| 1603.8 | 1593.9 | 20 | 20 | Janse Van Rensburg, J (Josh) | | GTP | 1605.2 | 1599.1 | 2025 Tshwane South School District CLOSED League Championship (U11A) | 3 | 2025-08-15 | S | B | 0 | 0.46 | -0.46 | -7.6 | 0.45 | -0.45 | -9 |
| 1603.8 | 1593.9 | 20 | 20 | Janse Van Rensburg, J (Josh) | | GTP | 1605.2 | 1599.1 | 2025 Etienne Lewis Closed Chess Tournament (U12) | 7 | 2025-08-10 | S | B | 1 | 0.46 | 0.54 | 10.2 | 0.45 | 0.55 | 11 |
| 1450.1 | 1444.6 | 20 | 20 | Janse Van Rensburg, J (Josh) | | GTP | 1390.5 | 1386.9 | Menlopark Open Chess Tournament 2024 (U12) | 5 | 2024-07-13 | S | W | 0.5 | 0.61 | -0.11 | -1.8 | 0.61 | -0.11 | -2.2 |
| 1370.5 | 1347.3 | 20 | 20 | Janse Van Rensburg, J (Josh) | | GTP | 1399.1 | 1384.2 | South African Junior Closed Chess Championship 2024 (U10 Open) | 5 | 2024-04-29 | S | B | 1 | 0.42 | 0.58 | 11.6 | 0.42 | 0.58 | 11.6 |
| 1340.7 | 1336.4 | 20 | 20 | Janse Van Rensburg, J (Josh) | | GTP | 1354.8 | 1354.8 | 2023 Etienne Lewis Closed Tournament (U10) | 6 | 2023-08-27 | S | B | 1 | 0.44 | 0.56 | 10.5 | 0.44 | 0.56 | 11.2 |
| 1428 | 1427.5 | 20 | 20 | Janse Van Rensburg, J (Josh) | | GTP | 1336.2 | 1336.2 | Tuks Junior Developmental Tournament 2022 (Yellow) | 3 | 2022-08-06 | S | B | 1 | 0.57 | 0.43 | 7.1 | 0.56 | 0.44 | 8.8 |
