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Individual Calculations July 2009 |
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| Costa, Pierre-Jean Total change: -8.85 | |   |
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| Criteriums - R4-5 | IDF | FRA | 2009-03-08 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1880 | 1884 | 0.50 | 1 | -0.01 | 15 | -0.15 | |
|  Barreira, Jose-Luis | | | 1880 | FRA | 0.50 | 1 | -0.01 | 15 | -0.15 | |
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) | | | | N2 - R8-9 | Various | FRA | 2009-03-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1984 | 1884 | 1.00 | 2 | 0.27 | 15 | 4.05 | |
| | L`huillier, Helene | | | 1959 | FRA | 0.50 | 1 | 0.10 | 15 | 1.50 | |  Manet, Eric | | | 2008 | FRA | 0.50 | 1 | 0.17 | 15 | 2.55 | |
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) | | | | 11e Open international d'Echecs de Saint Quentin en Yvelines | Elancourt | FRA | 2009-04-18 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1899 | 1891 | 2.00 | 7 | -1.44 | 15 | -21.60 | |
| | Jolly, Jean-Francois | f | | 2241 | FRA | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Le Port, Luc | | | 1577 | FRA | 1.00 | 1 | 0.14 | 15 | 2.10 | | | Vallobra, Pierre | | | 2009 | FRA | 0.00 | 1 | -0.34 | 15 | -5.10 | | | Forissier, Nicolas | | | 1967 | FRA | 0.00 | 1 | -0.40 | 15 | -6.00 | | | Ferriere, Patrick | | | 1701 | FRA | 1.00 | 1 | 0.25 | 15 | 3.75 | | | Boussaha, Bilal | | | 1957 | FRA | 0.00 | 1 | -0.41 | 15 | -6.15 | | | Jean, Robert | | | 1842 | FRA | 0.00 | 1 | -0.57 | 15 | -8.55 | |
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) | | | | Criteriums - R6-7 | IDF | FRA | 2009-05-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1955 | 1891 | 1.00 | 1 | 0.59 | 15 | 8.85 | |
| | Duval, Sylvain | | | 1955 | FRA | 1.00 | 1 | 0.59 | 15 | 8.85 | |
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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