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Individual Calculations September 2012 |
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| Vibbert, Sean Total change: 15.15 | |   |
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| 113th Annual US Open | Vancouver, Washington | USA | 2012-08-04 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2062 | 2240 | 5.50 | 7 | 0.40 | 15 | 6.00 | |
|  Berry, Jim | | | 1997 | USA | 1.00 | 1 | 0.20 | 15 | 3.00 | |  Weatherspoon, Kyle | | | 1949 | USA | 1.00 | 1 | 0.15 | 15 | 2.25 | | | Sohal, Tanraj S | | | 2099 | CAN | 0.50 | 1 | -0.19 | 15 | -2.85 | | | Ummel, Igor | | | 2162 | USA | 0.00 | 1 | -0.61 | 15 | -9.15 | | | Serna, Jeffrey M | | | 2028 | USA | 1.00 | 1 | 0.23 | 15 | 3.45 | | | Yan, Gaibo | | | 2106 | USA | 1.00 | 1 | 0.32 | 15 | 4.80 | | | Wang, Michael | | | 2094 | USA | 1.00 | 1 | 0.30 | 15 | 4.50 | |
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) | | | | 2012 Denker Tournament of High School Champions | Vancouver, Washington | USA | 2012-08-04 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2249 | 2240 | 2.00 | 4 | 0.03 | 15 | 0.45 | |
| | Omori, Michael | | | 2188 | USA | 1.00 | 1 | 0.43 | 15 | 6.45 | | | Yang, Darwin | m | | 2486 | USA | 0.00 | 1 | -0.19 | 15 | -2.85 | | | Schmakel, Sam A | | | 2127 | USA | 0.50 | 1 | -0.15 | 15 | -2.25 | | | Mu, Joshua | | | 2195 | USA | 0.50 | 1 | -0.06 | 15 | -0.90 | |
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) | | | | 2nd Metropolitan Chess FIDE International | Los Angeles, California | USA | 2012-08-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2290 | 2240 | 4.50 | 9 | 0.58 | 15 | 8.70 | |
| | Sevillano, Enrico | m | | 2526 | USA | 0.50 | 1 | 0.34 | 15 | 5.10 | | | Shytaj, Luca | m | | 2486 | ITA | 0.00 | 1 | -0.19 | 15 | -2.85 | | | Kong, Dezheng | | | 2051 | CAN | 1.00 | 1 | 0.25 | 15 | 3.75 | | | Adamson, Robby | f | | 2324 | USA | 0.50 | 1 | 0.12 | 15 | 1.80 | | | Liou, Yian | f | | 2350 | USA | 0.00 | 1 | -0.35 | 15 | -5.25 | | | Krishnan, Varun | | | 2146 | USA | 0.50 | 1 | -0.13 | 15 | -1.95 | | | Beilin, Allan | | | 1988 | USA | 1.00 | 1 | 0.19 | 15 | 2.85 | | | Pruess, David | m | | 2375 | USA | 0.50 | 1 | 0.18 | 15 | 2.70 | | | Young, Gregory | | | 2368 | USA | 0.50 | 1 | 0.17 | 15 | 2.55 | |
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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