Op. 2, Variations in B♭ major
Op. 10, 12 Etudes
Op. 11, Concerto in E minor
Op. 21, Concerto in F minor
Op. 22, Polonaise in E♭ major
Op. 24, 4 Mazurkas
Op. 25, 12 Etudes
Op. 26, 2 Polonaises
Op. 27, 2 Nocturnes
Op. 28, 24 Preludes
Op. 30, 4 Mazurkas
Op. 35, Sonata in B♭ minor
Op. 50, 3 Mazurkas
Op. 63, 3 Mazurkas
Op. 64, 3 Waltzes
Op. 28 No. 15, Prelude in D♭ major
In A one can see that Chopin was reducing the range of the accompanying figures in b. 11 and 17. In particular, he moved the bass note in the 2nd half of b. 11 an octave higher: 
, while in b. 17, which was initially identical to b. 15, he replaced both bass F notes with dyads in the middle register.
Compare the passage in the sources »
category imprint: Corrections & alterations; Source & stylistic information
issues: Corrections in A, Deletions in A, Accompaniment changes
notation: Pitch