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Individual Calculations April 2009 |
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| Gutman, Joshua Total change: 4.95 | |   |
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| 16th Annual Western Class Championshipw | Agoura Hills, California | USA | 2009-01-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2159 | 2133 | 3.50 | 6 | 0.69 | 15 | 10.35 | |
|  Lee, Andy C | | | 2240 | USA | 0.00 | 1 | -0.35 | 15 | -5.25 | |  Velikanov, Alexander | | | 2043 | USA | 1.00 | 1 | 0.38 | 15 | 5.70 | | | Pruess, David | m | | 2422 | USA | 0.00 | 1 | -0.16 | 15 | -2.40 | | | Akopian, Robert | | | 2114 | USA | 1.00 | 1 | 0.47 | 15 | 7.05 | | | Yanayt, Eugene | f | | 2225 | USA | 0.50 | 1 | 0.13 | 15 | 1.95 | | | Krishnan, Varun | | | 1908 | USA | 1.00 | 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) | | | | 26th Annual U.S Amateur Team West | Woodland Hills, CA | USA | 2009-02-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2249 | 2133 | 0.50 | 3 | -0.59 | 15 | -8.85 | |
| | Matikozyan, Andranik | m | | 2452 | ARM | 0.00 | 1 | -0.13 | 15 | -1.95 | | | Alonso, Francisco | | | 2052 | USA | 0.50 | 1 | -0.11 | 15 | -1.65 | | | Steinfl, Alessandro | | | 2242 | ITA | 0.00 | 1 | -0.35 | 15 | -5.25 | |
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) | | | | Western Chess Congress | Concord, California | USA | 2009-03-06 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2315 | 2133 | 1.00 | 3 | 0.21 | 15 | 3.15 | |
| | Ginsburg, Mark | m | | 2373 | USA | 0.00 | 1 | -0.20 | 15 | -3.00 | | | Lee, Andy C | | | 2240 | USA | 1.00 | 1 | 0.65 | 15 | 9.75 | | | Tate, Emory A | m | | 2333 | USA | 0.00 | 1 | -0.24 | 15 | -3.60 | |
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) | | | | 7th Annual Western Pacific Open | Los Angeles, CA | USA | 2009-03-13 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2336 | 2133 | 0.50 | 2 | 0.02 | 15 | 0.30 | |
| | Casella, Michael | f | | 2289 | USA | 0.50 | 1 | 0.21 | 15 | 3.15 | | | Peters, Jack | m | | 2383 | USA | 0.00 | 1 | -0.19 | 15 | -2.85 | |
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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