| 1603.8 | 1593.9 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1507.1 | 1501.3 | 2025 Midstream Open Chess Tournament (U12) | 2 | 2025-08-25 | S | B | 1 | 0.57 | 0.43 | 7.1 | 0.57 | 0.43 | 8.6 |
| 1603.8 | 1593.9 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1507.1 | 1501.3 | Lonehill Chess Academy - 1st Rated Tournament 2025 (B) | 2 | 2025-08-02 | S | W | 1 | 0.65 | 0.35 | 5.8 | 0.65 | 0.35 | 7 |
| 1604.9 | 1598 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1526.5 | 1525.1 | 2025 Chris Greyling Open Chess Tournament (U12) | 5 | 2025-03-15 | S | B | 1 | 0.55 | 0.45 | 7.5 | 0.54 | 0.46 | 9.2 |
| 1496.6 | 1486.5 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1429.2 | 1430.3 | Lardies Ope 2024 (U12) | 4 | 2024-10-26 | S | B | 0 | 0.54 | -0.54 | -9 | 0.52 | -0.52 | -10.4 |
| 1370.5 | 1347.3 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1346.8 | 1337.4 | 2024 Tshwane South School District CLOSED Individual Championships (U11 Mixed) | 5 | 2024-05-11 | S | W | 0 | 0.57 | -0.57 | -9.5 | 0.55 | -0.55 | -11 |
| 1397.8 | 1414.5 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1220.6 | 1227 | CP Ope 2022 (E) | 3 | 2022-02-19 | S | B | 0 | 0.66 | -0.66 | -11 | 0.68 | -0.68 | -13.6 |
| 1370.6 | 1387.9 | 20 | 20 | Van Der Merwe, ZC (Zander Christiaan) | | GTP | 1186.1 | 1184 | 2021 Lardies Ope (F) | 3 | 2021-10-30 | S | B | 0.5 | 0.67 | -0.17 | -2.8 | 0.7 | -0.2 | -4 |
