useless trivia: What Word Means: Impressed?

Questions

One of Brahm's most difficult pieces is based on a theme by this composer who lived from 1782 to 1840. ?

This Chopin etude calls for extended chromatic runs executed by the last three fingers of the right hand. ?

Beethoven's piano sonatas were influenced by those of an earlier composer whose B-flat major sonat was the subject of a competition with Mozart. ?

In his G-minor sonata he instructs the player to begin "so schnell wie moglich" (as fast as possible). ?

What constitutes the surprise in Haydn's "Surprise Symphony" ?