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Individual Calculations April 2019 |
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| Lubbe, David Stefanus Total change: 22.00 | |   |
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| 2019 Waterkloof Open (A) | Pretoria | RSA | 2019-03-02 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1476 | 1322 | 1.00 | 4 | -0.31 | 40 | -12.40 | |
|  Jacobs, Cavan | | | 1702 | RSA | 0.00 | 1 | -0.09 | 40 | -3.60 | |  Grobbelaar-Oertel, Jacqui | | | 1589 | RSA | 0.00 | 1 | -0.18 | 40 | -7.20 | | | Nguyen, Minh | | | 1237 | RSA | 0.00 | 1 | -0.62 | 40 | -24.80 | | | Van Heerden, Lara | | | 1376 | RSA | 1.00 | 1 | 0.58 | 40 | 23.20 | |
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) | | | | South African Junior Closed Chess Championships 2019 (u14 Open) | Benoni | RSA | 2019-03-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1558 | 1322 | 2.00 | 5 | 0.86 | 40 | 34.40 | |
| | Smit, Devon | | | 1530 | RSA | 0.00 | 1 | -0.23 | 40 | -9.20 | | | Oosthuizen, Michal Jacobus | | | 1678 | RSA | 0.50 | 1 | 0.39 | 40 | 15.60 | | | Lefyedi, Thatego | | | 1375 | RSA | 1.00 | 1 | 0.57 | 40 | 22.80 | | | Modi, Yashil | f | | 1722 * | RSA | 0.00 | 1 | -0.08 | 40 | -3.20 | | | Kruger, Matthew | | | 1483 | RSA | 0.50 | 1 | 0.21 | 40 | 8.40 | | | * 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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