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b. 133-138

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

No fingering in A (→GEFE,IE)

Fingering in EE

..

In the main text we do not include the inauthentic L.H. part fingering added by EE in bars 133-135 and 138.

category imprint: Differences between sources

issues: EE revisions

b. 133

composition: Op. 12, Variations in B♭ major

Staccato dots in FE (→EE)

No staccato dots in GE

..

The absence of staccato dots in GE must be a mistake, since dots are present in the L.H. part.

category imprint: Differences between sources

issues: Errors in GE

b. 133-134

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

..

As in previous bars, in A Chopin left out all necessary accidentals to the top notes of the even quavers – the naturals to a2 and e3 and the sharps to f3 (both), e3 and d3. He did not write the  raising c2 to c2 on the 7th quaver in bar 134 either. All these patent inaccuracies were corrected in GE (→FE,EE,IE).

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , GE revisions , Inaccuracies in A

b. 133-134

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

..

In A each L.H. note on a ledger line – E, C, E, F1 – is provided with a "tail", which, in a relevant context, could be considered an additional crotchet stem pointing downwards. It would make sense in the case of E and F1, but C and E prove that it is simply a writing manner.
Cf., e.g. the Etude in F, Op. 10 No. 8, bars 4-7.

category imprint: Graphic ambiguousness; Source & stylistic information

issues: Uncertain notes on ledger lines

b. 133

composition: Op. 12, Variations in B♭ major

L.H. slur to b1 in FE (→GE,EE)

Slur to c2 & R.H. slur suggested by editors

..

Taking into account the 4 subsequent slurs in this and the next bar, always encompassing entire motifs, we consider the source L.H. slur to be inaccurate (one can assume negligence by the engraver or by Chopin in [A]). Therefore, in the main text we suggest a slur reaching c2; we also add a respective R.H. slur.

category imprint: Editorial revisions