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b. 7

composition: Op. 10 No 2, Etude in A minor

..

In Ap there is no  returning a2 at the 9th semiquaver of the bar. It must have been Chopin's oversight. 

category imprint: Differences between sources

issues: Omissions to cancel alteration , Errors of A

b. 7

composition: Op. 10 No 2, Etude in A minor

 g2 in CLI, Ap, GE2 (→GE3) & EE4

No  in FE (→GE1, →EE2EE3) & GE4 (→GE5)

..

The lack of  raising g2 into gon the 10th semiquaver is probably an error of FE (→GE1,→EE2EE3). It is worth mentioning that when interpreted literally, FEcor has ghere, as the  before the 2nd semiquaver of the bar is still valid (see the previous remark). Similarly, despite lack of the gis featured in GE1 and GE4 (→GE5). The correctly written combination of the E minor triad on the 2nd beat of the bar and gin the described place appears only in Ap

category imprint: Differences between sources

issues: Errors in FE

b. 7

composition: Op. 10 No 2, Etude in A minor

..

CLI has by mistake an on the 3rd beat of the bar. Probably it was similar also at the beginning of the bar, yet in this situation the copyist realised the mistake and corrected the erroneous note. 

category imprint: Interpretations within context; Differences between sources

issues: Errors of CLI

b. 7-9

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

No fingering in A

Fingering in FE (→GE)

Fingering in EE

..

In the main text we give the fingering added by Chopin in a proofreading of FE (→GE). Fontana added it in EE in a way which can be considered as naturally stemming from Chopin's hints (although certainly not the only one in the 2nd half of bar 8). 

category imprint: Differences between sources

issues: EE revisions , Authentic corrections of FE

b. 7-8

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

in A

in FE (→GE,EE

..

The omission of the dashes limiting the range of the dynamic change in FE (→GE,EE) belongs to the most frequent inaccuracies of French first editions of Chopin's works.

category imprint: Differences between sources

issues: Inaccuracies in FE