Issues : Last key signature sign

b. 40-42

composition: Op. 10 No 4, Etude in C♯ minor

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In AI there are a few additional or unnecessarily repeated accidentals ( before a, the 11th note in the L.H. in bar 40 and  before f, the 11th note in bar 41), or totally unjustified ( before d2, the 6th note in bar 40 and before d, the 2nd note in bar 41). In FE (→EE,GE1GE1aGE2GE3) only  before f, the 11th note in bar 41 remained, first removed in GE4 (→GE5).

category imprint: Differences between sources; Source & stylistic information

issues: GE revisions , Last key signature sign

b. 40

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

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In GC and FE1 (→FE2FE3FE5) there is no  before the 1st note in the R.H. This patent, from the harmonic point of view, mistake was corrected in GE, EE and FE4 (in the case of the last two editions, Chopin's proofreading cannot be excluded). A natural was added in FES too.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , EE revisions , Errors in FE , GE revisions , Omission of current key accidentals , Annotations in FES , FE revisions , Last key signature sign , Errors of GC

b. 40

composition: Op. 31, Scherzo in B♭ minor

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The manuscripts are missing the  before the bottom note of the 1st chord in the R.H. The patent inaccuracy was corrected both in FE (→EE) and GE.

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , GE revisions , Omission of current key accidentals , FE revisions , Last key signature sign

b. 41

composition: Op. 21, Concerto in F minor, Mvt II

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All sources include an unjustified in this context  before the ggrace note.

category imprint: Editorial revisions

issues: Cautionary accidentals , Last key signature sign

b. 43

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

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In GC (→GE1), FE and EE1, before the last octave in the R.H. (c3-c4) there are flats. The signs, completely unjustified in this place, must have been also in [A], which is a very meaningful example of Chopin's uncertainty concerning the issue of the prevailing set of key signatures, particularly the last one. The signs were removed in GE2 (→GE3) and EE2, while in GE3 they were reintroduced, which indicates rather a mechanical work of the reviser of EE3, copying the versions of GE1 without having analysed their accuracy.

category imprint: Differences between sources

issues: EE revisions , GE revisions , Cautionary accidentals , Last key signature sign