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Individual Calculations December 2017 |
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| Taffard, Christopher John Total change: 17.60 | |   |
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| 2017 Norths John Purdy Memorial Open | Sydney | AUS | 2017-09-12 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1689 | 1695 | 3.00 | 5 | 0.44 | 40 | 17.60 | |
|  Russell, Paul | c | | 1893 | AUS | 0.00 | 1 | -0.24 | 40 | -9.60 | | | Greenwood, Norman | | | 1570 | AUS | 1.00 | 1 | 0.33 | 40 | 13.20 | |  Willathgamuwa, Rowan | c | | 1907 | AUS | 0.00 | 1 | -0.23 | 40 | -9.20 | | | Weijermars, Tristan | | | 1532 | AUS | 1.00 | 1 | 0.28 | 40 | 11.20 | | | Johnson, Andrew | | | 1542 | AUS | 1.00 | 1 | 0.30 | 40 | 12.00 | |
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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