| Apr 4, 2026 | Diehl | 0–1 | Kaufhold | Runde 9: Diehl, Holger - Kaufhold, Jonas | Queen's Pawn Game: Colle System | |
| Apr 3, 2026 | Marco Albert | 1–0 | Diehl | Runde 7: Marco Albert - Diehl, Holger | Benko Gambit Accepted: Fully Accepted Variation | |
| Apr 2, 2026 | Diehl | ½–½ | Muckle | Runde 6: Diehl, Holger - Muckle, Richard | Queen's Pawn Game: Colle System | |
| Apr 2, 2026 | Louis | ½–½ | Diehl | Runde 5: Louis, Volker - Diehl, Holger | Dutch Defense: Classical Variation | |
| Mar 29, 2026 | Diehl | 0–1 | Feldmann | Runde 4: Diehl, Holger - Feldmann, Johannes | English Opening: King's English Variation | |
| Mar 29, 2026 | Lambert | ½–½ | Diehl | Runde 3: Lambert, Andreas - Diehl, Holger | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Mar 28, 2026 | Diehl | 0–1 | Roelle | Runde 2: Diehl, Holger - Roelle, Philipp | English Opening: King's English Variation, Closed System, Full Symmetry | |
| Mar 27, 2026 | Voelpel | 1–0 | Diehl | Runde 8: Voelpel, Robert - Diehl, Holger | Van Geet Opening | |
| Mar 27, 2026 | Agne | ½–½ | Diehl | Runde 1: Agne, Marcel - Diehl, Holger | Dutch Defense: Rubinstein Variation | |
| Apr 19, 2025 | Diehl | 0–1 | Junker | Runde 9: Diehl, Holger - Junker, Reiner | English Opening: Symmetrical Variation, Ultra-Symmetrical Variation | |
| Apr 18, 2025 | Diehl | 0–1 | Oleg Yakovenko | Runde 7: Diehl, Holger - Oleg Yakovenko | English Opening: King's English Variation | |
| Apr 18, 2025 | Syrov | 1–0 | Diehl | Runde 8: Syrov, Arkadi - Diehl, Holger | French Defense: Advance Variation, Paulsen Attack | |
| Apr 17, 2025 | Roelle | 0–1 | Diehl | Runde 5: Roelle, Philipp - Diehl, Holger | English Opening: Agincourt Defense | |
| Apr 17, 2025 | Ahad Hüseynov | 1–0 | Diehl | Runde 6: Ahad Hüseynov - Diehl, Holger | French Defense: King's Indian Attack | |
| Apr 13, 2025 | Diehl | ½–½ | Weller | Runde 4: Diehl, Holger - Weller, Manuel | Yusupov-Rubinstein System | |
| Apr 13, 2025 | Commercon | ½–½ | Diehl | Runde 3: Commercon, Simon - Diehl, Holger | French Defense: Tarrasch Variation, Closed Variation, Main Line | |
| Apr 12, 2025 | Diehl | 0–1 | Ollenberger | Runde 2: Diehl, Holger - Ollenberger, Roland | English Opening | |
| Apr 11, 2025 | Bold | 1–0 | Diehl | Runde 1: Bold, Andre - Diehl, Holger | Dutch Defense: Classical Variation | |
