| Dec 24, 2025 | Schilstra | ½–½ | Van der Werf | Round 3: Schilstra, Laurens - Van der Werf, Joel | French Defense: Tarrasch Variation, Chistyakov Defense | |
| Dec 23, 2025 | Van der Werf | 1–0 | Noordenbos | Round 2: Van der Werf, Joel - Noordenbos, Daan | Ruy Lopez: Closed, Anti-Marshall | |
| Dec 16, 2025 | Van der Werf | 0–1 | Pijpers | Round 1: Van der Werf, Joel - Pijpers, Arthur | Sicilian Defense: Richter-Rauzer Variation | |
| Oct 25, 2025 | Van der Werf | 1–0 | Kazarian | Amsterdam Chess Open 2025 | Sicilian Defense: Najdorf Variation | |
| Oct 24, 2025 | Van der Werf | 0–1 | Grutter | Amsterdam Chess Open 2025 | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| May 18, 2025 | Grooten | 0–1 | Van der Werf | Round 6: Grooten, Herman - Van der Werf, Joel | Queen's Gambit Declined: Ragozin Defense, Alekhine Variation | |
| May 18, 2025 | Van der Werf | 1–0 | Ganeshram | Round 5: Van der Werf, Joel - Ganeshram, Nirupa | Sicilian Defense: Dragon Variation, Yugoslav Attack, Old Line | |
| May 17, 2025 | Kazarjan | ½–½ | Van der Werf | Round 3: Kazarjan, Gachatur - Van der Werf, Joel | Sicilian Defense: Lasker-Pelikan Variation | |
| May 17, 2025 | Van der Werf | ½–½ | Baselmans | Round 2: Van der Werf, Joel - Baselmans, Luuk | French Defense: Steinitz Variation, Boleslavsky Variation | |
| May 16, 2025 | Feijen | 0–1 | Van der Werf | Round 1: Feijen, Niels - Van der Werf, Joel | Sicilian Defense: Alapin Variation | |
| Jan 11, 2025 | Van der Werf | 0–1 | Sokhor | praha2025 | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Nov 1, 2024 | Bagrationi | 1–0 | Van der Werf | Amsterdam Chess Open 2024 | Queen's Gambit Declined: Ragozin Defense | |
| Aug 31, 2024 | Fernandez Sanjuan | ½–½ | Van der Werf | Round 9: Fernandez Sanjuan, Oscar - Van der Werf, Joel | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Aug 30, 2024 | Van der Werf | 1–0 | Staroszczyk | Round 8: Van der Werf, Joel - Staroszczyk, Mateusz | Philidor Defense: Lion Variation | |
| Aug 25, 2024 | Pontiroli | 0–1 | Van der Werf | Round 3: Pontiroli, Luca - Van der Werf, Joel | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Aug 10, 2024 | Van Delft | 1–0 | Van der Werf | Round 9: Van Delft, Merijn - Van der Werf, Joel | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Aug 4, 2024 | Tarigan | 1–0 | Van der Werf | Round 3: Tarigan, Gilbert Elroy - Van der Werf, Joel | Indian Defense: Anti-Nimzo-Indian | |
| Oct 3, 2022 | Kruckenhauser | * | Van der Werf | 37th European Club Cup | ? | |
| — | Van der Werf | 1–0 | Nothnagel | HZ University of Applied Sciences Chess Tournament | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| — | Van der Werf | 0–1 | Hausrath | HZ University of Applied Sciences Chess Tournament | Caro-Kann Defense: Two Knights Attack | |
| — | Van der Werf | ½–½ | Ritzerveld | HZ University of Applied Sciences Chess Tournament | Ruy Lopez: Closed, Martinez Variation | |
| — | Van der Werf | 1–0 | Ferreira | Sala 2 - Masters | Sicilian Defense: Najdorf Variation, Adams Attack | |
| — | Van der Werf | 0–1 | Khusenkhojaev | Sala 2 - Masters | Queen's Gambit Declined: Exchange Variation, Reshevsky Variation | |
| — | Van der Werf | ½–½ | Shoshin | Sala 2 - Masters | Queen's Gambit Accepted: Alekhine Defense | |
| — | Van der Werf | 1–0 | Reinecke | Maia Stremears(1-9) | Réti Opening | |
| — | Van der Werf | ½–½ | Matos | Maia Streamers | French Defense: Rubinstein Variation, Fort Knox Variation | |
| — | Van der Werf | 0–1 | Ternault | Sala 2 - Masters | Nimzowitsch Defense: Williams Variation | |
| — | Van der Werf | ½–½ | Grana Castanal | Sala 2 - Masters | Sicilian Defense: Lasker-Pelikan Variation | |
| — | L'Ami | ½–½ | Van der Werf | HZ University of Applied Sciences Chess Tournament | English Opening: Neo-Catalan | |
| — | Leenhouts | 1–0 | Van der Werf | HZ University of Applied Sciences Chess Tournament | Trompowsky Attack | |
| — | Frutuoso | * | Van der Werf | Sala 2 - Masters | French Defense: Steinitz Variation, Boleslavsky Variation | |
| — | Fidalgo | 1–0 | Van der Werf | Sala 2 - Masters | English Opening: Neo-Catalan | |
| — | Auvray | 0–1 | Van der Werf | Sala 2 - Masters | French Defense: Advance Variation, Euwe Variation | |
| — | Witte | 0–1 | Van der Werf | Maia Stremears(1-9) | Rapport-Jobava System | |
| — | Kavutskiy | 1–0 | Van der Werf | Maia Streamers | English Opening: King's English Variation, Two Knights Variation, Smyslov System | |
| — | Fernandez | 0–1 | Van der Werf | Maia Streamers | Nimzo-Indian Defense: Sämisch Variation | |
| — | Kazarian | 1–0 | Van der Werf | Maia Streamers | French Defense: Exchange Variation, Monte Carlo Variation | |
| — | Torres | ½–½ | Van der Werf | Sala 2 - Masters | Catalan Opening | |