<Ol> <Li> Allegro in </Li> <Li> Adagio (E ♭ major) in </Li> <Li> Allegretto in </Li> </Ol> <Li> Adagio (E ♭ major) in </Li> <P> A typical performance takes about 18 minutes . </P> <P> There is an accompanying violin part of doubtful origin in many 1800 editions; the piano part is exactly the same as for piano solo . Neue Mozart - Ausgabe (NMA) describe it as an addition by either Johann Anton André or Johann Mederitsch (de). </P>

Piano sonata no. 17 in b-flat major k. 570