| Oct 5, 2025 | Sydykov | 1–0 | Haack | Deutsche Ländermeisterschaft 2025 | Caro-Kann Defense: Exchange Variation | |
| Oct 4, 2025 | Van Arendonk | 0–1 | Haack | Deutsche Ländermeisterschaft 2025 | French Defense: Exchange Variation | |
| Oct 3, 2025 | Haack | ½–½ | Sauer | Deutsche Ländermeisterschaft 2025 | Bogo-Indian Defense: Retreat Variation | |
| Oct 3, 2025 | Nunez Gregoire | 1–0 | Haack | Deutsche Ländermeisterschaft 2025 | Queen's Indian Defense: Kasparov-Petrosian Variation, Kasparov Attack | |
| Oct 2, 2025 | Haack | ½–½ | Farokhi | Deutsche Ländermeisterschaft 2025 | Catalan Opening: Closed | |
| Sep 29, 2025 | Besou | 1–0 | Haack | Deutsche Ländermeisterschaft 2025 | Queen's Indian Defense: Fianchetto Variation | |
| Sep 29, 2025 | Haack | 1–0 | Langer | Deutsche Ländermeisterschaft 2025 | English Opening: King's English Variation | |
| Jul 7, 2025 | Solodovnichenko | 1–0 | Haack | La Plagne 5th Edition July 2025 - Master tournament | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| Nov 24, 2024 | Haack | 1–0 | Aravindhan | Heusenstamm Sparkassen Open 2024 | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Nov 24, 2024 | Koellner | ½–½ | Haack | Heusenstamm Sparkassen Open 2024 | Trompowsky Attack | |
| Nov 23, 2024 | Haack | 0–1 | Noe | Heusenstamm Sparkassen Open 2024 | King's Indian Defense: Fianchetto Variation, Immediate Fianchetto | |
| Nov 23, 2024 | Longo | 0–1 | Haack | Heusenstamm Sparkassen Open 2024 | Indian Defense | |
| Nov 22, 2024 | Dordevic | 0–1 | Haack | Heusenstamm Sparkassen Open 2024 | Queen's Indian Defense: Fianchetto Variation | |
| Oct 31, 2024 | Harsh Suresh | ½–½ | Haack | Round 3: Harsh Suresh - Haack, Kevin | Caro-Kann Defense: Exchange Variation | |
| Oct 6, 2024 | Haack | 1–0 | Wunderlich | Deutsche Ländermeisterschaft 2024 | Catalan Opening: Closed | |
| Oct 5, 2024 | Haack | ½–½ | Lutz | Deutsche Ländermeisterschaft 2024 | Catalan Opening: Closed | |
| Oct 5, 2024 | Hinrichs | ½–½ | Haack | Deutsche Ländermeisterschaft 2024 | Semi-Slav Defense: Stoltz Variation | |
| Oct 4, 2024 | Haack | ½–½ | Ermitsch | Deutsche Ländermeisterschaft 2024 | King's Indian Defense: Fianchetto Variation, Classical Variation | |
| Oct 4, 2024 | Besou | 1–0 | Haack | Deutsche Ländermeisterschaft 2024 | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| Oct 3, 2024 | Haack | ½–½ | Haubold | Deutsche Ländermeisterschaft 2024 | King's Indian Defense: Fianchetto Variation, Panno Variation | |
| Oct 3, 2024 | Chassard | 0–1 | Haack | Deutsche Ländermeisterschaft 2024 | French Defense: Advance Variation, Euwe Variation | |
| Jul 28, 2024 | Haack | 1–0 | Heyder | Round 7: Haack, Kevin - Heyder, Florian | Queen's Gambit Declined | |
| Jul 27, 2024 | Zobel | 0–1 | Haack | Round 6: Zobel, Christian - Haack, Kevin | English Defense | |
| Jul 26, 2024 | Tiarks | 1–0 | Haack | Round 4: Tiarks, Jann-Christian - Haack, Kevin | French Defense: Exchange Variation | |
| Jul 25, 2024 | Matthaei | 1–0 | Haack | Round 2: Matthaei, Jakob - Haack, Kevin | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Jul 25, 2024 | Haack | 1–0 | Galje | Round 1: Haack, Kevin - Galje, Hans | Catalan Opening: Open Defense | |
| Jun 26, 2024 | Haack | 1–0 | Gasparyan | Round 6: Haack, Kevin - Gasparyan, Erik R. | Catalan Opening | |
| Jun 25, 2024 | Aizenberg | 1–0 | Haack | Round 5: Aizenberg, Benny - Haack, Kevin | French Defense: Advance Variation, Euwe Variation | |
| Jun 24, 2024 | Haack | 1–0 | Dotzer | Round 4: Haack, Kevin - Dotzer, Lukas | Catalan Opening: Closed | |
| Jun 22, 2024 | Sowinski | 1–0 | Haack | Round 2: Sowinski, Pawel - Haack, Kevin | French Defense: Advance Variation, Wade Variation | |
| May 25, 2024 | Bui | 0–1 | Haack | DEM U18 2024 | French Defense: Advance Variation, Wade Variation | |
| May 24, 2024 | Haack | ½–½ | Farokhi | DEM U18 2024 | English Opening: Agincourt Defense | |
| May 23, 2024 | Haack | 0–1 | Garner | DEM U18 2024 | Catalan Opening: Closed | |
| May 22, 2024 | Haack | ½–½ | Chassard | DEM U18 2024 | Queen's Gambit Declined: Three Knights, Vienna Variation | |
| May 22, 2024 | Petrovskyi | 1–0 | Haack | DEM U18 2024 | Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line | |
| May 21, 2024 | Bilovil | ½–½ | Haack | DEM U18 2024 | Queen's Pawn Game: London System | |
| May 20, 2024 | Haack | 1–0 | Sidletskyi | DEM U18 2024 | Catalan Opening: Closed | |
| May 19, 2024 | Haack | 1–0 | Vortmeier | DEM U18 2024 | King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Rare Line | |
| May 19, 2024 | Spriestersbach | 0–1 | Haack | DEM U18 2024 | King's Indian Attack: Spassky Variation | |
| Jun 11, 2022 | Hassemeier | ½–½ | Haack | DEM U18 2022 | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| Jun 10, 2022 | Haack | 0–1 | Leonard | DEM U18 2022 | Slav Defense: Exchange Variation | |
| Jun 9, 2022 | Müller | ½–½ | Haack | DEM U18 2022 | Queen's Gambit Declined | |
| Jun 8, 2022 | Haack | 1–0 | Dietlmeier | DEM U18 2022 | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| Jun 8, 2022 | Geltz | 1–0 | Haack | DEM U18 2022 | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Jun 7, 2022 | Haack | ½–½ | Weidemann | DEM U18 2022 | Sicilian Defense: Dragon Variation, Yugoslav Attack | |
| Jun 6, 2022 | Pubantz | * | Haack | DEM U18 2022 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jun 5, 2022 | Haack | * | Zackrisson | DEM U18 2022 | English Opening: Anglo-Indian Defense | |
| Jun 5, 2022 | Rohde | * | Haack | DEM U18 2022 | Sicilian Defense: Grand Prix Attack | |
| — | Haack | 0–1 | Perez Mitjans | Ronda 3: Haack, Kevin - Perez Mitjans, Orelvis | King's Indian Defense: Fianchetto Variation, Immediate Fianchetto | |
| — | Haack | 1–0 | Fernandez Diaz | Ronda 5: Haack, Kevin - Fernandez Diaz, Cristian | Catalan Opening: Closed | |
| — | Haack | 1–0 | Castillo Dalmau | Ronda 9: Haack, Kevin - Castillo Dalmau, Albert | Catalan Opening: Closed | |
| — | Manukyan | 1–0 | Haack | Ronda 6: Manukyan, Sargis A. - Haack, Kevin | Nimzo-Indian Defense: Sämisch Variation | |
| — | Peralta | 1–0 | Haack | Ronda 10: Peralta, Fernando - Haack, Kevin | Nimzo-Indian Defense: Normal Variation, Classical Defense | |