| 1544.6 | 1547 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1547 | 1545.8 | 2025 Gauteng Top Schools Teams (U11) | 2 | 2025-08-29 | S | W | 1 | 0.54 | 0.46 | 7.6 | 0.54 | 0.46 | 9.2 |
| 1431.2 | 1418.1 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1397.3 | 1391.6 | Gauteng Top Schools 2024 (U11 Open) | 5 | 2024-10-04 | S | B | 1 | 0.5 | 0.5 | 8.3 | 0.49 | 0.51 | 10.2 |
| 1408.4 | 1386.7 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1456.4 | 1450.8 | D4 Tshwane South District Schools Teams Chess Tournament 2024 (U11A) | 2 | 2024-08-03 | S | B | 0 | 0.4 | -0.4 | -6.6 | 0.38 | -0.38 | -7.6 |
| 1444.7 | 1424.4 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1346.8 | 1337.4 | 2024 Tshwane South School District CLOSED Individual Championships (U11 Mixed) | 4 | 2024-05-11 | S | B | 0 | 0.57 | -0.57 | -9.5 | 0.56 | -0.56 | -11.2 |
| 1538.5 | 1536.7 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1379.5 | 1376.8 | 2024 Constantiapark Open (D1) | 4 | 2024-02-17 | S | B | 1 | 0.64 | 0.36 | 6 | 0.64 | 0.36 | 7.2 |
| 1443.9 | 1438.2 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1295.8 | 1277.6 | 2023 Etienne Lewis Closed Tournament (U10) | 6 | 2023-08-27 | S | W | 1 | 0.71 | 0.29 | 5.5 | 0.73 | 0.27 | 5.4 |
