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


Pitch

b. 255

composition: Op. 19, Bolero

..

FE (→GE,EE) has a cas the 2nd semiquaver. It is a typical Terzverschreibung error of the engraver (or perhaps of Chopin in the Stichvorlage for FE). Chopin corrected the erroneous note in pencil in FES.

category imprint: Differences between sources; Editorial revisions

issues: Annotations in teaching copies , Errors in FE , Errors in EE , Errors in GE , Terzverschreibung error , Annotations in FES

b. 256-257

composition: Op. 19, Bolero

..

In FE, there are visible traces of removal of superfluous cautionary  next to all bin bars 256 and 257. The signs were probably removed in the first proofreading of FE, since they are absent both in GE and EE (cf. bars 254-255).

category imprint: Source & stylistic information

issues: Cautionary accidentals , Authentic corrections of FE , FE revisions

b. 259

composition: Op. 19, Bolero

A-e-a in FE (→EE)

A-a in GE

..

In GEis missing in the 1st chord, probably by mistake. 

category imprint: Differences between sources

issues: Errors in GE