| 1805.3 | 1793.8 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1577.5 | 1577.5 | 2023 South African Junior Closed Chess Championships (U18 Open) | 7 | 2023-04-03 | S | W | 1 | 0.81 | 0.19 | 3.8 | 0.79 | 0.21 | 4.2 |
| 1685.8 | 1661.3 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1547.5 | 1542.7 | 2nd Master Vikings 2023 | 2 | 2023-02-23 | S | B | 1 | 0.62 | 0.38 | 6.3 | 0.6 | 0.4 | 8 |
| 1530.4 | 1534.5 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1485 | 1473.6 | Big Buffalo Swiss Open and Junior Closed 2021 | 1 | 2021-09-11 | S | W | 1 | 0.59 | 0.41 | 6.9 | 0.61 | 0.39 | 7.8 |
| 1509.1 | 1516.3 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1498.9 | 1483.2 | BC Trials 1 2020 (U16A) | 3 | 2020-02-22 | S | W | 1 | 0.55 | 0.45 | 7.5 | 0.58 | 0.42 | 8.4 |
| 1443.1 | 1459.7 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1342.4 | 1332.2 | Vikings League 4 of 6 2019 (A) | 5 | 2019-09-14 | S | W | 1 | 0.66 | 0.34 | 5.6 | 0.69 | 0.31 | 6.2 |
| 1449.7 | 1472.5 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1348.4 | 1329.3 | Vikings League 3 of 6 2019 (A) | 2 | 2019-08-24 | S | B | 0.5 | 0.58 | -0.08 | -1.3 | 0.62 | -0.12 | -2.4 |
| 1525.9 | 1523.4 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1318.6 | 1316.7 | Buffalo City Trials 4 of 5 2019 (U16A) | 5 | 2019-04-06 | S | B | 1 | 0.7 | 0.3 | 5 | 0.7 | 0.3 | 6 |
| 1188.9 | 1205.4 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1102.7 | 1109.2 | 4th Buffalo Trials 2018 (U14A) | 5 | 2018-05-05 | S | B | 1 | 0.56 | 0.44 | 7.3 | 0.57 | 0.43 | 8.6 |
| 1140.8 | 1151.8 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1053.9 | 1077.6 | 2nd Buffalo Trials 2018 (U14A) | 4 | 2018-03-17 | S | W | 1 | 0.64 | 0.36 | 6 | 0.63 | 0.37 | 7.4 |
| 1086 | 1086 | 20 | 20 | Chang, S (Sebastian) | | EBC | 750 | 750 | 5Th Buffalo League 2017 (Division 1) | 1 | 2017-10-14 | S | W | 1 | 0.88 | 0.12 | 2 | 0.12 | 0.88 | 17.6 |
| 782 | 782 | 20 | 20 | Chang, S (Sebastian) | | EBC | 666 | 666 | 2Nd Buffalo City Chess Trials 2016 (U12) | 5 | 1900-01-01 | S | B | 0 | 0.66 | -0.66 | -11 | -0.66 | 0.66 | 13.2 |
