| 1530.3 | 1481.3 | 20 | 20 | Van Heerden, EJ (Ethan Joel) | | WCW | 1590.7 | 1554.4 | Paarl Boys High Chess Festival 2023 (Elite Division) | 6 | 2023-10-14 | S | W | 1 | 0.47 | 0.53 | 8.8 | 0.46 | 0.54 | 10.8 |
| 1488.7 | 1477.7 | 20 | 20 | Van Heerden, EJ (Ethan Joel) | | WCW | 1366.4 | 1339.9 | Western Cape Schools Chess 2022 (U15 Boys) | 5 | 2022-05-08 | S | W | 0 | 0.68 | -0.68 | -11.6 | 0.7 | -0.7 | -14 |
| 1471.7 | 1456.8 | 20 | 20 | Van Heerden, EJ (Ethan Joel) | | WCW | 1326.6 | 1319.1 | 2020 Metro Trials (U13 Boys) | 3 | 2020-03-14 | S | B | 0.5 | 0.63 | -0.13 | -2.2 | 0.62 | -0.12 | -2.4 |
| 1324.9 | 1304.7 | 20 | 20 | Van Heerden, EJ (Ethan Joel) | | WCW | 1266.4 | 1236.4 | 2019 Wild Card Chess Championship (U12 Open) | 2 | 2020-01-09 | S | B | 0 | 0.53 | -0.53 | -10.6 | 0.54 | -0.54 | -10.8 |
