Piano concerto

... another arrangement - is it Mozart or is it Grieg? I was listening to the radio and heard Mozart's piano sonata in C (Sonata facile or Sonata semplice, No 16) with the second piano part written by Grieg. The result is not exactly Mozart, but interesting. I thought that if I arranged Grieg's second piano for orchestra, that would make a new piano concerto by Mozart (sort of).
As a student Grieg listened to a lot of Mozart’s music, and spent the winter of 1876/7 arranging four of Mozart’s nineteen piano sonatas for two pianos by adding his own, newly composed second piano part. He didn't change the original Mozart sonatas, he just added to them.
When I get round to it, I will publish the score, but you can hear rough mock-ups of the Concerto semplice by clicking on the pictures below.