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 I
In A there is no accidental before the 2nd crotchet of the middle voice. It is certainly an oversight – d2 was already at the beginning of the 2nd half of the previous bar, suggesting a modulation to E major (the suggestion is even clearer in an analogous phrase in bars 275-276). The naturals are explicitly present in the four remaining similar places (bars 40, 48, 136 and 284). The sign was added already in GE1 (→FE→EE, →GE2), perhaps as a result of Chopin's intervention.
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, Last key signature sign
notation: Pitch