| 1611.1 | 1612 | 20 | 20 | Coetsee, D (Dewald) | | GTP | 1690.3 | 1692.9 | 2023 Etienne Lewis Closed Tournament (U16) | 7 | 2023-08-27 | S | B | 0 | 0.37 | -0.37 | -7 | 0.36 | -0.36 | -7.2 |
| 1433.9 | 1424.4 | 20 | 20 | Coetsee, D (Dewald) | | GTP | 1565.1 | 1561.1 | 2022 Etienne Lewis (U16 Open) | 2 | 2022-09-03 | S | B | 0 | 0.31 | -0.31 | -5.8 | 0.3 | -0.3 | -6 |
| 1567.9 | 1563.3 | 20 | 20 | Coetsee, D (Dewald) | | GTP | 1556.2 | 1549.3 | South African Junior Closed Chess Championships 2022 (U14 Open) | 2 | 2022-03-28 | S | B | 0.5 | 0.47 | 0.03 | 0.6 | 0.47 | 0.03 | 0.6 |
| 1532.1 | 1515 | 20 | 20 | Coetsee, D (Dewald) | | GTP | 1565.7 | 1561.1 | 2021 Etienne Lewis Closed Trials (U14 Open) | 3 | 2021-09-24 | S | W | 0.5 | 0.5 | 0 | 0 | 0.49 | 0.01 | 0.2 |
| 1383.4 | 1380.5 | 20 | 20 | Coetsee, D (Dewald) | | GTP | 1326.6 | 1301.1 | 2019 Etienne Lewis Trials (U12 Boys) | 4 | 2019-08-31 | S | W | 0.5 | 0.61 | -0.11 | -2.2 | 0.63 | -0.13 | -2.6 |
| 1438.1 | 1433.9 | 20 | 20 | Coetsee, D (Dewald) | | GTP | 1386.9 | 1356.8 | 2019 Jacaranda Round Robin (E) | 5 | 2019-08-03 | S | B | 1 | 0.52 | 0.48 | 8 | 0.55 | 0.45 | 9 |
| 1171.9 | 1176.3 | 20 | 20 | Coetsee, D (Dewald) | | GTP | 1013.1 | 1019.8 | 2018 South African Junior Closed Chess Championships (U10 Open) | 2 | 2018-04-02 | S | B | 0 | 0.64 | -0.64 | -12.8 | 0.64 | -0.64 | -12.8 |
| 958 | 958 | 20 | 20 | Coetsee, D (Dewald) | | NWP | 888 | 888 | 2017 Chris Greyling (D) | 4 | 2017-04-22 | S | W | 0 | 0.6 | -0.6 | -10 | -0.6 | 0.6 | 12 |
| 772 | 772 | 20 | 20 | Coetsee, D (Dewald) | | NWP | 679 | 679 | Sa Junior Closed Chess Championship 2016 (U8 Boys) | 2 | 2016-03-21 | S | B | 1 | 0.63 | 0.37 | 7.4 | 0.37 | 0.63 | 12.6 |
| 801 | 801 | 20 | 20 | Coetsee, D (Dewald) | | NWP | 758 | 758 | South African Junior Team Championships 2015 (8A) | 6 | 2016-01-06 | S | B | 0 | 0.56 | -0.56 | -11.2 | -0.56 | 0.56 | 11.2 |
