| 1526.6 | 1182.2 | 20 | 20 | Grobler, JTW (Johannes Theodorus Wessel) | | GTP | 1611.1 | 931.2 | Gauteng Top Schools 2024 (U19 Open) | 5 | 2024-10-05 | R | B | 0 | 0.36 | -0.36 | -4.8 | 0.75 | -0.75 | -15 |
| 1543.6 | 1530.6 | 20 | 20 | Grobler, JTW (Johannes Theodorus Wessel) | | GTP | 1512.5 | 1517.3 | D4 Tshwane South District Schools Teams Chess Tournament 2024 (U19A) | 3 | 2024-08-03 | S | B | 0 | 0.49 | -0.49 | -8.1 | 0.47 | -0.47 | -9.4 |
| 1420.2 | 1405 | 20 | 20 | Grobler, JTW (Johannes Theodorus Wessel) | | GTP | 1403.4 | 1383.9 | 2023 Tshwane Chess Open Registration Tournament (B1) | 1 | 2023-01-28 | S | B | 1 | 0.48 | 0.52 | 8.6 | 0.48 | 0.52 | 10.4 |
| 1418.4 | 1399.2 | 20 | 20 | Grobler, JTW (Johannes Theodorus Wessel) | | GTP | 1305.3 | 1304.3 | 2022 Etienne Lewis (U16 Open) | 1 | 2022-09-02 | S | W | 1 | 0.67 | 0.33 | 6.2 | 0.65 | 0.35 | 7 |
| 1532 | 936.6 | 20 | 20 | Grobler, JTW (Johannes Theodorus Wessel) | | GTP | 1330.7 | 605.2 | D4 Individuals 2022 (U15 Open) | 4 | 2022-04-23 | R | W | 1 | 0.78 | 0.22 | 2.6 | 0.93 | 0.07 | 1.4 |
