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b. 255

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

b-b in A, amended version

b-b in A (original version, contextual interpretation) & GE (→FE,EE,IE)

..

The version of the 2nd half of the bar in A, pianistically and harmonically questionable, is probably an example of a "correction" (the change of  to , probably performed in a hurry), which resulted in a greater mistake than the one that was supposed to be corrected – the absence of the  restoring b on the 5th quaver. The initial notation reveals that Chopin approached this place in the same way as he did with the similar situations in bar 254 (as well as 250 and 253), where the flats, although undoubtedly necessary, are only of a cautionary nature.
In GE (→FE,EE,IE) the initial text was restored, supplemented by the necessary

category imprint: Interpretations within context; Differences between sources

issues: Corrections in A , Errors resulting from corrections , GE revisions , Foreign hand additions in manuscripts , Deletions in A

b. 257-265

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

No slurs in sources

2 slurs suggested by the editors

..

In the main text we suggest slurs modelled on the ones precisely marked by Chopin in the analogous phrases in bars 56-64.

category imprint: Editorial revisions

b. 259-260

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

..

In A in both bars Chopin omitted the naturals restoring f3. The accidentals were added in GE (→FE,EE,IE).

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration , GE revisions , Errors of A

b. 259

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

..

In the main text we include the cautionary  to e3 added in GE (→FE,EE,IE).

category imprint: Differences between sources; Editorial revisions

issues: GE revisions

b. 259-263

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

No fingering in A (→GEFE,IE)

Fingering in bars 259 & 263 in EE

..

In the main text, we do not include the inauthentic R.H. fingering added by EE.

category imprint: Differences between sources

issues: EE revisions