| 1616.9 | 1627.1 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | JM | WCT | 1723.1 | 1640.6 | South African Junior Closed Chess Championships 2025 (U10 Open) | 4 | 2025-04-01 | S | B | 1 | 0.33 | 0.67 | 13.4 | 0.44 | 0.56 | 11.2 |
| 1531.6 | 1481.5 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1674.5 | 1589.7 | CT Metro Schools Individual Closed 2025 (U11 Open) | 3 | 2025-03-01 | S | W | 0.5 | 0.38 | 0.12 | 2 | 0.42 | 0.08 | 1.6 |
| 1431.8 | 1421.1 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1572.8 | 1528.5 | South African Junior Closed Chess Championship 2024 (U10 Open) | 4 | 2024-04-28 | S | B | 0 | 0.29 | -0.29 | -5.8 | 0.33 | -0.33 | -6.6 |
| 1431.8 | 1421.1 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1572.8 | 1528.5 | Western Cape PS Individuals Championship 2024 (U9 Boys) | 6 | 2024-05-05 | S | B | 0.5 | 0.29 | 0.21 | 3.5 | 0.33 | 0.17 | 3.4 |
| 1386 | 1320.6 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1502.3 | 1472.2 | Cape Town Metro Schools Chess Closed Individuals 2024 (U9 Boys) | 5 | 2024-03-03 | S | B | 0 | 0.32 | -0.32 | -5.3 | 0.28 | -0.28 | -5.6 |
