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b. 2

composition: Op. 10 No 10, Etude in A♭ major

..

We add a cautionary  before e2. The sign was already added in GE.

category imprint: Differences between sources; Editorial revisions

issues: GE revisions

b. 5

composition: Op. 10 No 10, Etude in A♭ major

..

The hook at the bottom of the natural raising d3 to d3, resulting from haste while writing A, was initially interpreted in FE as a flat before f2. The mistake was then corrected. 

category imprint: Source & stylistic information

issues: Errors in FE , Authentic corrections of FE

b. 5-8

composition: Op. 10 No 10, Etude in A♭ major

..

In the 2nd four-bar section Chopin wrote the accidentals less carefully. In A (→FE) there are no naturals before b2 in bar 5 and d3 in bars 7-8. These patent oversights were corrected in GE and EE (in EE3 the  in bar 7 was not completed).

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , GE revisions , Errors of A

b. 6-8

composition: Op. 10 No 10, Etude in A♭ major

..

The cautionary  before e2 at the beginning of bar 6 was added in a proofreading of FE (→GE,EE). In the main text we still add a few cautionary signs in bar 8 – flats before a2 on the 3rd and a1 on the 5th quavers, as well as a  before f2 on the 6th quaver. The flats were already added in GE2 (→GE3GE4), while the first of them also in EE4.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , GE revisions , Cautionary accidentals , Authentic corrections of FE

b. 7-8

composition: Op. 10 No 10, Etude in A♭ major

..

The natural raising a1 to a1 in bar 7 and the  returning d1 in bar 8, omitted in A, were added in a proofreading of FE (→GE,EE).

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , Omissions to cancel alteration , Authentic corrections of FE , Inaccuracies in A