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Individual Calculations November 2009 |
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| Vella, Duncan Total change: 10.80 | |   |
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| 2nd Sunday Open 2009 | Sliema | MLT | 2009-02-08 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1864 | 2000 | 4.00 | 5 | 0.64 | 15 | 9.60 | |
|  Sciortino, Marilyn | | | 1864 | MLT | 1.00 | 1 | 0.32 | 15 | 4.80 | |  Sammut Briffa, Peter | | | 2025 | MLT | 0.50 | 1 | 0.03 | 15 | 0.45 | | | Attard, Ivan | | | 1713 | MLT | 0.50 | 1 | -0.34 | 15 | -5.10 | | | Stefanovic, Bora | | | 1909 | MLT | 1.00 | 1 | 0.38 | 15 | 5.70 | | | Richards, John | | | 1810 | MLT | 1.00 | 1 | 0.25 | 15 | 3.75 | |
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) | | | | Candidates 2009 | Sliema | MLT | 2009-08-11 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1936 | 2044 | 3.50 | 5 | 0.32 | 15 | 4.80 | |
| | Sammut, Ron | | | 1836 | MLT | 1.00 | 1 | 0.23 | 15 | 3.45 | | | Sacco, Sam | | | 1887 | MLT | 1.00 | 1 | 0.29 | 15 | 4.35 | | | Gauci, Joseph | | | 2093 | MLT | 0.50 | 1 | 0.07 | 15 | 1.05 | | | Richards, John | | | 1799 | MLT | 1.00 | 1 | 0.20 | 15 | 3.00 | | | Zerafa, Patrick | c | | 2063 | MLT | 0.00 | 1 | -0.47 | 15 | -7.05 | |
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) | | | | 74th Malta Chess Championship Finals | Sliema | MLT | 2009-10-03 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2023 | 2044 | 5.00 | 10 | -0.24 | 15 | -3.60 | |
| | Gauci, Joseph | | | 2090 | MLT | 1.00 | 1 | 0.56 | 15 | 8.40 | | | Pace, Colin | c | | 2140 | MLT | 0.00 | 1 | -0.37 | 15 | -5.55 | | | Zerafa, Robert | | | 2002 | MLT | 0.50 | 1 | -0.06 | 15 | -0.90 | | | Zerafa, Patrick | c | | 2063 | MLT | 0.00 | 1 | -0.47 | 15 | -7.05 | | | Said, Oliver | | | 1821 | MLT | 0.50 | 1 | -0.28 | 15 | -4.20 | | | Gauci, Joseph | | | 2090 | MLT | 0.50 | 1 | 0.06 | 15 | 0.90 | | | Pace, Colin | c | | 2140 | MLT | 0.00 | 1 | -0.37 | 15 | -5.55 | | | Zerafa, Robert | | | 2002 | MLT | 1.00 | 1 | 0.44 | 15 | 6.60 | | | Zerafa, Patrick | c | | 2063 | MLT | 0.50 | 1 | 0.03 | 15 | 0.45 | | | Said, Oliver | | | 1821 | MLT | 1.00 | 1 | 0.22 | 15 | 3.30 | |
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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