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Individual Calculations April 2009 |
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| Guo, Gill Y Total change: 9.00 | |   |
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| 41st Annual Liberty Bell Open | Philadelphia, Pennsylvania | USA | 2009-01-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2072 | 2106 | 2.00 | 3 | 0.36 | 15 | 5.40 | |
|  Odeh, Kenneth | | | 1991 | NGR | 1.00 | 1 | 0.34 | 15 | 5.10 | | | Pozarek, Stephen J | | | 2164 | USA | 1.00 | 1 | 0.58 | 15 | 8.70 | |  Strenzwilk, Denis | | | 2062 | USA | 0.00 | 1 | -0.56 | 15 | -8.40 | |
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) | | | | 39th Annual World Amateur Team & US Team East | Parsippany, New Jersey | USA | 2009-02-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2182 | 2106 | 1.00 | 2 | 0.21 | 15 | 3.15 | |
| | Cherniack, Alex | | | 2222 | USA | 0.00 | 1 | -0.34 | 15 | -5.10 | | | Teasley, Dorothy | | wm | 2141 | USA | 1.00 | 1 | 0.55 | 15 | 8.25 | |
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) | | | | 41st Annual Virginia Open | McLean, Virginia | USA | 2009-02-27 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2108 | 2106 | 2.00 | 4 | 0.03 | 15 | 0.45 | |
| | Kaufman, Raymond | m | | 2308 | USA | 0.50 | 1 | 0.26 | 15 | 3.90 | | | Passov, Alex | | | 2179 | USA | 0.00 | 1 | -0.40 | 15 | -6.00 | | | Grinberg, Matthew | | | 2094 | USA | 0.50 | 1 | -0.02 | 15 | -0.30 | | | Saperstein, Craig | | | 1851 | USA | 1.00 | 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) | | |
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