Composed between 1779 and 1780. It consists of three movements.

First Movement

The first movement, in G major, is in 2/4 time with an Allegro con brio tempo. This movement is written in rondo form, not sonata form. The rondo theme is based on a descending melodic figure from the third scale degree to the tonic, and then from the sixth scale degree to the tonic. When it reappears, the initial four measures are re-presented once, and then repeated with rhythmic variations.

Second Movement

The second movement, Adagio, is in 3/4 time and in C major, the subdominant key of the first movement. In this 3/4 meter, the third beat often moves towards the first beat of the next measure. It is written in three-part form, with the third part expanding or varying the melodic figures of the first part. While the secondary theme of the first part is in G major, the secondary theme of the third part is in the tonic C major, suggesting that the tonal scheme, in a sense, adheres to the normative structure of sonata form. This is interesting, considering that the first movement of this piano sonata was not written in sonata form.

Third Movement

The third movement, Prestissimo, is in 6/8 time and in G major, the same key as the first movement. This movement is written in sonata form. The opening theme is accompanied by the left hand in thirds or octaves, playing a line interspersed with octaves. The second theme develops by swapping the roles of the left and right hands from the first theme. Because the first and second themes of this sonata movement are similar in nature, neither theme predominates in the development section (from m. 44). However, near the end of this development section, the first theme is pseudo-recapitulated in G minor, its parallel minor. Therefore, although this sonata movement does not feature a strong contrast between the first and second themes, it does not end up monotonous. In the recapitulation (from m. 79), the exposition is faithfully reproduced through transposition.