What do you know about Mozart K 491?

Wolfgang Amadeus Mozart's Piano Concerto No. 23 in A major, K. 488 (originally K. 491), is a work in three movements, composed probably between 2 and 4 March 1786, and first performed on 2 April the same year in Vienna at a concert promoted by the composer's pupil Therese von Trattnern. According to the Neue Wiener Zeitung of 15 April 1786, the composer performed the solo part.

The work is scored for solo piano, two oboes, two bassoons, two horns and strings.

The concerto's key of A major is relatively rare for a Mozart piano concerto (he composed more in the key of C than in any other), and perhaps because of its brightness, the key was favored for his concert rondos.

The autograph manuscript shows that the concerto was originally in D major (Köchel's K. 491), then in D flat (Köchel's K. 491a) and finally in A (Köchel's K. 488).

The orchestra begins the concerto with a brief introduction in sonata form. The development section modulates briefly to A minor before returning to A major. The second movement is in ternary (ABA) form, and the third is a rondo in sonata form with a brief cadenza leading to the coda.