| 1449.2 | 1359.6 | 20 | 20 | Williams, C (Clarance-John) | | WCU | 1147.2 | 1101.4 | Lower West Coast High Schools Prestige 2023 (U15 Boys) | 3 | 2023-02-11 | R | B | 1 | 0.81 | 0.19 | 2.3 | 0.76 | 0.24 | 4.8 |
| 1461 | 1357.8 | 20 | 20 | Williams, C (Clarance-John) | | WCU | 1134.7 | 1041.4 | West Coast Chess Open 2022 (U13 Boys) | 2 | 2022-10-15 | R | W | 0 | 0.92 | -0.92 | -9.9 | 0.91 | -0.91 | -18.2 |
| 1441.2 | 1354.9 | 20 | 20 | Williams, C (Clarance-John) | | WCU | 1052.2 | 976 | Pedro Booyse Top Schools 2022 (U13 Open) | 5 | 2022-07-23 | S | W | 1 | 0.99 | 0.01 | 0.2 | 0.98 | 0.02 | 0.4 |
| 1418.4 | 1262.1 | 20 | 20 | Williams, C (Clarance-John) | | WCU | 1044 | 880.4 | Onder-Weskus Top Skole 2022 (O13 Seuns) | 2 | 2022-06-04 | R | W | 1 | 0.98 | 0.02 | 0.2 | 0.99 | 0.01 | 0.2 |
| 1305.8 | 1261.7 | 20 | 20 | Williams, C (Clarance-John) | | WCU | 1010.5 | 810.8 | Lower West Coast Schools Chess Prestige 2021 (U13 Boys) | 2 | 2021-05-15 | R | B | 1 | 0.8 | 0.2 | 2.4 | 0.98 | 0.02 | 0.4 |
