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Individual Calculations July 2009 |
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| Bonin, Jay Total change: 15.90 | |   |
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| New York March Open | New York, New York | USA | 2009-03-21 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2086 | 2361 | 1.00 | 2 | -0.66 | 10 | -6.60 | |
|  Sobo, Henry C | | | 2074 | USA | 1.00 | 1 | 0.16 | 10 | 1.60 | |  Gaspard, Fritz P | | | 2098 | USA | 0.00 | 1 | -0.82 | 10 | -8.20 | |
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 |
| 2290 | 2369 | 6.00 | 8 | 1.21 | 10 | 12.10 | |
| | Swaminathan, Rahul K | | | 2037 | USA | 1.00 | 1 | 0.12 | 10 | 1.20 | | | Dougherty, Michael | f | | 2203 | CAN | 1.00 | 1 | 0.28 | 10 | 2.80 | | | Perelshteyn, Eugene | g | | 2543 | USA | 0.50 | 1 | 0.23 | 10 | 2.30 | | | Yermolinsky, Alex | g | | 2522 | USA | 0.00 | 1 | -0.30 | 10 | -3.00 | | | Getz, Alec | f | | 2229 | USA | 1.00 | 1 | 0.31 | 10 | 3.10 | | | Markzon, Gregory | f | | 2203 | USA | 0.50 | 1 | -0.22 | 10 | -2.20 | | | Moon, Ryan Joseph | | | 2228 | USA | 1.00 | 1 | 0.31 | 10 | 3.10 | | | Lee, Michael | f | | 2358 | USA | 1.00 | 1 | 0.48 | 10 | 4.80 | |
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 New York May Open | New York, New York | USA | 2009-05-23 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2277 | 2369 | 3.50 | 4 | 1.04 | 10 | 10.40 | |
| | Berg, George P | | | 2085 | USA | 1.00 | 1 | 0.16 | 10 | 1.60 | | | Zenyuk, Iryna | c | wm | 2305 | USA | 0.50 | 1 | -0.09 | 10 | -0.90 | | | Hoffmann, Asa | f | | 2283 | USA | 1.00 | 1 | 0.38 | 10 | 3.80 | | | Lenderman, Alex | m | | 2434 | USA | 1.00 | 1 | 0.59 | 10 | 5.90 | |
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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