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b. 81

composition: Op. 29, Impromptu in A♭ major

..

Chopin wrote the last dnote in A (→GE) with a flat. In FE and EE there is a similar situation. We delete the sign which is unnecessary in this context.

category imprint: Editorial revisions

issues: Cautionary accidentals

b. 82

composition: Op. 29, Impromptu in A♭ major

 
 
..

EE is lacking the natural raising b to in the ending of the 1st trill. It is probably an oversight.

category imprint: Differences between sources

b. 85

composition: Op. 29, Impromptu in A♭ major

..

AFE and EE are lacking the flat returning e2 at the end of the bar. This type of oversights are the most frequent errors made by Chopin. Cf. bar 71.

category imprint: Interpretations within context; Differences between sources; Editorial revisions

issues: Omissions to cancel alteration

b. 89

composition: Op. 29, Impromptu in A♭ major

 
 
..

A, FE and EE are lacking the natural raising d3 into d3. The sign was added in GE.

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves

b. 90

composition: Op. 29, Impromptu in A♭ major

..

EE is lacking the naturals raising d1 into d1 on the 2nd quaver in the L.H. and d2 into d2 on the 6th quaver in the R.H. The error was corrected in EE2.

category imprint: Differences between sources

issues: Errors in EE