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b. 72-80

composition: Op. 35, Sonata in B♭ minor, Mvt III

..

Same as in bars 18 and 26, in GC (→GE1) and FE (→EE1) there are no naturals raising g2 to g2 at the beginning of bars 72 and 80 (both or one). Chopin's oversight was corrected in EE1 in bar 72, whereas in EE2 and GE2mar (→GE2) in both bars.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , Errors in EE , Errors in GE , GE revisions , Omission of current key accidentals , Last key signature sign

b. 73-82

composition: Op. 35, Sonata in B♭ minor, Mvt III

a1 & f1 in chords in GC (→GE1) & FE (→EE1)

a1 (with cautionary ) & f1 in GE2mar (→GE2) & EE2

No a1 & f1 in chords in FES

..

FES deleted the top notes of the chords in bars 73-74 and 81-82, most probably in order to facilitate performance to the pianists with small hands. See bars 19-20.
GE2mar (→GE2) and EE2 added a cautionary  before the first a1 in bars 73 and 81.

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FES

b. 74

composition: Op. 35, Sonata in B♭ minor, Mvt III

..

Similarly as in bar 20, due to Chopin's mistake in [A], the correct notation of the trill appeared in the editions – despite the proofreading of FE3 – only in GE2 and EE2. The mistake was corrected in all pupil's copies.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , EE revisions , Errors in FE , Annotations in FED , Errors in EE , Errors in GE , GE revisions , Annotations in FES , Authentic corrections of FE , Annotations in FESch

b. 75-83

composition: Op. 35, Sonata in B♭ minor, Mvt III

 before 2nd beat in the sources

 at the beginning of bar suggested by the editors

..

The placement of the  sign in bars 75 and 83 – see bar 21.

category imprint: Interpretations within context; Editorial revisions

issues: Centrally placed marks

b. 75-76

composition: Op. 35, Sonata in B♭ minor, Mvt III

No slur in GC (→GE1)

Slur in FE (→EE) & GE2mar (→GE2)

category imprint: Differences between sources

issues: GE revisions