| 1418.2 | 1431.2 | 20 | 20 | Van Der Merwe, O (Oliver) | | WEG | 1520 | 1547.2 | Eden Chess Trials 2 2025 (U12) | 5 | 2025-03-15 | S | W | 0.5 | 0.42 | 0.08 | 1.3 | 0.41 | 0.09 | 1.8 |
| 1266.7 | 1269.5 | 20 | 20 | Van Der Merwe, O (Oliver) | | WEG | 1515.7 | 1523.8 | George Schools Chess Trials 2 2025 (U11 Boys) | 4 | 2025-02-15 | S | B | 0 | 0.17 | -0.17 | -2.8 | 0.16 | -0.16 | -3.2 |
| 1321.7 | 1325.3 | 20 | 20 | Van Der Merwe, O (Oliver) | | WEG | 1396.1 | 1388.8 | Western Cape Top Schools 2023 (U9 Mixed) | 2 | 2023-09-02 | S | B | 1 | 0.37 | 0.63 | 10.5 | 0.38 | 0.62 | 12.4 |
| 1234.3 | 1215.3 | 20 | 20 | Van Der Merwe, O (Oliver) | | WEG | 1405.7 | 1405.8 | Eden Top Schools 2023 (U9 Mix) | 2 | 2023-08-19 | S | W | 1 | 0.34 | 0.66 | 11 | 0.32 | 0.68 | 13.6 |
| 1248.9 | 1227.9 | 20 | 20 | Van Der Merwe, O (Oliver) | | WEG | 1401.5 | 1401.3 | Top Schools 2023 (U9) | 2 | 2023-07-29 | S | W | 0 | 0.36 | -0.36 | -6 | 0.34 | -0.34 | -6.8 |
| 1333.2 | 1329.8 | 20 | 20 | Van Der Merwe, O (Oliver) | | WEG | 1368.9 | 1371.4 | Eden Trials 2+3 2023 (U10) | 8 | 2023-05-13 | S | W | 0 | 0.5 | -0.5 | -8.3 | 0.49 | -0.49 | -9.8 |
| 1336.5 | 1328.7 | 20 | 20 | Van Der Merwe, O (Oliver) | | WEG | 1305.2 | 1303.9 | George Chess Trials 2 2023 (U9 Boys) | 3 | 2023-02-11 | S | B | 0.5 | 0.49 | 0.01 | 0.2 | 0.49 | 0.01 | 0.2 |
