Select: 
Category
All
Graphic ambiguousness
Interpretations within context
Differences between sources
Editorial revisions
Corrections & alterations
Source & stylistic information
Notation
All
Pitch
Rhythm
Slurs
Articulation, Accents, Hairpins
Verbal indications
Pedalling
Fingering
Ornaments
Shorthand & other
Importance
All
Important
Main


b. 55-56

composition: Op. 28 No. 21, Prelude in B♭ major

No fingering in A (→FE,FCGE)

Fingering in EE

..

As is the case with the entire Prelude, nothing indicates that the fingering added in EE could be authentic.

category imprint: Differences between sources

issues: EE revisions

b. 55

composition: Op. 28 No. 21, Prelude in B♭ major

c in A (→FC,FEEE) & GE2 (→GE3)

B in GE1

..

The version of GE1 must be erroneous; it was corrected in GE2 (→GE3).

category imprint: Differences between sources

issues: Errors in GE , GE revisions

b. 57

composition: Op. 28 No. 21, Prelude in B♭ major

Fingering written into FES

No teaching fingering

..

In the main text we give the fingering digit entered most probably by Chopin into FES. According to us, the entry may be interpreted as an indication that the note should be performed either with the left or the right hand.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , Annotations in FES

b. 57

composition: Op. 28 No. 21, Prelude in B♭ major

  in A (→FCGE)

No markings in FE (→EE)

..

The absence of pedal markings is an oversight by the engraver of FE (→EE).

category imprint: Differences between sources

issues: Errors in FE

b. 58-59

composition: Op. 28 No. 21, Prelude in B♭ major

..

FE1 omitted the c1 and b notes isolated from the R.H. chords. The mistake was rectified in FE2 (→EE); however, the notation of A was not reproduced accurately – the added notes do not constitute a separate voice, continuing the d1 crotchet from b. 57.

category imprint: Differences between sources

issues: Errors in FE , Inaccuracies in FE , FE revisions