| 1306.7 | 1306.4 | 20 | 20 | Markgraaff, TC (TC Ivandro) | | NCP | 1356.8 | 1358 | HSDA Chess Club School Tournament 2023 (U16+U18) | 2 | 2023-07-29 | S | W | 0 | 0.48 | -0.48 | -8.1 | 0.48 | -0.48 | -9.6 |
| 1298.9 | 1299.4 | 20 | 20 | Markgraaff, TC (TC Ivandro) | | NCP | 1322.9 | 1329.5 | Pixley Ka Seme Schools Chess Trials 2023 (U18 Boys) | 4 | 2023-05-27 | S | W | 0 | 0.51 | -0.51 | -8.6 | 0.51 | -0.51 | -10.2 |
| 1298.9 | 1299.4 | 20 | 20 | Markgraaff, TC (TC Ivandro) | | NCP | 1322.9 | 1329.5 | Hopetown School Chess Open Tournament 2023 (U19) | 5 | 2023-05-06 | S | W | 0 | 0.51 | -0.51 | -8.6 | 0.51 | -0.51 | -10.2 |
| 1064.8 | 1074.4 | 20 | 20 | Markgraaff, TC (TC Ivandro) | | NCP | 1141.5 | 1126 | Pixley Chess Open 2 2021 (A) | 1 | 2021-04-17 | S | B | 1 | 0.37 | 0.63 | 10.5 | 0.4 | 0.6 | 12 |
