| 23 jul 2026 | Scheuermann, Bernhard 2128 | Buecker, Stefan 2250 | 0-1 | C45 Apertura Escocesa: Potter Variation | German Chess Championship 2026 | Seniors 65+ | 31 | Ver |
| 22 jul 2026 | Buecker, Stefan 2250 | Kaliski, Erwin 2151 | 1-0 | A03 Apertura Bird: Dutch Variation | German Chess Championship 2026 | Seniors 65+ | 53 | Ver |
| 21 jul 2026 | Namyslo, Holger 2033 | Buecker, Stefan 2250 | 0-1 | C22 Apertura del Centro: Berger Variation | German Chess Championship 2026 | Seniors 65+ | 78 | 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 |
| 18 jul 2026 | Buecker, Stefan 2250 | Schmid, Hartmut 2022 | 1-0 | A03 Apertura Bird: Dutch Variation | German Chess Championship 2026 | Seniors 65+ | 34 | Ver |
| 7 jul 2026 | Buecker, Stefan 2250 | Knaak, Rainer 2381 | 0-1 | A00 Apertura Polaca: Baltic Defense | German Chess Championship 2026 | Seniors 65+ | 37 | Ver |
| 7 jul 2026 | Buecker, Stefan 2250 | Rudolf, Matthias, Dr. 2085 | 0-1 | A03 Apertura Bird: Dutch Variation | German Chess Championship 2026 | Seniors 65+ | 31 | Ver |
| 5 abr 2026 | Ginsburg, Gennadi 2408 | Buecker, Stefan 2254 | 1-0 | C70 Apertura Española (Ruy López): Morphy Defense, Schliemann Defense Deferred | Grenke Chess Festival 2026 Open | 67 | Ver |
| 4 abr 2026 | Krishna C R G 2399 | Buecker, Stefan 2254 | 1-0 | A80 Defensa Holandesa | Grenke Chess Festival 2026 Open | 42 | Ver |
| 3 abr 2026 | Paltrinieri, Nicholas 2414 | Buecker, Stefan 2254 | 1-0 | C29 Apertura Vienesa: Vienna Gambit, Paulsen Attack | Grenke Chess Festival 2026 Open | 47 | Ver |