| 1600.6 | 1552 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 2061.2 | 2117.4 | 2024 Gauteng Inter-Region Chess Championship (U20 Open+Girls) | 4 | 2024-01-14 | S | W | 0 | 0.01 | -0.01 | -0.2 | 0.01 | -0.01 | -0.2 |
| 1679.8 | 1676.9 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1910.6 | 1920.4 | 2023 Tshwane Chess Open Registration Tournament (A) | 1 | 2023-01-28 | S | B | 0 | 0.19 | -0.19 | -3.2 | 0.17 | -0.17 | -3.4 |
| 1125.1 | 1128.4 | 20 | 20 | Oosthuizen, MJ (Michal) | CM | GTP | 1579.1 | 1588.3 | 2018 Etienne Lewis Trials (U14 Boys) | 1 | 2018-08-31 | S | B | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 918 | 918 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1460 | 1460 | 2017 Gauteng Primary Schools Individuals (U13 Boys) | 3 | 2017-05-26 | S | B | 0 | 0.03 | -0.03 | -0.5 | -0.03 | 0.03 | 0.6 |
| 940 | 940 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1257 | 1257 | Menlo Open 2015 (B) | 1 | 2015-07-25 | S | W | 0 | 0.13 | -0.13 | -2.2 | -0.13 | 0.13 | 2.6 |
| 973 | 973 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1178 | 1178 | D4 Individual Trails 2015 (U11 Boys) | 2 | 2015-03-14 | S | W | 0 | 0.24 | -0.24 | -4 | -0.24 | 0.24 | 4.8 |
| 934 | 934 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1095 | 1095 | Etienne Lewis Under 10 Section H Born In ’05 ’06 | 8 | 2014-08-10 | S | W | 0 | 0.29 | -0.29 | -5.5 | -0.29 | 0.29 | 5.8 |
| 934 | 934 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1095 | 1095 | Gauteng Individual Trails 2014 - U 9 Boys Born On | 2 | 2014-06-21 | S | W | 1 | 0.29 | 0.71 | 11.8 | 0.71 | 0.29 | 5.8 |
| 797 | 797 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1133 | 1133 | D4 Individual Trials 2014 Under 9 Boys | 4 | 2014-06-07 | S | W | 1 | 0.12 | 0.88 | 14.6 | 0.88 | 0.12 | 2.4 |
| 809 | 809 | 20 | 20 | Oosthuizen, Mj (Michal) | | GTP | 1045 | 1045 | Etienne Lewis Tshwane Chess Trials 2013 U 10 | 2 | 2013-08-16 | S | B | 0 | 0.2 | -0.2 | -3.8 | -0.2 | 0.2 | 4 |
| 920 | 920 | 20 | 20 | Oosthuizen, Mj (Michal) | | GM | 1043 | 1043 | Gn Open 2012 - Section F Born On After 1 1 2005 | 4 | 2012-10-27 | S | W | 0 | 0.33 | -0.33 | -5.5 | -0.33 | 0.33 | 6.6 |