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. 64 No 1, Waltz in D♭ major
Chopin did not pay special attention to cautionary flats before the e1 and g1 notes in bars 21 and 23. The first was written only in AIII, it was also added in GE2op (→#GE3op) and EEW1 (→EEW2). The second is present in the majority of the sources – it was overlooked only in AII and GE2Db (→GE3Db→GE4Db).
Compare the passage in the sources »
category imprint: Differences between sources; Corrections & alterations
issues: EE revisions, Chopin's hesitations, Errors in GE, GE revisions, Cautionary accidentals
notation: Pitch