| 1855.3 | 1858.3 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1719.8 | 1717.1 | 2025 Gauteng Schools Provincial Individual Chess Championship (U15 Boys) | 5 | 2025-09-27 | S | B | 1 | 0.62 | 0.38 | 6.3 | 0.62 | 0.38 | 7.6 |
| 1783 | 1786.4 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1766.4 | 1767.3 | Tshwane Chess Club Clash 2025 (Prestige) | 2 | 2025-09-13 | S | B | 1 | 0.48 | 0.52 | 8.6 | 0.48 | 0.52 | 10.4 |
| 1749 | 1745.3 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1714.7 | 1712.6 | 2025 Etienne Lewis Closed Chess Tournament (U16) | 7 | 2025-08-10 | S | B | 0 | 0.5 | -0.5 | -9.4 | 0.5 | -0.5 | -10 |
| 1716.3 | 1714.2 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1804.8 | 1797.2 | 2025 Blou Bul Open Chess Tournament (A) | 3 | 2025-02-08 | S | B | 0 | 0.36 | -0.36 | -6 | 0.36 | -0.36 | -7.2 |
| 1594.2 | 1589.1 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1532.9 | 1517 | 2024 Silver Lakes Open Chess Tournament (B) | 1 | 2024-04-20 | S | B | 1 | 0.53 | 0.47 | 7.8 | 0.54 | 0.46 | 9.2 |
| 1458 | 1456.6 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1587.5 | 1580.2 | 2023 Etienne Lewis Closed Tournament (U14) | 3 | 2023-08-26 | S | B | 0.5 | 0.31 | 0.19 | 3.6 | 0.31 | 0.19 | 3.8 |
