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Individual Calculations October 2017 |
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| Van Der Westhuizen, Donald Total change: 13.60 | |   |
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| 2017 Etienne Lewis Tshwane Chess Trails (Open) | Pretoria | RSA | 2017-08-31 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1654 | 1690 | 2.50 | 4 | 0.34 | 40 | 13.60 | |
|  Cruywagen, Dewan | | | 1388 | RSA | 1.00 | 1 | 0.15 | 40 | 6.00 | |  Ponelis, Albert A. | | | 1932 | RSA | 0.00 | 1 | -0.20 | 40 | -8.00 | | | Booysen, Willem-Hendrik | | | 1515 | RSA | 1.00 | 1 | 0.27 | 40 | 10.80 | | | Khumalo, Keith | | | 1779 | RSA | 0.50 | 1 | 0.12 | 40 | 4.80 | |
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) | | |
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