| 1641.7 | 1650.3 | 28 | 28 | Van Der Westhuizen, M (Mika) | | WOS | 1530.7 | 1563.3 | Overberg Schools High School Closed 2026 (U15 Girls) | 4 | 2026-03-07 | S | B | 0 | 0.59 | -0.59 | -13.7 | 0.56 | -0.56 | -15.7 |
| 1520.1 | 1575.4 | 20 | 20 | Van Der Westhuizen, M (Mika) | | WOS | 1391.6 | 1418.8 | South African Junior Closed Chess Championships 2025 (U14 Girls) | 1 | 2025-03-31 | S | W | 1 | 0.69 | 0.31 | 6.2 | 0.72 | 0.28 | 5.6 |
| 1578.2 | 1563.8 | 20 | 20 | Van Der Westhuizen, M (Mika) | | WOS | 1398.9 | 1420 | Overberg Schools - PS Closed 2025 (U13 Girls) | 4 | 2025-03-08 | S | B | 1 | 0.67 | 0.33 | 5.5 | 0.63 | 0.37 | 7.4 |
| 1403.3 | 1358.4 | 20 | 20 | Van Der Westhuizen, M (Mika) | | WOS | 1400.9 | 1454.9 | Overberg GP Invitational Day 1 2024 (B) | 4 | 2024-09-26 | S | B | 1 | 0.46 | 0.54 | 9 | 0.35 | 0.65 | 13 |
| 1200 | 1200 | 20 | 20 | Van Der Westhuizen, M (Mika) | | WOS | 1200 | 1200 | Overberg Primary Schools Closed 2022 (U11 Girls) | 5 | 2022-03-12 | S | W | 0.5 | 0.54 | -0.04 | -0.7 | 0.54 | -0.04 | -0.8 |
