| 2258.3 | 2267.4 | 20 | 20 | Willenberg, KS (Kenneth Sean) | CM | WCT | 1959.2 | 1980.4 | Hermanus Chess Club Open 2025 (Championship) | 4 | 2025-04-12 | R | B | 0.5 | 0.81 | -0.31 | -3.3 | 0.79 | -0.29 | -5.8 |
| 2258.3 | 2321.8 | 20 | 20 | Willenberg, KS (Kenneth Sean) | CM | WCT | 1959.2 | 2009.4 | 2025 CT Chess Club Blitz Championship | 3 | 2025-03-19 | B | W | 0.5 | 0.89 | -0.39 | -1.4 | 0.91 | -0.41 | -8.2 |
| 2285.1 | 2302.8 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1974.1 | 1963.7 | 2022 South African Closed Chess Championships (Open) | 4 | 2022-05-09 | S | W | 0.5 | 0.9 | -0.4 | -8 | 0.94 | -0.44 | -8.8 |
| 2333.5 | 2325.9 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1942.9 | 1985.8 | 2019 GPCA Rapid (Open) | 5 | 2019-06-29 | R | B | 0.5 | 0.91 | -0.41 | -3.9 | 0.85 | -0.35 | -7 |
| 2333.5 | 2346.8 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1942.9 | 1953.7 | South African Open Chess Championships 2019 (A) | 2 | 2019-06-16 | S | B | 1 | 0.91 | 0.09 | 1.8 | 0.92 | 0.08 | 1.6 |
| 2333.5 | 2356.8 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1942.9 | 2021.6 | South African Open Chess Championships 2019 (Blitz) | 6 | 2019-06-19 | B | B | 0 | 0.91 | -0.91 | -3.3 | 0.85 | -0.85 | -17 |
| 2344.3 | 2345.3 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1955.4 | 1971.3 | Steinitz Chess Festival 2019 (A) | 3 | 2019-04-06 | S | B | 1 | 0.91 | 0.09 | 1.6 | 0.89 | 0.11 | 2.2 |
| 2352.1 | 2354.1 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 1958.6 | 1968.5 | Cape of Good Hope Open 2019 (Elite) | 5 | 2019-01-27 | S | W | 0.5 | 1 | -0.5 | -8.7 | 0.99 | -0.49 | -9.8 |
| 2340.3 | 2339.3 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 2028.9 | 2023.8 | 2018 Western Province Open (Elite) | 2 | 2018-03-03 | S | W | 1 | 0.9 | 0.1 | 2 | 0.91 | 0.09 | 1.8 |
| 2340.3 | 2339.3 | 20 | 20 | Willenberg, KS (Kenneth) | CM | WCT | 2028.9 | 2023.8 | 2018 Steinitz Chess Festival (Prestige) | 5 | 2018-03-24 | S | W | 1 | 0.9 | 0.1 | 2 | 0.91 | 0.09 | 1.8 |
| 2346 | 2346 | 20 | 20 | Willenberg, Ks (Kenneth) | | WP | 1954 | 1954 | Steinitz Chess Festival 2017 (Elite) | 3 | 2017-04-15 | S | B | 0 | 0.92 | -0.92 | -18.4 | -0.92 | 0.92 | 18.4 |
| 2315 | 2315 | 20 | 20 | Willenberg, Ks (Kenneth) | | WP | 1976 | 1976 | Wp Open Chess Championship 2015 (Elite-Section) | 1 | 2015-08-07 | S | B | 1 | 0.88 | 0.12 | 2.4 | 0.12 | 0.88 | 17.6 |
| 2310 | 2310 | 20 | 20 | Willenberg, Ks (Kenneth) | | WP | 1998 | 1998 | Manyanani Chess Festival 2015 (Elite Section) | 3 | 2015-06-14 | S | W | 1 | 0.86 | 0.14 | 2.8 | 0.14 | 0.86 | 17.2 |
