The sonata has three
movements:
I. Allegro inquieto The Allegro inquieto pays homage to and mocks the classical
sonata form. As the
tempo suggests, the tempo and rhythms are very nervous and suspenseful. The opening theme is mocking and harsh, and features many loud
cluster-like chords. The second theme is a slow, thoughtful theme that seems to wander both through various keys and harmonies, and motifs. This long section begins to slowly pick up and results in the tumultuous, extremely
chromatic and violent development. After reprising a portion of the slow section, a final quick, mocking fragment of the main theme is presented which ends in the only full statement of the key of the piece with a quiet, quick roll of the B major chord in the lowest possible registers of the piano. The music is labeled as being in the key of B major, and contains musical elements pointing to B as a home note in the vein of the classical sonata form: a first theme centered on B, a second theme whose iteration in the exposition is centered on A and whose iteration in the recapitulation is centered on B, and an ending that returns the tonal center to B and concludes the piece with a B major chord. However, this movement distinctively lacks the key signature of B major.
II. Andante caloroso The slow section is initially very beautiful, but seeping with sentimental emotion. Jaffé has pointed out that the opening theme is based on
Robert Schumann's Lied, 'Wehmut' ('Sadness', which appears in Schumann's
Liederkreis, Op. 39): the words to this translate "I can sometimes sing as if I were glad, yet secretly tears well and so free my heart. Nightingales... sing their song of longing from their dungeon's depth... everyone delights, yet no one feels the pain, the deep sorrow in the song." This opening theme quickly decays into an extremely chromatic section which sifts through various tonal centers, none of which seem familiar to the E that began the piece. After a clangorous, bell-like climax, the music slows and melts into the lush opening theme once more.
III. Precipitato The Precipitato finale, once described as "an explosive burst of
rock 'n' roll with a chromatic edge", is a
toccata in relentless septuple time which boldly affirms the key of the sonata through a more
diatonic harmonic language than found in the first movement. This is obvious from the very beginning, with simple B major
triads repeated over and over again. Despite a wide range of performance tempos chosen by different pianists, the effect is nevertheless imposing and exciting. The toccata culminates into a furious recapitulation of the main theme, taxing all ten fingers to the utmost, until the piece finally ends triumphantly in a thundering cascade of octaves. The precipitato of this sonata is regarded as technically highly demanding. ==References==