| Oct 5, 2025 | Farokhi | 1–0 | Matthaei | Deutsche Ländermeisterschaft 2025 | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Oct 4, 2025 | Matthaei | 0–1 | Atoyan | Deutsche Ländermeisterschaft 2025 | English Opening: Agincourt Defense | |
| Oct 3, 2025 | Matthaei | 1–0 | Van Arendonk | Deutsche Ländermeisterschaft 2025 | English Opening: Anglo-Indian Defense | |
| Oct 3, 2025 | Reyes Mantilla | 0–1 | Matthaei | Deutsche Ländermeisterschaft 2025 | Nimzo-Indian Defense: St. Petersburg Variation | |
| Oct 2, 2025 | Matthaei | 0–1 | Nunez Gregoire | Deutsche Ländermeisterschaft 2025 | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Oct 1, 2025 | Sheng | ½–½ | Matthaei | Deutsche Ländermeisterschaft 2025 | Italian Game: Giuoco Pianissimo, Normal | |
| Oct 1, 2025 | Matthaei | 0–1 | Schwarz | Deutsche Ländermeisterschaft 2025 | English Opening: Drill Variation | |
| Jul 28, 2024 | Wong | ½–½ | Matthaei | Round 7: Wong, Gengchun - Matthaei, Jakob | Ruy Lopez: Morphy Defense | |
| Jul 27, 2024 | Matthaei | ½–½ | Solberg | Round 6: Matthaei, Jakob - Solberg, Joachim | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Jul 27, 2024 | Wichmann | ½–½ | Matthaei | Round 5: Wichmann, Cliff - Matthaei, Jakob | Catalan Opening: Open Defense, Classical Line | |
| Jul 26, 2024 | Matthaei | 1–0 | Phenn | Round 4: Matthaei, Jakob - Phenn, Jan-Niklas | English Opening: King's English Variation | |
| Jul 26, 2024 | Hartge | 1–0 | Matthaei | Round 3: Hartge, Gedeon - Matthaei, Jakob | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Jul 25, 2024 | Matthaei | 1–0 | Haack | Round 2: Matthaei, Jakob - Haack, Kevin | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Jul 21, 2024 | Kracht | 0–1 | Matthaei | Round 9: Kracht, Raphael - Matthaei, Jakob | Italian Game: Classical Variation, Center Attack | |
| Jul 19, 2024 | Zimmermann | 1–0 | Matthaei | Round 7: Zimmermann, Rene, Dr. - Matthaei, Jakob | Indian Defense: Knights Variation | |
| Jul 18, 2024 | Helmer | ½–½ | Matthaei | Round 5: Helmer, Jan - Matthaei, Jakob | Catalan Opening: Open Defense, Classical Line | |
| Jul 18, 2024 | Matthaei | ½–½ | Ali Elier | Round 4: Matthaei, Jakob - Ali Elier | Ruy Lopez: Morphy Defense | |
| Aug 3, 2024 | Colpe | 1–0 | Matthaei | Round 5: Colpe, Malte - Matthaei, Jakob | Bogo-Indian Defense: Grünfeld Variation | |
| Aug 2, 2024 | Matthaei | 1–0 | Skabs | Round 4: Matthaei, Jakob - Skabs, Denis | English Opening: Agincourt Defense | |
| Aug 2, 2024 | Khachatryan | ½–½ | Matthaei | Round 3: Khachatryan, Taron - Matthaei, Jakob | Catalan Opening: Open Defense, Classical Line | |
| Aug 1, 2024 | Matthaei | ½–½ | Namyslo | Round 2: Matthaei, Jakob - Namyslo, Holger | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Aug 1, 2024 | Lochte | ½–½ | Matthaei | Round 1: Lochte, Thomas - Matthaei, Jakob | Danish Gambit Accepted | |
