| 1764.7 | 1752.3 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1932.4 | 1939.8 | 2023 Tshwane South School District CLOSED Individual Championships (U18 Open) | 4 | 2023-04-22 | S | W | 1 | 0.35 | 0.65 | 10.8 | 0.32 | 0.68 | 13.6 |
| 1662.8 | 1662.2 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1873.7 | 1843.3 | 2021 Registration Tournament (A) | 4 | 2021-03-13 | S | W | 0.5 | 0.3 | 0.2 | 3.3 | 0.33 | 0.17 | 3.4 |
| 1599.9 | 1595.7 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1643.1 | 1641.5 | 2019 Capablanca Chess Festival (RR D) | 1 | 2019-04-18 | S | B | 0 | 0.41 | -0.41 | -8.2 | 0.4 | -0.4 | -8 |
| 1591.9 | 1592.6 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1739.5 | 1737.6 | 2019 Blou Bul (A) | 3 | 2019-02-16 | S | B | 0.5 | 0.29 | 0.21 | 3.5 | 0.29 | 0.21 | 4.2 |
| 1591.9 | 1592.6 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1739.5 | 1737.6 | 2019 Constantia Park Open (A) | 2 | 2019-02-09 | S | W | 0.5 | 0.37 | 0.13 | 2.2 | 0.37 | 0.13 | 2.6 |
| 1554.9 | 1560.9 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1579.1 | 1588.3 | 2018 Etienne Lewis Trials (U14 Boys) | 4 | 2018-09-01 | S | W | 0.5 | 0.51 | -0.01 | -0.2 | 0.51 | -0.01 | -0.2 |
| 1396.9 | 1407.1 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1559.8 | 1562.4 | 2018 South African Junior Closed Chess Championships (U14 Open) | 2 | 2018-04-02 | S | W | 1 | 0.35 | 0.65 | 13 | 0.36 | 0.64 | 12.8 |
| 1204 | 1204 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1416 | 1416 | Sa Junior Closed Chess Championship 2017 (U12 Open) | 10 | 2017-04-10 | S | W | 0 | 0.23 | -0.23 | -4.6 | -0.23 | 0.23 | 4.6 |
| 1229 | 1229 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1415 | 1415 | 2017 Laerskool Constantiapark Ope (B) | 4 | 2017-02-11 | S | W | 0 | 0.26 | -0.26 | -4.4 | -0.26 | 0.26 | 5.2 |
| 1086 | 1086 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1344 | 1344 | 2016 Gauteng D4 Individuals (U13 Boys) | 3 | 2016-04-16 | S | W | 0 | 0.18 | -0.18 | -3 | -0.18 | 0.18 | 3.6 |
| 1132 | 1132 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1202 | 1202 | Sa Junior Closed Chess Championship 2015 (Under 10 Open) | 8 | 2015-04-08 | S | B | 0 | 0.4 | -0.4 | -8 | -0.4 | 0.4 | 8 |
| 1060 | 1060 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1202 | 1202 | Constantiapark Open 2015 Section C | 4 | 2015-02-21 | S | W | 1 | 0.31 | 0.69 | 11.5 | 0.69 | 0.31 | 6.2 |
| 974 | 974 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1095 | 1095 | Etienne Lewis Under 10 Section H Born In ’05 ’06 | 9 | 2014-08-10 | S | B | 0.5 | 0.34 | 0.16 | 3 | 0.16 | 0.34 | 6.8 |
| 756 | 756 | 20 | 20 | Oosthuizen, Mj (Michal) | | GM | 1043 | 1043 | Gn Open 2012 - Section F Born On After 1 1 2005 | 5 | 2012-10-26 | S | B | 0 | 0.16 | -0.16 | -2.7 | -0.16 | 0.16 | 3.2 |
