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Individual Calculations September 2017 |
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| O`mahony, Mike J Total change: -26.20 | |   |
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| 104th British Championships Weekend Under 1825 | Llandudno | ENG | 2017-07-28 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1601 | 1699 | 1.00 | 4 | -1.54 | 40 | -61.60 | |
|  Watson, Steven L | | | 1566 | ENG | 0.00 | 1 | -0.68 | 40 | -27.20 | |  Di-Vetta, Andrew | | | 1605 | WLS | 0.00 | 1 | -0.63 | 40 | -25.20 | | | Robinson, Brian | | | 1581 | ENG | 0.50 | 1 | -0.16 | 40 | -6.40 | | | Blencowe, Ian P | | | 1651 | ENG | 0.50 | 1 | -0.07 | 40 | -2.80 | |
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) | | | | 104th British Championships Under 1900 | Llandudno | ENG | 2017-07-31 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1860 | 1699 | 2.00 | 4 | 0.86 | 40 | 34.40 | |
| | Dean, Robert A | | | 1850 | ENG | 0.50 | 1 | 0.20 | 40 | 8.00 | | | Taylor, Robert P | | | 1854 | ENG | 1.00 | 1 | 0.71 | 40 | 28.40 | | | Paul, Nathanael | | | 1871 | ENG | 0.50 | 1 | 0.23 | 40 | 9.20 | | | Gartside, Carl | | | 1863 | ENG | 0.00 | 1 | -0.28 | 40 | -11.20 | |
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) | | | NOTE: K factor changed | | 104th British Championships Under 1750 | Llandudno | ENG | 2017-07-31 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1511 | 1699 | 3.00 | 4 | 0.05 | 20 | 1.00 | |
| | Daly, Grant | | | 1549 | ENG | 1.00 | 1 | 0.30 | 20 | 6.00 | | | McLaren, Thomas | | | 1562 | ENG | 0.50 | 1 | -0.18 | 20 | -3.60 | | | Volovich, Julia | | | 1397 | ENG | 1.00 | 1 | 0.15 | 20 | 3.00 | | | Hewitt, Garry J | | | 1536 | ENG | 0.50 | 1 | -0.22 | 20 | -4.40 | |
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) | | |
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