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. 18

composition: Op. 26 No 2, Polonaise in E♭ minor

..

The sources have cautionary flats next to c2 in the L.H. and c3 on 4th semiquaver in the R.H. Furthermore, in A – similarly to bar 17 –  next to c3 is repeated before the following crotchet.

category imprint: Differences between sources; Editorial revisions

issues: Cautionary accidentals , Last key signature sign

b. 18

composition: Op. 26 No 2, Polonaise in E♭ minor

Crotchets in A

Quavers in FE (→GE,EE)

..

As in bar 17 the stems extending the sound of the 2nd and 4th quavers occur only in A.

category imprint: Differences between sources

issues: Inaccuracies in FE

b. 20

composition: Op. 26 No 2, Polonaise in E♭ minor

Slur in A

No slur in FE

Slur in GE i EE

..

The absence of the R.H. slurs in FE (except for the first, under the semiquavers) is most probably a side effect of changes to the layout of the R.H. part. These changes, introduced in print, comprised all instances of this bar (bars 20, 68 and 124), but a slur over the upper voice, which probably should have appeared each time, is only printed in bar 124, owing to the engraver's negligence or Chopin's inadvertence. In the editors opinion the slur was meant to replace the slur in the lower voice, written in A. In GE and EE the slur over the upper voice was also reproduced in bars 20 and 68 (in GE Chopin's inspiration cannot be excluded). Cf. note regarding the L.H. part.

category imprint: Differences between sources; Editorial revisions

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

b. 20

composition: Op. 26 No 2, Polonaise in E♭ minor

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Authentic corrections of FE

b. 20

composition: Op. 26 No 2, Polonaise in E♭ minor

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A