| 24 jul 2026 | Schlais, Harald 2238 | Marentini, Marcel 2073 | ½-½ | B22 Defensa Siciliana: Alapin Variation | German Chess Championship 2026 | Seniors 65+ | 17 | Ver |
| 21 jul 2026 | Marentini, Marcel 2073 | Buchal, Stephan 2241 | 0-1 | A15 Apertura Inglesa: Anglo-Indian Defense, Anti-Anti-Grünfeld | German Chess Championship 2026 | Seniors 65+ | 22 | Ver |
| 19 jul 2026 | Marentini, Marcel 2073 | Buecker, Stefan 2250 | 0-1 | A04 Apertura Zukertort: Dutch Variation | German Chess Championship 2026 | Seniors 65+ | 81 | Ver |
| 7 oct 2025 | Bartonicek, Zdenek 2005 | Marentini, Marcel 2094 | 1-0 | A45 Defensa India: Accelerated London System | 47º Festival Scacchistico Internazionale Open Citta di Arco | A | 59 | Ver |