| 1940 | 1871 | 20 | 20 | Willenberg, KS (Kenneth Sean) | CM | WCT | 1959.2 | 2009.4 | Hermanus Chess Club Open 2025 (Blitz) | 9 | 2025-04-11 | B | W | 1 | 0.52 | 0.48 | 1.7 | 0.38 | 0.62 | 12.4 |
| 1856.9 | 1852.9 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1843.3 | 1930.4 | GPCA Rapid 2023 (Championship) | 2 | 2023-06-24 | R | B | 0.5 | 0.47 | 0.03 | 0.3 | 0.37 | 0.13 | 2.6 |
| 1847.4 | 1851.9 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1856.9 | 1974 | Hermanus Rapid 2023 (A) | 6 | 2023-04-22 | R | B | 1 | 0.45 | 0.55 | 5.9 | 0.32 | 0.68 | 13.6 |
| 1844.9 | 1885.9 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1883.8 | 2030.6 | Casuarina International 2023 (Blitz) | 5 | 2023-03-11 | B | W | 0.5 | 0.5 | 0 | 0 | 0.37 | 0.13 | 2.6 |
| 1831.9 | 1851.9 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1903.9 | 2054.4 | Summer Slam 2022 (A) | 6 | 2022-12-13 | R | W | 0.5 | 0.46 | 0.04 | 0.4 | 0.31 | 0.19 | 3.8 |
| 1888 | 1897.7 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1934.3 | 1932.9 | 2022 Western Province Club League (Premier) | 10 | 2022-09-17 | S | W | 0.5 | 0.49 | 0.01 | 0.2 | 0.5 | 0 | 0 |
| 1904.9 | 1900 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1992.5 | 1981.3 | 2019 South African Closed Chess Championships (Open B) | 6 | 2019-12-12 | S | W | 0.5 | 0.44 | 0.06 | 1.2 | 0.45 | 0.05 | 1 |
| 1922.2 | 1919.7 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1988.8 | 1975.5 | 2019 Western Cape Club Championship (A+B) | 2 | 2019-10-26 | S | W | 0.5 | 0.46 | 0.04 | 0.7 | 0.48 | 0.02 | 0.4 |
| 1876 | 1869.8 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1964 | 2006.8 | 2019 Cape Town Classic Chess Festival (Rapid) | 4 | 2019-03-30 | R | W | 1 | 0.44 | 0.56 | 5.3 | 0.38 | 0.62 | 12.4 |
| 1876 | 1902.3 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1964 | 2029.4 | 2019 Cape Town Classic Chess Festival (Blitz) | 6 | 2019-03-29 | B | B | 0 | 0.36 | -0.36 | -1.3 | 0.31 | -0.31 | -6.2 |
| 1876.4 | 1873.8 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1980.3 | 1972.5 | 2018 Western Province League (Premier) | 4 | 2018-08-11 | S | W | 0 | 0.42 | -0.42 | -8.4 | 0.43 | -0.43 | -8.6 |
| 1861.8 | 1856.5 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 2028.9 | 2023.8 | 2018 Western Province Open (Elite) | 3 | 2018-03-03 | S | B | 0.5 | 0.26 | 0.24 | 4.8 | 0.26 | 0.24 | 4.8 |
| 1802 | 1802 | 20 | 20 | Willenberg, Ks (Kenneth) | | WP | 1910 | 1910 | 2017 South African Closed Chess Championships (B) | 5 | 2017-12-13 | S | B | 1 | 0.35 | 0.65 | 13 | 0.65 | 0.35 | 7 |
| 1810 | 1810 | 20 | 20 | Willenberg, Ks (Kenneth) | | WP | 1937 | 1937 | 2017 Western Province League (Premier) | 11 | 2017-09-16 | S | B | 0.5 | 0.33 | 0.17 | 3.4 | 0.17 | 0.33 | 6.6 |
| 1768 | 1768 | 20 | 20 | Willenberg, Ks (Kenneth) | | WP | 1941 | 1941 | Steinitz Chess Festival 2017 (Elite) | 2 | 2017-04-14 | S | B | 0 | 0.27 | -0.27 | -5.4 | -0.27 | 0.27 | 5.4 |
| 1436 | 1436 | 20 | 20 | Willenberg, Ks (Kenneth) | | WP | 2085 | 2085 | Western Province Individual Blitz Championship 15 | 5 | 2015-01-31 | B | W | 0 | 0.01 | -0.01 | -0 | -0.01 | 0.01 | 0.2 |
