| 1625.9 | 1625.1 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1701.3 | 1721.2 | 2023 Etienne Lewis Closed Tournament (U16) | 7 | 2023-08-27 | S | W | 0.5 | 0.45 | 0.05 | 0.9 | 0.43 | 0.07 | 1.4 |
| 1410.6 | 1403 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1489.3 | 1485.3 | 2021 Etienne Lewis Closed Trials (U14 Open) | 5 | 2021-09-25 | S | B | 0 | 0.37 | -0.37 | -7 | 0.36 | -0.36 | -7.2 |
| 1414.3 | 1404.3 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1493.2 | 1559.4 | 2019 Jacaranda Round Robin (D) | 5 | 2019-08-03 | S | B | 0.5 | 0.37 | 0.13 | 2.2 | 0.28 | 0.22 | 4.4 |
| 1339.9 | 1329.3 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1386.5 | 1383 | 2019 Lubowski Open Tournament (B) | 4 | 2019-05-12 | S | W | 0 | 0.49 | -0.49 | -9.2 | 0.48 | -0.48 | -9.6 |
| 1278.2 | 1258.3 | 20 | 20 | Jacobs, CN (Calvin Nicholas) | | GTP | 1352.8 | 1347.2 | 2019 South African Junior Closed Chess Championship (U10 Open) | 7 | 2019-03-21 | S | W | 0.5 | 0.45 | 0.05 | 1 | 0.44 | 0.06 | 1.2 |
