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b. 10

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

..

In A the last quaver was probably added later, while the irregular group marking was changed from 9 to 10.

category imprint: Corrections & alterations

issues: Corrections in A , Main-line changes

b. 11-12

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

in b. 11-12 & cresc. in A

 & cresc. in GE (→FE)

in EE

 in b. 12 & cresc. in IE

..

The interpretation of the  hairpin in A, in spite of differing arms, seems quite simple – while writing the top arm, Chopin had to bypass the R.H. chord, hence we assume that it is the bottom arm that determines the intended length of the mark. In GE (→FE,EE) bar 12 opens a new line, which forced the division of the hairpin into two separate marks (it was one of the ways – in addition to the contemporary one – of reproducing hairpins in such situations). IE omitted the first one, probably due to the engraver's inattention.
In EE the cresc. indication in bar 12 was omitted, which could be a simplification of notation or an oversight.

category imprint: Graphic ambiguousness; Differences between sources

issues: EE revisions , Scope of dynamic hairpins , Errors in EE , GE revisions , Inaccuracies in A , Errors in IE

b. 11

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

..

GE (→EE1,IE) has  before the highest note of the 2nd R.H. chord, which if read literally would give e2. The error probably occurred during proofreading – the  should have been added before the top note of the next chord. The mistake was corrected in FE and EE2.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in GE , FE revisions , Errors repeated in EE , Errors repeated in IE

b. 12-14

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

..

As in many other places, Chopin omitted accidentals to one of the notes of an octave if the pitch of the other one had already been defined. In this case, it concerns the top notes of both chords in bar 12 and the second chord in bar 14. The necessary accidentals were added in GE (→FE,EE,IE).
See also the adjacent note.

category imprint: Interpretations within context; Differences between sources

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

b. 12-14

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

..

In A there is a  to f2 in bar 12, which was added in pencil by a foreign hand. Similar accidentals are also in the L.H. part in bars 13-14, in which the omitted accidentals to the bottom octave notes were added (B1, B1, A, A1, A1), yet the top note of the last octave in bar 14 (a) was left without an accidental. It remains unclear who, when and why added them, as these additions include only a small fraction of the accidentals omitted by Chopin and added in GE, which rather rules out the natural assumption that it was the reviser of that edition. We do not consider these accidentals to be a part of A and do not reproduce them in the transcriptions of this source.

category imprint: Source & stylistic information

issues: Foreign hand additions in manuscripts