| 1564.9 | 1575.9 | 20 | 20 | Claassen, J (Jean-Daniel) | | GTP | 1583.2 | 1584.6 | 2019 South African Junior Closed Chess Championship (U16 Open) | 5 | 2019-03-19 | S | W | 1 | 0.52 | 0.48 | 9.6 | 0.53 | 0.47 | 9.4 |
| 1542 | 1550.3 | 20 | 20 | Claassen, J (Jean-Daniel) | | GTP | 1445.2 | 1445.7 | 2018 Etienne Lewis Trials (U16 Boys) | 7 | 2018-09-02 | S | W | 0 | 0.65 | -0.65 | -13 | 0.66 | -0.66 | -13.2 |
| 1507.2 | 1504.5 | 20 | 20 | Claassen, J (Jean-Daniel) | | GTP | 1392.7 | 1385.5 | 2018 South African Junior Closed Chess Championships (U16 Open) | 5 | 2018-04-03 | S | B | 1 | 0.59 | 0.41 | 8.2 | 0.6 | 0.4 | 8 |
| 1386 | 1386 | 20 | 20 | Claassen, J (Jean-Daniel) | | GTP | 1418 | 1418 | 2017 Tshwane Chess Etienne Lewis (U16 Boys) | 3 | 2017-09-01 | S | W | 1 | 0.46 | 0.54 | 10.8 | 0.54 | 0.46 | 9.2 |
| 1361 | 1361 | 20 | 20 | Claassen, J (Jean-Daniel) | | GTP | 1375 | 1375 | 2017 Pss Capablanca (Rr F) | 5 | 2017-04-29 | S | W | 0 | 0.48 | -0.48 | -9.6 | -0.48 | 0.48 | 9.6 |
| 1182 | 1182 | 20 | 20 | Claassen, J (Jean-Daniel) | | GTP | 1248 | 1248 | Gauteng Chess League 2015 (Fourth Division) | 3 | 2015-10-03 | S | B | 1 | 0.41 | 0.59 | 11.1 | 0.59 | 0.41 | 8.2 |
