| 1556.5 | 1551.4 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1459.2 | 1450.9 | 2024 Chess Unlimited Invitational (Section 3) | 4 | 2024-07-06 | S | B | 1 | 0.57 | 0.43 | 7.2 | 0.58 | 0.42 | 8.4 |
| 1538.2 | 1533.7 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1436.1 | 1430.8 | White River Primary 2023 (U20) | 4 | 2023-07-21 | S | B | 1 | 0.58 | 0.42 | 7.1 | 0.58 | 0.42 | 8.4 |
| 1516.2 | 1513.7 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1415.7 | 1406.2 | Robbies 2023 (U20) | 5 | 2023-05-11 | S | W | 0 | 0.66 | -0.66 | -11.1 | 0.67 | -0.67 | -13.4 |
| 1462.6 | 1466.5 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1477.8 | 1481.1 | Uplands Chess Tournament 2023 (U20) | 5 | 2023-02-25 | S | B | 1 | 0.44 | 0.56 | 9.4 | 0.44 | 0.56 | 11.2 |
| 1486.5 | 1503.6 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1463.3 | 1462.5 | White River Primary 2022 (U20) | 5 | 2022-07-30 | S | W | 0 | 0.57 | -0.57 | -9.6 | 0.59 | -0.59 | -11.8 |
| 1440 | 1451.2 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1480.2 | 1483 | Uplands Chess Tournament 2022 (U18) | 5 | 2022-02-26 | S | B | 1 | 0.41 | 0.59 | 9.9 | 0.42 | 0.58 | 11.6 |
| 1389.8 | 1391.4 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1469.3 | 1470.5 | Chess Unlimited 1 2021 (U16) | 1 | 2021-10-23 | S | W | 1 | 0.45 | 0.55 | 9.1 | 0.45 | 0.55 | 11 |
| 1415.2 | 1412 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1369.9 | 1371.5 | De Goede Top 10 2019 (U14) | 4 | 2019-07-03 | S | W | 0.5 | 0.59 | -0.09 | -1.5 | 0.59 | -0.09 | -1.8 |
| 1415.2 | 1412 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1369.9 | 1371.5 | Barberton Primary 2019 (U14) | 4 | 2019-07-27 | S | B | 1 | 0.51 | 0.49 | 8.2 | 0.51 | 0.49 | 9.8 |
| 1312 | 1310.7 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1263.7 | 1261.7 | Rob Ferreira 2019 (A) | 3 | 2019-04-06 | S | B | 0.5 | 0.51 | -0.01 | -0.2 | 0.52 | -0.02 | -0.4 |
| 1207.8 | 1220.7 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1242.2 | 1249.8 | Nelpsruit Prestige 2018 (C) | 2 | 2018-09-14 | S | W | 0.5 | 0.5 | 0 | 0 | 0.51 | -0.01 | -0.2 |
| 1052.4 | 1052.4 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1092.7 | 1096.2 | Curro Age Open 2018 (U14 Open) | 5 | 2018-05-12 | S | B | 0 | 0.41 | -0.41 | -6.9 | 0.41 | -0.41 | -8.2 |
| 915.3 | 940.6 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1079.5 | 1083.3 | Penryn Age Open 2018 (U14 Boys) | 3 | 2018-04-21 | S | B | 1 | 0.27 | 0.73 | 12.3 | 0.29 | 0.71 | 14.2 |
| 737 | 737 | 20 | 20 | Van Heerden, J (Joshua) | | MEN | 1046 | 1046 | Nelspruit Prestige Tournament (U10) | 7 | 2015-08-29 | S | W | 0 | 0.14 | -0.14 | -2.3 | -0.14 | 0.14 | 2.8 |
