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. 38

composition: Op. 10 No 3, Etude in E major

..

The bottom note of the 2nd semiquaver is written in AI as e, while before the bottom note of the next semiquaver there is no  returning e. In the context of a more precise notation of the later sources, the lack of  must be considered as a mistake, in spite of the fact that from the purely harmonic point of view, the version with the repeated e would not be entirely impossible (although rather not in the stylistics of young Chopin, who showed a clear preference for diminished four-note chords). In A one can see traces of change of this e to f. Cf. the Prelude in C minor, Op. 45, bar 79

category imprint: Differences between sources; Corrections & alterations

issues: Enharmonic corrections

b. 38

composition: Op. 10 No 3, Etude in E major

..

Before the top note on the 7th semiquaver, the  returning f is only in GE4 (→GE5). It means the sound of f in AI and in the aforementioned GE, and in the remaining sources. However, there is no doubt that the missing  is Chopin's oversight, related to the correction on the 2nd semiquaver.

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration , Errors resulting from corrections , GE revisions , Errors of A

b. 41

composition: Op. 10 No 3, Etude in E major

C in AI & A (→FEEE2EE3)

C in GE & EE4

in FED

..

The natural lowering C to C was written in FED in pencil probably by Chopin. It does not look like a correction of a previous error, therefore, one can consider this version as an authentic variant. In the main text we add a cautionary  before C; the addition was already introduced in GE and EE4

category imprint: Differences between sources; Editorial revisions; Corrections & alterations

issues: Annotations in teaching copies , Annotations in FED

b. 41-42

composition: Op. 10 No 3, Etude in E major

..

In order to facilitate the interpretation of the chromatic progressions, we add a number of cautionary and reminding signs. All appear in the sources, although neither of them has all signs.

category imprint: Differences between sources; Editorial revisions

issues: Cautionary accidentals

b. 41

composition: Op. 10 No 3, Etude in E major

..

AI lacks a few accidentals cancelling the previous alterations – on the 3rd semiquaver in the bar  a2, on the 7th semiquaver  G, on the 8th semiquaver  F. The regular structure of figurations causes that all these situations can be considered as obvious oversights.

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration