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Individual Calculations October 2021 |
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| Maher, John Total change: -22.40 | |   |
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| The 100th Irish Championships 2021 Weekday Open | Dublin | IRL | 2021-08-02 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1397 | 1486 | 0.00 | 1 | -0.62 | 20 | -12.40 | |
|  Reynolds, David W. | | | 1397 | IRL | 0.00 | 1 | -0.62 | 20 | -12.40 | |
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) | | | | The Irish over50 and over65 championship 2021 | Dublin | IRL | 2021-09-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1640 | 1486 | 0.50 | 3 | -0.50 | 20 | -10.00 | |
| | O`connor, Jonathan | | | 1886 * | IRL | 0.00 | 1 | -0.08 | 20 | -1.60 | |  Fitzpatrick, Kevin | | | 1457 | IRL | 0.50 | 1 | -0.04 | 20 | -0.80 | | | Stacey, Derek | | | 1577 | IRL | 0.00 | 1 | -0.38 | 20 | -7.60 | | | * 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) | | |
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