4."Fantasie" --impromptu in C sharp minor, op. 66, no. 4 "Fantasie" --impromptu in C sharp minor, op. 66, no. 4 Polonaise No. 1 in C sharp minor, op. 26 no. 1 Etude in C sharp minor, op. 10 no. 4 Etude in G sharp minor, op. 8, no. 9 Mazurkas in C sharp minor, op. 41 no. 4 Waltz in C sharp minor, op. 64 no. 2 1.Prelude in C sharp minor, op. 3 no. 2 8.Etude in D sharp minor, op. 8 no. 12 Etude in C sharp minor, op. 2 no. 1