The work was introduced in the catalog of Mozart's works on October 27, 1788 as Piano, Violin and Cello Tertet, the piano score being copied by the hand of a copist. Mozart wrote the violin and cello parts above and below the piano score, also bringing some corrections to the latter. Due to this fact, Otto Jahn and other scholars consider that initially this Trio was composed as a sonata for the solo piano, which Mozart transformed it into a piano trio in 1788. This theory is also supported by the structure of the work, which holds the tripartite form of the sonata genre: Part I - Allegro - Sonata form, Part II - Andante - theme with variations, Part III - Allegretto - rondo form.