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Individual Calculations September 2010 |
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| Perez, Robert M Total change: 0.10 | |   |
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| 4th Annual Philadelphia International | King of Prussia, Pennsylvania | USA | 2010-06-25 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2201 | 2212 | 3.50 | 7 | 0.01 | 25 | 0.25 | |
|  Helfst, Matt | | | 1884 | USA | 1.00 | 1 | 0.13 | 25 | 3.25 | |  Bartell, Thomas | f | | 2376 | USA | 0.00 | 1 | -0.28 | 25 | -7.00 | | | Bayar, Anu | | | 1935 | MGL | 1.00 | 1 | 0.17 | 25 | 4.25 | | | Zierk, Steven C | f | | 2377 | USA | 0.00 | 1 | -0.28 | 25 | -7.00 | | | Holt, Conrad | f | | 2375 | USA | 0.00 | 1 | -0.28 | 25 | -7.00 | | | Studen, Damir | | | 2182 | USA | 1.00 | 1 | 0.46 | 25 | 11.50 | | | Chen, Howard J | | | 2276 | USA | 0.50 | 1 | 0.09 | 25 | 2.25 | |
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) | | | NOTE: K factor changed | | 38th Annual World Open - Open Section | King of Prussia, Pennsylvania | USA | 2010-06-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2209 | 2212 | 3.50 | 8 | -0.60 | 15 | -9.00 | |
| | Ivanov, Alexander | g | | 2538 | USA | 0.00 | 1 | -0.13 | 15 | -1.95 | | | Macak, Stefan | m | | 2411 | SVK | 0.00 | 1 | -0.24 | 15 | -3.60 | | | Ryba, Andrew | | | 2094 | USA | 0.50 | 1 | -0.16 | 15 | -2.40 | | | Shen, Arthur | f | | 2107 | USA | 0.50 | 1 | -0.14 | 15 | -2.10 | | | Ulrich, Tommy | | | 2025 | USA | 1.00 | 1 | 0.26 | 15 | 3.90 | | | Aramil, William J | | | 2276 | USA | 0.00 | 1 | -0.41 | 15 | -6.15 | | | Tuhrim, Richard J | | | 2101 | USA | 1.00 | 1 | 0.35 | 15 | 5.25 | | | Leve, Nitai D | | | 2117 | USA | 0.50 | 1 | -0.13 | 15 | -1.95 | |
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) | | | NOTE: K factor changed | | 2010 US Junior Open | Houston, Texas | USA | 2010-07-23 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1998 | 2212 | 2.00 | 3 | -0.26 | 15 | -3.90 | |
| | Xiong, Jeffery | | | 1825 | USA | 1.00 | 1 | 0.09 | 15 | 1.35 | | | Michaelides, Matthew | | | 2094 | USA | 0.50 | 1 | -0.16 | 15 | -2.40 | | | Heung, Christopher | | | 2074 | USA | 0.50 | 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) | | | NOTE: K factor changed | | 18th Annual Southern Open | Orlando, Florida | USA | 2010-07-30 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2279 | 2212 | 2.50 | 4 | 0.85 | 15 | 12.75 | |
| | Rodriguez, Eric | | | 2308 | USA | 0.50 | 1 | 0.13 | 15 | 1.95 | | | Lugo, Blas | m | | 2396 | USA | 0.00 | 1 | -0.26 | 15 | -3.90 | | | Schoonmaker, Nicholas | c | | 2178 | USA | 1.00 | 1 | 0.45 | 15 | 6.75 | | | Acor, Corey | | | 2232 | USA | 1.00 | 1 | 0.53 | 15 | 7.95 | |
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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