| Jul 24, 2026 | Smit | 0–1 | Boersma | Round 4: Smit, Emeline - Boersma, Jan | English Opening: Great Snake Variation | |
| Jul 23, 2026 | Boersma | 1–0 | Kompaan | Round 3: Boersma, Jan - Kompaan, Rick | Sicilian Defense: Closed | |
| Jul 22, 2026 | Seip | ½–½ | Boersma | Round 2: Seip, Rien - Boersma, Jan | King's Indian Defense: Orthodox Variation | |
| Jul 21, 2026 | Boersma | 1–0 | Ngangbam | Round 1: Boersma, Jan - Ngangbam, Chingthang | Sicilian Defense: Closed, Traditional | |
| Dec 29, 2025 | Boersma | ½–½ | Van Putten | Round 5: Boersma, Jan - Van Putten, Henk | Sicilian Defense: Closed | |
| Dec 27, 2025 | Vroombout | 0–1 | Boersma | Round 3: Vroombout, Enrico - Boersma, Jan | Sicilian Defense: Hyperaccelerated Fianchetto | |
| Dec 26, 2025 | Boersma | 1–0 | Sijpkens | Round 2: Boersma, Jan - Sijpkens, Michiel | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| Dec 3, 2025 | Ten Dam | 1–0 | Boersma | Round 4: Ten Dam, Bram - Boersma, Jan | Nimzo-Larsen Attack: Classical Variation | |
| Jul 30, 2025 | Boersma | ½–½ | Guillaumond | Round 9: Boersma, Jan - Guillaumond, Matthieu | Sicilian Defense: Closed, Traditional | |
| Jul 29, 2025 | Mika Kleibeuker | 1–0 | Boersma | Round 8: Mika Kleibeuker - Boersma, Jan | Benoni Defense: Hromádka System | |
| Jul 28, 2025 | Boersma | 1–0 | Hylarides | Round 7: Boersma, Jan - Hylarides, Charlie Ronald | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| Jul 27, 2025 | Ebels | ½–½ | Boersma | Round 6: Ebels, Theo - Boersma, Jan | Benoni Defense | |
| Jul 26, 2025 | Boersma | ½–½ | Haans | Round 5: Boersma, Jan - Haans, Kaz | Sicilian Defense: Closed | |
| Jul 25, 2025 | Asefi | 0–1 | Boersma | Round 4: Asefi, Zaheeruddeen - Boersma, Jan | Benoni Defense: Hromádka System | |
| Jul 24, 2025 | Boersma | 0–1 | Ghilon Etienne | Round 3: Boersma, Jan - Ghilon Etienne | Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation | |
| Jul 23, 2025 | Heijmans | 0–1 | Boersma | Round 2: Heijmans, Stan - Boersma, Jan | Zukertort Opening: Sicilian Invitation | |
| Jul 22, 2025 | Boersma | 1–0 | Van Ree | Round 1: Boersma, Jan - Van Ree, Thailo | Sicilian Defense: Closed, Traditional | |
| Oct 27, 2023 | Fehr | 1–0 | Boersma | Hoogeveen Open 2023 | Zukertort Opening: Kingside Fianchetto | |
| Oct 26, 2023 | Zecha | 1–0 | Boersma | Hoogeveen Open 2023 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Oct 25, 2023 | Boersma | ½–½ | Boeren | Hoogeveen Open 2023 | French Defense: MacCutcheon Variation, Wolf Gambit | |
| Oct 24, 2023 | Vogel | ½–½ | Boersma | Hoogeveen Open 2023 | Indian Defense: Przepiorka Variation | |
| Oct 23, 2023 | Boersma | 0–1 | Kett | Hoogeveen Open 2023 | Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation | |
| Oct 22, 2023 | De Winter | 1–0 | Boersma | Hoogeveen Open 2023 | Sicilian Defense: Hyperaccelerated Dragon | |
| Oct 21, 2023 | Boersma | ½–½ | Van Kooten | Hoogeveen Open 2023 | Sicilian Defense: Closed, Traditional | |