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b. 2-3

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

..

AI is missing the indications cresc. and con forza.

category imprint: Differences between sources

b. 4

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

Fingering written into FED

No teaching fingering

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FED

b. 4

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

No marking in AI & FE (→GE,EE)

 in A

Our variant suggestion

..

Omission of  in FE (→GE,EE) is rather a result of the engraver's distraction than Chopin's proofreading. The composer, who in two other places in the Etude – in bar 48 and 56 – added  when proofreading FE, could have accepted the lack of this indication. Therefore, we suggest a variant solution. 

category imprint: Differences between sources

issues: Errors in FE

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. 6-8

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

Slur in AI

Slurs in A, interpretation

Slur in FE (→GE,EE)

..

The range and meaning of the slurs of A is not entirely clear. In the main text we give the graphically and musically unambiguous slur of FE (→GE,EE), which is probably a result of Chopin's proofreading. The short slur of AI is probably fragmented (cf. bars 2-4).

category imprint: Differences between sources

issues: Inaccurate slurs in A , Authentic corrections of FE