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b. 231-232

composition: (Op. 4), Sonata in C minor, Mvt I

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The sources do not include naturals to b2 in bar 231 and to b3 in bar 232, which is due to the fact that the rules of validity of accidentals when using an octave sign are different in the sources than in our edition. See also bar 235.

category imprint: Interpretations within context

issues: Accidentals in different octaves

b. 235

composition: (Op. 4), Sonata in C minor, Mvt I

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The  to the bottom note of the 7th quaver in the bar is missing in the sources, as both Chopin and the publishers considered the accidental to the 1st quaver to be valid also here.

category imprint: Interpretations within context

issues: Accidentals in different octaves

b. 235

composition: (Op. 4), Sonata in C minor, Mvt I

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In the main text we omit the cautionary flats to the A1-A octave (in A only to A), present in the sources.

category imprint: Differences between sources; Editorial revisions

issues: GE revisions , Cautionary accidentals

b. 236

composition: (Op. 4), Sonata in C minor, Mvt I

c1 in chord in A

No c1 in GE (→FE,EE,IE)

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Looking at the notation of the 2nd L.H. crotchet in A, one can have doubts whether it contains the c1 note, as one cannot see there a round notehead thereof, similar to g or d1. Its presence is proven by the fact that this crotchet's stem is clearly thicker, which is sometimes the only graphic element indicating the existence of a note on a ledger line in Chopin's autographs – cf., e.g. c1 at the beginning of the next bar, as well as some c3 and c4 in bars 231-235. The final assessment of such situations largely depends on the context, which in this place clearly supports the presence of c1 – this crotchet continues the sound plane initiated by the minim chords from the three previous bars, out of which each includes c1.

category imprint: Graphic ambiguousness; Differences between sources

issues: Errors in GE , Uncertain notes on ledger lines , Inaccuracies in A

b. 236-237

composition: (Op. 4), Sonata in C minor, Mvt I

8- - - in A

No marking in GE (→FE,EE,IE)

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The absence of the octave sign in the editions is certainly due to a mistake by the engraver of GE1, who overlooked other elements in these bars as well – a note in bar 236 and a quaver flag and a rest in bar 237.

category imprint: Differences between sources

issues: Errors in GE