With the complete recording of Schubert's piano sonatas, Martin Helmchen is now dedicating himself to a new solo project that will consist of four double albums that will be released by 2028, the bicentenary of the composer's death. Martin Helmchen waited until he was 40 to embark on this adventure because, in his opinion, an artist needs maturity to feel the challenges presented by the radical contrasts in Schubert's sonatas: "constant yet never unnecessarily complex virtuosity juxtaposed with sober inwardness, the exuberant joy of the ländler and bouts of dramatic madness." Recording a complete work also meant carefully studying the scores and dealing with the question of which movements the composer left unfinished, whether one should stop at the point at which Schubert stopped composing because he felt that he could not finish them Schubert stopped composing because he either ran out of time or didn't have enough money to buy music paper? Helmchen has decided to complete these movements, inspired by the recordings and above all the analyses of the eminent pianist Paul Badura-Skoda. This first volume contains sonatas composed between 1815 (Schubert was 18) and 1825. The entire cycle was recorded on a Bösendorfer grand piano at the Kronberg Academy.