| Game | Result | Opening | Date |
|---|---|---|---|
| Harff, Marcel (2403) – Schneider, Ilja (2531) | 0-1 | English Opening: Anglo-Indian Defense, Hedgehog System | 2026-07-26 |
| Harff, Marcel (2403) – Cofmann, Veaceslav (2389) | 1-0 | English Opening: King's English Variation, Adhiban Gambit | 2026-07-26 |
| Harff, Marcel (2403) – Windmueller, Simon (2155) | 1-0 | English Opening: Great Snake Variation | 2026-07-26 |
| Heider, Martin (2449) – Harff, Marcel (2403) | 1-0 | Nimzo-Larsen Attack: Classical Variation | 2026-07-26 |
| Hinrichs, Paul (2238) – Harff, Marcel (2403) | 1-0 | Catalan Opening: Open Defense | 2026-07-26 |
| Malinowsky, Levi (2325) – Harff, Marcel (2403) | 0-1 | French Defense: Horwitz Attack, Papa-Ticulat Gambit | 2026-07-26 |
| Harff, Marcel (2403) – Knuedel, Torben (2422) | 1-0 | English Opening: King's English Variation, Four Knights Variation, Quiet Line | 2026-07-26 |
| Harff, Marcel (2403) – Holinka, Henning (2374) | 1-0 | English Opening: Agincourt Defense | 2026-07-26 |
| Harff, Marcel (2403) – Parvanyan, Alfred (2239) | 1/2-1/2 | English Opening: Symmetrical Variation, Three Knights Variation | 2026-07-26 |
| Burkart, Patrick (2323) – Harff, Marcel (2403) | 0-1 | Queen's Indian Defense: Classical Variation, Traditional Variation, Main Line | 2026-07-26 |
| Freiberger, Jonas (2336) – Harff, Marcel (2403) | 1/2-1/2 | French Defense: La Bourdonnais Variation | 2026-07-26 |
| Hampel, Felix (2327) – Harff, Marcel (2403) | 0-1 | English Opening: King's English Variation, Three Knights System | 2026-07-26 |
| Harff, Marcel (2403) – Svane, Rasmus (2612) | 0-1 | English Opening: Agincourt Defense | 2026-07-26 |
| Harff, Marcel (2403) – Siedentopf, Daniel (2257) | 1-0 | English Opening: Symmetrical Variation | 2026-07-26 |
| Stefan,Dr. Wicklein – Harff, Marcel (2403) | 0-1 | Dutch Defense: Semi-Leningrad Variation | 2026-07-26 |
| Harff, Marcel (2403) – Sebastian Boehme | 1/2-1/2 | English Opening: Agincourt Defense | 2026-07-26 |
| Harff, Marcel (2403) – Feuerstack, Aljoscha (2475) | 1-0 | Réti Opening: Anglo-Slav Variation, Gurevich System | 2026-07-26 |
| Korchynskyi, Mykola (2415) – Harff, Marcel (2403) | 1-0 | Nimzo-Indian Defense: Classical Variation, Berlin Variation | 2026-07-26 |
| Christian Richter – Harff, Marcel (2403) | 0-1 | Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Nimzowitsch Attack | 2026-07-26 |
| Harff, Marcel (2403) – Wagner, Dennis (2467) | 0-1 | English Opening: King's English Variation, Four Knights Variation, Quiet Line | 2026-07-26 |
| Benjamin Wagner – Harff, Marcel (2403) | 0-1 | French Defense: Winawer Variation, Delayed Exchange Variation | 2026-07-26 |
| Harff, Marcel (2403) – Zwahr, Paul (2311) | 0-1 | English Opening: Agincourt Defense | 2026-07-26 |
| Boehme, Markus (2212) – Harff, Marcel (2403) | 0-1 | French Defense: Advance Variation, Euwe Variation | 2026-07-26 |
| Martin Hartmann – Harff, Marcel (2403) | 0-1 | French Defense: Advance Variation, Euwe Variation | 2026-07-26 |
| Harff, Marcel (2403) – Andre Becker | 1-0 | English Opening | 2026-07-26 |
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