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b. 3

composition: Op. 10 No 1, Etude in C major

No F1 in CLI

Octave in FE (→GE,EE

..

The lack of the lower octave in CLI is certainly an oversight. See bars 4-11.

category imprint: Differences between sources

issues: Errors of CLI

b. 3

composition: Op. 10 No 1, Etude in C major

No fingering in CLI

Fingering in FE (→GE)

Additional fingering in EE

..

The fingering given in the main text, drawn from FE (→GE), is certainly authentic. In EE it was completed with digits added by Fontana, which, in this case, describes an alternative fingering.

category imprint: Differences between sources

issues: EE revisions

b. 3-4

composition: Op. 10 No 2, Etude in A minor

Semiquavers in CLIFE (→GE,EE

Semiquavers & crotchets in Ap

..

In Ap the rhythmic values of subsequent two-note chords of the lower voice in the R.H. create in those bars (as well as in subsequent repetitions) an alternating short-long scheme (semiquaver-crotchet). Sometimes the resounding length contrast is additionally underlined with accents. In the main text we give the homogenous, as far as the sound is concerned, version of FE (→GE,EE). 

category imprint: Differences between sources; Corrections & alterations

issues: Chopin's hesitations , Accompaniment changes

b. 3

composition: Op. 10 No 2, Etude in A minor

No mark in FE (→GE,EE

Probable  in Ap

Possible long accent in Ap

..

It is not clear how to understand the signs shaped in the form of accents visible in Ap at the end of bars 3 and 4. Therefore, in both places we offer alternative interpretations. A similar problem appears in analogous bars 11-12, 38 and 39.

category imprint: Graphic ambiguousness; Interpretations within context; Differences between sources

issues: Long accents

b. 3-4

composition: Op. 10 No 12, Etude in C minor

Slurs in A, literal reading

Slur in FE (→GE,EE

..

We present the literal interpretation of the slurs included in A, however, there is no doubt that Chopin considered this notation to be equal to one slur, as in bars 1-2. A similar hesitation, concerning the choice of space for leading the slur, is visible also in bars 41-42.
In GE2 (→GE3GE4) the end of the slur was moved to the beginning of bar 5, which is a patent error.

category imprint: Interpretations within context; Differences between sources

issues: Inaccuracies in GE , Inaccurate slurs in A , Authentic corrections of FE