Piano Sonata No. 12 (Mozart) - Form

Form

The sonata is in three movements and has a conventional structure:

1. Allegro - The first movement is in a classical sonata form.
2. Adagio - The second movement is a slow movement in the key of B flat major with two halves repeated. In the autograph, the second half is essentially a repeat of its initial presentation with some minor tonal adjustments. In the earliest printed editions, however, it is considerably elaborated.
3. Allegro assai - The rapid finale is in sonata form with a 6/8 time. While it starts out with a forte chord and passage work, it concludes with a pianissimo cadence.