Rondo in F for 2 horns, 2 violins, viola and basso

Mozart called a small number of works for strings alone or for strings, horns, and one woodwind instrument Divertimento or Notturno. The number of movements varies from three to six. According to 18^th-century performance practice, these pieces required only one player per part, unlike serenades and cassations, which were usually performed with a full orchestra. The most famous works of this genre are Ein musikalischer Spaß, KV 522 (with 2 horns) and Eine kleine Nachtmusik, KV 525 (for strings), both written in Vienna. Musically, the three Divertimenti KV 136–138 are almost indistinguishable from the early String Quartets KV 155–160. KV 247, KV 287, and KV 334 form a distinct group of sextets with a highly virtuosic first violin part.