| 2301.6 | 2355.3 | 20 | 20 | Klaasen, CJ (Calvin John) | FM | WCT | 2199.7 | 2224.1 | Cape Gambit Invitational 2025 | 6 | 2025-04-20 | S | W | 1 | 0.66 | 0.34 | 6.8 | 0.69 | 0.31 | 6.2 |
| 2299.9 | 2343 | 20 | 20 | Klaasen, CJ (Calvin John) | FM | WCT | 2195.6 | 2221.8 | Cape Town Open Chess Festival 2025 (A) | 5 | 2025-03-23 | S | B | 0.5 | 0.58 | -0.08 | -1.5 | 0.6 | -0.1 | -2 |
| 2299.9 | 2343 | 20 | 20 | Klaasen, CJ (Calvin John) | FM | WCT | 2195.6 | 2221.8 | Western Cape Closed 2025 (A) | 6 | 2025-03-09 | S | W | 0.5 | 0.66 | -0.16 | -3 | 0.68 | -0.18 | -3.6 |
| 2284.3 | 2326.8 | 20 | 20 | Klaasen, CJ (Calvin John) | FM | WCT | 2192.1 | 2219.1 | Cape of Good Hope Open 2025 (Championship) | 5 | 2025-02-23 | S | W | 1 | 0.65 | 0.35 | 5.8 | 0.67 | 0.33 | 6.6 |
| 2238 | 2365 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2209.5 | 2228.9 | Cape Town Masters Challenge 2024 (Masters) | 7 | 2024-01-06 | S | W | 0.5 | 0.57 | -0.07 | -1.4 | 0.7 | -0.2 | -4 |
| 2013.3 | 2050.5 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2170.1 | 2198 | CW Top Schools 2023 (Advanced) | 6 | 2023-08-13 | S | W | 0 | 0.36 | -0.36 | -6.8 | 0.37 | -0.37 | -7.4 |
| 1921.7 | 1988.5 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2189.4 | 2198 | CKC Invitational Masters 2023 | 4 | 2023-06-11 | S | B | 0 | 0.15 | -0.15 | -3 | 0.21 | -0.21 | -4.2 |
| 1781.9 | 1781.9 | 20 | 20 | Klaasen, CJ (Calvin) | FM | WCT | 2185.3 | 2195 | Cape Town Open 2023 (Championship) | 6 | 2023-03-26 | S | W | 0 | 0.07 | -0.07 | -1.3 | 0.06 | -0.06 | -1.2 |
