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b. 42

composition: Op. 25 No 6, Etude in G♯ minor

g3-d4 in FC (literal reading→GE)

f3-d4 in FC (interpretation), FE & EE

..

FC has most probably fas the bottom note, same as FE and EE, however, the note head is written inaccurately, too high. FC includes a number of similar inaccuracies, cf., e.g., the bottom note of the 12th semiquaver in bar 11. In GE this note was misinterpreted as g3.

category imprint: Graphic ambiguousness; Differences between sources

issues: Errors in GE , Inaccuracies in FC

b. 42

composition: Op. 25 No 6, Etude in G♯ minor

..

The natural lowering a1 to a1 is only in GE and EE3. It is a patent, characteristic for Chopin inaccuracy of notation, rightly revised in GE and EE3.
In all sources there is a superfluous  before d1 in the 1st chord in the bar.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , GE revisions , Omission of current key accidentals

b. 43-46

composition: Op. 25 No 6, Etude in G♯ minor

Fingering in FC (→GE)

No fingering in FE

Fingering in EE

Our suggestion

..

Lack of fingering in the L.H. in FE may mean that it was added by Chopin in FC and base text to EE. Moreover, it cannot be excluded that some of the digits were already in [A], yet they were either overlooked or misunderstood by the engraver of FE (cf. bar 46). In the main text, we give all digits appearing in the sources, as their authenticity, independently from the differences between the sources (and alleged causes of these differences), does not raise major doubts (cf. the Etude in Cminor, No. 7, bars 4-5).

category imprint: Differences between sources

issues: Authentic corrections of FC

b. 43

composition: Op. 25 No 6, Etude in G♯ minor

Slur in FC (→GE) & EE

Wedge & slur in FE

..

The most detailed articulation indications in FE are most probably a result of Chopin proofreading.

category imprint: Differences between sources

issues: Authentic corrections of FE

b. 46

composition: Op. 25 No 6, Etude in G♯ minor

No marks in FC (→GE) & EE

Wedges in FE

..

The wedges present only in FE may be an authentic clarification of notation. However, it cannot be excluded that the engraver misinterpreted Chopin 'ones' of the fingering (in FE there are no fingering digits). This type of error certainly occurred in the Etude in D major, Dbop. 36 No. 3, bars 69-70, as well as in the Etude in F major, Op. 10 No. 8, bar 2

category imprint: Differences between sources