| 1888.3 | 1911.6 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2187.7 | 2197.2 | Cape Town Masters Challenge 2023 (IM Norm) | 8 | 2023-01-07 | S | B | 0 | 0.11 | -0.11 | -2.2 | 0.13 | -0.13 | -2.6 |
| 1915.4 | 1940.9 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2189.1 | 2197.8 | Western Cape Club Championship 2022 (Tier 1) | 6 | 2022-10-09 | S | W | 0 | 0.22 | -0.22 | -3.7 | 0.24 | -0.24 | -4.8 |
| 1915.4 | 1940.9 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2189.1 | 2197.8 | 2022 Western Province Club League (Premier) | 6 | 2022-09-03 | S | W | 0.5 | 0.22 | 0.28 | 5.6 | 0.24 | 0.26 | 5.2 |
| 1927.9 | 1982.9 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2256.6 | 2247.4 | Imam Haron 50th Commemoration Event Open 2019 | 6 | 2019-06-15 | R | B | 0.5 | 0.08 | 0.42 | 3.9 | 0.15 | 0.35 | 7 |
| 1927.9 | 1917.4 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2256.6 | 2261.2 | 2019 Elsies River Open (Elite) | 6 | 2019-06-23 | S | B | 0 | 0.08 | -0.08 | -1.4 | 0.06 | -0.06 | -1.2 |
| 1919.1 | 1960.6 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2260.8 | 2241.3 | Graham Solomon Memorial 2018 (Blitz) | 12 | 2018-11-25 | B | W | 0 | 0.14 | -0.14 | -0.7 | 0.22 | -0.22 | -4.4 |
| 1935 | 1935 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2200 | 2200 | Cape Town Acl Tournament - Masters Section 2017 | 2 | 2017-07-01 | S | B | 0 | 0.18 | -0.18 | -3.6 | -0.18 | 0.18 | 3.6 |
| 1913 | 1913 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2188 | 2188 | Wp Open 2017 (Elite) | 1 | 2017-03-03 | S | B | 0 | 0.17 | -0.17 | -3.2 | -0.17 | 0.17 | 3.4 |
| 1808 | 1808 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2135 | 2135 | Chess Wp Blitz Festival 2016 Team Blitz | 6 | 2016-10-29 | B | W | 1 | 0.13 | 0.87 | 3.1 | 0.87 | 0.13 | 2.6 |
| 1899 | 1899 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2109 | 2109 | Wp Open Chess Championship 2015 (Elite-Section) | 1 | 2015-08-07 | S | W | 0.5 | 0.23 | 0.27 | 5.4 | 0.27 | 0.23 | 4.6 |
| 1917 | 1917 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2124 | 2124 | Manyanani Chess Festival 2015 (Elite Section) | 1 | 2015-06-13 | S | W | 0 | 0.23 | -0.23 | -4.6 | -0.23 | 0.23 | 4.6 |
| 1917 | 1917 | 20 | 20 | Klaasen, Cj (Calvin) | | WP | 2120 | 2120 | Steinitz Open 2014 (Prestige A) | 6 | 2014-05-14 | S | B | 0 | 0.24 | -0.24 | -4.8 | -0.24 | 0.24 | 4.8 |
| 1883 | 1883 | 20 | 20 | Klaasen, Cj (Calvin) | | WP | 2124 | 2124 | Ample Sport Club Team Championship 2014 | 6 | 2014-03-23 | S | W | 1 | 0.2 | 0.8 | 15 | 0.8 | 0.2 | 4 |
| 1883 | 1883 | 20 | 20 | Klaasen, Cj (Calvin) | | WP | 2124 | 2124 | Western Province Open 2014 Prestige Section | 6 | 2014-03-09 | S | W | 1 | 0.2 | 0.8 | 13.9 | 0.8 | 0.2 | 4 |
| 1579 | 1579 | 20 | 20 | Klaasen, Cj (Calvin) | | WP | 2123 | 2123 | Western Province Team Blitz Championship 2013 | 9 | 2013-11-28 | B | B | 0 | 0.03 | -0.03 | -0.1 | -0.03 | 0.03 | 0.6 |
| 1844 | 1844 | 20 | 20 | Klaasen, Cj (Calvin) | FM | WP | 2122 | 2122 | Dsk2013 Prestige Section | 1 | 2013-07-19 | S | W | 0.5 | 0.17 | 0.33 | 6.6 | 0.33 | 0.17 | 3.4 |
| 1781 | 1781 | 20 | 20 | Klaasen, Cj (Calvin) | NM | WP | 2142 | 2142 | Western Province Open 2013 Premier Section | 4 | 2013-03-10 | S | W | 1 | 0.1 | 0.9 | 18 | 0.9 | 0.1 | 2 |
