| 1427.9 | 1435.6 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | JM | WCT | 1756.3 | 1746.4 | Helderberg Chess Club Open 2026 (U11 Mixed) | 1 | 2026-01-17 | S | W | 0 | 0.16 | -0.16 | -2.7 | 0.18 | -0.18 | -3.6 |
| 1489.3 | 1457.3 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | JM | WCT | 1746 | 1712.8 | UCT Open Chess Championship 2025 (U10) | 3 | 2025-10-11 | R | B | 0 | 0.16 | -0.16 | -1.7 | 0.16 | -0.16 | -3.2 |
| 1360 | 1389.6 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1642.7 | 1722.5 | Cape of Good Hope Open 2025 (U10) | 2 | 2025-02-22 | R | W | 0 | 0.21 | -0.21 | -2.3 | 0.15 | -0.15 | -3 |
| 1360 | 1389.6 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1642.7 | 1722.5 | Laerskool Welgemoed Rapid 2025 (U12) | 3 | 2025-02-15 | R | W | 0 | 0.21 | -0.21 | -2.5 | 0.15 | -0.15 | -3 |
| 1360 | 1311.8 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1642.7 | 1597.9 | CT Metro North Schools Chess Individual Trials 2025 (U11 Open) | 3 | 2025-02-08 | S | W | 0 | 0.21 | -0.21 | -3.5 | 0.21 | -0.21 | -4.2 |
| 1358.4 | 1361.1 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1605.3 | 1722.7 | 2025 Kraaifontein Open Chess Championships (U12 Rapid) | 2 | 2025-01-04 | R | W | 0 | 0.25 | -0.25 | -3 | 0.12 | -0.12 | -2.4 |
| 1270.6 | 1231.5 | 20 | 20 | Van Der Merwe, S (Schalk Wolf) | | WCT | 1546.4 | 1656 | UCT Open Chess Championship 2024 (U10) | 6 | 2024-10-13 | R | B | 0 | 0.14 | -0.14 | -1.5 | 0 | 0 | 0 |
