Issues : Errors in FE

b. 27-30

composition: Op. 25 No 11, Etude in A minor

..

In the passages including a few octaves, there are no accidentals in the sources, which, however, does not raise doubts concerning the text intended by Chopin.

In GC there are no sharps needed in the notation of f1f2 in bar 27, ff1f2 in bar 28, f2f1 (L.H.), c1 in bar 29 and fd2 in bar 30.
In FE the same signs apart from the sharps before f1 in bar 27 and f1 (L.H.) in bar 29 were omitted; moreover, the  raising d2 to d2 in bar 29 was overlooked.
GE1 completed the signs overlooked in GC except for the  raising f1 to f1 in the L.H. in bar 29.
In the remaining editions – EE and GE2 (→GE3) – all necessary signs were added.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , GE revisions , Omission of current key accidentals , Errors of GC

b. 39

composition: Op. 25 No 11, Etude in A minor

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There is no accidental before the penultimate semiquaver in GC (→GE1), FE and EE. The missing  returning d3 is undoubtedly an oversight of Chopin, corrected in GE2 (→GE3).

category imprint: Interpretations within context; Differences between sources

issues: Errors in FE , Errors in EE , Omissions to cancel alteration , GE revisions , Errors of GC

b. 50

composition: Op. 25 No 11, Etude in A minor

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In GC, FE and EE1 (→EE2) there is no  returning a2. This patent inaccuracy was corrected in GE and EE3.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , Errors in EE , Omissions to cancel alteration , GE revisions , Errors of GC

b. 64

composition: Op. 25 No 11, Etude in A minor

No fingering in GC (→GE) & EE

Fingering in FE, literal reading

Fingering in FE, contextual interpretation

Fingering suggested by the editors

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The second of the fingering numerals, present only in FE, may be erroneous – the 1st finger may refer here only to b1, which does not result from the notation. It is likely that the engraver misinterpreted the wedge written in the manuscript, which is present here in the other sources.  

category imprint: Differences between sources

issues: Errors in FE

b. 70

composition: Op. 25 No 11, Etude in A minor

Triad in GC (→GE) & EE

Fifth in FE

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Lack of c1 in FE is certainly a mistake. This kind of error suggests that the engraver worked there on the basis of manuscripts and not a proof copy of the already engraved by him first page of the Etude.

category imprint: Differences between sources

issues: Errors in FE