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b. 44-45

composition: Op. 10 No 10, Etude in A♭ major

Fifth in A

Triad in FE (→GE,EE)

..

The version of FE (→GE,EE) is undoubtedly a result of Chopin's proofreading. In an analogous place at the beginning of the previous bar, in A there are traces of deleting the note, hence one can speak of Chopin's hesitation.

category imprint: Differences between sources; Corrections & alterations

issues: Chopin's hesitations , Authentic corrections of FE

b. 49

composition: Op. 10 No 10, Etude in A♭ major

..

While proofreading FE (→GE,EE), Chopin added cautionary accidentals before g1 and g2. In the main text we give only the 1st of them.

category imprint: Differences between sources; Editorial revisions

issues: Cautionary accidentals , Authentic corrections of FE

b. 53

composition: Op. 10 No 10, Etude in A♭ major

..

In FE (→EE) the double flat was erroneously placed before the bottom note of the third. However, this patent inaccuracy was corrected only in GE.

category imprint: Differences between sources

issues: Errors in FE , GE revisions

b. 66

composition: Op. 10 No 10, Etude in A♭ major

b1 in A (→FEEE)

g1 in GE

..

Initially, the erroneous version of GE – with g1 – was also in FE, in which, however, this g1 was changed to bin the last proofreading. 

category imprint: Differences between sources

issues: Errors in FE , Terzverschreibung error , Authentic corrections of FE

b. 67

composition: Op. 10 No 10, Etude in A♭ major

h1 in A

c1 in FE (→GE,EE)

..

Lack of the flat lowering c1 to c1 in the 2nd half of the bar in FE (→GE,EE) is probably an oversight of the engraver, who could have confused this bar with bar 65.

category imprint: Differences between sources

issues: Errors in FE