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b. 52

composition: Op. 21, Concerto in F minor, Mvt II

..

In A there are no accidentals before the 11th semiquaver (in both hands), as a result of which both here and two notes later one should read an a(1). Chopin's patent oversight was corrected in all editions.
A cautionary  before the 12th semiquaver – g(1) – is written in A only in the R.H. This inaccuracy was also corrected in the editions.

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration , GE revisions , Cautionary accidentals , Last key signature sign

b. 53-63

composition: Op. 21, Concerto in F minor, Mvt II

Accompaniment in FES, interpretation

Version of remaining sources

..

Harmonic accompaniment written into FES – see bars 45-52.

After selecting this version, it may be necessary to choose relevant versions also in bar 53 (slurs and accents), 53-54 (staccato signs), 5456-5757-6162 and 63 (slurs).

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , Annotations in FES , Authentic post-publication changes and variants

b. 54

composition: Op. 21, Concerto in F minor, Mvt II

..

In A (→GE1FE) there are cautionary flats before the 2nd demisemiquaver. The superfluous in this context signs were removed in EE and GE2.

category imprint: Differences between sources

issues: EE revisions , GE revisions , Cautionary accidentals

b. 55

composition: Op. 21, Concerto in F minor, Mvt II

..

In A the  before fis written at the pitch of b2-c3.

category imprint: Source & stylistic information

issues: Accidental below/above the note

b. 55

composition: Op. 21, Concerto in F minor, Mvt II

..

In A there are no naturals raising g1(2) to g1(2). It is undoubtedly an oversight, corrected already in GE (→FEEE).

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration , Errors of A , Authentic corrections of GE , Last key signature sign