| 1461.6 | 1428.3 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | JM | WCT | 1654.4 | 1628.2 | Western Cape Schools Individual Championship 2025 (U11 Boys) | 2 | 2025-05-17 | S | W | 0 | 0.32 | -0.32 | -5.3 | 0.31 | -0.31 | -6.2 |
| 1415.8 | 1304.1 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1642.7 | 1597.9 | CT Metro North Schools Chess Individual Trials 2025 (U11 Open) | 4 | 2025-02-09 | S | B | 1 | 0.19 | 0.81 | 13.4 | 0.12 | 0.88 | 17.6 |
| 1368.6 | 1392.1 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1605.3 | 1722.7 | 2025 Kraaifontein Open Chess Championships (U12 Rapid) | 3 | 2025-01-04 | R | B | 0 | 0.18 | -0.18 | -2.2 | 0.07 | -0.07 | -1.4 |
| 1356.7 | 1436.2 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1546.4 | 1656 | Laerskool Welgemoed Rapid 2024 (U10) | 3 | 2024-10-19 | R | W | 0 | 0.32 | -0.32 | -3.5 | 0.29 | -0.29 | -5.8 |
| 1356.7 | 1436.2 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1546.4 | 1656 | UCT Open Chess Championship 2024 (U10) | 4 | 2024-10-13 | R | B | 0 | 0.24 | -0.24 | -2.6 | 0.2 | -0.2 | -4 |
