| 1711.5 | 1721.8 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1804.8 | 1797.2 | 2025 Blou Bul Open Chess Tournament (A) | 5 | 2025-02-08 | S | B | 0 | 0.35 | -0.35 | -5.8 | 0.37 | -0.37 | -7.4 |
| 1604.3 | 1626.7 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1550.1 | 1550.3 | 2024 Etienne Lewis (U14) | 4 | 2024-08-31 | S | B | 1 | 0.52 | 0.48 | 9 | 0.55 | 0.45 | 9 |
| 1486.1 | 1479.7 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1569.9 | 1558.5 | 2024 Tshwane Chess OPEN Registration Tournament (B) | 4 | 2024-01-27 | S | W | 0 | 0.44 | -0.44 | -7.3 | 0.45 | -0.45 | -9 |
| 1506.1 | 1509.5 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1587.3 | 1578.3 | 2023 Alekhine Open Tournament (B) | 2 | 2023-09-09 | S | D | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1482 | 1478.1 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1587.5 | 1580.2 | 2023 Etienne Lewis Closed Tournament (U14) | 4 | 2023-08-26 | S | W | 0 | 0.42 | -0.42 | -7.9 | 0.42 | -0.42 | -8.4 |
| 1419.6 | 1410.9 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1495.8 | 1480.8 | 2023 South African Junior Closed Chess Championships (U12 Open) | 6 | 2023-04-02 | S | B | 1 | 0.37 | 0.63 | 12.6 | 0.38 | 0.62 | 12.4 |
| 1424.8 | 1426.5 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1335.3 | 1320.9 | South African Junior Closed Chess Championships 2022 (U12 Open) | 10 | 2022-04-01 | S | B | 0 | 0.56 | -0.56 | -11.2 | 0.58 | -0.58 | -11.6 |
| 1346.8 | 1346.7 | 20 | 20 | Slabbert, ZN (Zander Nicolaas) | | GTP | 1107.1 | 1084.6 | 2018 Etienne Lewis Trials (U8 Boys) | 3 | 2018-09-01 | S | W | 1 | 0.82 | 0.18 | 3.6 | 0.85 | 0.15 | 3 |
