| Nov 1, 2025 | Hovhannisyan | 1–0 | Kather | Runde 7: Hovhannisyan, Artur - Kather, Yannick | Sicilian Defense: Closed, Traditional | |
| Nov 1, 2025 | Kather | ½–½ | Tscheuschner | Runde 6: Kather, Yannick - Tscheuschner, Georg, Dr. | Sicilian Defense: Closed | |
| Nov 1, 2025 | Kather | 1–0 | Linde | Runde 5: Kather, Yannick - Linde, Wolfgang | ? | |
| Oct 31, 2025 | Wartenberg | 0–1 | Kather | Runde 4: Wartenberg, Alissa - Kather, Yannick | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Oct 31, 2025 | Kather | ½–½ | Herzwurm | Runde 3: Kather, Yannick - Herzwurm, Robert | French Defense: Advance Variation, Euwe Variation | |
| Oct 30, 2025 | Schoene | 1–0 | Kather | Runde 2: Schoene, Finn - Kather, Yannick | Rapport-Jobava System | |
| Oct 30, 2025 | Kather | 1–0 | de Vries | Runde 1: Kather, Yannick - de Vries, Carsten | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Gufeld Gambit | |
| Sep 2, 2025 | Motola | ½–½ | Kather | Quinto turno: Motola, Jacopo - Kather, Yannick | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Sep 1, 2025 | Kather | 0–1 | Brunello | Quarto turno: Kather, Yannick - Brunello, Sabino | Ruy Lopez: Closed, Worrall Attack, Castling Line | |
| May 31, 2025 | Kather | ½–½ | Lagunow | Round 5: Kather, Yannick - Lagunow, Alexander | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Oct 29, 2024 | Forchert | 1–0 | Kather | Round 4: Forchert, Martin - Kather, Yannick | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Oct 26, 2024 | Kather | 0–1 | Karthik Venkataraman | Round 1: Kather, Yannick - Karthik Venkataraman | French Defense: Winawer Variation, Delayed Exchange Variation | |
| May 25, 2024 | Kather | 1–0 | Skibbe | Round 4: Kather, Yannick - Skibbe, Willi | Petrov's Defense: Modern Attack, Center Variation | |
| Aug 31, 2024 | Schnaider | 1–0 | Kather | Round 1: Schnaider, Ilan - Kather, Yannick | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Mar 31, 2023 | Wheatley | * | Kather | Reykjavik Open | ? | |
| Mar 30, 2023 | Kather | 0–1 | Willow | Reykjavik Open 2023 | Sicilian Defense: Old Sicilian | |
| Mar 29, 2023 | Kather | 0–1 | Williams | Reykjavik Open 2023 | French Defense: Classical Variation, Delayed Exchange Variation | |
| Nov 21, 2021 | Kather | 1–0 | Ohler | Heusenstamm Sparkassen Open 2021 | Caro-Kann Defense: Tartakower Variation | |
| Nov 20, 2021 | Bethke | 1–0 | Kather | Heusenstamm Sparkassen Open 2021 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| — | Novosel | 0–1 | Kather | Terzo turno: Novosel, Lovro - Kather, Yannick | Queen's Pawn Game: Torre Attack, Grünfeld Variation | |
