| 1711.6 | 1400.6 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1869.3 | 1522.2 | D4 Individuals 2022 (U18 Open) | 5 | 2022-04-23 | R | W | 0 | 0.36 | -0.36 | -4.3 | 0.4 | -0.4 | -8 |
| 1528.4 | 1534.8 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1731 | 1701.4 | 2019 Etienne Lewis Trials (U16 Boys) | 7 | 2019-09-01 | S | W | 0 | 0.31 | -0.31 | -6.2 | 0.35 | -0.35 | -7 |
| 1484.4 | 1493.9 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1686.4 | 1683.8 | 2019 D4 Individual Finals (U15 Mixed) | 4 | 2019-03-09 | S | W | 0.5 | 0.31 | 0.19 | 3.2 | 0.32 | 0.18 | 3.6 |
| 1435.1 | 1433.6 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1559.8 | 1562.4 | 2018 South African Junior Closed Chess Championships (U14 Open) | 7 | 2018-04-05 | S | W | 0 | 0.4 | -0.4 | -8 | 0.39 | -0.39 | -7.8 |
| 1248 | 1248 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1337 | 1337 | Sa Junior Closed Chess Championship 2016 (U12 Boys) | 11 | 2016-03-26 | S | W | 0.5 | 0.38 | 0.12 | 2.4 | 0.12 | 0.38 | 7.6 |
| 1266 | 1266 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1422 | 1422 | Constantiapark Open 2016 (B) | 4 | 2016-02-13 | S | W | 0.5 | 0.29 | 0.21 | 3.5 | 0.21 | 0.29 | 5.8 |
| 1346 | 1346 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1168 | 1168 | Lardies Open 2014 Section A - Open To All | 2 | 2014-11-08 | S | B | 1 | 0.73 | 0.27 | 4.5 | 0.27 | 0.73 | 14.6 |
| 1046 | 1046 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1045 | 1045 | Etienne Lewis Tshwane Chess Trials 2013 U 10 | 5 | 2013-08-17 | S | W | 1 | 0.5 | 0.5 | 9.4 | 0.5 | 0.5 | 10 |
| 1050 | 1050 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1114 | 1114 | 2013 Capablanca Open Chess Festival Chessa B Secti | 7 | 2013-05-01 | S | B | 0 | 0.41 | -0.41 | -7.7 | -0.41 | 0.41 | 8.2 |
| 0 | 0 | 20 | 20 | Oosthuizen, Mj (Michal) | | GM | 834 | 834 | D4 Individual Championship 2013 U 9 - Born On Afte | 6 | 2013-03-09 | R | W | 1 | 0 | 1 | 12 | 0 | 1 | 20 |
| 1074 | 1074 | 20 | 20 | Oosthuizen, Mj (Michal) | | GM | 1122 | 1122 | Blou Bull Open 2013 Section D | 3 | 2013-02-02 | S | W | 1 | 0.43 | 0.57 | 9.5 | 0.57 | 0.43 | 8.6 |
