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b. 20

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

Slur in A (→GEFE,IE)

No slur in EE

..

The missing slur must be an oversight by the EE engraver.

category imprint: Differences between sources

issues: Errors in EE

b. 21

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

leggier. in A

leggier. in GE (→FE)

leggiero in EE

legger. in IE

..

In the main text we keep the Chopinesque abbreviation and its position in A (we only correct the manifest orthographic error – one 'g' is missing). There is no reason for moving the indication to the beginning of the bar, as it was done in GE (→FE,EE,IE). Writing the abbreviation in full in EE was rational, although it is highly likely that it does not exactly correspond to Chopin's intention – see the note on this abbreviation in the Variations in B, Op. 12, bar 14.
In IE the indication's orthography was modernised – cf. the Concerto in F minor, Op. 21, mov. III, bar 81.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , GE revisions , Errors of A ,

b. 21

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

 in GE (→IE)

in FE & EE

..

The shifted  hairpin in FE and EE is a typical example of marks being adjusted to rhythmic structures, in this case a demisemiquaver beam. 

category imprint: Differences between sources

issues: EE revisions , Scope of dynamic hairpins , FE revisions

b. 21

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

No fingering in A (→GEFE,IE)

Fingering in EE

..

In the main text we omit the inauthentic L.H. fingering added by EE.

category imprint: Differences between sources

issues: EE revisions

b. 22

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

No fingering in A (→GEFE,EE1,IE)

Fingering in EE2

..

In the main text we omit the inauthentic fingering added by EE2.

category imprint: Differences between sources

issues: EE revisions