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Individual Calculations July 2009 |
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| Bradford, Joseph M Total change: -10.40 | |   |
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| 18th Annual Chicago Open - Open Section | Wheeling, Illinois | USA | 2009-05-22 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2284 | 2419 | 3.50 | 7 | -1.17 | 10 | -11.70 | |
|  Owen, Steven A | | | 2084 | USA | 0.00 | 1 | -0.88 | 10 | -8.80 | |  Melekhina, Alisa | | wm | 2287 | USA | 1.00 | 1 | 0.32 | 10 | 3.20 | | | Rosen, Eric S | | | 2142 | USA | 1.00 | 1 | 0.17 | 10 | 1.70 | | | Shulman, Yury | g | | 2632 | USA | 0.00 | 1 | -0.23 | 10 | -2.30 | | | Yang, Darwin | f | | 2231 | USA | 0.50 | 1 | -0.24 | 10 | -2.40 | | | Holt, Conrad | | | 2289 | USA | 1.00 | 1 | 0.32 | 10 | 3.20 | | | Kleiman, Jake | f | | 2326 | USA | 0.00 | 1 | -0.63 | 10 | -6.30 | |
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) | | | | 2009 National Open | Las Vegas, Nevada | USA | 2009-06-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2442 | 2419 | 2.00 | 4 | 0.13 | 10 | 1.30 | |
| | Adelberg, David | | | 2158 | USA | 1.00 | 1 | 0.18 | 10 | 1.80 | | | Akobian, Varuzhan | g | | 2613 | USA | 0.50 | 1 | 0.25 | 10 | 2.50 | | | Ehlvest, Jaan | g | | 2606 | USA | 0.00 | 1 | -0.26 | 10 | -2.60 | | | De Guzman, Ricardo | m | | 2390 | PHI | 0.50 | 1 | -0.04 | 10 | -0.40 | |
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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