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Individual Calculations September 2009 |
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| Karklins, Andrew Total change: 11.25 | |   |
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| 37th Annual World Open - Under 2400 Section | Philadelphia, Pennsylvania | USA | 2009-06-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2174 | 2232 | 2.50 | 5 | -0.31 | 15 | -4.65 | |
|  Sundar, Avinaash | | | 2093 | CAN | 1.00 | 1 | 0.31 | 15 | 4.65 | |  Rodriguez, Eric | | | 2247 | USA | 0.50 | 1 | 0.02 | 15 | 0.30 | | | Hua, David A | | | 1882 | USA | 1.00 | 1 | 0.11 | 15 | 1.65 | | | Young, Angelo | m | | 2350 | PHI | 0.00 | 1 | -0.34 | 15 | -5.10 | | | Zierk, Steven C | | | 2296 | USA | 0.00 | 1 | -0.41 | 15 | -6.15 | |
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 Annual Chicago Class Championships | Oak Brook, Illinois | USA | 2009-07-17 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2254 | 2205 | 3.00 | 5 | 0.81 | 15 | 12.15 | |
| | Zin, Aung Thant | f | | 2318 | MYA | 0.50 | 1 | 0.15 | 15 | 2.25 | | | Hollinberger, Drew | | | 1960 | USA | 1.00 | 1 | 0.20 | 15 | 3.00 | | | Felecan, Florin | f | | 2399 | USA | 0.50 | 1 | 0.25 | 15 | 3.75 | | | Caveney, Geoffrey | | | 2110 | USA | 1.00 | 1 | 0.37 | 15 | 5.55 | | | Gurevich, Dmitry | g | | 2485 | USA | 0.00 | 1 | -0.16 | 15 | -2.40 | |
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) | | | | 110th Annual US Open | Indianapolis, Indiana | USA | 2009-08-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2256 | 2205 | 2.00 | 4 | 0.25 | 15 | 3.75 | |
| | Obregon, Juan Luis | c | | 2172 | MEX | 1.00 | 1 | 0.45 | 15 | 6.75 | | | Bercys, Salvijus | m | | 2434 | USA | 0.00 | 1 | -0.21 | 15 | -3.15 | | | Harmon-Vellotti, Luke | | | 2017 | USA | 0.50 | 1 | -0.24 | 15 | -3.60 | | | Kaufman, Lawrence | g | | 2400 | USA | 0.50 | 1 | 0.25 | 15 | 3.75 | |
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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