| 1686.6 | 1681 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1714.7 | 1712.6 | 2025 Etienne Lewis Closed Chess Tournament (U16) | 5 | 2025-08-10 | S | B | 0 | 0.43 | -0.43 | -8.1 | 0.42 | -0.42 | -8.4 |
| 1584.7 | 1580 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1514.8 | 1501 | South African Junior Closed Chess Championship 2024 (U14 Open) | 4 | 2024-04-28 | S | B | 0 | 0.54 | -0.54 | -10.8 | 0.55 | -0.55 | -11 |
| 1665 | 1660.2 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1587.5 | 1580.2 | 2023 Etienne Lewis Closed Tournament (U14) | 5 | 2023-08-27 | S | B | 0 | 0.55 | -0.55 | -10.3 | 0.55 | -0.55 | -11 |
| 1565.2 | 1550.4 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1495.8 | 1480.8 | 2023 South African Junior Closed Chess Championships (U12 Open) | 4 | 2023-04-01 | S | B | 0 | 0.54 | -0.54 | -10.8 | 0.54 | -0.54 | -10.8 |
| 1512.7 | 1491.9 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1393.8 | 1419 | 2022 Etienne Lewis (U12 Open) | 6 | 2022-09-04 | S | W | 1 | 0.68 | 0.32 | 6 | 0.63 | 0.37 | 7.4 |
| 1404.4 | 1394.7 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1304.9 | 1294.9 | 2019 Etienne Lewis Trials (U10 Boys) | 6 | 2019-09-01 | S | W | 0 | 0.66 | -0.66 | -13.2 | 0.66 | -0.66 | -13.2 |
| 1358.5 | 1338.6 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1423.9 | 1410.2 | 2019 South African Junior Closed Chess Championship (U8 Open) | 4 | 2019-03-18 | S | B | 1 | 0.38 | 0.62 | 12.4 | 0.37 | 0.63 | 12.6 |
| 1095.3 | 1091.2 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1107.1 | 1084.6 | 2018 Etienne Lewis Trials (U8 Boys) | 4 | 2018-09-01 | S | B | 0 | 0.44 | -0.44 | -8.8 | 0.47 | -0.47 | -9.4 |
