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b. 5-13

composition: Op. 10 No 6, Etude in E♭ minor

 twice in A

 once in FE (→GE) & EE3 (→EE4)

Our variant suggestion

..

In bars 5 and 13 it is not certain whether the difference between the indications (accents,  hairpins) of A and FE (→GE,EE) is a result of the engraver's inaccuracy or Chopin's intervention. In the main text we propose coherent indications of A

category imprint: Differences between sources

issues: Long accents , Inaccuracies in FE

b. 5-6

composition: Op. 10 No 7, Etude in C major

Long accent in A & EE

Short accent in FE (→GE)

..

In A the accent in bar 5 is significantly longer than the one in bar 6 (similarly in bars 9-10). A minor difference was reproduced only in EE, which is probably a fortuitous coincidence.

category imprint: Differences between sources

issues: Long accents , Inaccuracies in GE

b. 5-14

composition: Op. 10 No 7, Etude in C major

No slurs in A (→FEGE)

Seven slurs in EE3

Ten slurs in EE4

..

The whole-bar long slurs of EE are an arbitrary addition of the reviser who simply copied the authentic slurs from bars 1-4. The revision includes bars 5-11 in EE3 and in EE4 also bars 12-14.

category imprint: Differences between sources

issues: EE revisions

b. 5-6

composition: Op. 10 No 9, Etude in F minor

..

In bar 5 and in the 1st half of bar 6, in AI, instead of part of the L.H., there is come sopra, which, in this context, undoubtedly refers to bars 1-2 and means repetition of the notation of the first three groups of semiquavers.

category imprint: Source & stylistic information

issues: Abbreviated notation of A

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