| 26 ago 2026 | Vautrin, Stefan 2127 | Hartlieb, Juergen 2031 | ½-½ | E73 Defensa India de Rey: Normal Variation, Standard Development | 23. Rheinland-Pfalz Senioren Open | 17 | Ver |
| 25 ago 2026 | Hartlieb, Juergen 2031 | Broemel, Richard 2099 | ½-½ | B10 Defensa Caro-Kann: Two Knights Attack | 23. Rheinland-Pfalz Senioren Open | 9 | Ver |
| 22 ago 2026 | Babrikowski, Peter, Dr. 2179 | Hartlieb, Juergen 2031 | 1-0 | B40 Defensa Siciliana: Delayed Alapin Variation, with e6 | 23. Rheinland-Pfalz Senioren Open | 29 | Ver |
| 20 ago 2026 | Boidman, Yuri 2228 | Hartlieb, Juergen 2031 | 1-0 | B10 Defensa Caro-Kann: Accelerated Panov Attack, Modern Variation | 23. Rheinland-Pfalz Senioren Open | 59 | Ver |
| 22 jul 2026 | Hartlieb, Juergen 2033 | Wenner, Tobias 2144 | 0-1 | B11 Defensa Caro-Kann: Two Knights Attack, Mindeno Variation | German Chess Championship 2026 | Seniors 65+ | 40 | Ver |
| 7 jul 2026 | Hartlieb, Juergen 2033 | Knaak, Rainer 2381 | 0-1 | C47 Apertura de los Cuatro Caballos | German Chess Championship 2026 | Seniors 65+ | 46 | Ver |