Etude in G sharp minor op. 25 no. 6 Etude in G sharp minor op.25 no.6 Etude in C sharp minor op. 2 no. 1 Etude in C sharp minor op.25 no.7 Etude in C sharp minor, op. 2 no. 1 Etude in C sharp minor, op. 10 no. 4 Etude in G sharp minor, op. 8, no. 9 Etude in C sharp minor op. 10 no.4 Etude in C sharp minor, op. 2 No. 1 Etude in D sharp minor, op. 8 no. 12