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b. 206

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

..

In the main text we omit the cautionary  to a present in all sources, as well as the second one, added in GE (→FE,EE,IE) to A.

category imprint: Differences between sources; Editorial revisions

issues: GE revisions , Cautionary accidentals , Last key signature sign

b. 206

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

Crotchet f1 in A

Crotchet c1-f1 in GE

Crotchet c1 in FE, EE & IE

..

In GE the change of the stems' direction forced a change to the arrangement of voices on the 7th quaver in the bar. In the main text we keep the A notation, in which it is only f1 that is prolonged to a crotchet. The GE version, equally justified in terms of harmony, can be considered an acceptable variant. On the other hand, the versions of the remaining editions certainly distort Chopin's intention. 

category imprint: Differences between sources

issues: EE revisions , GE revisions , FE revisions ,

b. 206

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

from 3rd quaver in A & EE

 from 1st quaver in GE (→FE,IE)

..

The coincidence concerning the range of the  hairpin between A and EE is most probably accidental – the inaccuracy of the engraver of EE levelled out the action of the engraver of GE (→FE,IE), who prolonged the mark.

category imprint: Differences between sources

issues: Scope of dynamic hairpins , GE revisions , EE inaccuracies

b. 207

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

..

In the 2nd half of the bar A does not include an accidental to the 2nd R.H. quaver, which results in a. In the next two bars, in which the same figure is repeated an octave or two octaves higher, the respective notes are provided with naturals. Therefore, there is no doubt that in the discussed bar Chopin overlooked the . It was added in GE (→FE,EE,IE).
In the main text we do not include the  to the last L.H. quaver, f, added in GE (→FE,EE,IE) – in this layout it is superfluous.

category imprint: Interpretations within context; Differences between sources

issues: GE revisions , Omission of current key accidentals , Errors of A

b. 208-210

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

..

In A both accidentals in the L.H. part in bar 208 are missing; the 4 naturals in the R.H. part are missing as well, to b1 in bar 208, b2 in bar 209, b3 and a3 in bar 210. All the necessary accidentals were added in GE (→FE,EE,IE).

category imprint: Interpretations within context; Differences between sources

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