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b. 68-69

composition: Op. 25 No 12, Etude in C minor

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GE1 does not include any accent in bar 68, whereas in EE1 (→EE2) there is no accent in the middle of bar 69 (similarly in bar 70). These patent errors were corrected in GE2 (→GE3) and EE3.

category imprint: Differences between sources

issues: EE revisions , Errors in EE , Errors in GE , GE revisions

b. 69

composition: Op. 25 No 12, Etude in C minor

Fingering in FC (→GE) & EE3

No fingering in FE & EE1 (→EE2)

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The fingering of FC (→GE) could have been added by Chopin. In EE3 it was repeated after GE.

category imprint: Differences between sources

issues: EE revisions

b. 70

composition: Op. 25 No 12, Etude in C minor

Accent below L.H. part in FC (→GE1), FE & EE3

No accent in EE1 (→EE2)

Accent between notes in GE2 (→GE3)

2 accents suggested by the editors

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We add an accent over the notes – see bars 13-14.

category imprint: Differences between sources; Editorial revisions

issues: Errors in EE , GE revisions

b. 71-75

composition: Op. 25 No 12, Etude in C minor

3 long accents in FC

2 short accents in FE & EE

3 short accents in GE

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In bars 71, 73, 75, in the main text we give long accents, placed over the bottom stave and probably written by Chopin in FC. It is not clear why this notation was not reproduced in GE – probably the notation of bars 17, 19, 23, 25, 27 and 77 was considered to be more accurate and it was generalised for all analogous bars. It cannot be excluded that the engravers of FE and EE followed this pattern, so in these editions the authenticity of the graphical shape of the accents is also uncertain.
The missing signs in bar 73 in FE and EE is most probably a result of an oversight. 

category imprint: Differences between sources

issues: Long accents , Inaccuracies in GE , Authentic corrections of FC

b. 72

composition: Op. 25 No 12, Etude in C minor

Accents in FC (→GE) & FE

No accents in FE

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Same as in bars 16 and 24, the accents on the 11th and 15th semiquavers are remnants of the previous version. In the proofreading of FE Chopin changed them into long accents on the 9th and 13th semiquavers – see the previous note in this bar

category imprint: Differences between sources

issues: Long accents , Authentic corrections of FE