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Individual Calculations April 2009 |
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| Adelberg, David Total change: 27.25 | |   |
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| 18th Annual North American Open | Las vegas, Nevada | USA | 2008-12-26 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2125 | 2131 | 2.00 | 6 | -1.01 | 25 | -25.25 | |
|  Aigner, Michael | | | 2229 | USA | 0.50 | 1 | 0.13 | 25 | 3.25 | |  Rubsamen, Cornelius | | | 2225 | USA | 0.50 | 1 | 0.13 | 25 | 3.25 | | | Lamby, Philipp | | | 2271 | GER | 0.00 | 1 | -0.31 | 25 | -7.75 | | | Le, Cau D | | | 2081 | USA | 0.00 | 1 | -0.57 | 25 | -14.25 | | | Gallegos, Paul A | | | 2097 | USA | 0.00 | 1 | -0.55 | 25 | -13.75 | | | Huang, Richard | | | 1847 | CAN | 1.00 | 1 | 0.16 | 25 | 4.00 | |
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 Stillwater Winter FIDE Open | Stillwater, Oklahoma | USA | 2009-02-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2135 | 2131 | 2.50 | 3 | 1.01 | 25 | 25.25 | |
| | Zelnick, David E | | | 2013 | USA | 1.00 | 1 | 0.34 | 25 | 8.50 | | | Movsisyan, Movses | f | | 2229 | USA | 0.50 | 1 | 0.13 | 25 | 3.25 | | | Orton, Bill | | | 2162 | USA | 1.00 | 1 | 0.54 | 25 | 13.50 | |
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) | | | | Western Chess Congress | Concord, California | USA | 2009-03-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2285 | 2131 | 2.00 | 3 | 1.09 | 25 | 27.25 | |
| | Mezentsev, Vladimir | m | | 2403 | RUS | 1.00 | 1 | 0.83 | 25 | 20.75 | | | Cardona, Liulia | | wf | 2227 | CUB | 0.50 | 1 | 0.13 | 25 | 3.25 | | | Yanayt, Eugene | f | | 2225 | USA | 0.50 | 1 | 0.13 | 25 | 3.25 | |
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) | | |
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