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Op. 12, Variations in B♭ major

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b. 143

composition: Op. 12, Variations in B♭ major

..

In the main text we omit the cautionary  to d1, present in all sources. Chopin probably inserted it due to d1 in the next bar, yet the change of mode had already been indicated by the change of g1 to g1, hence the notation of both bars should be clear.
Two notes later we also omit the unnecessarily repeated  to e1.

category imprint: Editorial revisions

issues: Cautionary accidentals

b. 144

composition: Op. 12, Variations in B♭ major

..

In the main text we omit the naturals to e1 and a1 in the last sextuplet, unnecessarily repeated in all sources.

category imprint: Editorial revisions

issues: Cautionary accidentals

b. 148

composition: Op. 12, Variations in B♭ major

d2 in FE, literal reading

d2 in FE, possible interpretation

c2 in GE & EE
..

The d2 note present in FE (or d2 , if we assume that Chopin could have forgotten to cancel the alteration, which was quite common) is most probably a mistake – cf. bar 172, which includes a variation of the discussed place, in which the final 4 semiquavers belong to an F chord. This is how it was assessed in GE and EE, changing d2 to c2 (in GE perhaps at Chopin's request), and this is the version we adopt to the main text.

category imprint: Differences between sources; Editorial revisions

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

b. 153

composition: Op. 12, Variations in B♭ major

Triad g1-b1-d2 in FE

Fifth g1-d2 in GE & EE
..

Neither GE nor EE include b1, which means that it was almost certainly added by Chopin in the last stage of proofreading FE – after the copies serving as the bases for GE and EE had been sent. It was most probably a correction in the strict sense – the omission of this note was just a mistake.

category imprint: Differences between sources

issues: Authentic corrections of FE

b. 153

composition: Op. 12, Variations in B♭ major

d2 in chord in FE (→EE)

c2 in chord in GE
..

Both versions are musically satisfying, in all respects; we cannot say anything definitive about possible corrections either – two possibilities could be likely: a change in the last stage of proofreading FE (→EE) and possible Chopinesque proofreading of GE. On the other hand, one cannot exclude a mistake by the GE engraver, who could have considered the middle notes of the last two chords to be identical (the discussed note is placed in FE too low). In the main text we provide the undoubtedly authentic FE version, perhaps the latest one. The GE version can be regarded as a potentially authentic variant.

category imprint: Differences between sources

issues: Authentic corrections of FE , Authentic corrections of GE