Issues : Inaccuracies in FE

b. 15

composition: Op. 25 No 1, Etude in A♭ major

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In A, CDP, and FE, there is no  raising d1 to d1. This patent oversight was corrected in GE and EE. AI also includes the correct text.

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , Inaccuracies in FE , GE revisions , Omission of current key accidentals

b. 25

composition: Op. 25 No 1, Etude in A♭ major

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In the majority of the sources, there are inaccuracies concerning the notation of accidentals, not having an impact on the interpretation of the text. In AI, A (→CDP) and FE, there are no naturals before the 3rd note in the L.H. (a) and the 4th note in the R.H. (e1), while in EE1, there is no  before the 3rd note in the R.H. (c2). GE and EE2 (→EE3) have the correct text. In some of the sources, there are additional cautionary accidentals – naturals before in the middle of the bar and a1 in the last group in AI and before c3 in GE3 (→#GE4). 

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Inaccuracies in FE , Errors in EE , GE revisions , Inaccuracies in A

b. 37

composition: Op. 25 No 1, Etude in A♭ major

 in AI, A (→GE) & EE

Earlier  in FE

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The too early placed  mark in FE is, according to us, a result of an error or misunderstanding.

category imprint: Differences between sources

issues: Inaccuracies in FE

b. 40-42

composition: Op. 25 No 1, Etude in A♭ major

No indication in AI & CDP

in A (→GE) & EE

in FE

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The dim. indication could have been added in A after preparing CDP. Lack of the dashes determining the range of its indication in FE is probably a result of the engraver's inaccuracy.

category imprint: Differences between sources; Corrections & alterations

issues: Inaccuracies in FE

b. 48

composition: Op. 25 No 1, Etude in A♭ major

No signs in AI & FE

L.H. arpeggio sign in A (→CDP,GE)

Two arpeggio signs in EE

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Taking into account the span of the chord in the L.H., lack of arpeggio next to the chord must be considered as an inaccuracy of notation. In turn, the arpeggio in the R.H. could have been added by Chopin in the base text to EE, although the revision of the editor is also possible.

category imprint: Differences between sources

issues: EE revisions , Inaccuracies in FE