| Apr 11, 2026 | Willemze | 1–0 | Vandenbussche | Round 9: Willemze, Thomas - Vandenbussche, Thibaut | Philidor Defense: Exchange Variation | |
| Mar 28, 2026 | Willemze | ½–½ | Tiviakov | Round 6: Willemze, Thomas - Tiviakov, Sergei | French Defense: Rubinstein Variation | |
| Mar 8, 2026 | Willemze | 0–1 | Van der Stricht | KNSB competitie 2025/2026 | Sicilian Defense: Moscow Variation, Main Line | |
| Feb 7, 2026 | Van Roon | 1–0 | Willemze | Round 7: Van Roon, Sjoerd - Willemze, Thomas | Caro-Kann Defense: Karpov Variation, Modern Variation | |
| Dec 26, 2025 | Collin Boelhouwer | 0–1 | Willemze | Round 5: Colin Boelhouwer - Willemze, Thomas | Caro-Kann Defense: Exchange Variation | |
| Dec 12, 2025 | Willemze | ½–½ | Jaracz | 2. Bundesliga in Mülheim | Sicilian Defense: Moscow Variation, Main Line | |
| Nov 22, 2025 | Ten Hertog | 0–1 | Willemze | Round 4: Ten Hertog, Hugo - Willemze, Thomas | Zukertort Opening | |
| Nov 7, 2025 | Willemze | ½–½ | Van Delft | KNSB competitie 2025/2026 | Sicilian Defense: Moscow Variation, Main Line | |
| Oct 4, 2025 | Mainka | ½–½ | Willemze | Round 2: Mainka, Alwin - Willemze, Thomas | Caro-Kann Defense: Panov Attack, Fianchetto Defense | |
| Sep 20, 2025 | Willemze | ½–½ | Vrolijk | Round 1: Willemze, Thomas - Vrolijk, Liam | Four Knights Game: Spanish Variation, Rubinstein Variation Accepted | |
| May 13, 2025 | Willemze | 1–0 | Krylov | Round 9: Willemze, Thomas - Krylov, Philippe | Caro-Kann Defense: Exchange Variation | |
| Mar 8, 2025 | Maatman | 1–0 | Willemze | Round 7: Maatman, Nick - Willemze, Thomas | Caro-Kann Defense: Exchange Variation | |
| Feb 8, 2025 | Maerevoet | 1–0 | Willemze | Round 6: Maerevoet, Sim - Willemze, Thomas | Tarrasch Defense | |
| Nov 23, 2024 | Froeyman | ½–½ | Willemze | KNSB Meesterklasse 2024-2025 | Caro-Kann Defense: Tartakower Variation | |
| Oct 25, 2024 | Rendboe | 0–1 | Willemze | 39th European Chess Club Cup | Tarrasch Defense: Classical Variation, Advance Variation | |
| Oct 24, 2024 | Willemze | 1–0 | Pantzar | 39th European Chess Club Cup | Four Knights Game: Spanish Variation | |
| Oct 23, 2024 | Willemze | ½–½ | Nemeth | 39th European Chess Club Cup | Four Knights Game: Spanish Variation | |
| Oct 22, 2024 | Arnaudov | 0–1 | Willemze | 39th European Chess Club Cup | King's Indian Attack | |
| Oct 21, 2024 | Schoeneshoefer | 1–0 | Willemze | 39th European Chess Club Cup | Caro-Kann Defense: Exchange Variation | |
| Oct 15, 2024 | Willemze | ½–½ | Kerigan | Round 2: Willemze, Thomas - Kerigan, Demre | Four Knights Game: Spanish Variation, Classical Variation | |
| Sep 21, 2024 | Willemze | 1–0 | Van de Oudeweetering | Round 1: Willemze, Thomas - Van de Oudeweetering, Arthur | Four Knights Game: Spanish Variation, Nimzowitsch Variation | |
| Dec 14, 2024 | Elgersma | 1–0 | Willemze | Round 5: Elgersma, Onno - Willemze, Thomas | Caro-Kann Defense: Tartakower Variation | |
| Nov 9, 2024 | Leenhouts | 1–0 | Willemze | Round 3: Leenhouts, Koen - Willemze, Thomas | Queen's Gambit Declined | |
| Oct 20, 2024 | Willemze | 0–1 | Maghsoodloo | Round 1: Willemze, Thomas - Maghsoodloo, Parham | Sicilian Defense: Moscow Variation | |
| Oct 7, 2023 | Stoyanov | 0–1 | Willemze | European Chess Club Cup 2023 | Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch | |
| Oct 6, 2023 | Willemze | ½–½ | Hommerson | European Chess Club Cup 2023 | Four Knights Game: Spanish Variation, Classical Variation | |
| Oct 3, 2023 | Quaranta | 0–1 | Willemze | European Chess Club Cup 2023 | King's Indian Attack | |
| Oct 1, 2023 | Dahdah | ½–½ | Willemze | European Chess Club Cup 2023 | Caro-Kann Defense: Panov Attack, Fianchetto Defense | |
| Apr 3, 2023 | Melzner | 0–1 | Willemze | Reykjavik Open 2023 | English Opening: Agincourt Defense | |
| Apr 1, 2023 | Fier | 1–0 | Willemze | Reykjavik Open 2023 | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Mar 31, 2023 | Kristinsson | 0–1 | Willemze | Reykjavik Open | Queen's Pawn Game: Levitsky Attack | |
| Mar 30, 2023 | Willemze | 1–0 | Birkisson | Reykjavik Open 2023 | Sicilian Defense: Closed, Traditional | |
| Mar 30, 2023 | Ivanchuk | 1–0 | Willemze | Reykjavik Open 2023 | Caro-Kann Defense: Panov Attack, Fianchetto Defense | |
| Oct 9, 2022 | Willemze | 1–0 | Rozen | ECCC_22 | Four Knights Game: Spanish Variation | |
| Oct 7, 2022 | Bischoff | 1–0 | Willemze | ECCC_22 | Queen's Gambit Declined: Three Knights Variation | |
| Oct 4, 2022 | Nguyen | 1–0 | Willemze | ECCC_22 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Oct 3, 2022 | Connell | * | Willemze | 37th European Club Cup | ? | |
| — | Willemze | ½–½ | Dvirnyy | Reykjavik Open 2023 | Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation | |
