Etude in A Minor, Op. 10, No. 2; Etude in Ab Major, Op. 10, No. 10; Etude in C Major, Op. 10, No. 1; Etude in C Major, Op. 10, No. 7; Etude in C Minor, Op. 10, No. 12 [Revolution]; Etude in C# Minor, Op. 10, No. 4; Etude in E Major, Op. 10, No. 3; Etude in Eb Major, Op. 10, No. 11; Etude in Eb Minor, Op. 10, No. 6; Etude in F Major, Op. 10, No. 8; Etude in F Minor, Op. 10, No. 9; Etude in Gb Major, Op. 10, No. 5; Etude in A Minor, Op. 25, No. 11; Etude in A Minor, Op. 25, No. 4; Etude in Ab Major, Op. 25, No. 1; Etude in C Minor, Op. 25, No. 12; Etude in C# Minor, Op. 25, No. 7; Etude in Db Major, Op. 25, No. 8; Etude in E Minor, Op. 25, No. 5; Etude in F Major, Op. 25, No. 3; Etude in F Minor, Op. 25, No. 2; Etude in Gb Major, Op. 25, No. 9; Etude in G# Minor, Op. 25, No. 6; Etude in B Minor, Op. 25, No. 10; Etude in Ab Major, KK IIb, No. 3, No. 2; Etude in Db Major, KK IIb, No. 3, No. 3 and Etude in F Minor, KK IIb, No.  3, No. 1.