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b. 31-32

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

..

In both bars AI features aas the 5th semiquaver (the note is written only in bar 31, as bar 32 is briefly marked as repetition of the previous one). This pianistically and sonically awkward version is certainly a mistake, which is revealed by the compatible version of the remaining sources, as well as the comparison with analogous bars 35-36.

category imprint: Differences between sources

issues: Terzverschreibung error , Errors in the number of ledger lines

b. 31

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

4 staccato dots in A (→FEGE1)

3 staccato dots in EE & GE2 (→GE3GE4)

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The dot over the last octave is, according to us, Chopin's mistake in A (→FEGE1) – cf. the analogous motif in bar 59. The dot was removed in EE and GE2 (→GE3GE4). In AI there are no indications in this bar.  

category imprint: Differences between sources; Editorial revisions

b. 32

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

No marking in AI, A, EE & GE3 (→GE4)

 in FE (→GE1GE2)

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 appearing under the part of the L.H. in FE (→GE1GE2) is an evident error, corrected in EE and later GE,s.

category imprint: Differences between sources

issues: EE revisions , Errors in FE , GE revisions

b. 33-34

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

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Before the 9th semiquaver there is no  raising e1 to ein AI (the notes are written out only in bar 33, as bar 34 is only briefly marked as repetition of the previous one). It is a patent inaccuracy, which is confirmed by the compatible version of the remaining sources, as well as the comparison with analogous bars 29-30.

category imprint: Differences between sources

issues: Omission of current key accidentals

b. 33-36

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

No pedalling in AI & A

Pedalling in FE (→GE,EE)

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Pedalling of this 8-bar section (bars 29-36) was added by Chopin in a proofreading of FE (→GE,EE). See also bars 17-26 and 36.

category imprint: Differences between sources

issues: Authentic corrections of FE