| 1336.3 | 1338.8 | 20 | 20 | Van Zyl, J (Johanna) | | NCP | 1256.7 | 1254.9 | De Aar Open Chess Tournament 2026 (B) | 4 | 2026-01-31 | S | B | 0.5 | 0.55 | -0.05 | -0.8 | 0.56 | -0.06 | -1.2 |
| 1336.3 | 1338.8 | 20 | 20 | Van Zyl, J (Johanna) | | NCP | 1256.7 | 1254.9 | Hopetown Chess Tournament 2026 (U12) | 4 | 2026-02-07 | S | B | 0.5 | 0.55 | -0.05 | -0.8 | 0.56 | -0.06 | -1.2 |
| 1359.7 | 1370.3 | 20 | 20 | Van Zyl, J (Johanna) | | NCP | 1273.9 | 1274.4 | 2025 Mzansi Inter Provincial Team Championships (U12 Combined) | 4 | 2025-12-16 | S | B | 1 | 0.56 | 0.44 | 7.3 | 0.57 | 0.43 | 8.6 |
| 1287.4 | 1292.2 | 20 | 20 | Van Zyl, J (Johanna) | | NCP | 1248.5 | 1244.5 | De Aar Primary School 2025 (U12) | 4 | 2025-08-16 | S | B | 1 | 0.5 | 0.5 | 8.4 | 0.51 | 0.49 | 9.8 |
| 1287.4 | 1292.2 | 20 | 20 | Van Zyl, J (Johanna) | | NCP | 1248.5 | 1244.5 | Hopetown Schools Open 2025 (U11) | 4 | 2025-08-01 | S | W | 0.5 | 0.59 | -0.09 | -1.5 | 0.6 | -0.1 | -2 |
| 1222.7 | 1226.8 | 20 | 20 | Van Zyl, J (Johanna) | | NCP | 1132 | 1131.3 | 2025 HSDA School Chess Tournament (U9+U11) | 5 | 2025-02-08 | S | B | 1 | 0.56 | 0.44 | 7.4 | 0.57 | 0.43 | 8.6 |
| 1253.6 | 1260.3 | 20 | 20 | Van Zyl, J (Johanna) | | NCP | 1156.3 | 1151.7 | 2024 Kimberley Chess Club Christmas Open (Bishops) | 1 | 2024-12-07 | S | W | 1 | 0.66 | 0.34 | 5.7 | 0.67 | 0.33 | 6.6 |
| 1193.3 | 1193 | 20 | 20 | Van Zyl, J (Johanna) | | NCP | 1065.7 | 1054.4 | Hopetown Schools Chess Tournament 2024 (U11) | 5 | 2024-08-17 | S | B | 0.5 | 0.61 | -0.11 | -1.8 | 0.62 | -0.12 | -2.4 |
| 1193.3 | 1193 | 20 | 20 | Van Zyl, J (Johanna) | | NCP | 1065.7 | 1054.4 | 2024 Pixley Ka Seme Chess Schools Open 2 (U11) | 5 | 2024-08-03 | S | B | 1 | 0.61 | 0.39 | 6.6 | 0.62 | 0.38 | 7.6 |
| 1097.5 | 1090 | 20 | 20 | Van Zyl, J (Johanna) | | NCP | 1101.7 | 1095.6 | 2024 HSDA Open 3 (U11) | 5 | 2024-07-27 | S | W | 1 | 0.54 | 0.46 | 7.7 | 0.54 | 0.46 | 9.2 |
| 1097.5 | 1090 | 20 | 20 | Van Zyl, J (Johanna) | | NCJ | 1101.7 | 1095.6 | 2024 Frances Baard Grand Prix 2.0 (B) | 3 | 2024-07-06 | S | W | 1 | 0.54 | 0.46 | 7.7 | 0.54 | 0.46 | 9.2 |
| 1091.1 | 1080.3 | 20 | 20 | Van Zyl, J (Johanna) | | NCJ | 1139.3 | 1142 | Frances Baard Grand Prix 1.0 2024 (U12) | 3 | 2024-06-29 | S | W | 1 | 0.49 | 0.51 | 8.6 | 0.47 | 0.53 | 10.6 |
| 1200 | 1200 | 20 | 20 | Van Zyl, J (Johanna) | | NCJ | 1200 | 1200 | Pixley Chess Trials 2022 (U10) | 5 | 2022-09-03 | S | W | 1 | 0.54 | 0.46 | 7.7 | 0.54 | 0.46 | 9.2 |
