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Individual Calculations November 2009 |
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| Attard, Ivan Total change: -33.90 | |   |
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| 2nd Sunday Open 2009 | Sliema | MLT | 2009-02-08 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1897 | 1713 | 1.00 | 4 | -0.12 | 25 | -3.00 | |
|  Beulertz, Stefan | | | 1834 | MLT | 0.50 | 1 | 0.16 | 25 | 4.00 | |  Vella, Duncan | | | 2000 | MLT | 0.50 | 1 | 0.34 | 25 | 8.50 | | | Sammut Briffa, Peter | | | 2025 | MLT | 0.00 | 1 | -0.14 | 25 | -3.50 | | | Psaila, Clarence | | | 1729 | MLT | 0.00 | 1 | -0.48 | 25 | -12.00 | |
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 | | Summer Open 2009 | Sliema | MLT | 2009-07-25 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1938 | 1694 | 0.00 | 3 | -0.65 | 15 | -9.75 | |
| | Grbic, Milorad | | | 2094 * | SRB | 0.00 | 1 | -0.08 | 15 | -1.20 | | | Richards, John | | | 1799 | MLT | 0.00 | 1 | -0.36 | 15 | -5.40 | | | Pettersson, Alexander | | | 1920 | MLT | 0.00 | 1 | -0.21 | 15 | -3.15 | | | * 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 | | Candidates 2009 | Sliema | MLT | 2009-08-11 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1803 | 1694 | 0.50 | 4 | -0.91 | 15 | -13.65 | |
| | Richards, John | | | 1799 | MLT | 0.00 | 1 | -0.36 | 15 | -5.40 | | | Psaila, Clarence | | | 1772 | MLT | 0.50 | 1 | 0.11 | 15 | 1.65 | | | Ibrahim, Ayman | | | 1806 | MLT | 0.00 | 1 | -0.35 | 15 | -5.25 | | | Sammut, Ron | | | 1836 | MLT | 0.00 | 1 | -0.31 | 15 | -4.65 | |
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 |
| 1821 | 1694 | 0.50 | 3 | -0.50 | 15 | -7.50 | |
| | Pettersson, Alexander | | | 1911 | MLT | 0.00 | 1 | -0.22 | 15 | -3.30 | | | Xuereb, Andre | | | 1715 | MLT | 0.00 | 1 | -0.47 | 15 | -7.05 | | | Sammut, Ron | | | 1836 | MLT | 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) | | |
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