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b. 58

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

..

In the main text we add a cautionary  to d2. By contrast, we omit the unjustified (cautionary?) flats to a and a1, present in the sources.

category imprint: Editorial revisions

b. 59-62

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

..

In the main text we add cautionary flats to b in bar 59 and 61 and naturals to d1 in bar 60 and 62. By contrast, we omit the poorly justified  to a at the beginning of bar 62.

category imprint: Editorial revisions

issues: Cautionary accidentals , Last key signature sign

b. 65

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

f2 in A

f3 in GE (→FE,EE,IE)

..

It is difficult to say whether the earlier starting point of the octave sign in the editions resulted from a mistake or from a revision in GE. The mistake is supported by the absence of a corresponding correction in the recapitulation (bar 225), whereas the revision – by the pianistic ease of the changed version, in which the hand is to be moved not under the slur, but after the note provided with the staccato mark. Anyway, the A version does not contain a mistake, since this is how Chopin wrote this place twice – here and in bar 225. Such large intervals provided with a slur are to be found in other pieces by Chopin, cf., e.g. the Concerto in E minor, Op. 11, I mov., bar 391

category imprint: Differences between sources

issues: Errors in GE , GE revisions

b. 65

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

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In FE the octave sign ends on the 5th quaver in the bar (c3-f3), which is the engraver's patent mistake.

category imprint: Interpretations within context; Differences between sources

issues: Errors in FE

b. 74

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

category imprint: Differences between sources

issues: Errors in FE , GE revisions , Abbreviated octaves' notation