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b. 152

composition: Op. 22, Polonaise

..

In FE, there are no naturals before the bottom voice d1/2/3 notes. The last one is absolutely necessary; in spite of that, it was not added in any of the subsequent editions, in which the additions were limited to a  before d1 at the beginning of the bar. Moreover, FE (→GE) are lacking in the  before c3 in the 2nd figure; the accidental was added in EE. Significantly, the previous note, d3, is preceded with a , which was apparently understood as a cautionary accidental due to the d notes in the bottom voice and in the L.H. 

category imprint: Interpretations within context; Differences between sources; Editorial revisions

issues: EE revisions , Accidentals in different octaves , Inaccuracies in FE , GE revisions , Cautionary accidentals , Errors repeated in GE , Errors repeated in EE

b. 152

composition: Op. 23, Ballade in G minor

..

We add a cautionary  before f2 in the main text.

category imprint: Editorial revisions

b. 152

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

c2 w A

c2 in GE (→FE,EE,IE)

..

The version featuring c2 introduced by GE (→FE,EE,IE) must be erroneous. Bars 151-153 are filled with a dialogue between diatonic motifs in the keys of E minor/G major, setting the stage for the transition towards the key of D major abounding in altered leading tones (bars 154-155). Nothing suggests that Chopin would have wanted to disrupt the tonal stability with a temporary allusion to the key of B minor already in the discussed bar.

category imprint: Differences between sources

issues: GE revisions

b. 152-153

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

..

In A Chopin omitted a few necessary accidentals – in bar 152 the flats to g2 at the beginning of the bar, to D and to c3, while in bar 153 the  to g1 and the  to A. All of them were added in GE (→FE,EE,IE).

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , GE revisions , Omission of current key accidentals , Inaccuracies in A

b. 152

composition: Op. 12, Variations in B♭ major

5 digits, last one 2 in FE

5 digits, last one 1 in GE

4 digits in EE

..

As in the preceding bar, in EE a completely apparent fingering digit was added over the 2nd semiquaver. On the other hand, two other digits were omitted in the ending of this phrase. The erroneous digit in GE could be explained by the engraver's mistake or, which seems more likely, by a later correction of a mistake committed first in FE and repeated in GE.

category imprint: Differences between sources

issues: EE revisions , Errors in EE , Errors in GE , Authentic corrections of FE