Piano Sonata No.6 in A major, Op. 82

The first movement introduces the main motto, where the melody is played in minor thirds and parallel major thirds. This makes the movement tonally unstable, since both A major and A minor are established. Also, the motto is accompanied by a rising and falling augmented 4th between notes A and D#, creating sharp dissonances. Thus, it already introduces the uncertainty of the work. The greater part of it is dominated by grinding dissonances and frequent modulation, further increasing the despair of the work. Throughout most of the piece, there is a lack of key signature.