6 Variations in G minor on "Hélas, j'ai perdu mon amant", K. 360 (1781) Piano trios Piano Trio No. 1 in B-flat major (Divertimento), K. 254 (1776) Piano Trio No. 2 in G major, K. 496 (1786) Piano Trio No. 3 in B-flat major, K. 502 (1786) Piano Trio No. 4 in E major, K. 542 (1788) Piano Trio No. 5 in C major, K. 548 (1788) Piano Trio No. 6 in G major, K. 564 (1788) Others Piano Trio in D minor, K. 442 (1785–88; fragment, completed by M. Stadler) Piano Trio in B major, K.Anh. 51/501a (1786; fragment) Piano Trio in G major, K.Anh. 52/495a (1786; fragment) Piano quartets Piano Quartets (piano, violin, viola, cello): Piano Quartet No. 1 in G minor, K. 478 (1785) Piano Quartet No. 2 in E major, K. 493 (1786) Other chamber music with piano Quintet for Piano and Winds (piano, oboe, clarinet, horn, bassoon) in E major, K. 452 (1784) Trio for Clarinet, Viola and Piano in E major, "Kegelstatt", K. 498 (1786) Fragments Quintet for Piano and Winds (piano, oboe, clarinet, basset horn, bassoon) in B major, K. Anh. 54/452a (1784; fragment) Chamber music without piano String duos Duo for Violin and Viola No. 1 in G major, K. 423 (1783) Duo for Violin and Viola No. 2 in B major, K. 424 (1783) String trios Trio for 2 Violins and Cello in B major, K. 266/271f (1777) Divertimento for String Trio in E major, K. 563 (1788) Others Preludes and Fugues for Violin, Viola and Cello, K. 404a (1782) Trio for Violin, Viola and Cello in G major, K. Anh. 66/562e (1788, fragment) String quartets String Quartet No. 1 in G major, "Lodi", K. 80/73f (1770) Milanese Quartets, K. 155–160 (1772–1773) This cycle, in three movements, is interesting as far as these works can be considered precursors of the later—more complete—string quartets. String Quartet No. 2 in D major, K. 155/134a (1772) String Quartet No. 3 in G major, K. 156/134b (1772) String Quartet No. 4 in C major, K. 157 (1772–73) String Quartet No. 5 in F major, K. 158 (1772–73) String Quartet No. 6 in B major, K. 159 (1773) String Quartet No. 7 in E major, K. 160/159a (1773) Viennese Quartets, K. 168–173 (1773) Much more stylistically developed. In Vienna Mozart is believed to have heard the op. 17 and op. 20 quartets of Joseph Haydn, and