| 2321.4 | 2321.9 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2162.4 | 2190.3 | WP Club League 2023 (A) | 2 | 2023-07-29 | S | W | 0.5 | 0.73 | -0.23 | -4.6 | 0.69 | -0.19 | -3.8 |
| 2331.5 | 2331.5 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2243.8 | 2255.8 | 2019 Western Province League (Premier) | 4 | 2019-08-03 | S | B | 1 | 0.56 | 0.44 | 8.8 | 0.55 | 0.45 | 9 |
| 2353.1 | 2353.1 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2231.2 | 2231.6 | 2018 Western Province League (Premier) | 10 | 2018-09-08 | S | W | 0.5 | 0.68 | -0.18 | -3.6 | 0.68 | -0.18 | -3.6 |
| 2259 | 2259 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2247 | 2247 | 2017 South African Closed Chess Championships (Open) | 10 | 2017-12-18 | S | W | 0.5 | 0.52 | -0.02 | -0.4 | -0.02 | 0.52 | 10.4 |
| 2255 | 2255 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2159 | 2159 | 2016 Capablanca (Im Norm) | 1 | 2016-04-26 | S | B | 0.5 | 0.63 | -0.13 | -2.6 | -0.13 | 0.63 | 12.6 |
| 2260 | 2260 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2113 | 2113 | Sa Closed 2015 (Open A) | 1 | 2015-12-12 | S | B | 0 | 0.7 | -0.7 | -14 | -0.7 | 0.7 | 14 |
| 2252 | 2252 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2113 | 2113 | Western Province League 2015 (Premier) | 9 | 2015-10-03 | S | B | 0.5 | 0.69 | -0.19 | -3.8 | -0.19 | 0.69 | 13.8 |
| 2262 | 2262 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2116 | 2116 | Steinitz Chess Festival 2015 (Elite) | 5 | 2015-09-26 | S | B | 0.5 | 0.7 | -0.2 | -4 | -0.2 | 0.7 | 14 |
| 2262 | 2262 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2109 | 2109 | Wp Open Chess Championship 2015 (Elite-Section) | 4 | 2015-08-09 | S | B | 0.5 | 0.7 | -0.2 | -4 | -0.2 | 0.7 | 14 |
| 2257 | 2257 | 20 | 20 | Klaasen, Cj (Calvin) | | WP | 2124 | 2124 | South African Closed 2014 (Open A) | 4 | 2014-01-06 | S | B | 1 | 0.68 | 0.32 | 6.4 | 0.32 | 0.68 | 13.6 |
| 2372 | 2372 | 20 | 20 | Klaasen, Cj (Calvin) | | WP | 2123 | 2123 | Western Province Individual Blitz Championship2013 | 5 | 2013-11-21 | B | B | 0 | 0.81 | -0.81 | -2.9 | -0.81 | 0.81 | 16.2 |
| 2257 | 2257 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2094 | 2094 | Western Province Closed 2013 (A-Section) | 2 | 2013-08-23 | S | W | 0.5 | 0.72 | -0.22 | -4.1 | -0.22 | 0.72 | 14.4 |
| 2296 | 2296 | 20 | 20 | Klaasen, Cj (Calvin) | NM | WP | 2151 | 2151 | South African Open Chess Championship 2012 (Open) | 11 | 2012-07-08 | S | B | 0.5 | 0.7 | -0.2 | -4 | -0.2 | 0.7 | 14 |
