| 1651.3 | 1534.9 | 20 | 20 | Van Der Westhuizen, M (Mika) | | WOS | 1519.4 | 1315.2 | Overberg Schools High School Trials 2026 (U15 Girls) | 5 | 2026-02-21 | R | B | 1 | 0.61 | 0.39 | 4.7 | 0.71 | 0.29 | 5.8 |
| 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 |
| 1568.4 | 1395.9 | 20 | 20 | Van Der Westhuizen, M (Mika) | | WOS | 1387.6 | 1301.3 | Overberg Schools - PS Trials (Region 1) 2025 (U13 Girls) | 6 | 2025-02-22 | R | B | 1 | 0.67 | 0.33 | 4 | 0.57 | 0.43 | 8.6 |
| 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 |
| 1322.4 | 1294.5 | 20 | 20 | Van Der Westhuizen, M (Mika) | | WOS | 1437 | 1360.7 | Overberg Schools - PS Trials Region 3 2024 (U13 Girls) | 5 | 2024-03-02 | R | W | 1 | 0.41 | 0.59 | 7.1 | 0.46 | 0.54 | 10.8 |
| 1211.6 | 1199.8 | 20 | 20 | Van Der Westhuizen, M (Mika) | | WOS | 1206.6 | 1275.4 | Overberg Primary School Trials (Region 2) | 4 | 2023-03-10 | R | W | 1 | 0.55 | 0.45 | 4.2 | 0.45 | 0.55 | 11 |
| 1213.2 | 1200 | 20 | 20 | Van Der Westhuizen, M (Mika) | | WOS | 1164.7 | 1200 | OCF Youth Day Tournament 2022 (C) | 5 | 2022-06-18 | R | B | 0 | 0.51 | -0.51 | -4 | 0.46 | -0.46 | -9.2 |
| 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 |
