| Jun 7, 2026 | Koch | 1–0 | Rick | Round 4: Koch, Yannick - Rick, Uwe | Slav Defense: Schlechter Variation | |
| Jun 6, 2026 | Holtwessels | 1–0 | Koch | Round 3: Holtwessels, Jan - Koch, Yannick | Sicilian Defense: O'Kelly Variation, Réti System | |
| Jan 5, 2026 | Aden | ½–½ | Koch | Runde 7: Aden, Tammo - Koch, Yannick | Bogo-Indian Defense: Nimzowitsch Variation | |
| Jan 4, 2026 | Koch | 1–0 | Aden | Runde 6: Koch, Yannick - Aden, Keno | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jan 4, 2026 | Stotyn | 1–0 | Koch | Runde 5: Stotyn, Fabian - Koch, Yannick | Caro-Kann Defense: Advance Variation, Van der Wiel Attack | |
| Jan 3, 2026 | Koch | 1–0 | Ismail | Runde 4: Koch, Yannick - Ismail, Nauras | Dutch Defense: Hopton Attack | |
| Jan 3, 2026 | Bangert | ½–½ | Koch | Runde 3: Bangert, Jonas - Koch, Yannick | Bogo-Indian Defense: Grünfeld Variation | |
| Jan 2, 2026 | Koch | 1–0 | Aden | Runde 2: Koch, Yannick - Aden, Meino | Slav Defense: Exchange Variation | |
| Jan 2, 2026 | Buergener | 0–1 | Koch | Runde 1: Buergener, Richard - Koch, Yannick | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Jul 19, 2025 | Fuhrmann | 1–0 | Koch | Round 5: Fuhrmann, Bahne - Koch, Yannick | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Jul 16, 2025 | Malek | ½–½ | Koch | Round 1: Malek, Daniel - Koch, Yannick | English Opening: Neo-Catalan | |
| May 25, 2025 | Weigand | 1–0 | Koch | Round 4: Weigand, Anton - Koch, Yannick | Caro-Kann Defense: Two Knights Attack | |
| May 24, 2025 | Koch | 1–0 | Bogomolow | Round 3: Koch, Yannick - Bogomolow, Sergej | King's Indian Defense: Sämisch Variation, Bobotsov-Korchnoi-Petrosian Variation | |
| May 24, 2025 | Meessen | ½–½ | Koch | Round 2: Meessen, Max - Koch, Yannick | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| May 23, 2025 | Koch | 1–0 | Kraas | Round 1: Koch, Yannick - Kraas, Hans-Joachim, Dr. | Old Indian Defense: Ukrainian Variation | |
| Jan 5, 2025 | Koch | ½–½ | Soellig | Round 7: Koch, Yannick - Soellig, Martin | Nimzo-Indian Defense: Normal Variation | |
| Jan 4, 2025 | Koch | 1–0 | Bangert | Round 6: Koch, Yannick - Bangert, Jonas | Nimzo-Indian Defense: Normal Variation | |
| Jan 4, 2025 | Nuerenberg | ½–½ | Koch | Round 5: Nuerenberg, Marius - Koch, Yannick | Sicilian Defense: Taimanov Variation | |
| Jan 3, 2025 | Koch | 0–1 | Thomas | Round 4: Koch, Yannick - Thomas, Jeremy | Queen's Gambit Declined: Queen's Knight Variation | |
| Jan 3, 2025 | Laubsch | 1–0 | Koch | Round 3: Laubsch, Bernd - Koch, Yannick | Caro-Kann Defense: Tartakower Variation | |
| Jan 2, 2025 | Koch | 1–0 | Harms | Round 1: Koch, Yannick - Harms, Friedjof | Benko Gambit Accepted: Pawn Return Variation | |
| Jan 2, 2025 | Direk | 0–1 | Koch | Round 2: Direk, Oguzhan - Koch, Yannick | Rapport-Jobava System | |
| Jul 28, 2024 | Kobs | * | Koch | Round 6: Kobs, Stephan - Koch, Yannick | ? | |
| Jul 28, 2024 | Koch | 1–0 | Meise | Round 7: Koch, Yannick - Meise, Jan | Slav Defense: Chebanenko Variation, Advance System | |
| Jul 27, 2024 | Koch | ½–½ | Schubert | Round 5: Koch, Yannick - Schubert, Matthias | Sicilian Defense: Moscow Variation, Main Line | |
| Jul 27, 2024 | Schoenrock | ½–½ | Koch | Round 4: Schoenrock, Ruediger - Koch, Yannick | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| Jul 26, 2024 | Koch | 0–1 | Alsleben | Round 3: Koch, Yannick - Alsleben, Moritz | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jul 26, 2024 | Koch | 1–0 | Tenne | Round 2: Koch, Yannick - Tenne, Fabian | ? | |
| Jul 25, 2024 | Miowitz | 1–0 | Koch | Round 1: Miowitz, Torsten - Koch, Yannick | Nimzo-Indian Defense: Kmoch Variation | |
| Jun 9, 2024 | Shalovylo | 0–1 | Koch | Round 5: Shalovylo, Matwij - Koch, Yannick | Nimzo-Indian Defense: Three Knights Variation | |
| Jun 9, 2024 | Koch | 0–1 | Wilmink | Round 4: Koch, Yannick - Wilmink, Anna | English Defense | |
| Jun 8, 2024 | Koch | 1–0 | Lattreuter | Round 3: Koch, Yannick - Lattreuter, Alexander | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jun 8, 2024 | Laubsch | ½–½ | Koch | Round 2: Laubsch, Bernd - Koch, Yannick | Caro-Kann Defense: Tartakower Variation | |
| Jun 7, 2024 | Koch | 1–0 | Ziegler | Round 1: Koch, Yannick - Ziegler, Martin | Queen's Gambit Declined: Marshall Defense | |
| Nov 17, 2024 | Koch | 1–0 | Cebulla | Halbfinale: Koch, Yannick - Cebulla, Konstantin | Queen's Gambit Declined: Charousek Variation | |
| Nov 17, 2024 | Koch | ½–½ | Mueer | Finale: Koch, Yannick - Mueer, Sebastian | Nimzo-Indian Defense: Rubinstein System | |
| Nov 16, 2024 | Castro Niemann | 0–1 | Koch | Viertelfinale: Castro Niemann, Quentin Jose - Koch, Yannick | Trompowsky Attack | |
| Aug 2, 2024 | Skabs | 1–0 | Koch | Round 3: Skabs, Denis - Koch, Yannick | Caro-Kann Defense: Two Knights Attack | |
| Aug 1, 2024 | Koch | 0–1 | Willim | Round 2: Koch, Yannick - Willim, Michael | Queen's Gambit Declined: Exchange Variation | |
| Jan 7, 2023 | Koch | 0–1 | Scheffner | Lower Saxony Championship | A | Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line | |
| Jan 7, 2023 | Schiller | 0–1 | Koch | Lower Saxony Championship | A | Zukertort Opening: Reversed Grünfeld | |
| Jan 5, 2023 | Koch | 0–1 | Lebiedz | Lower Saxony Championship | A | Nimzo-Indian Defense: Normal Variation | |
| Nov 13, 2022 | Koch | * | Mazatis | 25th Open Bavarian Championship | ? | |
| Nov 12, 2022 | Weyer | * | Koch | 25th Open Bavarian Championship | ? | |
| Nov 11, 2022 | Koch | 0–1 | Heppert | 25th Open Bavarian Championship | ? | |
| Nov 10, 2022 | Goormachtigh | 0–1 | Koch | 25th Open Bavarian Championship | ? | |
| Nov 9, 2022 | Koch | 1–0 | Heyartz | 25th Open Bavarian Championship | ? | |
| Nov 8, 2022 | Hammerl | 1–0 | Koch | 25th Open Bavarian Championship | ? | |
| Nov 7, 2022 | Koch | ½–½ | Koepke | 25th Open Bavarian Championship | King's Indian Defense: Sämisch Variation, Panno Formation | |
| Nov 6, 2022 | Koch | 1–0 | Edelmann | 25th Open Bavarian Championship | ? | |
| Nov 5, 2022 | Morawietz | 1–0 | Koch | 25th Open Bavarian Championship | Queen's Gambit Declined: Modern Variation | |
| Nov 7, 2021 | Troidl | * | Koch | 24th Open Bavarian Championship | ? | |
| Nov 6, 2021 | Koch | ½–½ | Otto | 24th Open Bavarian Championship | ? | |
| Nov 5, 2021 | Costa | 1–0 | Koch | 24th Open Bavarian Championship | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Nov 4, 2021 | Koch | 1–0 | Hertling | 24th Open Bavarian Championship | ? | |
| Nov 3, 2021 | Lerchl | 0–1 | Koch | 24th Open Bavarian Championship | ? | |
| Nov 2, 2021 | Koch | 1–0 | Ranker | 24th Open Bavarian Championship | ? | |
| Nov 1, 2021 | Duzy | 1–0 | Koch | 24th Open Bavarian Championship | ? | |
| Oct 31, 2021 | Koch | 1–0 | Haselbeck | 24th Open Bavarian Championship | ? | |
| Oct 30, 2021 | Morawietz | 1–0 | Koch | 24th Open Bavarian Championship | Queen's Indian Defense: Fianchetto Variation, Kramnik Variation | |