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b. 78-80

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

No slur in GC (→GE) & FE1 (→FE2)

Slur in FE3 (→FE4) & EE

..

The slur over the final motif is undoubtedly a Chopin addition in the proofreading of FE3 (→FE4) and in the base text to EE.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE , Authentic corrections of EE

b. 79-80

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

Repeated octave in GC

Tied octave in FE (→EE) & GE

..

No tie of the octave in the L.H. is certainly an oversight of the copyist, completed in GE.

category imprint: Differences between sources

issues: GE revisions , Errors of GC

b. 81-87

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

6 different slurs in GC

No slurs in FE

7 shorter slurs in EE

4 longer slurs in GE1

5 longer slurs in GE2

7 longer slurs – our suggestion

..

Both versions of slurring appearing in the sources may be authentic, although it does not seem that Chopin hesitated how to mark these bars. The difference results rather from an inaccurate notation, both in [A] (→GCGE) and in the base text to EE. Settling this kind of doubt can be difficult, even if we dispose of the autograph – cf. the Mazurka in G minor, Op. 24 No. 1, bar 21. In the main text, in all seven bars we give slurs embracing entire bars, in accordance with the notation of GC in the vast majority of the cases (five out of six). The version of EE can be considered to be an alternative, equivalent suggestion (in bars 81-84 it offers a kind of an accent on each strike: strong beat of a bar, beginning of the slur, a written out accent; it should not blur the natural character of this delicately swinging figure). 

category imprint: Graphic ambiguousness; Differences between sources

issues: Errors in GE , GE revisions , Authentic corrections of EE

b. 81

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

 in GC (→GE)

No sign in FE (→EE)

..

The  sign was added in GC (→GE) probably by Chopin. It can be assumed that it indicates sustention of pedal throughout four bars.

category imprint: Differences between sources

issues: No pedal release mark

b. 85-86

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

..

In GC, in bars 85-86, the part of the L.H. is written in an abbreviated manner with •/• signs. This type of notation, frequently used by Chopin, was certainly used also in [A].

category imprint: Source & stylistic information

issues: Abbreviated notation of A