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. 21, Concerto in F minor, Mvt III
In A there is no 
lowering c1 to c
1. This patent oversight was corrected already in GE1 (→FE→EE, →GE2), perhaps by Chopin. Moreover, a cautionary 
before c1 was added in the next bar.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: Omission of current key accidentals, Errors of A, Authentic corrections of GE
notation: Pitch
