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Individual Calculations April 2019 |
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| Potgieter, Edward Total change: 23.20 | |   |
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| 2019 Waterkloof Open (B) | Pretoria | RSA | 2019-03-02 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1147 | 1165 | 1.00 | 2 | -0.05 | 40 | -2.00 | |
|  Smit, Yoshua | | | 1163 | RSA | 0.00 | 1 | -0.50 | 40 | -20.00 | |  Malan, Aiden | | | 1130 | RSA | 1.00 | 1 | 0.45 | 40 | 18.00 | |
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) | | | | South African Junior Closed Chess Championships 2019 (u12 Open) | Benoni | RSA | 2019-03-16 |
| Rc | Ro | w | n | change | K | K*chg | Game |
| 1189 | 1165 | 2.50 | 4 | 0.63 | 40 | 25.20 | |
| | Simpson, Michael | | | 1269 | RSA | 0.00 | 1 | -0.36 | 40 | -14.40 | | | Boshoma, Chifundo | | | 1078 | RSA | 1.00 | 1 | 0.38 | 40 | 15.20 | | | Senekal, Frederick Petrus | | | 1156 | RSA | 1.00 | 1 | 0.49 | 40 | 19.60 | | | Van Schaik, Migael | | | 1253 | 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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