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Individual Calculations December 2017 |
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| O`connor, Jonathan Total change: 12.80 | |   |
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| Armstrong Cup 2017-18 Rounds 1-2 | Various | IRL | 2017-09-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 2106 | 2209 | 1.50 | 2 | 0.23 | 20 | 4.60 | |
|  Macelligott, Gerard | c | | 2009 | IRL | 0.50 | 1 | -0.26 | 20 | -5.20 | | | Wallace, Paul A. | | | 2203 | IRL | 1.00 | 1 | 0.49 | 20 | 9.80 | |
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) | | | | Armstrong Cup 2017-18 Rounds 3-4 | Various | IRL | 2017-10-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1958 | 2209 | 2.00 | 2 | 0.41 | 20 | 8.20 | |
| | Lokasto, Mariusz | | | 1857 | IRL | 1.00 | 1 | 0.11 | 20 | 2.20 | |  Joyce, John | | | 2058 | IRL | 1.00 | 1 | 0.30 | 20 | 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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