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Individual Calculations April 2019 |
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| Petursson, Gudni Total change: -4.80 | |   |
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| Icelandic Team Chess Championship 2018-19 1st division Rounds 6-9 | Reykjavik | ISL | 2019-02-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2139 | 2045 | 1.00 | 2 | 0.15 | 20 | 3.00 | |
|  Andrason, Pall | | | 1833 | ISL | 1.00 | 1 | 0.23 | 20 | 4.60 | |  Gunnarsson, Jon Viktor | m | | 2445 * | ISL | 0.00 | 1 | -0.08 | 20 | -1.60 | | | * 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) | | | | Icelandic Team Chess Championship 2018-19 3rd division Rounds 5-7 | Reykjavik | ISL | 2019-03-01 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1876 | 2025 | 1.00 | 2 | -0.39 | 20 | -7.80 | |
| | Baldursson, Haraldur | | | 1928 | ISL | 1.00 | 1 | 0.37 | 20 | 7.40 | | | Jonsson, Sigurdur H | | | 1824 | ISL | 0.00 | 1 | -0.76 | 20 | -15.20 | |
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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