| 1395.5 | 1366.2 | 20 | 20 | Van Der Merwe, M (Marthinus) | | FMB | 1217.2 | 1316.8 | Mzansi Interprovincial Youth Chess Championships 2024 (U14 Open Championship) | 4 | 2024-12-17 | S | W | 1 | 0.75 | 0.25 | 5 | 0.6 | 0.4 | 8 |
| 1225.9 | 1202.4 | 20 | 20 | Van Der Merwe, M (Marthinus) | | FMB | 1209.2 | 1284.8 | Inter Regional Chess Championship 2023 (U12) | 3 | 2023-05-20 | S | B | 1 | 0.48 | 0.52 | 8.7 | 0.36 | 0.64 | 12.8 |
| 1198.8 | 1197.7 | 20 | 20 | Van Der Merwe, M (Marthinus) | | FMB | 1372.2 | 1369.9 | Mangaung Metro July Trials 2019 (U8) | 5 | 2019-07-20 | S | B | 0 | 0.26 | -0.26 | -4.4 | 0.26 | -0.26 | -5.2 |
| 1214.8 | 1216.8 | 20 | 20 | Van Der Merwe, M (Marthinus) | | FMB | 1275.4 | 1288.4 | Mangaung Metro Chess 31 May to 1 June 2019 (G) | 5 | 2019-06-01 | S | B | 0 | 0.39 | -0.39 | -6.6 | 0.37 | -0.37 | -7.4 |
| 1200 | 1200 | 20 | 20 | Van Der Merwe, M (Marthinus) | | FMB | 1182.8 | 1180.4 | Mangaung Metro Chess 12 to 13 April 2019 (G) | 2 | 2019-04-12 | S | B | 0 | 0.48 | -0.48 | -8.1 | 0.48 | -0.48 | -9.6 |
