Issues : Inaccuracies in A

b. 20

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

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In A (→FEGE1GE2,→EE2EE3) there is no  raising G to G. This patent accuracy was corrected in FES and later editions.

In the sources the natural raising g to g is before the first sustained semiquaver in the bar. We move it before the 4th note, according to General Editorial Principlesp. 3.

category imprint: Differences between sources

issues: Annotations in teaching copies , EE revisions , GE revisions , Omission of current key accidentals , Annotations in FES , Inaccuracies in A

b. 34

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

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In A is missing before the bottom note of the 2nd octave.

category imprint: Differences between sources

issues: Authentic corrections of FE , Inaccuracies in A

b. 45

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

Minim e1 in A (→FEGE1,EE)

Dotted minim in GE2 (→GE3GE4GE5)

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The overlooked dot extending the e1 minim in A was added only in GE2 (→GE3GE4GE5). It is not a rhythmic mistake sensu stricto, yet the comparison with analogous bars 5 and 13 prove Chopin's error. 

category imprint: Interpretations within context; Differences between sources

issues: GE revisions , Inaccuracies in A