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Individual Calculations November 2009 |
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| Pettersson, Alexander Total change: 23.50 | |   |
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| 2nd Sunday Open 2009 | Sliema | MLT | 2009-02-08 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1880 | 1911 | 2.50 | 5 | -0.21 | 25 | -5.25 | |
|  Beulertz, Stefan | | | 1834 | MLT | 0.50 | 1 | -0.11 | 25 | -2.75 | | | Vella, Duncan | | | 2000 | MLT | 0.00 | 1 | -0.38 | 25 | -9.50 | | | Sammut, Ron | | | 1826 | MLT | 1.00 | 1 | 0.38 | 25 | 9.50 | |  Attard, Ivan | | | 1713 | MLT | 1.00 | 1 | 0.24 | 25 | 6.00 | | | Sammut Briffa, Peter | | | 2025 | MLT | 0.00 | 1 | -0.34 | 25 | -8.50 | |
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) | | | | Summer Open 2009 | Sliema | MLT | 2009-07-25 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1799 | 1920 | 4.50 | 5 | 1.21 | 25 | 30.25 | |
| | Aguilar, Filipina | | wc | 1855 | MLT | 0.50 | 1 | -0.09 | 25 | -2.25 | | | Richards, John | | | 1799 | MLT | 1.00 | 1 | 0.34 | 25 | 8.50 | | | Stefanovic, Bora | | | 1930 | MLT | 1.00 | 1 | 0.51 | 25 | 12.75 | | | Xuereb, Andre | | | 1715 | MLT | 1.00 | 1 | 0.24 | 25 | 6.00 | | | Attard, Ivan | | | 1694 | MLT | 1.00 | 1 | 0.21 | 25 | 5.25 | |
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) | | | | 7th Mediterranean Men and Women Championship 2009 | Rijeka | CRO | 2009-09-11 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2074 | 1911 | 2.00 | 8 | -0.45 | 25 | -11.25 | |
| | Golubovic, Boris | m | | 2311 * | CRO | 0.00 | 1 | -0.08 | 25 | -2.00 | | | Melas, Renos | | | 2165 | CYP | 0.00 | 1 | -0.19 | 25 | -4.75 | | | Mravic, Filip | | | 1813 | CRO | 0.00 | 1 | -0.63 | 25 | -15.75 | | | Tonel, Giulia | | | 1993 | ITA | 1.00 | 1 | 0.61 | 25 | 15.25 | | | Vujic-Katanic, Branka | | wf | 2115 | SRB | 0.50 | 1 | 0.26 | 25 | 6.50 | | | Jose Queralto, Daniel | | | 2086 | AND | 0.50 | 1 | 0.23 | 25 | 5.75 | | | Baptista, Ana Filipa | | wf | 2177 | POR | 0.00 | 1 | -0.18 | 25 | -4.50 | | | Kanceljak, Dalia | | | 1930 | CRO | 0.00 | 1 | -0.47 | 25 | -11.75 | | | * Rating difference of more than 400. Please read more at FIDE Handbook |
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 | | Open October 2009 | Sliema | MLT | 2009-10-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1866 | 1911 | 4.00 | 6 | 0.65 | 15 | 9.75 | |
| | Attard, Ivan | | | 1694 | MLT | 1.00 | 1 | 0.22 | 15 | 3.30 | | | Stefanovic, Bora | | | 1930 | MLT | 1.00 | 1 | 0.53 | 15 | 7.95 | | | Carosso, Andrea | | | 2029 | ITA | 0.00 | 1 | -0.34 | 15 | -5.10 | | | Psaila, Clarence | | | 1779 | MLT | 1.00 | 1 | 0.32 | 15 | 4.80 | | | Beulertz, Stefan | | | 1925 | MLT | 0.50 | 1 | 0.02 | 15 | 0.30 | | | Sammut, Ron | | | 1836 | MLT | 0.50 | 1 | -0.10 | 15 | -1.50 | |
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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