Select: 
Category
All
Graphic ambiguousness
Interpretations within context
Differences between sources
Editorial revisions
Corrections & alterations
Source & stylistic information
Notation
All
Pitch
Rhythm
Slurs
Articulation, Accents, Hairpins
Verbal indications
Pedalling
Fingering
Ornaments
Shorthand & other
Importance
All
Important
Main


b. 155

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

e2 in GC (→GE)

c2 in FE (→EE), contextual interpretation

..

The structure of the figuration in the entire passage in the L.H. (bars 153-156 and 157-160), and particularly the comparison with analogous bar 159, indicate a mistake of the copyist in this place. The absence of a correction in GE may be attributed to the absent  before this note (although in a similar situation four bars later, a  before the respective note – c2 – was added). The sign is absent also in the majority of the sources featuring the note at the correct pitch – it was added only in EE2

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , Terzverschreibung error , Errors of GC

b. 155

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

g2-b2 in FE1 (→FE2EE1)

f2-b2 in GC (→GE), FE3 (→FE4) & EE2

..

g2 instead of f2 at the last quaver of the bar is certainly a mistake of Chopin in [A]. It is proved by the  before the note, present both in FE1 (→FE2) and GC, which originally also included g2. Chopin corrected the mistake in GC and the proofreading of FE3 (→FE4). The erroneous version was passed down to EE1, in which it was revised, by deleting the , which was superfluous before g2.

category imprint: Differences between sources; Corrections & alterations

issues: Errors in FE , Inaccurate note pitch in A , Authentic corrections of FE , Authentic corrections in GC

b. 155

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

e2-g2 in GC (→GE) & FE2 (→EE,FE3FE4)

g2-b2 in FE1

..

The characteristic, Terzverschreibung mistake of FE1 was corrected already in FE2.

category imprint: Differences between sources

issues: Errors in FE , Terzverschreibung error , FE revisions

b. 155

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

..

There is no accidental before the top note of the 2nd quaver in GC and FE1 (→FE2FE3). The patent inaccuracy was corrected in the remaining sources.

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , Inaccuracies in FE , FE revisions , Inaccuracies in GC

b. 156

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

..

At the beginning of the 2nd half of the bar before the bottom note of the second, GC and FE1 (→FE2) have one  before each of the notes instead of . This easy to detect mistake – none of these flats is necessary at this pitch, whereas a1 appears in the part of the L.H. – was corrected in GE, by adding another  before the bottom note. The correct notation is included in FE3 (→FE4) and EE, which in both cases could have been a result of Chopin's intervention.
A double flat before the top note of the penultimate chord was added only in GE and EE2.

category imprint: Interpretations within context; Differences between sources; Corrections & alterations

issues: EE revisions , Errors in FE , Accidentals in different octaves , GE revisions , Authentic corrections of FE , Errors of GC , Authentic corrections of EE