| 1856.1 | 1374.6 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 2155.1 | 1924.5 | Centurion Chess Club Year End Blitz 2025 | 7 | 2025-12-03 | B | W | 0 | 0.19 | -0.19 | -0.7 | 0.01 | -0.01 | -0.2 |
| 1764.4 | 1767.7 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1978.3 | 1987.9 | 2025 Tshwane Chess OPEN Registration Tournament (A2) | 2 | 2025-01-25 | S | W | 0 | 0.29 | -0.29 | -4.8 | 0.29 | -0.29 | -5.8 |
| 1736.2 | 1232.8 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1970.6 | 1851.3 | CCC Blitz 2024 | 5 | 2024-12-04 | B | B | 0.5 | 0.19 | 0.31 | 1.1 | 0 | 0.5 | 10 |
| 1752.2 | 1754.3 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1914.1 | 1929.8 | Centurion Chess Open Tournament 2024 (A) | 3 | 2024-09-21 | S | B | 0 | 0.27 | -0.27 | -4.5 | 0.25 | -0.25 | -5 |
| 1748.5 | 1750.4 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1946.7 | 1960.3 | 2024 Johannes Mabusela's 40th Birthday Chess Tournament F Section (A) | 3 | 2024-06-01 | S | B | 0.5 | 0.23 | 0.27 | 4.5 | 0.21 | 0.29 | 5.8 |
| 1446.5 | 1180.2 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1677.2 | 1605.4 | CCC Blitz All 2023 | 4 | 2023-12-06 | B | W | 0 | 0.27 | -0.27 | -1 | 0.05 | -0.05 | -1 |
