| 1409 | 1409.5 | 20 | 20 | Steyn, K (Kian) | JM | GJM | 1680.9 | 1678.6 | 2025 Wynie Robbertse Chess Tournament (U10) | 2 | 2025-07-19 | S | B | 0 | 0.14 | -0.14 | -2.3 | 0.15 | -0.15 | -3 |
| 1371.6 | 1358.9 | 20 | 20 | Steyn, K (Kian) | JM | GJM | 1645.1 | 1632 | West Rand Open 2.0 2025 (U10) | 3 | 2025-06-07 | S | B | 0 | 0.14 | -0.14 | -2.3 | 0.14 | -0.14 | -2.8 |
| 1360.2 | 1357.9 | 20 | 20 | Steyn, K (Kian) | JM | GJM | 1613.2 | 1602.1 | FIDE in The West 2025 (U10) | 4 | 2025-04-12 | S | W | 0 | 0.25 | -0.25 | -4.1 | 0.26 | -0.26 | -5.2 |
| 1361.2 | 1357 | 20 | 20 | Steyn, K (Kian) | | GJM | 1621.1 | 1611.9 | 2025 West Rand Open (U10) | 4 | 2025-02-08 | S | B | 0 | 0.16 | -0.16 | -2.7 | 0.16 | -0.16 | -3.2 |
| 1398.4 | 1381.2 | 20 | 20 | Steyn, K (Kian) | | GJM | 1606.7 | 1599.6 | 2024 West Rand Trials (U10) | 3 | 2024-09-07 | S | B | 0 | 0.22 | -0.22 | -3.7 | 0.2 | -0.2 | -4 |
| 1447 | 1439.4 | 20 | 20 | Steyn, K (Kian) | | GJM | 1575.3 | 1558.4 | Fourth Knight Riders Juniors Open Chess Tournament 204 (D) | 4 | 2024-08-03 | S | B | 0 | 0.31 | -0.31 | -5.1 | 0.32 | -0.32 | -6.4 |
| 1366.8 | 1359.3 | 20 | 20 | Steyn, K (Kian) | | GJM | 1639.4 | 1636.8 | Ekurhuleni Trails 2 2024 (U8+U10) | 3 | 2024-07-27 | S | B | 0 | 0.14 | -0.14 | -2.3 | 0.14 | -0.14 | -2.8 |
| 1270.5 | 1261.8 | 20 | 20 | Steyn, K (Kian) | | GJM | 1567.1 | 1555.1 | FIDE in the West 2024 (U10) | 1 | 2024-06-08 | S | B | 0 | 0.11 | -0.11 | -1.8 | 0.12 | -0.12 | -2.4 |
| 1270.5 | 1261.8 | 20 | 20 | Steyn, K (Kian) | | GJM | 1567.1 | 1555.1 | JMC Trinityhouse Little Falls 2024 (U10) | 2 | 2024-06-02 | S | B | 0 | 0.11 | -0.11 | -1.8 | 0.12 | -0.12 | -2.4 |
| 1241.4 | 1230.3 | 20 | 20 | Steyn, K (Kian) | | GJM | 1459.9 | 1464 | JMC Crawford International Sandton 2024 (U10) | 5 | 2024-05-11 | S | B | 0 | 0.2 | -0.2 | -3.3 | 0.19 | -0.19 | -3.8 |
| 1318.1 | 1200 | 20 | 20 | Steyn, K (Kian) | | GJM | 1588.9 | 1200 | Mzansi Spring Rapid 2023 | 7 | 2023-09-02 | R | D | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1196.7 | 1194.2 | 20 | 20 | Steyn, K (Kian) | | GJM | 1432.1 | 1469.3 | 2023 Woman's Day Open Chess Tournament (Pawn) | 4 | 2023-08-09 | S | W | 0 | 0.27 | -0.27 | -4.5 | 0.22 | -0.22 | -4.4 |
| 1196.7 | 1194.2 | 20 | 20 | Steyn, K (Kian) | | GJM | 1432.1 | 1469.3 | Chess Power House 2023 (D) | 5 | 2023-08-19 | S | W | 0 | 0.27 | -0.27 | -5.1 | 0.22 | -0.22 | -4.4 |
| 1226.3 | 1230.6 | 20 | 20 | Steyn, K (Kian) | | GJM | 1319.2 | 1342.2 | 2023 Menlo Open Tournament (F) | 4 | 2023-07-22 | S | W | 0 | 0.43 | -0.43 | -7.1 | 0.41 | -0.41 | -8.2 |
