| Oct 25, 2025 | Gergin | 0–1 | Mellema | Round 9: Gergin, Isafara - Mellema, Andries | French Defense: Tarrasch Variation, Closed Variation | |
| Oct 24, 2025 | Mellema | 0–1 | Bakels | Round 8: Mellema, Andries - Bakels, Anton | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Oct 23, 2025 | Valiente | 1–0 | Mellema | Round 7: Valiente, Paulo - Mellema, Andries | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 | |
| Oct 22, 2025 | Mellema | 1–0 | Safin Safarullakhan | Round 6: Mellema, Andries - Safin Safarullakhan | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Oct 21, 2025 | Labruyere | 1–0 | Mellema | Round 4: Labruyere, Roger - Mellema, Andries | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Oct 20, 2025 | Mellema | ½–½ | Xu | Round 3: Mellema, Andries - Xu, Alex Z | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Oct 19, 2025 | Xue | 1–0 | Mellema | Round 2: Xue, Luka - Mellema, Andries | Benko Gambit Accepted: Fully Accepted Variation | |
| Oct 18, 2025 | Mellema | 0–1 | Makhynia | Round 1: Mellema, Andries - Makhynia, Kostiantyn | Sicilian Defense: Four Knights Variation | |
| Jun 1, 2025 | Lombaers | 1–0 | Mellema | Round 6: Lombaers, Peter - Mellema, Andries | Queen's Gambit Declined: Barmen Variation | |
| Jun 1, 2025 | Mellema | 1–0 | Ratsma | Round 5: Mellema, Andries - Ratsma, Midas | Italian Game: Classical Variation, Giuoco Pianissimo | |
| May 30, 2025 | Van den Doel | 1–0 | Mellema | Round 2: Van den Doel, Erik - Mellema, Andries | East Indian Defense | |
| Oct 23, 2023 | Mellema | 0–1 | Ernst | Hoogeveen Open 2023 | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Oct 22, 2023 | Fehr | 0–1 | Mellema | Hoogeveen Open 2023 | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 | |
| Oct 21, 2023 | Mellema | ½–½ | Nijdam | Hoogeveen Open 2023 | Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations | |
| May 28, 2023 | Mellema | * | Bex | Limburg Open | ? | |
| May 28, 2023 | Krause | * | Mellema | Limburg Open | ? | |
