| 1289.5 | 1322.7 | 20 | 20 | Van Der Merwe, S (Sebastian) | | EBC | 1183.1 | 1193.4 | BC Schools Chess Festival 2025 (U11 Open) | 2 | 2025-07-26 | S | W | 0 | 0.67 | -0.67 | -11.1 | 0.69 | -0.69 | -13.8 |
| 1330.3 | 1387 | 20 | 20 | Van Der Merwe, S (Sebastian) | | EBC | 1182.1 | 1197.9 | 2nd BC Trials 2024 (U12A) | 1 | 2024-03-09 | S | B | 1 | 0.63 | 0.37 | 6.1 | 0.68 | 0.32 | 6.4 |
| 1250.3 | 1200 | 20 | 20 | Van Der Merwe, S (Sebastian) | | EBC | 1225.1 | 1200 | BC Vikings Blitz Championship 2023 | 6 | 2023-10-05 | B | W | 1 | 0.57 | 0.43 | 1.5 | 0.54 | 0.46 | 9.2 |
| 1239.9 | 1249 | 20 | 20 | Van Der Merwe, S (Sebastian) | | EBC | 1190.6 | 1182 | Slum Knights 3rd Open 2022 (C) | 4 | 2022-09-18 | R | B | 1 | 0.52 | 0.48 | 6.3 | 0.54 | 0.46 | 9.2 |
| 1239.9 | 1249 | 20 | 20 | Van Der Merwe, S (Sebastian) | | EBC | 1190.6 | 1182 | Slum Knights 2nd Open 2022 (C) | 5 | 2022-09-17 | R | B | 0 | 0.52 | -0.52 | -6.9 | 0.54 | -0.54 | -10.8 |
