Issues : Omission of current key accidentals

b. 25

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

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The naturals before the 3rd octave of the bar are only in EE, FE4 and GE2. Chopin's patent inaccuracy was completed by revisers in probably all cases (certainly in GE2).

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Inaccuracies in GE , Inaccuracies in FE , GE revisions , Omission of current key accidentals , FE revisions , Inaccuracies in GC

b. 25

composition: Op. 28 No. 24, Prelude in D minor

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In A there are no naturals raising b to b. The patent inaccuracy was corrected in FC (→GE) by adding a  only before the grace note, while in FE (→EE) in the way adopted in the main text.

category imprint: Interpretations within context; Differences between sources

issues: Omission of current key accidentals , Errors of A , FE revisions , Fontana's revisions

b. 25-27

composition: Op. 28 No. 12, Prelude in G♯ minor

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As was the case with b. 24, in A (→FC,FE) there is not a single  before the a notes (in various octaves). The accidentals were added in EE (all) and in GE (except a1 in b. 26 and a in b. 27).
See also bars 27-32.

category imprint: Interpretations within context; Differences between sources

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

b. 26-27

composition: Op. 45, Prelude in C♯ minor

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In FE1 there is no  lowering gto g2, neither before the penultimate quaver in bar 26, nor at the beginning of bar 27. These patent inaccuracies were corrected both in FE2 and in EE. Moreover, in FE, both in the last octave in bar 26 and in the chord at the beginning of bar 27, all c notes have sharps. In EE the sharps are left only in bar 26. GE has a correct text in accordance with the modern notation rules.

category imprint: Differences between sources

issues: EE revisions , Accidentals in different octaves , Inaccuracies in FE , Cautionary accidentals , Omission of current key accidentals , FE revisions

b. 26

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

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Same as in bar 18, in GC (→GE1) and FE there is no  raising g2 to g2.

category imprint: Interpretations within context; Differences between sources

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