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Individual Calculations December 2017 |
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| Jeffreys, Roger W Total change: -19.80 | |   |
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| 2017 Norths John Purdy Memorial Open | Sydney | AUS | 2017-09-12 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1641 | 1649 | 2.00 | 6 | -0.99 | 20 | -19.80 | |
|  Sirkka, Pertti T | | | 1865 | AUS | 0.00 | 1 | -0.22 | 20 | -4.40 | |  Willathgamuwa, Rowan | c | | 1907 | AUS | 0.50 | 1 | 0.32 | 20 | 6.40 | | | O`callaghan, Scott | | | 1583 | AUS | 0.50 | 1 | -0.09 | 20 | -1.80 | | | Low, Frank | | | 1670 | AUS | 0.00 | 1 | -0.47 | 20 | -9.40 | | | Smyrk, Martin | | | 1249 * | AUS | 1.00 | 1 | 0.08 | 20 | 1.60 | | | Greenwood, Norman | | | 1570 | AUS | 0.00 | 1 | -0.61 | 20 | -12.20 | | | * 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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