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Individual Calculations September 2009 |
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| Van De Groep, William Total change: -54.75 | |   |
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| Intomart GfK Open 2009 - group B | Hilversum | NED | 2009-06-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1893 | 2025 | 2.00 | 4 | -0.69 | 25 | -17.25 | |
|  Jamshedy, Ismail | | | 1880 | AFG | 1.00 | 1 | 0.31 | 25 | 7.75 | | | De Heer, Henk | | | 1922 | NED | 0.50 | 1 | -0.14 | 25 | -3.50 | |  Van De Schootbrugge, Gabri | | | 1973 | NED | 0.50 | 1 | -0.07 | 25 | -1.75 | | | Van Dinteren, Andre | | | 1795 | NED | 0.00 | 1 | -0.79 | 25 | -19.75 | |
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) | | | | Hogeschool Zeeland Chess Tournament 2009 | Vlissingen | NED | 2009-08-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2026 | 2025 | 0.50 | 4 | -1.50 | 25 | -37.50 | |
| | Freeke, Matthieu | f | | 2264 | NED | 0.00 | 1 | -0.20 | 25 | -5.00 | | | Lacrosse, Marc | f | | 2184 | BEL | 0.00 | 1 | -0.29 | 25 | -7.25 | | | Snikkers, Naomi | | | 1818 | NED | 0.00 | 1 | -0.77 | 25 | -19.25 | | | Smits, Benjamin | | | 1839 | NED | 0.50 | 1 | -0.24 | 25 | -6.00 | |
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) | | |
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