The first in a set of three pieces by this composer opens with an E-flat minor theme over triplet arpeggios, (10[1])followed by a restatement in the parallel major. Extremely slow interpretations of the first movement of a late piano sonata by this composer were popularized by Sviatoslav Richter, who switched from Bösendorfer to Steinway to record a fantasy by this composer that opens with thundering C major chords in a “long, short-short” rhythm. Brahms edited a set of “three piano pieces” by this composer initially intended to be a third set of four impromptus. This (-5[1])composer declared “the devil may play it” (10[1])in reference to his challenging Wanderer Fantasy. (10[1])For 10 points, name this (-5[1])German composer whose hundreds of Lieder include settings of Goethe in Gretchen at the Spinning Wheel and Der Erlkönig. ■END■ (10[2])