| May 24, 2026 | Kamphuis | 0–1 | Jellema | Round 13: Kamphuis, Jasper - Jellema, Pieter | Caro-Kann Defense: Forgacs Variation | |
| May 24, 2026 | Jellema | 0–1 | Terlouw | Round 12: Jellema, Pieter - Terlouw, Wouter | Indian Defense: Accelerated London System | |
| May 24, 2026 | Van der Werf | ½–½ | Jellema | Round 11: Van der Werf, Mark - Jellema, Pieter | Dutch Defense: Classical Variation | |
| May 24, 2026 | Jellema | 0–1 | Slagboom | Round 10: Jellema, Pieter - Slagboom, Leandro | Indian Defense: Accelerated London System | |
| May 24, 2026 | Jellema | ½–½ | De Boer | Round 8: Jellema, Pieter - De Boer, Eelke | Indian Defense: London System | |
| May 24, 2026 | Ootes | 1–0 | Jellema | Round 9: Ootes, Lars - Jellema, Pieter | Caro-Kann Defense: Two Knights Attack | |
| May 23, 2026 | Jellema | 1–0 | Aravindhan | Round 5: Jellema, Pieter - Aravindhan, Achyuth | Queen's Pawn Game: London System | |
| May 23, 2026 | Den Hartog | 1–0 | Jellema | Round 6: Den Hartog, Marijn - Jellema, Pieter | Caro-Kann Defense: Endgame Variation | |
| May 23, 2026 | Grochal | 1–0 | Jellema | Round 4: Grochal, Joey - Jellema, Pieter | Dutch Defense: Normal Variation | |
| May 23, 2026 | Jellema | 0–1 | Bekker | Round 3: Jellema, Pieter - Bekker, Stefan | Paleface Attack | |
| May 23, 2026 | Pel | 0–1 | Jellema | Round 2: Pel, Bonno - Jellema, Pieter | Hungarian Opening: Dutch Defense | |
| May 23, 2026 | Jellema | ½–½ | Simenon | Round 1: Jellema, Pieter - Simenon, Jozef | Paleface Attack | |
| May 19, 2026 | Jellema | 0–1 | Grooten | Round 7: Jellema, Pieter - Grooten, Tommy | Indian Defense: Paleface Attack, Blackmar-Diemer Gambit Deferred | |
| Feb 20, 2026 | Håvard Haug | 1–0 | Jellema | Round 2: Håvard Haug - Jellema, Pieter | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| Oct 25, 2025 | Jellema | 0–1 | Zuferi | Amsterdam Chess Open 2025 | Queen's Pawn Game: London System | |
| Jul 13, 2024 | Jellema | 0–1 | Muha | EUG open blitz | Queen's Pawn Game: London System | |
| Jul 13, 2024 | Pribelszky | 0–1 | Jellema | EUG open blitz | Zukertort Opening: Dutch Variation | |
| Jul 13, 2024 | Farkas | 1–0 | Jellema | EUG open blitz | Caro-Kann Defense: Exchange Variation | |
| Jul 13, 2024 | Gharibyan | 1–0 | Jellema | EUG open blitz | Caro-Kann Defense: Exchange Variation | |
| Jul 13, 2024 | Veiga | 1–0 | Jellema | EUG open blitz | Caro-Kann Defense: Two Knights Attack | |
| Jul 12, 2024 | Jellema | 1–0 | Farkas | European University Team Championship Open | Indian Defense | |
| Jul 12, 2024 | Jellema | 0–1 | Gharibyan | European University Team Championship Open | Indian Defense | |
| Jul 12, 2024 | Budak | 0–1 | Jellema | European University Team Championship Open | Caro-Kann Defense | |
| Jul 11, 2024 | Jellema | 1–0 | Schiopu | European University Team Championship Open | Queen's Pawn Game: London System, with e6 | |
| Jul 11, 2024 | Leisch | 1–0 | Jellema | European University Team Championship Open | Dutch Defense: Classical Variation | |
| Jul 11, 2024 | Medve | 1–0 | Jellema | European University Team Championship Open | Dutch Defense: Krejcik Gambit | |
| Jul 10, 2024 | Jellema | 1–0 | Spanjer | European University Team Championship Open | Queen's Pawn Game: London System | |
| Jul 10, 2024 | Papp | ½–½ | Jellema | European University Team Championship Open | Dutch Defense: Classical Variation, Huisl Variation | |