| 24 jul 2026 | Kannenberg, Karl-Heinz 2074 | Heck, Norbert 2210 | 0-1 | A48 Apertura de Peón de Dama: Barry Attack | German Chess Championship 2026 | Seniors 65+ | 51 | Ver |
| 20 jul 2026 | Kannenberg, Karl-Heinz 2074 | Brueggemann, Joachim 2244 | 0-1 | A46 Defensa India: London System | German Chess Championship 2026 | Seniors 65+ | 23 | Ver |
| 7 jul 2026 | Knaak, Rainer 2381 | Kannenberg, Karl-Heinz 2074 | ½-½ | D15 Defensa Eslava: Geller Gambit | German Chess Championship 2026 | Seniors 65+ | 60 | Ver |
| 27 sep 2025 | Kannenberg, Karl-Heinz 2125 | Matzat, Andre 2041 | 1-0 | D19 Defensa Eslava: Czech Variation, Dutch Variation | German Senior Team Championship of the State Associations | S65 | 55 | Ver |
| 25 sep 2025 | Carstens, Andreas 2101 | Kannenberg, Karl-Heinz 2125 | ½-½ | B10 Defensa Caro-Kann: Breyer Variation | German Senior Team Championship of the State Associations | S65 | 20 | Ver |
| 24 sep 2025 | Kannenberg, Karl-Heinz 2125 | Schneider, Bernd 2165 | 0-1 | B08 Defensa Pirc: Classical Variation, Quiet System | German Senior Team Championship of the State Associations | S65 | 37 | Ver |
| 23 sep 2025 | Kannenberg, Karl-Heinz 2125 | Postler, Reinhard 2193 | ½-½ | D02 Apertura de Peón de Dama: London System, with e6 | German Senior Team Championship of the State Associations | S65 | 15 | Ver |
| 22 sep 2025 | Negele, Michael, Dr. 2205 | Kannenberg, Karl-Heinz 2125 | 0-1 | B10 Defensa Caro-Kann: Goldman Variation | German Senior Team Championship of the State Associations | S65 | 38 | Ver |
| 21 sep 2025 | Kannenberg, Karl-Heinz 2125 | Kuhne, Detlev 2068 | ½-½ | D02 Apertura de Peón de Dama: London System | German Senior Team Championship of the State Associations | S65 | 52 | Ver |