Alkan's Opus 35 and Opus 39 are each sets of this many etudes.
One set of this many pieces includes a "Rondo of the Sylphs" and ends with an "Elegy in Memory of Liszt." A French composer's Symphony for Solo Piano is part of a published set of this many pieces, which culminates in "The Feast of Aesop." Sergei Lyapunov's Opus 11 has this many pieces, because it was intended as a companion piece for an earlier set of this many pieces. A Scriabin set of this many pieces ends with the most famous piece in D-sharp minor. A set of this many pieces ends with (*) "Harmonies du Soir" and "Chasse-Neige." Alkan's Opus 35 and Opus 39 are each sets of this many etudes. A published set of this many pieces concludes with an etude inspired by the November Uprising, nicknamed "Revolutionary." There are this many pieces in Liszt's Transcendental Etudes and in each of Chopin's Opus 10 and Opus 25 sets of etudes. For 10 points, name the number of pitches in a chromatic scale.
One set of this many pieces includes a "Rondo of the Sylphs" and ends with an "Elegy in Memory of Liszt."
12