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Individual Calculations October 2021 |
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| Lynch, Peter J. Total change: -20.80 | |   |
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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 |
| 1504 | 1661 | 0.00 | 2 | -1.36 | 20 | -27.20 | |
|  Ozarpaci, Mert Can | | | 1346 | TUR | 0.00 | 1 | -0.86 | 20 | -17.20 | |  O`cuilleanain, Oisin | | | 1662 | IRL | 0.00 | 1 | -0.50 | 20 | -10.00 | |
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) | | | | The 100th Irish Championships 2021 Final Weekender | Dublin | IRL | 2021-08-20 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1513 | 1661 | 1.50 | 2 | 0.10 | 20 | 2.00 | |
| | Whelan, Niall P. | | | 1514 | IRL | 1.00 | 1 | 0.30 | 20 | 6.00 | | | Lievens, Karel | | | 1512 | IRL | 0.50 | 1 | -0.20 | 20 | -4.00 | |
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) | | | | The Irish over50 and over65 championship 2021 | Dublin | IRL | 2021-09-24 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1588 | 1661 | 2.00 | 3 | 0.22 | 20 | 4.40 | |
| | O`connell, Gerard | | | 2051 | IRL | 0.00 | 1 | -0.09 | 20 | -1.80 | | | O`connell, Michael Joseph | | | 1452 | IRL | 1.00 | 1 | 0.23 | 20 | 4.60 | | | Grant, David | | | 1261 * | IRL | 1.00 | 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) | | |
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