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b. 56

composition: WN 17, Polonaise in B♭ major

..

In JC, the  before the chord on the 4th quaver is on the level of d1.

category imprint: Source & stylistic information

issues: Inaccuracies in JC

b. 57

composition: WN 17, Polonaise in B♭ major

g3 in JC & EF

e3-g3 in PE

..

PE has the e3-gthird as the 2nd quaver of the bar. Admittedly, the version is acceptable, as far as the sound and piano performance are concerned, yet the enote burdens and blurs unnecessarily the melody's line; therefore, a misreading of [A] or a proofing (adding the correct note without deleting the wrong one) seem to be much more probable.  

category imprint: Interpretations within context; Differences between sources

issues: Terzverschreibung error , Errors in PE , Partial corrections

b. 57

composition: WN 17, Polonaise in B♭ major

..

The version of PE is an unquestionable improvement introduced by Chopin into [A]

category imprint: Differences between sources

issues: Accompaniment changes

b. 58

composition: WN 17, Polonaise in B♭ major

PE, articulation marks interpreted

..

It is unclear what is the origin of the difference between versions of JC and EF, yet they are probably earlier than the version of PE, which we adopt for the main text. In the latter, thanks to a simplified texture, Chopin emphasises the descending phrase in bar 58 (repeated imitatively in bar 59), as well as avoids some complications in voice-leading (parallel sevenths).

category imprint: Differences between sources

issues: Accompaniment changes

b. 58

composition: WN 17, Polonaise in B♭ major

d1 in JC & EF

c1 in PE

..

Change of d1 into c1 is an undeniable improvement here, introduced into [A] (→PE).

category imprint: Differences between sources

issues: Enharmonic corrections