| Jun 28, 2026 | Kooijmans | 0–1 | Mazajchik | Round 5: Kooijmans, Jermo - Mazajchik, Tim | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Jun 28, 2026 | Mazajchik | ½–½ | Bagrationi | Round 4: Mazajchik, Tim - Bagrationi, Alexander | Caro-Kann Defense: Advance Variation | |
| Jun 27, 2026 | Kazi | * | Mazajchik | Round 1: Kazi, Zidan - Mazajchik, Tim | ? | |
| Apr 11, 2026 | Mazajchik | 0–1 | Maatman | Round 9: Mazajchik, Tim - Maatman, Nick | Caro-Kann Defense: Advance Variation | |
| Mar 28, 2026 | Lammens | 0–1 | Mazajchik | Round 6: Lammens, Tim - Mazajchik, Tim | Zukertort Opening: Reversed Grünfeld | |
| Mar 7, 2026 | Mazajchik | 0–1 | Fridman | Round 8: Mazajchik, Tim - Fridman, Daniel | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Feb 7, 2026 | Ootes | 1–0 | Mazajchik | Round 7: Ootes, Lars - Mazajchik, Tim | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Dec 26, 2025 | Mazajchik | 1–0 | Tjiam | Round 5: Mazajchik, Tim - Tjiam, Dharma | Pirc Defense: Austrian Attack, Weiss Variation | |
| Nov 22, 2025 | Peyrer | 1–0 | Mazajchik | Round 4: Peyrer, Konstantin - Mazajchik, Tim | Queen's Gambit Accepted: Normal Variation, Traditional System | |
| Nov 7, 2025 | Maerevoet | 0–1 | Mazajchik | KNSB competitie 2025/2026 | Queen's Gambit Accepted: Normal Variation, Traditional System | |
| Oct 23, 2025 | Hofman | ½–½ | Mazajchik | Round 5: Hofman, Marnix - Mazajchik, Tim | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Oct 19, 2025 | Can | ½–½ | Mazajchik | Round 1: Can, Emre - Mazajchik, Tim | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Oct 3, 2025 | Mazajchik | ½–½ | Kurt | Round 2: Mazajchik, Tim - Kurt, Sascha | Sicilian Defense: Chekhover Variation | |
| Sep 22, 2025 | Mazajchik | 0–1 | Sprangers | KNSB competitie 2025/2026 | Sicilian Defense: Chekhover Variation | |
