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. 38, Ballade in F major
Chopin omitted a 
lowering b2 to b
2 at the beginning of bar, and a 
restoring b1 in the 2nd half of bar. An oversight of both the alteration and its canceling may seem improbable but happened to Chopin a few times, e.g. in Etude in F minor, op. 25 no. 2, bar 56.
Compare the passage in the sources »
category imprint: Editorial revisions
issues: EE revisions, Omissions to cancel alteration, GE revisions, Omission of current key accidentals, Errors of A, Errors repeated in FE
notation: Pitch
