| 1649.9 | 1686.2 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 2155.1 | 2167.4 | Gauteng Inter-Region at Emerald Resort 2025 (U20) | 4 | 2025-12-07 | S | B | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1655.7 | 1697.8 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1932.3 | 1939.9 | 2024 Midstream College Open Chess Tournament (A) | 2 | 2024-07-20 | S | B | 0.5 | 0.14 | 0.36 | 6 | 0.18 | 0.32 | 6.4 |
| 1631.3 | 1674 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1727.9 | 1732.8 | 2024 Centurion Club Closed Chess Tournament (A) | 2 | 2024-05-25 | S | B | 0 | 0.35 | -0.35 | -5.8 | 0.39 | -0.39 | -7.8 |
| 1718 | 1749.8 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1695.2 | 1711.7 | 2023 Centurion Chess Open (A) | 1 | 2023-09-23 | S | B | 1 | 0.48 | 0.52 | 8.6 | 0.5 | 0.5 | 10 |
| 1728 | 1389.2 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1718.9 | 1596.4 | Tshwane Chess FIDE Rated Blitz League 3 2023 | 5 | 2023-07-16 | B | B | 0 | 0.47 | -0.47 | -1.7 | 0.22 | -0.22 | -4.4 |
| 1600.2 | 1661.4 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1692.7 | 1704.5 | Silver Lakes Open Chess Tournament (A) | 1 | 2023-04-15 | S | W | 0.5 | 0.43 | 0.07 | 1.2 | 0.49 | 0.01 | 0.2 |
| 1532.1 | 1550.6 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1689 | 1708.4 | 2023 Tshwane Chess Open Registration Tournament (A) | 5 | 2023-01-28 | S | W | 0.5 | 0.36 | 0.14 | 2.3 | 0.36 | 0.14 | 2.8 |
| 1552.4 | 1391.7 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1703.6 | 1567.5 | 2022 Centurion Club Blitz | 3 | 2022-11-30 | B | B | 0 | 0.28 | -0.28 | -1 | 0.25 | -0.25 | -5 |
| 1550.1 | 1543.6 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1674.5 | 1673.1 | 2022 Wynie Robbertse Open (A) | 5 | 2022-10-08 | S | W | 0 | 0.4 | -0.4 | -6.6 | 0.39 | -0.39 | -7.8 |
| 1560.2 | 1542.5 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1689.7 | 1681.5 | 2022 Blou Bul Open (A) | 4 | 2022-06-26 | S | W | 0.5 | 0.39 | 0.11 | 2.1 | 0.38 | 0.12 | 2.4 |
| 1560.2 | 1542.5 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1689.7 | 1681.5 | 2022 Centurion Club Championships | 2 | 2022-05-18 | S | W | 1 | 0.39 | 0.61 | 10.1 | 0.38 | 0.62 | 12.4 |
| 1578.8 | 870 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1546.2 | 1127.2 | 2021 CCC Inhouse Blitz (A) | 4 | 2021-11-24 | B | B | 0 | 0.5 | -0.5 | -1.8 | 0.16 | -0.16 | -3.2 |
| 1578.8 | 1569.3 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1546.2 | 1541.1 | 2021 CCC Inhouse (A) | 2 | 2021-10-27 | S | W | 0.5 | 0.58 | -0.08 | -1.3 | 0.57 | -0.07 | -1.4 |
| 1627.7 | 1621.9 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1507.5 | 1504.9 | 2021 Gauteng North Open Tournament (A) | 2 | 2021-08-28 | S | W | 0.5 | 0.68 | -0.18 | -3.4 | 0.68 | -0.18 | -3.6 |
| 1293.1 | 1287.4 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1399 | 1408.6 | 2019 TuksChess Open (B) | 3 | 2019-02-23 | S | B | 0.5 | 0.33 | 0.17 | 2.8 | 0.32 | 0.18 | 3.6 |
| 1056.4 | 1058.7 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1141.8 | 1144.4 | 2018 Alekhine Open (C) | 4 | 2018-08-10 | S | B | 0.5 | 0.36 | 0.14 | 2.6 | 0.36 | 0.14 | 2.8 |
| 594 | 594 | 20 | 20 | Jacobs, Cn (Calvin Nicholas) | | GTP | 736 | 736 | 2017 Jacaranda Open (D) | 2 | 2017-10-14 | S | B | 0.5 | 0.31 | 0.19 | 3.2 | 0.19 | 0.31 | 6.2 |
