Fragment (ends after the development on the dominant of B-flat minor) The entire movement revolves around the rhythm of the first bars, and there is an extensive use of trills, an element which forms part of the initial motive.
"[1] As is the case with other Schubert sonatas, the composer left the movement unfinished, breaking off at the beginning of the recapitulation after a substantial development section that modulates extensively.
Some pianists, however, such as András Schiff, have recorded the movement as Schubert left it, simply stopping where the manuscript ends.
The choice of key and the turbulent writing, unusual for Schubert, indicate an affinity and influence from Beethoven's "Appassionata" Sonata, Op.
While Schubert left only a completed sketch of this movement, the soprano line allows the harmony to be easily reconstructed.