| 1624.8 | 1658.8 | 20 | 20 | Van Der Merwe, O (Oliver) | | WEG | 1485.1 | 1491.4 | Western Cape Schools Individual Championship 2025 (U11 Boys) | 5 | 2025-05-18 | S | W | 1 | 0.7 | 0.3 | 5 | 0.74 | 0.26 | 5.2 |
| 1551.2 | 1543.3 | 20 | 20 | Van Der Merwe, O (Oliver) | | WEG | 1515.7 | 1523.8 | George Schools Chess Trials 1 2025 (U11 Boys) | 3 | 2025-02-01 | S | W | 0 | 0.58 | -0.58 | -9.6 | 0.56 | -0.56 | -11.2 |
| 1511.3 | 1512.3 | 20 | 20 | Van Der Merwe, O (Oliver) | | WEG | 1368.9 | 1371.4 | Eden Trials 2+3 2023 (U10) | 9 | 2023-05-13 | S | B | 1 | 0.62 | 0.38 | 6.3 | 0.62 | 0.38 | 7.6 |
| 1438.7 | 1444.5 | 20 | 20 | Van Der Merwe, O (Oliver) | | WEG | 1305.2 | 1303.9 | George Chess Trials 3 2023 (U9 Boys) | 5 | 2023-02-25 | S | B | 1 | 0.61 | 0.39 | 6.5 | 0.62 | 0.38 | 7.6 |
