Issues : Annotations in FED

b. 50

composition: Op. 28 No. 17, Prelude in A♭ major

..

FE overlooked the  before the minim at the beginning of the bar (a2). The accidental was supplemented in EE, FED and FES.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , EE revisions , Errors in FE , Annotations in FED , Annotations in FES

b. 53

composition: Op. 28 No. 17, Prelude in A♭ major

 in FED, probable reading

in FED, possible reading

No indication in remaining sources

Our variant suggestion

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Chopin entered a dynamic marking into FED. It is most probably  although it could have been written down more than once (corrected). Alternatively, one can see  in it, which, however, seems less likely, both graphically and musically.

category imprint: Graphic ambiguousness; Differences between sources

issues: Annotations in teaching copies , Annotations in FED

b. 78

composition: Op. 28 No. 17, Prelude in A♭ major

g1 in chords in A (→FCGE), EE2 & FED

g1 in FE (→EE1)

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The missing  lowering g1 to g1 is an oversight of the engraver of FE (→EE1). It was corrected only just in EE2, probably on the basis of a comparison with GE1. A flat was also added in FED.

category imprint: Differences between sources

issues: Annotations in teaching copies , EE revisions , Errors in FE , Annotations in FED

b. 86

composition: Op. 28 No. 17, Prelude in A♭ major

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FED