| 1552 | 1526.2 | 20 | 20 | Du Plessis, S (Stefan) | | WCU | 1438 | 1365 | Pedro Booyse Top Schools Championships 2024 (U18) | 2 | 2024-07-20 | S | B | 1 | 0.59 | 0.41 | 6.8 | 0.65 | 0.35 | 7 |
| 1552 | 1526.2 | 20 | 20 | Du Plessis, S (Stefan) | | WCU | 1438 | 1365 | Pedro Booyse Top Schools Championships 2024 (U18) | 5 | 2024-07-20 | S | W | 1 | 0.67 | 0.33 | 5.5 | 0.73 | 0.27 | 5.4 |
| 1632.4 | 1595.3 | 20 | 20 | Du Plessis, S (Stefan) | | WCU | 1444 | 1430.4 | Lower West Top Schools 2024 (U18) | 1 | 2024-05-11 | R | W | 1 | 0.76 | 0.24 | 2.9 | 0.73 | 0.27 | 5.4 |
| 1630.6 | 1567.7 | 20 | 20 | Du Plessis, S (Stefan) | | WCU | 1475.8 | 1381.8 | West Coast Schools Chess Prestige Championships 2024 (U18+U20 Boys) | 3 | 2024-02-24 | R | W | 1 | 0.72 | 0.28 | 3.4 | 0.76 | 0.24 | 4.8 |
| 1603.7 | 1483.9 | 20 | 20 | Du Plessis, S (Stefan) | | WCU | 1468.7 | 1346.2 | West Coast Primary Schools Grand Challenge League 2023 (High School) | 3 | 2023-10-21 | R | W | 1 | 0.7 | 0.3 | 2.3 | 0.7 | 0.3 | 6 |
| 1493.4 | 1486.5 | 20 | 20 | Du Plessis, S (Stefan) | | WCU | 1323.6 | 1254.9 | West Coast High School Championships 2023 (U17 Boys) | 3 | 2023-02-18 | S | W | 1 | 0.74 | 0.26 | 4.3 | 0.81 | 0.19 | 3.8 |
| 1493.4 | 1436.1 | 20 | 20 | Du Plessis, S (Stefan) | | WCU | 1323.6 | 1281.8 | Lower West Coast High Schools Prestige 2023 (U17 Boys) | 5 | 2023-02-11 | R | B | 1 | 0.66 | 0.34 | 4.1 | 0.64 | 0.36 | 7.2 |
| 1470.9 | 1309.7 | 20 | 20 | Du Plessis, S (Stefan) | | WCU | 1320.4 | 1283.2 | West Coast Schools Chess Grand Challenge 2022 (HS Super) | 3 | 2022-10-29 | R | W | 1 | 0.72 | 0.28 | 3.4 | 0.57 | 0.43 | 8.6 |
| 1388.5 | 1308.9 | 20 | 20 | Du Plessis, S (Stefan) | | WCU | 1248.2 | 1288.2 | Lower West Coast 2021 (U15 Boys) | 3 | 2021-04-10 | R | W | 1 | 0.71 | 0.29 | 3.5 | 0.57 | 0.43 | 8.6 |
| 1301.3 | 1214 | 20 | 20 | Du Plessis, S (Stefan) | | WCU | 1126 | 1006.4 | Weskus Skole Prestige Skaak Kampioenskappe 2019 (O13 Seuns) | 4 | 2019-04-06 | S | W | 1 | 0.75 | 0.25 | 4.1 | 0.78 | 0.22 | 4.4 |
| 1185.1 | 1153.9 | 20 | 20 | Du Plessis, S (Stefan) | | WCU | 922 | 906.8 | 2018 Swartland Open (B) | 3 | 2018-09-15 | S | B | 0 | 0.76 | -0.76 | -12.6 | 0.75 | -0.75 | -15 |
