| 1802 | 1812.6 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1800.8 | 1819.5 | Western Cape Closed Championship 2022 (Championship) | 2 | 2022-09-24 | S | W | 1 | 0.54 | 0.46 | 8 | 0.53 | 0.47 | 9.4 |
| 1746.1 | 1741.8 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1854.1 | 1873.3 | South African Open 2022 (Championship) | 3 | 2022-07-10 | S | B | 1 | 0.33 | 0.67 | 13.4 | 0.31 | 0.69 | 13.8 |
| 1774.8 | 1771.7 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1715.1 | 1717.2 | WP Open 2021 (Championship) | 4 | 2021-05-09 | S | W | 1 | 0.61 | 0.39 | 6.8 | 0.61 | 0.39 | 7.8 |
| 1784.3 | 1783.5 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1707.5 | 1709.9 | Western Cape Closed 2020 (Championship) | 6 | 2021-03-28 | S | B | 0 | 0.55 | -0.55 | -9.4 | 0.54 | -0.54 | -10.8 |
| 1730.7 | 1723.3 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1702.8 | 1704.6 | Western Cape Schools 2020 (U15 Boys) | 5 | 2020-03-15 | S | B | 0.5 | 0.49 | 0.01 | 0.2 | 0.48 | 0.02 | 0.4 |
| 1533.5 | 1529.8 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1708.3 | 1755.2 | Western Cape Schools Individuals 2019 (U15 Boys) | 4 | 2019-05-04 | S | W | 0 | 0.34 | -0.34 | -5.6 | 0.28 | -0.28 | -5.6 |
| 1440.5 | 1442.1 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1658.2 | 1666.6 | 2019 South African Junior Closed Chess Championship (U14 Open) | 6 | 2019-03-19 | S | B | 0 | 0.2 | -0.2 | -4 | 0.2 | -0.2 | -4 |
| 1323.3 | 1330.7 | 20 | 20 | Van Der Merwe, A (Alexander) | | WCT | 1543.6 | 1543 | Western Cape Schools Individuals 2018 (U13 Boys) | 5 | 2018-05-20 | S | B | 1 | 0.2 | 0.8 | 13.3 | 0.21 | 0.79 | 15.8 |
