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Individual Calculations November 2009 |
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| Harmon-Vellotti, Luke Total change: -19.35 | |   |
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| 2009 CalChess Labor Day Championships | San Francisco, California | USA | 2009-09-05 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2072 | 2048 | 0.50 | 4 | -1.38 | 15 | -20.70 | |
|  Aigner, Michael | | | 2224 | USA | 0.00 | 1 | -0.27 | 15 | -4.05 | | | Cohen, Micah | | | 1906 | USA | 0.00 | 1 | -0.69 | 15 | -10.35 | |  Gallegos, Paul A | | | 2085 | USA | 0.00 | 1 | -0.45 | 15 | -6.75 | | | Shin, Kyle | | | 2071 | USA | 0.50 | 1 | 0.03 | 15 | 0.45 | |
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) | | | | 2009 Los Angeles Open | Los Angeles, California | USA | 2009-10-09 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2057 | 2048 | 2.50 | 5 | 0.09 | 15 | 1.35 | |
| | Peters, Jack | m | | 2386 | USA | 0.00 | 1 | -0.12 | 15 | -1.80 | | | Caen, Eric | | | 1872 | FRA | 1.00 | 1 | 0.27 | 15 | 4.05 | | | Kurosaki, Takashi | | | 2132 | USA | 0.00 | 1 | -0.38 | 15 | -5.70 | | | Liao, Simone | | wf | 1678 | USA | 1.00 | 1 | 0.10 | 15 | 1.50 | | | Hermansen, Ron | | | 2215 | USA | 0.50 | 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) | | |
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