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Individual Calculations April 2009 |
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| Peters, Jack Total change: 6.80 | |   |
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| 26th Annual U.S Amateur Team West | Woodland Hills, CA | USA | 2009-02-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2178 | 2383 | 3.00 | 4 | 0.00 | 10 | 0.00 | |
|  Banawa, Joel | f | | 2327 | USA | 0.00 | 1 | -0.58 | 10 | -5.80 | | | Tatum, Kofi O | | | 2033 | USA | 1.00 | 1 | 0.11 | 10 | 1.10 | |  Pinto, Mark A | | | 2131 | USA | 1.00 | 1 | 0.19 | 10 | 1.90 | | | Bruno, Ronald | | | 2219 | USA | 1.00 | 1 | 0.28 | 10 | 2.80 | |
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) | | | | 7th Annual Western Pacific Open | Los Angeles, CA | USA | 2009-03-13 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2207 | 2383 | 3.50 | 4 | 0.68 | 10 | 6.80 | |
| | Faber, Craig Allen | | | 2148 | USA | 1.00 | 1 | 0.21 | 10 | 2.10 | | | Lagemann, Nathaniel | | | 2033 | USA | 1.00 | 1 | 0.11 | 10 | 1.10 | | | Gutman, Joshua | | | 2133 | USA | 1.00 | 1 | 0.19 | 10 | 1.90 | | | Sevillano, Enrico | m | | 2512 | USA | 0.50 | 1 | 0.17 | 10 | 1.70 | |
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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