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b. 80

composition: Op. 25 No 10, Etude in B minor

..

In GC (→GE), EE1 and EE3 the last quaver is a b-boctave.

category imprint: Differences between sources

b. 82

composition: Op. 25 No 10, Etude in B minor

..

The top note of the chord on the 2nd beat of the mar in FE is a b. The mistake was corrected in FED. The remaining sources feature the correct text.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , Errors in FE , Annotations in FED

b. 83

composition: Op. 25 No 10, Etude in B minor

f-a in GC (→GE) & EE

a in FE

..

Lack of the f note in FE is a possible mistake – it is hard to assume that Chopin performed a correction here and did not notice both the missing  before the crotchet and the mistake in the previous bar.

category imprint: Differences between sources

issues: Errors in FE

b. 83

composition: Op. 25 No 10, Etude in B minor

..

In GC and FE there is no  lowering a to a. The mistake was corrected in GE, EE also includes the correct text. The natural was also added in FED.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , Errors in FE , Annotations in FED , GE revisions , Errors of GC

b. 85

composition: Op. 25 No 10, Etude in B minor

No indication in GC (→GE1), FE & EE

rit. in GE2 (→GE3)

[rit.] suggested by the editors

..

For the third time (after bar 45 and 65) Chopin did not add the rit. indication. According to us, it is an oversight, hence in the main text we suggest adding this indication. A respective revision was performed already in GE2 (→GE3).

category imprint: Differences between sources; Editorial revisions

issues: GE revisions , Omitted correction of an analogous place