This friend of Nikolai Medtner wrote a set of 24 variations, of which the 18th is based on an inversion of the theme.
This composer was a close friend and admirer of the composer of the Night Wind piano sonata, which was dedicated to him, and helped that composer publish his book The Muse and the Fashion. The "Allegro ma non tanto" first movement of one of his concertos includes two versions of the cadenza, the original being called the ossia. Recent recordings of that concerto typically ignore the (*) cuts which this composer authorized to be made. This friend of Nikolai Medtner wrote a set of 24 variations, of which the 18th is based on an inversion of the theme. His large hands probably allowed him to easily play the bell-like opening piano chords of his second piano concerto. For 10 points, name this composer of four piano concertos as well as Rhapsody on a Theme of Paganini.
This composer was a close friend and admirer of the composer of the Night Wind piano sonata, which was dedicated to him, and helped that composer publish his book The Muse and the Fashion.
Sergei (Vasilievich) Rachmaninoff