| Feb 7, 2026 | Cardon | ½–½ | Heinert | Round 7: Cardon, Helmut - Heinert, Eugen | Slav Defense: Quiet Variation, Pin Defense | |
| Dec 13, 2025 | Kooijmans | 1–0 | Cardon | Round 5: Kooijmans, Jermo - Cardon, Helmut | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Oct 25, 2025 | Lindgren | 1–0 | Cardon | Round 7: Lindgren, Philip - Cardon, Helmut | Semi-Slav Defense: Botvinnik Variation | |
| Oct 22, 2025 | Cardon | 0–1 | Stohl | Round 4: Cardon, Helmut - Stohl, Igor | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Oct 20, 2025 | Bosman | ½–½ | Cardon | Round 2: Bosman, Michiel - Cardon, Helmut | Slav Defense: Quiet Variation, Schallopp Defense | |
| Oct 4, 2025 | Eerens | ½–½ | Cardon | Round 2: Eerens, Pim - Cardon, Helmut | Catalan Opening: Open Defense | |
| May 13, 2025 | Cardon | ½–½ | Jakhari | Round 9: Cardon, Helmut - Jakhari, Ansh | King's Indian Defense: Makogonov Variation | |
| Apr 5, 2025 | Cardon | 0–1 | Wemmers | KNSB Meesterklasse 2024-2025 | Nimzo-Indian Defense: Classical Variation | |
| Feb 8, 2025 | Aravindhan | ½–½ | Cardon | KNSB Meesterklasse 2024-2025 | Caro-Kann Defense: Classical Variation, Lobron System | |
| Feb 8, 2025 | Zwirs | 1–0 | Cardon | KNSB Meesterklasse 2024-2025 | Caro-Kann Defense: Exchange Variation | |
| Nov 23, 2024 | Cardon | 0–1 | Slagboom | Meesterklasse 24-25 | King's Indian Defense: Normal Variation | |
| Oct 25, 2024 | Cardon | ½–½ | Sahidi | 39th European Chess Club Cup | Nimzo-Indian Defense: Classical Variation, Milner-Barry Variation | |
| Oct 24, 2024 | Valner | 1–0 | Cardon | 39th European Chess Club Cup | Sicilian Defense: Closed | |
| Oct 22, 2024 | Diermair | 1–0 | Cardon | 39th European Chess Club Cup | King's Indian Attack | |
| Oct 21, 2024 | Cardon | 0–1 | Boruchovsky | 39th European Chess Club Cup | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Oct 20, 2024 | Neagu | 0–1 | Cardon | 39th European Chess Club Cup | Semi-Slav Defense: Botvinnik Variation | |
| Oct 12, 2024 | Cardon | 0–1 | Elgersma | KNSB Meesterklasse 2024-2025 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Sep 21, 2024 | Beukema | 1–0 | Cardon | KNSB Meesterklasse 2024-2025 | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Dec 14, 2024 | Cardon | 0–1 | Lenaerts | Round 5: Cardon, Helmut - Lenaerts, Lennert | Queen's Indian Accelerated | |
| Nov 9, 2024 | Bosman | ½–½ | Cardon | Round 3: Bosman, Michiel - Cardon, Helmut | Slav Defense: Quiet Variation, Schallopp Defense | |
| Oct 23, 2024 | Cardon | 0–1 | Laurusas | Round 4: Cardon, Helmut - Laurusas, Tomas | Slav Defense: Quiet Variation, Schallopp Defense | |
