| Jun 6, 2026 | Reuker | 1–0 | Pienski | Round 3: Reuker, Jari - Pienski, Olaf | English Opening: King's English Variation | |
| Jun 5, 2026 | Pienski | 0–1 | Stelmaszyk | Round 1: Pienski, Olaf - Stelmaszyk, Nico | Pirc Defense: Austrian Attack | |
| Jun 9, 2025 | Abasov | ½–½ | Pienski | Round 7: Abasov, Rustam, Dr. - Pienski, Olaf | French Defense: Exchange Variation, Svenonius Variation | |
| Jun 9, 2025 | Pienski | ½–½ | Meyer-Jany | Round 6: Pienski, Olaf - Meyer-Jany, Marcel | Caro-Kann Defense: Advance Variation, Short Variation | |
| Jun 8, 2025 | Menai | ½–½ | Pienski | Round 5: Menai, Nick - Pienski, Olaf | Sicilian Defense: Dragon Variation, Classical Variation, Battery Variation | |
| Jun 8, 2025 | Pienski | ½–½ | Ziegler | Round 4: Pienski, Olaf - Ziegler, Arndt Henning | Italian Game: Classical Variation, Greco Gambit, Traditional Line | |
| Jun 7, 2025 | Burkhardt | 1–0 | Pienski | Round 3: Burkhardt, Holger - Pienski, Olaf | French Defense: King's Indian Attack | |
| Jun 7, 2025 | Pienski | 1–0 | Dietrich | Round 2: Pienski, Olaf - Dietrich, Markus | Italian Game: Evans Gambit, Pierce Defense | |
| Jun 6, 2025 | Eick | 0–1 | Pienski | Round 1: Eick, Holger - Pienski, Olaf | Queen's Pawn Game | |
| May 25, 2025 | Buergener | 1–0 | Pienski | Round 5: Buergener, Richard - Pienski, Olaf | French Defense: Winawer Variation, Petrosian Variation | |
| May 25, 2025 | Pienski | 1–0 | Nuerenberg | Round 4: Pienski, Olaf - Nuerenberg, Marius | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| May 24, 2025 | Reimer | ½–½ | Pienski | Round 3: Reimer, Philip - Pienski, Olaf | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| May 24, 2025 | Pienski | 0–1 | Hampel | Round 2: Pienski, Olaf - Hampel, Felix | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
