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Individual Calculations September 2009 |
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| Gutman, Joshua Total change: -18.60 | |   |
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| Southern California Championship Candidates | Garden Grove, California | USA | 2009-06-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2017 | 2138 | 0.00 | 2 | -1.25 | 15 | -18.75 | |
|  Yurenok, Sergey | | | 2231 | USA | 0.00 | 1 | -0.37 | 15 | -5.55 | | | Zhang, Eric R | | | 1803 | USA | 0.00 | 1 | -0.88 | 15 | -13.20 | |
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) | | | | 37th Annual World Open - Under 2400 Section | Philadelphia, Pennsylvania | USA | 2009-06-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2211 | 2138 | 3.00 | 7 | 0.18 | 15 | 2.70 | |
| | Young, Angelo | m | | 2350 | PHI | 0.00 | 1 | -0.23 | 15 | -3.45 | |  Dzera, Victor | | | 2200 | CAN | 0.00 | 1 | -0.41 | 15 | -6.15 | | | Mabe, Chris J | | | 2214 | USA | 0.50 | 1 | 0.10 | 15 | 1.50 | | | Hortillosa, Andres | | | 2143 | USA | 0.50 | 1 | 0.01 | 15 | 0.15 | | | Sundar, Avinaash | | | 2093 | CAN | 1.00 | 1 | 0.44 | 15 | 6.60 | | | Madsen, Dag | f | | 2282 | NOR | 1.00 | 1 | 0.69 | 15 | 10.35 | | | Anderson, Renard W | f | | 2192 | USA | 0.00 | 1 | -0.42 | 15 | -6.30 | |
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) | | | | 14th Annual Pacific Coast Open | Agoura Hills, California | USA | 2009-07-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2232 | 2153 | 1.00 | 3 | -0.17 | 15 | -2.55 | |
| | Landaw, Julian W | | | 2291 | USA | 0.50 | 1 | 0.19 | 15 | 2.85 | | | Hermansen, Ron | | | 2222 | USA | 0.50 | 1 | 0.10 | 15 | 1.50 | | | Tanaka, Christian T | | | 2183 | USA | 0.00 | 1 | -0.46 | 15 | -6.90 | |
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) | | |
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