| 1583.3 | 1567.9 | 20 | 20 | Marx, M (Marnu) | | WEG | 1513.8 | 1502.8 | Eden School Chess Trials 1 2024 (U15 Boys) | 4 | 2024-03-09 | S | W | 1 | 0.62 | 0.38 | 6.3 | 0.62 | 0.38 | 7.6 |
| 1595.6 | 1577.2 | 20 | 20 | Marx, M (Marnu) | | WEG | 1516.2 | 1500.5 | George Chess Trials 2 2023 (U15 Boys) | 4 | 2023-02-11 | S | W | 1 | 0.63 | 0.37 | 6.1 | 0.63 | 0.37 | 7.4 |
| 1597.5 | 1595.4 | 20 | 20 | Marx, M (Marnu) | | WEG | 1525.2 | 1522.5 | Eden Topskole 2022 (O13 Ope) | 2 | 2022-08-13 | S | W | 1 | 0.63 | 0.37 | 6.1 | 0.63 | 0.37 | 7.4 |
| 1633.3 | 1633.5 | 20 | 20 | Marx, M (Marnu) | | WEG | 1514.3 | 1509.4 | George Topskole 2022 (O13) | 2 | 2022-07-30 | S | W | 1 | 0.68 | 0.32 | 5.3 | 0.69 | 0.31 | 6.2 |
| 1674.2 | 1687.9 | 20 | 20 | Marx, M (Marnu) | | WEG | 1540.3 | 1550.6 | Western Cape Schools 2022 (U13 Boys) | 5 | 2022-05-29 | S | B | 0 | 0.61 | -0.61 | -10.4 | 0.62 | -0.62 | -12.4 |
| 1487.9 | 1570.8 | 20 | 20 | Marx, M (Marnu) | | WEG | 1530.9 | 1544.9 | George Trials 3 2022 (U13) | 4 | 2022-02-26 | S | W | 1 | 0.49 | 0.51 | 8.5 | 0.57 | 0.43 | 8.6 |
| 1328.3 | 1318.8 | 20 | 20 | Marx, M (Marnu) | | WEG | 1347.4 | 1329.6 | George Trial 3 2020 (U12) | 4 | 2020-02-22 | S | W | 1 | 0.52 | 0.48 | 8.2 | 0.53 | 0.47 | 9.4 |
| 1353.3 | 1344.4 | 20 | 20 | Marx, M (Marnu) | | WEG | 1270.5 | 1247.9 | George Trial 1 2020 (U12) | 5 | 2020-01-25 | S | W | 1 | 0.64 | 0.36 | 6.1 | 0.65 | 0.35 | 7 |
| 1210.4 | 1196.1 | 20 | 20 | Marx, M (Marnu) | | WEG | 1188.2 | 1189.7 | George Trials 2 2019 (U12) | 4 | 2019-02-09 | S | W | 1 | 0.57 | 0.43 | 7.1 | 0.55 | 0.45 | 9 |
| 0 | 0 | 20 | 20 | Marx, M (Marnu) | | WEG | 500 | 500 | George Trials 3 2017 (U10) | 3 | 2017-02-25 | S | B | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
