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b. 4-5

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

Slur in GC (possible interpretation→GE1) & EE

Slurs in GC (probable interpretation), FE & GE2 (→GE3)

..

In GC both the end of the slur in bar 4 (at the end of the line) and the beginning of the slur in bar 5, starting the new line, are written with such an extensive movement that they can be interpreted as one slur. According to us, it is, however, more likely that Chopin wanted to emphasise the beginning of the theme with a new slur. 

category imprint: Graphic ambiguousness; Differences between sources

issues: GE revisions , Inaccuracies in GC

b. 4

composition: Op. 25 No 9, Etude in G♭ major

..

The cautionary  before c1, undoubtedly justified in this context, was added only in GE and EE3.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , GE revisions

b. 4-5

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

No slur in GC (→GE) & FE1 (→FE2EE)

Slur in FE3 (→FE4)

..

The slur over the part of the L.H. is undoubtedly a Chopin addition introduced in the proofreading of FE3 (→FE4).

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE

b. 4

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

..

FE (except for FE4) lacks in five necessary accidentals – naturals before d2 and b and sharps before ff2 and g2. This patent inaccuracy certainly has its source in the notation of [A]. Similarly in GC, in which, however, Chopin added a  raising b to b. In GC (→GE) there are also no naturals before the last octave in the R.H. – it can be an oversight of the copyist or a later addition in [A]. In the remaining sources the signs were completed (all additions can be attributed to a revision): three were added in EE1 and FE4, four in GE; only EE2 includes the correct notation. Cf. bar 24.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , Inaccuracies in GE , Inaccuracies in FE , GE revisions , Omission of current key accidentals , FE revisions , Inaccuracies in GC , Authentic corrections in GC

b. 4-5

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

Fingering written in FED, more probable reading

Less probable reading

No teaching fingering

..

The fingering, added in pencil, most probably by Miss O'Méara, could have been indicated to her by Chopin. According to us, the numeral under the last quaver in bar 4 can be interpreted in two ways – as '4' or as '1'.

category imprint: Graphic ambiguousness; Differences between sources

issues: Annotations in teaching copies , Annotations in FED