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. 7

composition: Op. 10 No 4, Etude in C♯ minor

in AI

No marking in FE (→GE,EE)

..

 in AI was almost certainly intentionally overlooked in the printed version.

category imprint: Differences between sources; Corrections & alterations

b. 7-8

composition: Op. 10 No 4, Etude in C♯ minor

No ties in AI

Ties in FE (→GE,EE)

..

The chords with repeated d2 and d1 notes are undoubtedly an earlier version of this place. The corrections of AI suggest that originally the first pair of chords had also c2 notes on the 2nd beat and b1 on the 3rd beat, which excluded the hold (if the d2 notes were present in this version at all).

category imprint: Differences between sources; Corrections & alterations

b. 7

composition: Op. 25 No 1, Etude in A♭ major

 in AI

No markings in A (→GE), FE & EE

..

The pedal change written in AI was overlooked in A. Cf. bar 1.

category imprint: Differences between sources; Corrections & alterations

b. 7

composition: Op. 25 No 1, Etude in A♭ major

 in AI, GE, FE & EE

Earlier  in A

..

The corrections of placing the  sign at the end of the bar, visible in A, do not prove, according to us, an intention of an earlier pedal release in this place. Chopin most probably wrote the sign already after the bar line (at the end of the line) and, in order to avoid misunderstandings, he wanted to place it precisely at the end of the bar, yet, as a result of deletions, an illegible inkblot was created. Considering the harmonic pedalling including the entire beats of the bar to be obvious, the composer wrote the necessary sign slightly earlier, at a safe distance from – probably fresh – stain. In GE, the sign was reproduced at the end of the bar and it is also AI, FE and EE that prove the correctness of this way of placement.

category imprint: Differences between sources; Corrections & alterations

issues: Deletions in A

b. 7

composition: Op. 25 No 1, Etude in A♭ major

No signs in AI, CDP, A (→GE1), EE & GE3

  in FE & GE1a (→GE2)

..

The pair of hairpins was added by Chopin in a proofreading of GE1a (→GE2). The signs are also in FE, perhaps also added at the time of proofreading. In GE3 they were removed as part of comparing the compatibility of this edition with the original handwritten base text (A).

category imprint: Differences between sources; Corrections & alterations

issues: GE revisions , Authentic corrections of GE