Classical · Advanced
Piano Sonata in B-flat major — Allegro
- Catalog
- K. 570
- Key
- B-flat major
- Year
- 1789
- Era
- Classical
- Form
- Sonata
- Instrumentation
- Solo Piano
- Difficulty
- Advanced
- License
- Public Domain
- Source
- IMSLP / Petrucci Music Library
Piano Sonata in B-flat major — Allegro by Wolfgang Amadeus Mozart, catalogued as K. 570, is a work for solo piano in B-flat major. Composed during the Classical era, it forms part of the composer's enduring contribution to the keyboard repertoire and is freely available in the public domain through archives such as IMSLP.
Wolfgang Amadeus Mozart wrote eighteen numbered piano sonatas, two dozen sets of variations, and a small constellation of fantasias and rondos that together define the Classical style at the keyboard. Clarity of texture, rhetorical wit, and singing line are the hallmarks of his writing for the fortepiano.
The work is suited to advanced-level pianists. As with all repertoire from this period, study editions vary; the public-domain engravings linked here are based on the most widely-circulated nineteenth- and early-twentieth-century editions and are sufficient for serious study, recital preparation, and recording.
About Wolfgang Amadeus Mozart
Wolfgang Amadeus Mozart wrote eighteen numbered piano sonatas, two dozen sets of variations, and a small constellation of fantasias and rondos that together define the Classical style at the keyboard. Clarity of texture, rhetorical wit, and singing line are the hallmarks of his writing for the fortepiano.
Key character — B-flat major
Stately, reflective, often nocturnal. Schubert's last sonata is a luminous example.
The Classical Era
The Classical era refined keyboard music around the new fortepiano, favoring balanced phrases, clear textures, and sonata-form drama. Mozart, Haydn, and the early Beethoven shaped a vocabulary of grace and rhetorical wit that still anchors the modern repertoire.
About the Sonata form
The sonata is the central architectural form of Classical and Romantic keyboard music: typically three or four contrasting movements built around the dramatic dialogue of sonata-allegro form. From C. P. E. Bach's first essays through Beethoven's 32, Schubert's last great cycle, and the Romantic single-movement experiments of Liszt and Scriabin, the sonata absorbs every major shift in keyboard thinking.