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. 46

composition: Op. 25 No 11, Etude in A minor

a2 in GC (→GE1) & FE (routine interpretation), EE & GE2 (→GE3)

a2 in GC (→GE1) & FE (contextual interpretation)

..

Before the 5th, 15th, 19th and 23rd semiquaver in GC (→GE1) and FE there is no accidental, so all of them should be interpreted as a2. In the 2nd half of the bar it is certainly erroneous, which induced the reviser of GE2 (→GE3) to consider the whole bar as an example of overlooking the sign of the current key and adding a  already next to the first of the aforementioned notes. A flat in this place is present also in EE, which could generally correspond to Chopin's notation in the base text to this edition. According to us, it is, however, more likely that in EE we are also dealing with an intervention of the reviser:

  • in a similar melodic turn in bar 48 the 5th semiquaver is an e2, moreover, in the sources there is no  returning e2 in the 2nd half of the bar;
  • Chopin undoubtedly heard a2 only in the 2nd half of the bar, where it is obvious due to A in the bass. Therefore, the first half of the bar could have been written faultlessly, although in a confusing manner, if we take into consideration the A major key, reaffirmed in the previous bar.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , GE revisions , Omission of current key accidentals

b. 47

composition: Op. 25 No 11, Etude in A minor

g in GC (→GE) & EE3

No g in FE & EE1 (→EE2)

..

The crotchet, which in this context has to be, of course, interpreted as g (a relevant  was added in GE), was added by Chopin in GC (→GE). We adopt this version to the main text, removing the unnecessary in this situation  before the last semiquaver of the bar. Through GE, the completed version was transmitted to EE3

category imprint: Interpretations within context; Differences between sources; Corrections & alterations

issues: Omission of current key accidentals , Authentic corrections in GC

b. 47

composition: Op. 25 No 11, Etude in A minor

Octave in GC, FE & EE

Only B1 in GE1

Octave with naturals in GE2 (→GE3)

..

The missing note in GE1 is almost certainly a mistake, corrected in GE2 (→GE3) together with adding – necessary in our opinion – cautionary naturals next to this crotchet.

category imprint: Differences between sources

issues: Errors in GE , GE revisions

b. 47

composition: Op. 25 No 11, Etude in A minor

..

Due to the sudden change of key, in the main text we add cautionary naturals before b2 , a2 and e3

category imprint: Editorial revisions

b. 48

composition: Op. 25 No 11, Etude in A minor

..

The natural returning e2 is present only in GE and EE3. There is no doubt that we are dealing with Chopin's oversight.

category imprint: Differences between sources

issues: EE revisions , Omissions to cancel alteration , GE revisions