| Nov 23, 2025 | Hassemeier | 0–1 | Forster | Round 9: Hassemeier, Mika - Forster, Lukas | Grünfeld Defense: Exchange Variation, Nadanian Attack | |
| Nov 23, 2025 | Cubukcu | 0–1 | Hassemeier | Round 8: Cubukcu, Mete - Hassemeier, Mika | Caro-Kann Defense: Panov Attack, Fianchetto Defense, Fianchetto Gambit | |
| Nov 23, 2025 | Hassemeier | 0–1 | Bartelt | Round 7: Hassemeier, Mika - Bartelt, Max Peter | King's Indian Defense: Makogonov Variation | |
| Nov 23, 2025 | Buyukasik | 1–0 | Hassemeier | Round 6: Buyukasik, Diyap - Hassemeier, Mika | King's Indian Attack | |
| Nov 23, 2025 | Niermann | 0–1 | Hassemeier | Round 5: Niermann, Tristan - Hassemeier, Mika | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Nov 23, 2025 | Hassemeier | 1–0 | Scheftlein | Round 4: Hassemeier, Mika - Scheftlein, Richard | Nimzo-Indian Defense: Classical Variation | |
| Nov 23, 2025 | Hassemeier | 1–0 | Wusterack | Round 3: Hassemeier, Mika - Wusterack, Paul | King's Indian Defense: Makogonov Variation | |
| Nov 23, 2025 | Dvorsky | ½–½ | Hassemeier | Round 2: Dvorsky, Radovan - Hassemeier, Mika | Caro-Kann Defense | |
| Nov 23, 2025 | Hassemeier | 1–0 | Anish H S | Round 1: Hassemeier, Mika - Anish H S | Queen's Gambit Declined: Marshall Defense | |
| Nov 22, 2025 | Kopylov | 1–0 | Hassemeier | Round 9: Kopylov, Daniel - Hassemeier, Mika | Caro-Kann Defense: Gurgenidze System | |
| Nov 22, 2025 | Hassemeier | 1–0 | Sieber | Round 8: Hassemeier, Mika - Sieber, Fiona | Queen's Indian Accelerated | |
| Nov 22, 2025 | Modler | 0–1 | Hassemeier | Round 7: Modler, Andreas, Dr. - Hassemeier, Mika | Queen's Gambit Declined: Three Knights Variation | |
| Nov 22, 2025 | Hassemeier | 0–1 | Degenhard | Round 6: Hassemeier, Mika - Degenhard, Simon | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Nov 22, 2025 | Scheftlein | 0–1 | Hassemeier | Round 5: Scheftlein, Richard - Hassemeier, Mika | Nimzo-Indian Defense: Classical Variation | |
| Nov 22, 2025 | Hassemeier | ½–½ | Schulze | Round 4: Hassemeier, Mika - Schulze, Lara | Nimzo-Indian Defense: Classical Variation | |
| Nov 22, 2025 | Dobrikov | 0–1 | Hassemeier | Round 3: Dobrikov, Marco - Hassemeier, Mika | Nimzo-Larsen Attack: Indian Variation | |
| Nov 22, 2025 | Hassemeier | 1–0 | Luetkemeier | Round 2: Hassemeier, Mika - Luetkemeier, Timo | Queen's Gambit Accepted: Central Variation, Greco Variation | |
| Nov 22, 2025 | Schlereth | 0–1 | Hassemeier | Round 1: Schlereth, Maximilian - Hassemeier, Mika | Catalan Opening: Open Defense, Classical Line | |
| May 30, 2023 | Hassemeier | ½–½ | Stoettner | 2nd Laim Pfingst Open | King's Indian Defense: Kramer Variation | |
| May 30, 2023 | Boehme | 1–0 | Hassemeier | 2nd Laim Pfingst Open | Indian Defense | |
| May 28, 2023 | Senthil Maran K | 1–0 | Hassemeier | 2nd Laim Pfingst Open | Catalan Opening: Closed | |
| May 27, 2023 | Hassemeier | 0–1 | Bharath Subramaniyam H | 2nd Laim Pfingst Open | Old Indian Defense: Janowski Variation, Main Line | |
| Jul 28, 2022 | Kokoszczynski | 1–0 | Hassemeier | open-a | English Opening: Mikenas-Carls Variation | |
| Jul 26, 2022 | Nguyen | ½–½ | Hassemeier | open-a | Queen's Gambit Declined: Three Knights, Vienna Variation | |
| Jul 24, 2022 | Malek | 1–0 | Hassemeier | open-a | Sicilian Defense: Moscow Variation, Sokolsky Variation | |
| Jul 22, 2022 | Akesson | 1–0 | Hassemeier | open-a | Nimzo-Indian Defense: Normal Variation | |
| Jun 11, 2022 | Hassemeier | ½–½ | Haack | DEM U18 2022 | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| Jun 10, 2022 | Hassemeier | ½–½ | Weihrauch | DEM U18 2022 | Sicilian Defense: Closed | |
| Jun 9, 2022 | Dietlmeier | 0–1 | Hassemeier | DEM U18 2022 | Caro-Kann Defense | |
| Jun 8, 2022 | Hassemeier | 0–1 | Musiolik | DEM U18 2022 | King's Indian Defense: Makogonov Variation | |
| Jun 8, 2022 | Bornholdt | 0–1 | Hassemeier | DEM U18 2022 | Queen's Indian Defense: Kasparov Variation | |
| Jun 7, 2022 | Weishäutel | 1–0 | Hassemeier | DEM U18 2022 | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Jun 6, 2022 | Hassemeier | ½–½ | Geltz | DEM U18 2022 | Queen's Gambit Declined: Janowski Variation | |
| Jun 5, 2022 | Hassemeier | * | Chen | DEM U18 2022 | Sicilian Defense: Najdorf Variation | |
| Jun 5, 2022 | Fromm | 1–0 | Hassemeier | DEM U18 2022 | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Jun 27, 2021 | Hassemeier | 1–0 | Weidemann | DVM U16 2020 | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Jun 26, 2021 | Weishäutel | ½–½ | Hassemeier | DVM U16 2020 | Caro-Kann Defense: Gurgenidze System | |
| Jun 26, 2021 | Wang | 1–0 | Hassemeier | DVM U16 2020 | Modern Defense: Kotov Variation | |
| Jun 25, 2021 | Hassemeier | ½–½ | Yi | DVM U16 2021 | Scotch Game: Classical Variation | |
| Jun 25, 2021 | Hassemeier | ½–½ | Sulayev | DVM U16 2021 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jun 24, 2021 | Hassemeier | 1–0 | Mooser | DVM U16 2021 | ? | |
| Jun 24, 2021 | Burgtorf | 0–1 | Hassemeier | DVM U16 2021 | Nimzo-Indian Defense: Classical Variation, Berlin Variation | |