Sonatas, duos and fantasies by Franz Schubert include all works for solo piano by Franz Schubert, except separate dances.
Twenty-four extant sonatas and sonata fragments are listed in the 1978 version of the Deutsch catalogue: There are also some possibly lost piano sonatas: Piano compositions that possibly were intended as piano sonata movements: These works are by all accounts complete and have always been taken as such: The works listed below are considered complete or incomplete, depending on source: They can be divided into the following categories: For the piano Sonatas, there is no uniform numbering system.
There are several reasons for this, including that there is no consensus regarding the inclusion of independent movements as being part of incomplete or unfinished sonatas.
This issue has proven to be troubling to scholars and performers of the works, who have to decide which of these movements, if any at all, should be included for a certain sonata.
A common numbering system, found on recordings and some websites has 21 sonatas:[3] The following two editions of Schubert's piano sonatas are incomplete and abstain from providing a numbering system: The following edition of Schubert's piano sonatas is complete, but abstains from providing a numbering system: In addition to the numbering systems found in the above named editions, one more can be cited.