| 2249.8 | 2274 | 16 | 16 | Willenberg, KS (Kenneth Sean) | CM | WCT | 1960.3 | 1938.4 | Western Cape Women's Championship 2026 (Advanced) | 3 | 2026-08-08 | S | W | 1 | 0.87 | 0.13 | 2.1 | 0.93 | 0.07 | 1.1 |
| 2250.3 | 2312.4 | 16 | 16 | Willenberg, KS (Kenneth Sean) | CM | WCT | 1958.1 | 2019.6 | Hermanus Chess Club Open 2026 (Championship) | 3 | 2026-04-18 | R | B | 1 | 0.8 | 0.2 | 1.5 | 0.8 | 0.2 | 3.2 |
| 2216.2 | 2305.7 | 20 | 20 | Willenberg, KS (Kenneth Sean) | CM | WCT | 1981.6 | 2002.5 | Bellville Rapid 2025 (A) | 6 | 2025-06-07 | R | B | 0 | 0.73 | -0.73 | -6.9 | 0.81 | -0.81 | -16.2 |
| 2203.8 | 2330 | 20 | 20 | Willenberg, KS (Kenneth Sean) | CM | WCT | 1949.9 | 1981.5 | Steinitz Festival 2025 (Open) | 7 | 2025-03-15 | R | W | 1 | 0.84 | 0.16 | 1.5 | 0.95 | 0.05 | 1 |
| 2203.8 | 1928.4 | 20 | 20 | Willenberg, KS (Kenneth Sean) | CM | WCT | 1949.9 | 1996.9 | Steinitz Festival 2025 (Blitz) | 4 | 2025-03-14 | B | W | 1 | 0.84 | 0.16 | 0.6 | 0.46 | 0.54 | 10.8 |
| 2254.7 | 2343.6 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1958.4 | 1986.9 | Steinitz Chess Festival 2024 (Open Rapid) | 5 | 2024-05-11 | R | W | 1 | 0.89 | 0.11 | 1 | 0.96 | 0.04 | 0.8 |
| 2270.5 | 2374.7 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1964.4 | 2002.3 | Hermanus Chess Club Open 2024 (Championship) | 7 | 2024-04-20 | R | B | 1 | 0.81 | 0.19 | 1.8 | 0.89 | 0.11 | 2.2 |
| 2274.1 | 2309.5 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1973.4 | 1980.9 | Cape Town Open Chess Championship 2024 (Championship) | 3 | 2024-03-16 | S | W | 1 | 0.89 | 0.11 | 2.1 | 0.92 | 0.08 | 1.6 |
| 2050.7 | 2073.3 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1888 | 1878.5 | Kraaifontein Open 2023 (Championship) | 5 | 2023-12-10 | S | W | 0.5 | 0.73 | -0.23 | -4.3 | 0.77 | -0.27 | -5.4 |
| 2042.6 | 2073.7 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1873 | 1863.7 | WP Club League 2023 (A) | 1 | 2023-07-29 | S | B | 1 | 0.66 | 0.34 | 6.8 | 0.7 | 0.3 | 6 |
| 2038.4 | 1747.4 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1843.3 | 1930.4 | GPCA Rapid 2023 (Championship) | 5 | 2023-06-24 | R | W | 0 | 0.77 | -0.77 | -8.3 | 0.33 | -0.33 | -6.6 |
| 2019 | 1200 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1883.8 | 2030.6 | Casuarina International 2023 (Blitz) | 8 | 2023-03-11 | B | B | 0 | 0.62 | -0.62 | -2.2 | 0 | 0 | 0 |
| 1986 | 2047.9 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1903.9 | 1903.5 | George Open 2022 (A) | 4 | 2022-12-03 | S | B | 0.5 | 0.55 | -0.05 | -0.8 | 0.63 | -0.13 | -2.6 |
| 1883.5 | 1893.4 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1964.1 | 1964.1 | South African Open 2022 (Championship) | 11 | 2022-07-17 | S | W | 1 | 0.45 | 0.55 | 11 | 0.46 | 0.54 | 10.8 |
