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b. 232-234

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

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Before the top note of the last octave in bar 232 and the 2nd one in bar 234, there are no accidentals in GC and the earlier FE. The necessary signs –  of f and  of b – were added in EE, GE and FE4.

category imprint: Differences between sources

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

b. 232

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

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In all sources, there is a repeated  (cautionary?) next to the fnote on the second beat. In the main text we omit this superfluous accidental.

category imprint: Editorial revisions

issues: Cautionary accidentals

b. 234

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

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We add cautionary naturals to f1-f2 in the main text.

category imprint: Editorial revisions

b. 236

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

a1 in chord in GC (→GE1)

f1 in FE (→EE) & GE2

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The version of GC (→GE1) is certainly erroneous – the double stroke of the same note (a1) by the L.H., unjustified by the voice leading, does not make any sense, as far as the piano technique is concerned. It is worth observing that the copyist initially wrote a chord within the correct, one octave, span, yet with a double Terzverschreibung error – a-c1-e1-a1. He then corrected it, yet only partially. 

category imprint: Differences between sources

issues: Terzverschreibung error , GE revisions , Errors of GC , Alterations in GC

b. 239

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

B1-B in the sources

B2-B1 suggested by the editors

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The descending bass line in two previous bars suggests the use of a B2-Boctave, absent in the pianos being at Chopin's disposal (the range of his instruments reached C1).

category imprint: Editorial revisions

issues: Constraint from piano range