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b. 23

composition: Op. 10 No 11, Etude in E♭ major

..

Three cautionary naturals before the 3rd quaver in the bar are present in A, yet they were removed in a proofing of FE (→GE1,EE3). It seems to be Chopin's mistake, as after d1 and d2 at the end of the previous bar, the warning is quite justified in this place. The accidentals were added in subsequent GE,s and EE4 (in the latter only in the R.H.).

category imprint: Differences between sources; Corrections & alterations

issues: EE revisions , GE revisions , Cautionary accidentals , Authentic corrections of FE

b. 23

composition: Op. 10 No 11, Etude in E♭ major

..

In A there is no  lowering c3 to c3 in the 1st chord in the R.H.

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , Errors of A , Authentic corrections of FE

b. 24-25

composition: Op. 10 No 11, Etude in E♭ major

..

Shortening of the slur in the editions is, according to us, a result of either a misunderstanding of the autograph or the engraver's inaccuracy. Cf. bars 25-31.

category imprint: Differences between sources

issues: Inaccuracies in FE

b. 24

composition: Op. 10 No 11, Etude in E♭ major

..

Lack of flats returning e in the last chord in A (→FEGE1,EE3) is certainly Chopin's oversight. The accidentals were added in FED and GE2 (→GE3GE4) and EE4.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , Annotations in FED , Omissions to cancel alteration , Errors of A

b. 24

composition: Op. 10 No 11, Etude in E♭ major

..

Between the 5th and 6th quavers in A one can see an unnaturally big gap and traces of deletion of something which had been written there. According to us, it could have been an originally envisaged additional chord, e.g., A-f-c1 in the L.H. and f1-c2-f2 in the R.H. It is striking that it does not seem that the deleted chord was supposed to be the last one in the bar, replaced then by another one – originally the bar included seven chords, the penultimate of which was eventually removed. 

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A