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Individual Calculations April 2009 |
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| Guevara, Robert Total change: -7.65 | |   |
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| Happy New Year Open | New York, New York | USA | 2009-01-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2228 | 2103 | 0.50 | 2 | -0.25 | 15 | -3.75 | |
|  Rohde, Michael A | g | | 2453 | USA | 0.00 | 1 | -0.11 | 15 | -1.65 | |  Farber, Nelson M | | | 2003 | USA | 0.50 | 1 | -0.14 | 15 | -2.10 | |
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 Liberty Bell Open | Philadelphia, Pennsylvania | USA | 2009-01-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2097 | 2103 | 3.00 | 6 | -0.03 | 15 | -0.45 | |
| | Esserman, Marc R | | | 2345 | USA | 0.00 | 1 | -0.20 | 15 | -3.00 | | | Sells, Philip G | | | 1847 | USA | 1.00 | 1 | 0.19 | 15 | 2.85 | | | Lima, Louis | | | 1975 | USA | 1.00 | 1 | 0.33 | 15 | 4.95 | | | Times, Jerald W | | | 2196 | USA | 0.50 | 1 | 0.13 | 15 | 1.95 | | | Greanias, Steven D | | | 2140 | USA | 0.00 | 1 | -0.45 | 15 | -6.75 | | | Pinkerton, James C | | | 2078 | USA | 0.50 | 1 | -0.03 | 15 | -0.45 | |
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 |
| 2203 | 2103 | 0.50 | 2 | -0.23 | 15 | -3.45 | |
| | Castaneda, Andres | | | 2171 | USA | 0.50 | 1 | 0.09 | 15 | 1.35 | | | Minear, Peter | | | 2235 | USA | 0.00 | 1 | -0.32 | 15 | -4.80 | |
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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