Horn Concerto No. 2 in E major, K. 417 (1783) Horn Concerto No. 3 in E major, K. 447 (c. 1784–7) Horn Concerto No. 4 in E major, K. 495 (1786) There are some other unfinished Mozart works for horn and orchestra: Horn Concerto, K. 370b+371 in E major (1781) Horn Concerto, K. 494a in E major (c. 1785–6) Woodwind concertos Bassoon Concerto in B major, K. 191 (1774) Concerto for Flute, Harp, and Orchestra in C major, K. 299 (1778) Oboe Concerto in C major, K. 314 (1777–78) (has come down to us as the second flute concerto, but was almost certainly an oboe concerto) Flute Concerto No. 1 in G major, K. 313 (1778) Flute Concerto No. 2 in D major, K. 314 (1778) (an arrangement of the above Oboe Concerto) Andante for flute and orchestra in C major, K. 315/285e (1778) Clarinet Concerto in A major, K. 622 (1791; originally was for basset horn and was in the key of G major) Bassoon Concerto in B major, K. 230a/Anh. C 14.03 (Discovered in set of parts in The Hague attributed to Mozart; authenticity widely doubted from start. Most likely composed by François Devienne) Oboe Concerto in E major, K.Anh.C 14.06 (Doubtful authenticity) Others Basset Horn Concerto in G major, K. 584b (fragment; transcribed and finished to the well-known clarinet concerto) Concertante symphonies Sinfonia Concertante for Violin, Viola and Orchestra in E major, K. 364 (1779) Sinfonia Concertante for Oboe, Clarinet, Horn, Bassoon and Orchestra in E major, K. 297b (Anh. 9 and later Anh. C 14.01) (probably spurious arrangement of lost Sinfonia Concertante for Flute, Oboe, Horn, Bassoon and Orchestra from 1778) These were not Mozart's only attempts at the genre; a few other fragmentary works were also composed around the same time, though not completed. Sinfonia Concertante for Violin, Viola, Cello and Orchestra in A major, K. 320e (Anh. 104) (c. 1779, fragment) Sinfonia Concertante for Piano, Violin and Orchestra in D major, K. 315f (Anh. 56) (1778, fragment) Other concertos Concerto for Trumpet, K. 47c (1768, lost) Cello Concerto, K. 206a (1775, lost) Piano music Mozart's earliest composition attempts begin with piano sonatas and other piano pieces, as this is the instrument on which his musical education took place. Almost everything that he wrote for piano was intended to be played by himself (or by his sister, also a proficient piano player). Examples of his