| Jun 7, 2026 | Harms | 0–1 | Kroeze | Round 5: Harms, Friedjof - Kroeze, Frank | Caro-Kann Defense: Exchange Variation | |
| Oct 25, 2025 | Harms | 1–0 | Yurii Shalovylo | Runde 7: Harms, Friedjof - Yurii Shalovylo | Sicilian Defense: Closed | |
| Oct 25, 2025 | Buergener | ½–½ | Harms | Runde 6: Buergener, Richard - Harms, Friedjof | Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | |
| Oct 25, 2025 | Tegetmeier | ½–½ | Harms | Runde 5: Tegetmeier, Birger - Harms, Friedjof | Ruy Lopez: Morphy Defense, Classical Defense Deferred | |
| Oct 24, 2025 | Harms | ½–½ | Huhs | Runde 4: Harms, Friedjof - Huhs, Sven | Scandinavian Defense: Portuguese Gambit, Banker Variation | |
| Oct 24, 2025 | Serhii Yaryna | ½–½ | Harms | Runde 3: Serhii Yaryna - Harms, Friedjof | Benko Gambit | |
| Oct 23, 2025 | Harms | ½–½ | Oest | Runde 2: Harms, Friedjof - Oest, Thorsten | Sicilian Defense: Closed | |
| Oct 23, 2025 | Thomas | 1–0 | Harms | Runde 1: Thomas, Jeremy - Harms, Friedjof | Four Knights Game: Scotch Variation Accepted | |
| Jul 13, 2025 | Harms | 1–0 | Wahono | Round 7: Harms, Friedjof - Wahono, Richard | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jul 12, 2025 | Sviridov | 1–0 | Harms | Round 6: Sviridov, Vitaliy - Harms, Friedjof | Indian Defense | |
| Jul 12, 2025 | Bangert | 1–0 | Harms | Round 5: Bangert, Jonas - Harms, Friedjof | Benko Gambit Accepted: Fully Accepted Variation | |
| Jul 11, 2025 | Harms | 1–0 | Klebsch | Round 4: Harms, Friedjof - Klebsch, Tobias | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Jul 11, 2025 | Stukemeier | ½–½ | Harms | Round 3: Stukemeier, Ralf - Harms, Friedjof | Italian Game: Classical Variation, Greco Gambit, Moeller-Bayonet Attack | |
| Jul 10, 2025 | Bruehe | 0–1 | Harms | Round 1: Bruehe, Martin - Harms, Friedjof | Italian Game: Giuoco Piano | |
| Jul 6, 2025 | Harms | 0–1 | Stotyn | Round 2: Harms, Friedjof - Stotyn, Fabian | French Defense: Hecht-Reefschläger Variation | |
| May 25, 2025 | Jaeger | 1–0 | Harms | Round 5: Jaeger, Uwe, Dr. - Harms, Friedjof | Ponziani Opening: Jaenisch Counterattack | |
| May 25, 2025 | Harms | 0–1 | Mimkes | Round 4: Harms, Friedjof - Mimkes, Antal | Sicilian Defense: Closed | |
| May 24, 2025 | Wusterack | ½–½ | Harms | Round 3: Wusterack, Paul - Harms, Friedjof | Zukertort Opening: Quiet System | |
| May 23, 2025 | Harms | ½–½ | von Mettenheim | Round 1: Harms, Friedjof - von Mettenheim, Johannes | Italian Game: Classical Variation | |
| Jan 5, 2025 | Direk | 1–0 | Harms | Round 7: Direk, Oguzhan - Harms, Friedjof | Rapport-Jobava System | |
| Jan 4, 2025 | Harms | ½–½ | Beckmann | Round 6: Harms, Friedjof - Beckmann, Jonathan | Sicilian Defense: Closed | |
| Jan 4, 2025 | Lieb | ½–½ | Harms | Round 5: Lieb, Max - Harms, Friedjof | Benko Gambit | |
| Jan 3, 2025 | Harms | 0–1 | Holtwessels | Round 4: Harms, Friedjof - Holtwessels, Jan | Nimzowitsch Defense: Scandinavian Variation, Advance Variation | |
| Jan 3, 2025 | Ludwig | ½–½ | Harms | Round 3: Ludwig, Bernard, Dr. - Harms, Friedjof | English Opening: Anglo-Indian Defense, Anti-Anti-Grünfeld | |
| Jan 2, 2025 | Harms | ½–½ | Rieping | Round 2: Harms, Friedjof - Rieping, Lea | Scandinavian Defense: Main Line, Mieses Variation | |
| Jan 2, 2025 | Koch | 1–0 | Harms | Round 1: Koch, Yannick - Harms, Friedjof | Benko Gambit Accepted: Pawn Return Variation | |
| Dec 29, 2024 | Harms | 0–1 | Tarasenko | Round 6: Harms, Friedjof - Tarasenko, Nazar | Sicilian Defense: Closed | |
| Jun 9, 2024 | Hart | ½–½ | Harms | Round 5: Hart, Martin - Harms, Friedjof | King's Gambit Accepted: Cunningham Defense, McCormick Defense | |
| Jun 9, 2024 | Kraeft | ½–½ | Harms | Round 4: Kraeft, Tom - Harms, Friedjof | Scotch Game: Potter Variation | |
| Jun 8, 2024 | Harms | 0–1 | Kroeze | Round 3: Harms, Friedjof - Kroeze, Frank | Caro-Kann Defense: Exchange Variation | |
| Jun 8, 2024 | Martin | 1–0 | Harms | Round 2: Martin, Dennis - Harms, Friedjof | English Opening: Symmetrical Variation, Anti-Benoni Variation | |
| Jun 7, 2024 | Harms | 0–1 | Bode | Round 1: Harms, Friedjof - Bode, Wilfried | Bishop's Opening: Berlin Defense | |
| Dec 27, 2024 | Harms | 0–1 | von Estorff | Round 2: Harms, Friedjof - von Estorff, Jacob | Sicilian Defense: Grand Prix Attack | |
| Nov 17, 2024 | Harms | 0–1 | Zhang | Round 4: Harms, Friedjof - Zhang, Onno | Sicilian Defense: Closed | |
| Nov 17, 2024 | Poelig | ½–½ | Harms | Round 5: Poelig, Juergen - Harms, Friedjof | King's Indian Attack: Wahls Defense | |
| Nov 16, 2024 | Harms | 1–0 | Wibmer | Round 2: Harms, Friedjof - Wibmer, Michael | Sicilian Defense: Grand Prix Attack | |
| Nov 16, 2024 | Nguyen | 1–0 | Harms | Round 3: Nguyen, Phuc Nhat - Harms, Friedjof | Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | |
| Nov 15, 2024 | Lichtmannecker | 1–0 | Harms | Round 1: Lichtmannecker, Daniel - Harms, Friedjof | Ruy Lopez: Morphy Defense, Classical Defense Deferred | |