| 1654.7 | 1630.7 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1549.1 | 1543.3 | 3rd Vikings Champs 2023 (Prestige) | 2 | 2023-03-25 | S | W | 1 | 0.66 | 0.34 | 5.6 | 0.64 | 0.36 | 7.2 |
| 1683.3 | 1662.6 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1547.5 | 1542.7 | Grey College Team Championship 2023 (A) | 3 | 2023-02-03 | S | W | 0.5 | 0.7 | -0.2 | -3.3 | 0.68 | -0.18 | -3.6 |
| 1529.1 | 1538.3 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1466.1 | 1457.6 | South African Junior Closed Chess Championships 2022 (U16 Open) | 4 | 2022-03-29 | S | B | 1 | 0.53 | 0.47 | 9.4 | 0.55 | 0.45 | 9 |
| 1576.9 | 1595.6 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1485 | 1473.6 | Big Buffalo Swiss Open and Junior Closed 2021 | 5 | 2021-09-11 | S | W | 1 | 0.65 | 0.35 | 5.9 | 0.68 | 0.32 | 6.4 |
| 1306.4 | 1320.8 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1225.1 | 1217.7 | Border Vikings vs South Park 2018 (B) | 6 | 2018-09-08 | S | B | 1 | 0.55 | 0.45 | 8.5 | 0.58 | 0.42 | 8.4 |
| 1268.2 | 1274.4 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1270.2 | 1268.1 | Buffalo City Closed Stage 1 2018 (Boys Group 1) | 1 | 2018-08-11 | S | B | 1 | 0.46 | 0.54 | 9 | 0.47 | 0.53 | 10.6 |
| 1280.5 | 1286.3 | 20 | 20 | Chang, S (Sebastian) | | EBC | 1102.7 | 1109.2 | 4th Buffalo Trials 2018 (U14A) | 2 | 2018-05-05 | S | W | 1 | 0.75 | 0.25 | 4.1 | 0.75 | 0.25 | 5 |
| 1169.1 | 1163.3 | 20 | 20 | Chang, S (Sebastian) | | EBC | 936.4 | 936.4 | Buffalo City 1st Chess Trials 2018 (U14A) | 4 | 2018-02-17 | S | B | 1 | 0.73 | 0.27 | 4.5 | 0.72 | 0.28 | 5.6 |
| 980 | 980 | 20 | 20 | Chang, S (Sebastian) | | EBC | 710 | 710 | 2017 4Th Buffalo City Trials (U12 A) | 2 | 2017-05-20 | S | B | 1 | 0.83 | 0.17 | 2.8 | 0.17 | 0.83 | 16.6 |
| 980 | 980 | 20 | 20 | Chang, S (Sebastian) | | EBC | 710 | 710 | 2017 3Rd Buffalo City Trials (U12 A) | 2 | 2017-05-20 | S | B | 1 | 0.83 | 0.17 | 2.8 | 0.17 | 0.83 | 16.6 |
| 980 | 980 | 20 | 20 | Chang, S (Sebastian) | | EBC | 710 | 710 | 2017 2Nd Buffalo City Chess Trials (U12 A) | 3 | 2017-05-06 | S | W | 1 | 0.83 | 0.17 | 2.8 | 0.17 | 0.83 | 16.6 |
