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b. 69

composition: Op. 10 No 4, Etude in C♯ minor

Chord without g2 in AI

Chord with g2 in FE (→GE,EE)

..

In AI Chopin deleted the g2 note in the chord in the middle of the bar. Its presence in FE (→GE,EE) reveals the return to the original version.

category imprint: Differences between sources; Corrections & alterations

issues: Chopin's hesitations

b. 69-70

composition: Op. 10 No 4, Etude in C♯ minor

No slur in AI & GE4 (→GE5)

Slur in FE (→GE1)

GE2 (→GE3)

Our suggestion

..

The fact of beginning the slur from the 2nd group of semiquavers is almost certainly an inaccuracy of notation, which probably follows from [A]. Different versions of the slur's ending in EE and GE2 (→GE3) are certainly a result of the engravers' errors. The omission of the slur in GE4 (→GE5) may be considered as an oversight or revision.

category imprint: Differences between sources; Editorial revisions

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

b. 71-73

composition: Op. 10 No 4, Etude in C♯ minor

No fingering in AI & FE (→GE)

Fingering written into FED

Fingering in EE

..

In the main text we give the fingering written in bar 72 in FED. In EE Fontana added significantly more indications, also in the L.H., however, he never indicated the fingering for the 2nd and 3rd notes of four-note figures in the R.H. Therefore, it seems that despite there being no formal discrepancies between Chopin's class entry and Fontana's fingering, in fact he had a different fingering in mind in this place (121).

category imprint: Differences between sources

issues: EE revisions

b. 71

composition: Op. 10 No 4, Etude in C♯ minor

..

The C1-C octave at the beginning of the bar is briefly written in AI and FE (→EE,GE1GE2GE3) with the help of 8.

category imprint: Source & stylistic information

issues: Abbreviated octaves' notation

b. 72-74

composition: Op. 10 No 4, Etude in C♯ minor

..

We add cautionary sharps before d2 in bars 72 and 74. The signs were already added in GE, while the second of them also in EE4. In bar 74 FE (→GE1,EE) has an additional unjustified  before the 12th semiquaver (c3). This probably erroneous sign was removed in subsequent GE,s. 

category imprint: Differences between sources

issues: EE revisions , GE revisions , Cautionary accidentals