| 1620.2 | 1605.5 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1989 | 1983.2 | Western Cape HS Individuals 2023 (U19 Boys) | 5 | 2023-04-02 | S | W | 0 | 0.11 | -0.11 | -1.8 | 0.1 | -0.1 | -2 |
| 1511.3 | 1499.5 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1852.5 | 1878.8 | South African Junior Closed Chess Championships 2022 (U18 Open) | 1 | 2022-03-28 | S | W | 0 | 0.14 | -0.14 | -2.8 | 0.1 | -0.1 | -2 |
| 1414.1 | 1310.6 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1801.7 | 1591.4 | Cape Winelands Schools Trials 2021 (U18 Boys) | 5 | 2021-10-16 | R | W | 0 | 0.09 | -0.09 | -1.1 | 0.21 | -0.21 | -4.2 |
| 1402 | 1152.6 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1693.5 | 1577.6 | Cape Winelands Schools Trials 1 2020 (U15 Boys) | 5 | 2020-02-15 | R | B | 0 | 0.12 | -0.12 | -1.4 | 0 | 0 | 0 |
| 1162.5 | 1150.8 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1655.9 | 1522.2 | CW Schools Open 2019 (U15 Boys) | 3 | 2019-02-02 | R | B | 0.5 | 0 | 0.5 | 6 | 0.03 | 0.47 | 9.4 |
