| 1577.3 | 1572.7 | 28 | 28 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1543.9 | 1534.2 | 2026 D4 District Individuals (U12 Boys) | 3 | 2026-05-30 | S | B | 0.5 | 0.5 | 0 | 0.1 | 0.5 | 0 | -0.1 |
| 1580.4 | 1574.9 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1589.7 | 1595.7 | 2026 Piet Robbertse Open Chess Tournament (B) | 5 | 2026-02-08 | S | W | 1 | 0.53 | 0.47 | 6.6 | 0.52 | 0.48 | 7.2 |
| 1527.6 | 1521.7 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1507.1 | 1501.3 | 2025 Midstream Open Chess Tournament (U12) | 5 | 2025-08-25 | S | W | 1 | 0.57 | 0.43 | 7.1 | 0.57 | 0.43 | 8.6 |
| 1527.6 | 1521.7 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1507.1 | 1501.3 | 2025 Etienne Lewis Closed Chess Tournament (U12) | 6 | 2025-08-10 | S | B | 1 | 0.48 | 0.52 | 9.8 | 0.48 | 0.52 | 10.4 |
| 1529.5 | 1521 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1525.5 | 1522.3 | 2025 Tshwane South School District Individual Finals (D4) (U11 Boys) | 5 | 2025-05-10 | S | W | 1 | 0.55 | 0.45 | 7.5 | 0.54 | 0.46 | 9.2 |
