| 2257.7 | 1583 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1963.2 | 1873.9 | South African Open 2025 (Blitz) | 4 | 2025-07-02 | B | B | 1 | 0.8 | 0.2 | 0.7 | 0.12 | 0.88 | 17.6 |
| 1625.4 | 1642.5 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1507.5 | 1504.9 | 2021 Gauteng North Open Tournament (A) | 4 | 2021-08-29 | S | B | 1 | 0.6 | 0.4 | 7.5 | 0.62 | 0.38 | 7.6 |
| 1586.7 | 1624.3 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1504.3 | 1497.6 | 2021 Blou Bul Tournament (A) | 3 | 2021-04-10 | S | B | 0 | 0.55 | -0.55 | -9.1 | 0.61 | -0.61 | -12.2 |
| 1279.4 | 1270.6 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1352.8 | 1347.2 | 2019 South African Junior Closed Chess Championship (U10 Open) | 8 | 2019-03-21 | S | B | 1 | 0.37 | 0.63 | 12.6 | 0.37 | 0.63 | 12.6 |
