| Jun 20, 2026 | Grooten | ½–½ | Midem | HSG Open 2026 A | English Opening: Neo-Catalan | |
| Jun 19, 2026 | Grooten | 0–1 | Grooten | HSG Open 2026 A | Zukertort Opening | |
| Jun 19, 2026 | Mullink | 0–1 | Grooten | HSG Open 2026 A | Sicilian Defense: Najdorf Variation | |
| May 24, 2026 | Grooten | 1–0 | Simenon | Round 8: Grooten, Tommy - Simenon, Jozef | Zukertort Opening: Queenside Fianchetto Variation | |
| May 23, 2026 | Grooten | 0–1 | Den Hartog | Round 5: Grooten, Tommy - Den Hartog, Marijn | Queen's Gambit Declined: Janowski Variation | |
| May 19, 2026 | Slagboom | 1–0 | Grooten | Round 13: Slagboom, Leandro - Grooten, Tommy | Sicilian Defense: Moscow Variation | |
| May 19, 2026 | Grooten | ½–½ | Bekker | Round 12: Grooten, Tommy - Bekker, Stefan | Indian Defense: London System | |
| May 19, 2026 | Ootes | 0–1 | Grooten | Round 11: Ootes, Lars - Grooten, Tommy | Queen's Gambit Declined: Semi-Tarrasch Defense, Main Line | |
| May 19, 2026 | Grooten | 0–1 | Pel | Round 10: Grooten, Tommy - Pel, Bonno | Zukertort Opening: Kingside Fianchetto | |
| May 19, 2026 | De Boer | 1–0 | Grooten | Round 9: De Boer, Eelke - Grooten, Tommy | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
| May 19, 2026 | Jellema | 0–1 | Grooten | Round 7: Jellema, Pieter - Grooten, Tommy | Indian Defense: Paleface Attack, Blackmar-Diemer Gambit Deferred | |
| May 19, 2026 | Grooten | 1–0 | Kamphuis | Round 6: Grooten, Tommy - Kamphuis, Jasper | Réti Opening: Advance Variation, Michel Gambit | |
| May 19, 2026 | Grooten | ½–½ | Terlouw | Round 4: Grooten, Tommy - Terlouw, Wouter | English Opening: Symmetrical Variation | |
| May 19, 2026 | Aravindhan | ½–½ | Grooten | Round 3: Aravindhan, Achyuth - Grooten, Tommy | Sicilian Defense: French Variation | |
| May 19, 2026 | Grooten | 0–1 | Van der Werf | Round 2: Grooten, Tommy - Van der Werf, Mark | Blumenfeld Countergambit Accepted | |
| May 19, 2026 | Grochal | 1–0 | Grooten | Round 1: Grochal, Joey - Grooten, Tommy | Benoni Defense: Classical Variation, New York Variation | |
| May 17, 2026 | Grooten | 1–0 | Martyr | Round 6: Grooten, Tommy - Martyr, Reginald | Dutch Defense: Hopton Attack | |
| May 15, 2026 | Krylov | ½–½ | Grooten | Round 1: Krylov, Philippe - Grooten, Tommy | Nimzo-Indian Defense: Kmoch Variation | |
| May 10, 2026 | Mostertman | ½–½ | Grooten | Ronde 6: Mostertman, Milan - Grooten, Tommy | Sicilian Defense: Najdorf Variation, English Attack | |
| May 10, 2026 | Grooten | ½–½ | Beerdsen | Ronde 5: Grooten, Tommy - Beerdsen, Thomas | King's Indian Attack: Keres Variation | |
| May 9, 2026 | Sourav Bhattacharjee | 0–1 | Grooten | Ronde 2: Sourav Bhattacharjee - Grooten, Tommy | Sicilian Defense: Najdorf Variation, English Attack | |
| May 8, 2026 | Grooten | 1–0 | Rex Van Dijken | Round 1: Grooten, Tommy - Rex Van Dijken | Dutch Defense: Leningrad Variation, Warsaw Variation | |
| May 6, 2026 | Ritzerveld | ½–½ | Grooten | Ronde 4: Ritzerveld, Noah - Grooten, Tommy | Sicilian Defense: Najdorf Variation, English Attack | |
| May 6, 2026 | Grooten | 1–0 | Lorelei Cornelisse | Ronde 3: Grooten, Tommy - Lorelei Cornelisse | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| May 2, 2026 | Grooten | 1–0 | Gudok | Round 9: Grooten, Tommy - Gudok, Viktor | King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense | |
| May 2, 2026 | Grooten | 0–1 | Van Batenburg | Round 8: Grooten, Tommy - Van Batenburg, Mees | Nimzo-Indian Defense: Kmoch Variation | |
| May 2, 2026 | Labruyere | ½–½ | Grooten | Round 7: Labruyere, Roger - Grooten, Tommy | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| May 2, 2026 | Grooten | 1–0 | Surkol | Round 6: Grooten, Tommy - Surkol, Hector | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 2, 2026 | Ferreira | 1–0 | Grooten | Round 5: Ferreira, Jorge Viterbo - Grooten, Tommy | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| May 2, 2026 | Grooten | 1–0 | Kshirsagar | Round 4: Grooten, Tommy - Kshirsagar, Pranav | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 2, 2026 | Wieringa | 0–1 | Grooten | Round 3: Wieringa, Helmer - Grooten, Tommy | Sicilian Defense: Closed | |
| May 2, 2026 | Grooten | 1–0 | Jong | Round 2: Grooten, Tommy - Jong, Casijn | Benoni Defense: Taimanov Variation | |
| May 2, 2026 | Cornelissen | 0–1 | Grooten | Round 1: Cornelissen, Jort - Grooten, Tommy | Sicilian Defense: Najdorf Variation | |
| Apr 30, 2026 | Grooten | 1–0 | Wierenga | Round 7: Grooten, Tommy - Wierenga, Luuk | King's Indian Attack, with Bf5 | |
| Apr 29, 2026 | De Jong | 1–0 | Grooten | Round 6: De Jong, Lode - Grooten, Tommy | Catalan Opening: Closed | |
| Apr 29, 2026 | Grooten | ½–½ | Teianu | Round 5: Grooten, Tommy - Teianu, Maxim | King's Indian Attack: Double Fianchetto | |
| Apr 27, 2026 | Kurt | 0–1 | Grooten | Round 4: Kurt, Sascha - Grooten, Tommy | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Apr 26, 2026 | Grooten | 1–0 | Okita | Round 3: Grooten, Tommy - Okita, Shinsaku | Queen's Pawn Game: London System | |
| Apr 25, 2026 | Roebers | ½–½ | Grooten | Round 2: Roebers, Bregje - Grooten, Tommy | Sicilian Defense: Moscow Variation | |
| Apr 12, 2026 | Grooten | 0–1 | Winter | Round 1: Grooten, Tommy - Winter, Sven | Queen's Indian Defense: Euwe Variation | |
| Apr 11, 2026 | Grooten | ½–½ | Ferreira | Round 9: Grooten, Tommy - Ferreira, Jorge Viterbo | King's Indian Attack: Keres Variation | |
| Mar 28, 2026 | Grooten | 1–0 | Boelhouwer | Round 6: Fier, Alexandr - Boelhouwer, Collin | King's Indian Attack: Yugoslav Variation | |
| Mar 8, 2026 | Grooten | 1–0 | Bijlsma | Meesterklasse | King's Indian Attack, with e6 | |
| Feb 22, 2026 | Håvard Haug | ½–½ | Grooten | Round 6: Håvard Haug - Grooten, Tommy | Queen's Pawn Game: Torre Attack, Grünfeld Variation, Main Line | |
| Feb 22, 2026 | Grooten | 1–0 | Mostertman | Round 5: Grooten, Tommy - Mostertman, Milan | English Opening: Neo-Catalan | |
| Feb 20, 2026 | Grooten | ½–½ | Pijpers | Round 3: Grooten, Tommy - Pijpers, Arthur | Grünfeld Defense: Exchange Variation, Modern Exchange Variation | |
| Feb 7, 2026 | Grooten | 1–0 | Labruyere | Round 7: Grooten, Tommy - Labruyere, Roger | Nimzo-Indian Defense: Kmoch Variation | |
| Dec 29, 2025 | Albers | 0–1 | Grooten | Round 9: Albers, Sasa - Grooten, Tommy | Sicilian Defense: Moscow Variation | |
| Dec 28, 2025 | Grooten | ½–½ | Elmi | Round 8: Grooten, Tommy - Elmi, Saad Abobaker | King's Indian Attack | |
| Dec 28, 2025 | Manafov | 1–0 | Grooten | Round 7: Manafov, Vugar - Grooten, Tommy | Indian Defense | |
| Dec 27, 2025 | Bakija | ½–½ | Grooten | Chessfestival Groningen 2025 Open A | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Dec 26, 2025 | Grooten | 1–0 | Grooten | Round 6: Grooten, Tommy - Grooten, Herman | Benoni Defense: Fianchetto Variation | |
| Dec 26, 2025 | Grooten | 1–0 | Ondersteijn | Round 5: Grooten, Tommy - Ondersteijn, Niels | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Dec 26, 2025 | Grooten | ½–½ | Kleibeuker | Chessfestival Groningen 2025 Open A | Catalan Opening: Open Defense, Classical Line | |
| Dec 24, 2025 | De Boer | 0–1 | Grooten | Round 5: De Boer, Eelke - Grooten, Tommy | Grünfeld Defense: Exchange Variation, Spassky Variation | |
| Dec 24, 2025 | Grooten | 1–0 | Labruyere | Round 4: Grooten, Tommy - Labruyere, Roger | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Dec 21, 2025 | Bernadskiy | 1–0 | Grooten | Round 1: Bernadskiy, Vitaliy - Grooten, Tommy | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| Nov 22, 2025 | Gallasch | 1–0 | Grooten | Round 4: Gallasch, Jonas - Grooten, Tommy | English Opening: Symmetrical Variation, Four Knights Variation | |
| Nov 7, 2025 | Grooten | 1–0 | Pijpers | KNSB competitie 2025/2026 | King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense | |
| Oct 25, 2025 | Grooten | 1–0 | De Jong | Round 9: Grooten, Tommy - De Jong, Lode | King's Indian Attack | |
| Oct 24, 2025 | De Jong | 1–0 | Grooten | Round 8: De Jong, Migchiel - Grooten, Tommy | Zukertort Opening | |
| Oct 23, 2025 | Grooten | 1–0 | Mostertman | Round 7: Grooten, Tommy - Mostertman, Milan | Catalan Opening: Closed | |
| Oct 22, 2025 | Li | ½–½ | Grooten | Round 6: Li, Hewei - Grooten, Tommy | King's Indian Attack: Symmetrical Defense | |
| Oct 21, 2025 | Van Batenburg | ½–½ | Grooten | Round 5: Van Batenburg, Mees - Grooten, Tommy | Sicilian Defense: Scheveningen Variation, Keres Attack | |
| Oct 21, 2025 | Grooten | ½–½ | Maris | Round 4: Grooten, Tommy - Maris, Ivo | English Opening: Symmetrical Variation, Hedgehog Defense | |
| Oct 20, 2025 | Grooten | 1–0 | Stefan | Round 3: Grooten, Tommy - Stefan, Iulia-Cristiana | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Oct 19, 2025 | Raja Harshit | 1–0 | Grooten | Round 2: Raja Harshit - Grooten, Tommy | Sicilian Defense: Najdorf Variation | |
| Oct 18, 2025 | Grooten | 1–0 | Struik | Round 1: Grooten, Tommy - Struik, Marcel | Semi-Slav Defense | |
| Oct 4, 2025 | Schoorl | ½–½ | Grooten | Round 2: Schoorl, Rob - Grooten, Tommy | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Sep 20, 2025 | Grooten | ½–½ | Geirnaert | Round 1: Grooten, Tommy - Geirnaert, Steven | Catalan Opening: Open Defense, Classical Line | |
| Sep 13, 2025 | Grooten | 0–1 | Schilstra | Round 11: Grooten, Tommy - Schilstra, Laurens | King's Indian Defense: Petrosian Variation, Normal Defense | |
| Sep 13, 2025 | Bosboom | 1–0 | Grooten | Round 10: Bosboom, Manuel - Grooten, Tommy | English Opening: Anglo-Indian Defense, King's Indian Formation | |
| Sep 13, 2025 | Grooten | 0–1 | Arthur De Winter | Round 9: Grooten, Tommy - Arthur De Winter | Queen's Gambit Declined: Janowski Variation | |
| Sep 13, 2025 | Erik Van Den Doel | 1–0 | Grooten | Round 8: Erik Van Den Doel - Grooten, Tommy | East Indian Defense | |
| Sep 13, 2025 | Grooten | 0–1 | Bok | Round 7: Grooten, Tommy - Bok, Benjamin | Nimzo-Indian Defense: Kmoch Variation | |
| Sep 13, 2025 | Vrolijk | 1–0 | Grooten | Round 6: Vrolijk, Liam - Grooten, Tommy | King's Indian Defense: Normal Variation, Rare Defenses | |
| Sep 13, 2025 | Grooten | 0–1 | Loek Van Wely | Round 5: Grooten, Tommy - Loek Van Wely | Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Kramnik's Line | |
| Sep 13, 2025 | Hing Ting Lai | 1–0 | Grooten | Round 4: Hing Ting Lai - Grooten, Tommy | Nimzo-Larsen Attack: Modern Variation | |
| Sep 13, 2025 | Grooten | 0–1 | Mees Van Batenburg | Round 3: Grooten, Tommy - Mees Van Batenburg | English Opening: Agincourt Defense | |
| Sep 13, 2025 | Grooten | ½–½ | Grooten | Round 1: Grooten, Herman - Grooten, Tommy | Slav Defense: Exchange Variation, Symmetrical Line | |
| Sep 8, 2025 | Schoorl | 1–0 | Grooten | Round 2: Schoorl, Rob - Grooten, Tommy | Queen's Indian Defense: Fianchetto Variation, Kramnik Variation | |
| Jul 30, 2025 | Van Kuijk | ½–½ | Grooten | Round 9: Van Kuijk, Vadim - Grooten, Tommy | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Jul 29, 2025 | Grooten | 1–0 | Gergin | Round 8: Grooten, Tommy - Gergin, Isafara | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jul 28, 2025 | Van den Berg | 1–0 | Grooten | Round 7: Van den Berg, Jeroen - Grooten, Tommy | Scandinavian Defense: Bronstein Variation | |
| Jul 27, 2025 | Grooten | 0–1 | Dordevic | Round 6: Grooten, Tommy - Dordevic, Tom | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| Jul 26, 2025 | Van Roon | ½–½ | Grooten | Round 5: Van Roon, Sjoerd - Grooten, Tommy | Sicilian Defense: Najdorf Variation, English Attack | |
| Jul 25, 2025 | De Wit | 0–1 | Grooten | Round 4: De Wit, Evan - Grooten, Tommy | English Opening | |
| Jul 24, 2025 | Grooten | ½–½ | Bruggink | Round 3: Grooten, Tommy - Bruggink, Tycho | Sicilian Defense: Najdorf Variation, Zagreb Variation | |
| Jul 23, 2025 | Grooten | ½–½ | Van t Hoff | Round 2: Grooten, Tommy - Van t Hoff, Tom | English Opening: Anglo-Indian Defense, Flohr-Mikenas-Carls Variation, Nei Gambit | |
| Jul 22, 2025 | De Boer | 1–0 | Grooten | Round 1: De Boer, Eelke - Grooten, Tommy | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Jun 1, 2025 | Schelvis | 0–1 | Grooten | Round 6: Schelvis, Richard - Grooten, Tommy | Slav Defense: Modern Line | |
| May 30, 2025 | Grooten | 0–1 | Ozbek | Round 1: Grooten, Tommy - Ozbek, Ahmet Naim | Nimzo-Indian Defense: Kmoch Variation | |
| May 18, 2025 | Van Doren | 0–1 | Grooten | Round 6: Van Doren, Bas - Grooten, Tommy | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| May 18, 2025 | Grooten | ½–½ | Terlouw | Round 5: Grooten, Tommy - Terlouw, Wouter | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| May 17, 2025 | Haitjema | 0–1 | Grooten | Round 4: Haitjema, Jarich - Grooten, Tommy | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| May 17, 2025 | Grooten | 1–0 | Darie | Round 3: Grooten, Tommy - Darie, Aden | English Opening: Agincourt Defense | |
| May 17, 2025 | Simons | ½–½ | Grooten | Round 2: Simons, Rudy - Grooten, Tommy | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| May 16, 2025 | Grooten | ½–½ | Geboers | Round 1: Grooten, Tommy - Geboers, Jimmy | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| May 2, 2025 | Grooten | 1–0 | Darie | Round 7: Grooten, Tommy - Darie, Aden | English Opening: Agincourt Defense | |
| May 1, 2025 | Kshirsagar | ½–½ | Grooten | Round 6: Kshirsagar, Pranav - Grooten, Tommy | Slav Defense | |