| 1916.5 | 1945.8 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1961.6 | 1966.5 | 2025 KSNG Open (A) | 3 | 2025-02-22 | S | B | 0 | 0.41 | -0.41 | -6.8 | 0.43 | -0.43 | -8.6 |
| 1916.5 | 1945.8 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1961.6 | 1966.5 | 2025 Piet Robbertse Fide Rated Open Chess Tournament (A) | 3 | 2025-02-01 | S | B | 0 | 0.41 | -0.41 | -7.7 | 0.43 | -0.43 | -8.6 |
| 1896.3 | 1913.9 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1718.9 | 1746.1 | Bojanala's FIDE in the Sparkling Waters 2023 (Prestige) | 5 | 2023-07-30 | S | W | 0.5 | 0.75 | -0.25 | -5 | 0.74 | -0.24 | -4.8 |
| 1862.9 | 1870 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1674.5 | 1673.1 | 2022 Wynie Robbertse Open (A) | 2 | 2022-10-08 | S | B | 1 | 0.68 | 0.32 | 5.3 | 0.69 | 0.31 | 6.2 |
| 1798 | 1807.4 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1549.2 | 1547 | 2022 Tshwane Chess Open Registration Tournament (A) | 1 | 2022-01-29 | S | W | 1 | 0.83 | 0.17 | 2.8 | 0.84 | 0.16 | 3.2 |
| 1696 | 1694.5 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1493.2 | 1559.4 | 2019 Alekhine Open (A) | 3 | 2019-08-09 | S | W | 1 | 0.78 | 0.22 | 4.4 | 0.7 | 0.3 | 6 |
