| 1465.2 | 1455.6 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1696.2 | 1713.7 | Laerskool Constantiapark Open Chess Tournament 2023 (Open) | 5 | 2023-02-18 | S | W | 0 | 0.27 | -0.27 | -4.5 | 0.24 | -0.24 | -4.8 |
| 1329.2 | 1307.7 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1661.9 | 1659.9 | 2022 Etienne Lewis (U14 Open) | 3 | 2022-09-03 | S | W | 0 | 0.15 | -0.15 | -2.8 | 0.13 | -0.13 | -2.6 |
| 1344.5 | 1333.9 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1488.8 | 1487.7 | 2019 Etienne Lewis Trials (U12 Boys) | 6 | 2019-09-01 | S | W | 0 | 0.37 | -0.37 | -7.4 | 0.36 | -0.36 | -7.2 |
| 1039.6 | 1026.2 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1176.7 | 1172.2 | 2018 Etienne Lewis Trials (U10 Boys) | 5 | 2018-09-01 | S | W | 0 | 0.38 | -0.38 | -7.6 | 0.37 | -0.37 | -7.4 |
