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b. 4

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

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In CLI and EE2 the  returning d1 on the 4th beat of the bar was deleted, which is a patent error. In CLI there is a superfluous  before gin this chord, which shows that Chopin did not include in the notation the previous alterations in this bar at all. Similarly in bar 12. 

category imprint: Interpretations within context; Differences between sources

issues: Errors in EE , Omissions to cancel alteration , Errors of CLI

b. 4

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

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In the main text we do not consider  written in Ap, as in comparison with this manuscript, Chopin significantly reduced the number of dynamic markings in the version prepared for printing.

category imprint: Differences between sources

b. 4

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

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In one of later proofreadings of FE (→GE,EE), Chopin added the slur combining and (it is absent in FEcor). Similarly in bars 12 and 39. In Ap the slur is present only in bar 4.

category imprint: Differences between sources

issues: Authentic corrections of FE

b. 4

composition: Op. 10 No 11, Etude in E♭ major

No e in chord in A

Chord with e in FE (→GE,EE)

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The origin of the additional e note present in the 1st chord in the bar in FE (→GE,EE) is unclear. Chopin could have added it at the time of proofreading FE, yet it seems more plausible that it was printed by mistake instead of (Terzverschreibung) or B (the second possibility is indicated by the length of the arpeggio wave). Then the correct note was added, yet the erroneous one was not deleted, which is a characteristic error of engravers (the then printing technique made adding a note much easier than deleting it). Similar mistakes were often committed in other Chopin's works, e.g., in the Scherzo in B minor, Op. 20, bars 135 and 292, the Ballade in G minor, Op. 23, bar 171 and the Polonaise in A major, Op. 40 No. 1, bar 93. Cf. the remark concerning the Etude in G major, No. 5, bar 59.   

category imprint: Differences between sources

issues: Errors in FE , Errors resulting from corrections , Terzverschreibung error , Authentic corrections of FE

b. 4-12

composition: Op. 10 No 11, Etude in E♭ major

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In A in bar 4 (and bar 12, which repeats this bar) the  hairpins embrace with their range the 2nd and 3rd chords in the bar. This is how it was more or less reproduced in FE, yet minor inaccuracies caused that in GE the sign in bar 12 was given a form of an accent, while in EE in both bars it was printed one quaver too early.

category imprint: Differences between sources

issues: Inaccuracies in GE , Inaccuracies in FE , Scope of dynamic hairpins , EE inaccuracies