | | | 2141 | USA | 0.00 | 1 | -0.18 | 15 | -2.70 | | | Tanaka, Christian | | | 2130 | USA | 0.00 | 1 | -0.19 | 15 | -2.85 | | | Zaczek, Jonathon | | | 2092 | CAN | 0.50 | 1 | 0.27 | 15 | 4.05 | | | Merwin, Steven E | | | 2080 | USA | 1.00 | 1 | 0.75 | 15 | 11.25 | | | Schneider, Chad A | | | 2162 | USA | 0.50 | 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) | | |
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