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b. 72

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

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In the main text, we add cautionary flats before a2-a3.

category imprint: Editorial revisions

b. 73

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

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In GC the part of the R.H. is written in this bar one octave lower, as the copyist forgot to end the octave sign in the new line of the text. All the remaining sources include the correct text.

category imprint: Interpretations within context; Differences between sources

issues: GE revisions , Errors of GC

b. 74-75

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

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In the main text, we add flats before d in L.H. in bar 74 and before g1 in R.H. in bar 75.

category imprint: Editorial revisions

b. 76

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

GC (→GE)

FE1 (→FE2)

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According to us, the first half of the bar has only one authentic version, written in [A] and conveyed by EE and FESch. The versions of GC and FE1, hence sources based on [A], were probably a result of its misinterpretation by the copyist and the engraver of FE. Chopin restored the correct text, by amending the mistake in FE2 and FESch and – most probably – in the base text to EE. The versions of FE3 and FE4 are most probably a result of mistakes at the time of proofreading FE2 and FE3 respectively. 

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

issues: Errors in FE , Authentic corrections of FE , Errors of GC

b. 77

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

g1-d2-g2 in GC, FE (→EE) & GE2

g1-e2-g2 in GE1

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The e2 note (instead of d2) in the last chord of the R.H. is certainly a mistake of GE1, caused by an inaccurate placement of this note in GC.

category imprint: Differences between sources

issues: Errors in GE , GE revisions