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Individual Calculations July 2009 |
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| Koitka, Jakub Total change: 41.55 | |   |
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| Grand Prix Gorzowa Wlkp | Gorzowa Wlkp | POL | 2009-02-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2016 | 1680 | 0.50 | 3 | 0.14 | 15 | 2.10 | |
|  Dragun, Kamil | | | 2030 | POL | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Siwiec, Arkadiusz | | | 2030 | POL | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Sokolowski, Roman | | | 1987 | POL | 0.50 | 1 | 0.36 | 15 | 5.40 | |
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) | | | | POL Boys Championship U-12 | Leba | POL | 2009-03-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1776 | 1680 | 1.50 | 6 | -0.76 | 15 | -11.40 | |
| | Zebracki, Tomasz | | | 1795 | POL | 0.50 | 1 | 0.16 | 15 | 2.40 | |  Khamidov, Komil | | | 1972 | POL | 0.00 | 1 | -0.15 | 15 | -2.25 | | | Zadlo, Maciej | | | 1667 | POL | 0.50 | 1 | -0.02 | 15 | -0.30 | | | Karwowski, Kacper | | | 1781 | POL | 0.00 | 1 | -0.36 | 15 | -5.40 | | | Gajek, Radoslaw | | | 1720 | POL | 0.00 | 1 | -0.44 | 15 | -6.60 | | | Tomaszewski, Kacper | | | 1718 | POL | 0.50 | 1 | 0.05 | 15 | 0.75 | |
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) | | | | V LUBUSKA WIOSNA SZACHOWA - OPEN A | Gorzow Wlkp. | POL | 2009-04-14 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1807 | 1736 | 6.00 | 8 | 2.61 | 15 | 39.15 | |
| | Aliavdin, Nikolai | m | | 2086 | BLR | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Sokolowski, Roman | | | 1987 | POL | 0.50 | 1 | 0.31 | 15 | 4.65 | | | Gromala, Radoslaw | | | 1570 | POL | 1.00 | 1 | 0.28 | 15 | 4.20 | | | Kugler, Pawel | | | 1748 | POL | 1.00 | 1 | 0.52 | 15 | 7.80 | | | Onyszko, Michal | | | 1463 | POL | 0.50 | 1 | -0.33 | 15 | -4.95 | | | Swiderski, Radoslaw | | | 1664 | POL | 1.00 | 1 | 0.40 | 15 | 6.00 | | | Rutkowski, Maciej | m | | 2086 | POL | 1.00 | 1 | 0.89 | 15 | 13.35 | | | Lewko, Pawel | | | 1849 | POL | 1.00 | 1 | 0.65 | 15 | 9.75 | |
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) | | | | Grand Prix Gorzowa Wlkp. - maj 2009 | Gorzow | POL | 2009-05-29 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1786 | 1736 | 3.00 | 5 | 0.78 | 15 | 11.70 | |
| | Dragun, Kamil | | | 2086 | POL | 0.00 | 1 | -0.11 | 15 | -1.65 | | | Drgas, Marlena | | | 1504 | POL | 1.00 | 1 | 0.21 | 15 | 3.15 | | | Chomski, Maciej | | | 1841 | POL | 0.50 | 1 | 0.14 | 15 | 2.10 | | | Delekta, Filip | | | 1727 | POL | 1.00 | 1 | 0.49 | 15 | 7.35 | | | Czaplinski, Piotr | | | 1774 | POL | 0.50 | 1 | 0.05 | 15 | 0.75 | |
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) | | |
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