| May 24, 2026 | Kamphuis | 0–1 | Jellema | Round 13: Kamphuis, Jasper - Jellema, Pieter | Caro-Kann Defense: Forgacs Variation | |
| May 24, 2026 | Den Hartog | 0–1 | Kamphuis | Round 12: Den Hartog, Marijn - Kamphuis, Jasper | Vienna Game: Mieses Variation | |
| May 24, 2026 | Kamphuis | ½–½ | Aravindhan | Round 11: Kamphuis, Jasper - Aravindhan, Achyuth | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| May 24, 2026 | Grochal | 0–1 | Kamphuis | Round 10: Grochal, Joey - Kamphuis, Jasper | King's Indian Defense: Petrosian Variation, Stein Defense | |
| May 24, 2026 | Pel | 1–0 | Kamphuis | Round 8: Pel, Bonno - Kamphuis, Jasper | Hungarian Opening: Reversed Modern Defense | |
| May 24, 2026 | Kamphuis | 0–1 | Bekker | Round 9: Kamphuis, Jasper - Bekker, Stefan | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| May 23, 2026 | Terlouw | 1–0 | Kamphuis | Round 5: Terlouw, Wouter - Kamphuis, Jasper | Trompowsky Attack: Classical Defense, Big Center Variation | |
| May 23, 2026 | Kamphuis | ½–½ | Simenon | Round 7: Kamphuis, Jasper - Simenon, Jozef | Modern Defense: Norwegian Defense | |
| May 23, 2026 | Kamphuis | 0–1 | Van der Werf | Round 4: Kamphuis, Jasper - Van der Werf, Mark | Scotch Game: Scotch Gambit, Advance Variation | |
| May 23, 2026 | Slagboom | 1–0 | Kamphuis | Round 3: Slagboom, Leandro - Kamphuis, Jasper | Ruy Lopez: Morphy Defense, Norwegian Variation | |
| May 23, 2026 | Kamphuis | 0–1 | Ootes | Round 2: Kamphuis, Jasper - Ootes, Lars | Modern Defense: Standard Defense | |
| May 23, 2026 | De Boer | 1–0 | Kamphuis | Round 1: De Boer, Eelke - Kamphuis, Jasper | Ruy Lopez: Morphy Defense, Norwegian Variation | |
| May 19, 2026 | Grooten | 1–0 | Kamphuis | Round 6: Grooten, Tommy - Kamphuis, Jasper | Réti Opening: Advance Variation, Michel Gambit | |
| May 15, 2026 | Kamphuis | 0–1 | Van Foreest | Round 3: Kamphuis, Jasper - Van Foreest, Pieter | Italian Game: Scotch Gambit, Max Lange Attack | |
| May 14, 2026 | Leenes | 1–0 | Kamphuis | Round 1: Leenes, Robert - Kamphuis, Jasper | Four Knights Game: Scotch Variation Accepted | |
| Jan 1, 2026 | Lopes | 0–1 | Kamphuis | Chessfestival Groningen 2025 Open A | King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Rare Line | |
| Dec 28, 2025 | Kamphuis | 0–1 | Dordevic | Round 8: Kamphuis, Jasper - Dordevic, Tom | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| Dec 26, 2025 | Kamphuis | 0–1 | De Boer | Round 6: Kamphuis, Jasper - De Boer, Eelke | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| Dec 26, 2025 | Kamphuis | 1–0 | Blok | Chessfestival Groningen 2025 Open A | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| Dec 24, 2025 | Wempe | 1–0 | Kamphuis | Round 5: Wempe, Joost - Kamphuis, Jasper | Indian Defense: Przepiorka Variation | |
| Dec 24, 2025 | Kamphuis | 0–1 | Jin | Round 4: Kamphuis, Jasper - Jin, Yueheng | Scotch Game: Scotch Gambit, Advance Variation | |
| Dec 23, 2025 | Van Assendelft | 0–1 | Kamphuis | Round 3: Van Assendelft, Floris - Kamphuis, Jasper | Ruy Lopez: Morphy Defense, Norwegian Variation | |
| Dec 21, 2025 | Shyaam Nikhil P | 1–0 | Kamphuis | Round 1: Shyaam Nikhil P - Kamphuis, Jasper | Vienna Game: Mengarini Variation | |
| Oct 25, 2025 | Bakija | 0–1 | Kamphuis | Round 9: Bakija, Alan - Kamphuis, Jasper | Van Geet Opening: Napoleon Attack | |
| Oct 24, 2025 | Kamphuis | 0–1 | Makhynia | Round 8: Kamphuis, Jasper - Makhynia, Kostiantyn | Sicilian Defense: Four Knights Variation, Cobra Variation | |
| Oct 23, 2025 | Schuricht | 1–0 | Kamphuis | Round 7: Schuricht, Emil Frederick - Kamphuis, Jasper | King's Indian Defense: Orthodox Variation, Bayonet Attack | |
| Oct 22, 2025 | Kamphuis | 1–0 | Winter | Round 6: Kamphuis, Jasper - Winter, Sven | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Oct 21, 2025 | De Boer | ½–½ | Kamphuis | Round 5: De Boer, Eelke - Kamphuis, Jasper | King's Indian Defense: Semi-Averbakh System | |
| Oct 21, 2025 | Kamphuis | 1–0 | Struik | Round 4: Kamphuis, Jasper - Struik, Marcel | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Oct 20, 2025 | Westerlaan | 1–0 | Kamphuis | Round 3: Westerlaan, Sander - Kamphuis, Jasper | King's Indian Defense: Makogonov Variation | |
| Oct 19, 2025 | Kamphuis | 0–1 | Harshavardhan G B | Round 2: Kamphuis, Jasper - Harshavardhan G B | Scotch Game: Scotch Gambit, Kingside Variation | |
| Oct 18, 2025 | Nigmatov | 0–1 | Kamphuis | Round 1: Nigmatov, Ortik - Kamphuis, Jasper | Italian Game: Giuoco Pianissimo, Normal | |
| May 29, 2025 | Zhu | ½–½ | Kamphuis | Finals: Zhu, Chenwu - Kamphuis, Jasper | Ruy Lopez: Morphy Defense, Norwegian Variation | |
| May 29, 2025 | Kamphuis | 1–0 | Van de Griendt | Semi-Finals: Kamphuis, Jasper - Van de Griendt, Jan Willem | Italian Game: Paris Defense | |
| — | Kamphuis | 0–1 | Ronge | HZ University of Applied Sciences Chess Tournament | Italian Game: Scotch Gambit, Max Lange Attack | |
| — | Kamphuis | 0–1 | De Boer | HZ University of Applied Sciences Chess Tournament | Sicilian Defense: Classical Variation, Anti-Sozin Variation | |
| — | Lopez | 1–0 | Kamphuis | HZ University of Applied Sciences Chess Tournament | English Opening: King's English Variation | |