| 1626.5 | 1616 | 20 | 20 | Van Heerden, EJ (Ethan Joel) | | WCW | 1613.7 | 1585.3 | Cape Winelands Schools - Trials 1 2025 (U17 Boys) | 5 | 2025-02-08 | S | B | 0.5 | 0.47 | 0.03 | 0.5 | 0.49 | 0.01 | 0.2 |
| 1550.3 | 1536.3 | 20 | 20 | Van Heerden, EJ (Ethan Joel) | | WCW | 1504.1 | 1478.8 | Cape Winelands - Top Schools 2024 (U18 Mixed) | 4 | 2024-07-27 | S | W | 0.5 | 0.6 | -0.1 | -1.7 | 0.61 | -0.11 | -2.2 |
| 1471.7 | 1465.4 | 20 | 20 | Van Heerden, EJ (Ethan Joel) | | WCW | 1546.6 | 1524.3 | Cape Town Masters Challenge 2023 (Open) | 4 | 2023-01-07 | S | W | 1 | 0.45 | 0.55 | 11 | 0.47 | 0.53 | 10.6 |
| 1364.5 | 1263.7 | 20 | 20 | Van Heerden, EJ (Ethan Joel) | | WCW | 1288.2 | 1257.5 | South African Schools Individuals Chess Championships 2019 (U13 Open) | 5 | 2019-06-20 | S | B | 1 | 0.55 | 0.45 | 7.5 | 0.47 | 0.53 | 10.6 |
| 1221.1 | 978 | 20 | 20 | Van Heerden, EJ (Ethan Joel) | | WCW | 1173.6 | 1158.8 | Stellenberg Youth Chess Championship 2019 (D) | 2 | 2019-05-01 | S | B | 1 | 0.51 | 0.49 | 8.1 | 0.25 | 0.75 | 15 |
