| 1578.5 | 1571.7 | 20 | 20 | Chang, S (Samuel) | | EBC | 1560.9 | 1566.3 | Mzansi Interprovincial Youth Chess Championships 2024 (U16 Open Championship) | 6 | 2024-12-18 | S | W | 0.5 | 0.56 | -0.06 | -1.2 | 0.55 | -0.05 | -1 |
| 1578.5 | 1571.7 | 20 | 20 | Chang, S (Samuel) | | EBC | 1560.9 | 1566.3 | EL Junior Closed 2024 (U16) | 3 | 2024-11-23 | S | W | 0.5 | 0.56 | -0.06 | -1 | 0.55 | -0.05 | -1 |
| 1561.2 | 1560.3 | 20 | 20 | Chang, S (Samuel) | | EBC | 1481.8 | 1471.3 | 2023 EC Schools Provincial Winter Games (U15 Boys) | 5 | 2023-06-03 | S | W | 1 | 0.63 | 0.37 | 6.1 | 0.65 | 0.35 | 7 |
| 1477.1 | 1472.2 | 20 | 20 | Chang, S (Samuel) | | EBC | 1457.6 | 1433.9 | 2023 BCM Schools Winter Games District Championships (U15 Boys) | 5 | 2023-05-20 | S | B | 0.5 | 0.48 | 0.02 | 0.3 | 0.5 | 0 | 0 |
| 1529.2 | 1527.8 | 20 | 20 | Chang, S (Samuel) | | EBC | 1494 | 1473.6 | 2023 South African Junior Closed Chess Championships (U14 Open) | 4 | 2023-04-01 | S | W | 0 | 0.58 | -0.58 | -11.6 | 0.6 | -0.6 | -12 |
| 1412.2 | 1409.1 | 20 | 20 | Chang, S (Samuel) | | EBC | 1443.7 | 1428.5 | 2022 South African Junior Wild Card Chess Championships (U14 Open) | 6 | 2022-12-11 | S | B | 0 | 0.42 | -0.42 | -8.4 | 0.44 | -0.44 | -8.8 |
| 1340.6 | 1330.3 | 20 | 20 | Chang, S (Samuel) | | EBC | 1344.3 | 1347.4 | 2021 Eastern Cape Schools Provincial Summer Championships (Boys) | 4 | 2021-10-16 | S | W | 1 | 0.54 | 0.46 | 7.6 | 0.52 | 0.48 | 9.6 |
| 1340 | 1321.7 | 20 | 20 | Chang, S (Samuel) | | EBC | 1335 | 1337 | Young Buffalos Closed 2021 (A) | 2 | 2021-09-11 | S | B | 0 | 0.46 | -0.46 | -7.6 | 0.44 | -0.44 | -8.8 |
| 1282.2 | 1305.2 | 20 | 20 | Chang, S (Samuel) | | EBC | 1266.2 | 1278 | Vikings League 4 of 6 2019 (B) | 2 | 2019-09-14 | S | W | 0 | 0.56 | -0.56 | -9.3 | 0.57 | -0.57 | -11.4 |
