'this transformation incorporates clear references to the theme's two opening motives, but its most distinctive feature is the descending octave followed immediately by the rising tenth, which is an outgrowth of m 8. the development section opens in a slower tempo, andante espressivo, with a nocturne-like setting of the main theme in A-flat major in 6/4 time. a much faster, passionato, transformation of the theme, with an important leap of a sixth and striking syncopationmm205-208 - brings the development to a close. rising sequences bring still greater intensity to this portion of the development. the coda contains yet another transformation mm 402-407 - of the main theme into an allegro molto march in 2/4 time.
even though the first movement was originally identified as a fantasy, it is in sonata-allegro form. the three-measure introduction to the Allegro affettuoso first movement is powerful and attention-getting; it is another with its roots clearly in beethoven's emperor concerto. a short, single statement of octave E's in the orchestra is followed by a forceful, rhythmically energetic chordal cascade in the piano, unaccompanied. this idea makes only one return, where it dominates the middle of the development section, bringing a sudden, shocking halt to the slower, expressive 6/4 section.'