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b. 11

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

..

In EE1 the quaver beam starts from the second note and ends on the fifth one. The mistake was rectified in EE2.

category imprint: Differences between sources

issues: EE revisions , Errors in EE , Sign reversal

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. 11

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

Long accent in A (→GEFE)

No mark in EE

in IE

..

The missing accent in EE is probably the engraver's oversight, while the mark having been extended in IE – an arbitrary, routine revision.

category imprint: Differences between sources

issues: Long accents , Errors in EE ,

b. 11

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

Long accent in A (→GEFE,IE) & EE2

No mark in EE1

..

The accent, overlooked in EE1, was added in EE2.

category imprint: Differences between sources

issues: EE revisions , Errors in EE