Issues : Errors in FE

b. 68

composition: Op. 10 No 12, Etude in C minor

in A (→FEGE)

d in EE

..

In the main text we give (with a cautionary ) after A. In FE there are two accidentals before this note,  and , one on another. It is an easier performed correction, however, it is unclear which of the signs was supposed to be removed and which should be considered as binding. GE includes a  and EE – 

category imprint: Graphic ambiguousness; Differences between sources

issues: Errors in FE , Errors in EE , Cautionary accidentals , Authentic corrections of FE

b. 68

composition: Op. 10 No 12, Etude in C minor

Slur in A

No slur in FE (→GE)

Slur in EE

..

Lack of the slur in FE (→GE) is certainly a mistake. The half-bar-long slur, added here in EE, can also be an error.

category imprint: Differences between sources

issues: EE revisions , Errors in FE

b. 75

composition: Op. 10 No 12, Etude in C minor

Dotted minim in A, GE & EE4

Semibreves in FE (→EE3)

..

The version of FE, when interpreted literally – d1-f1 as semibreves, including the upper one with a dot – is certainly erroneous. We assume, as it was interpreted in EE, that the notation determines the value of semibreve for the lower voice. This version could be considered to be a result of Chopin's proofreading, yet the engraver's error, who simply did not complete the work (a minim flag and a dot next to the lower note are missing), seems to be a more likely possibility. This is how this place was corrected in GE; we give this undoubtedly authentic version in the main text. 

category imprint: Differences between sources

issues: EE revisions , Errors in FE , GE revisions , Rhythmic errors

b. 77

composition: Op. 10 No 12, Etude in C minor

Dot in A

No mark in FE (→GE,EE

..

According to us, omission is the most plausible reason for overlooking the staccato dot in the lower voice in FE (→GE,EE). Cf. the note to the L.H. and bars 79-81.

category imprint: Differences between sources

issues: Errors in FE

b. 77

composition: Op. 10 No 12, Etude in C minor

Wedge in A

No mark in FE (→GE)

Dot in EE

..

In the main text we give the wedge, most probably omitted in FE (→GE) due to the engraver's oversight. It is unclear on which basis a dot was added here in EE.

category imprint: Differences between sources

issues: EE revisions , Errors in FE , Wedges