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Op. 12, Variations in B♭ major

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b. 16-17

composition: Op. 12, Variations in B♭ major

No slur in FE (→GE,EE)

Slur suggested by the editors
..

It seems unlikely that the absence of a slur over the three-note descending chromatic motif could have been related to a change in articulation. Therefore, in the main text we suggest a slur filling the gap in the coherent phrasing in the adjacent bars.

category imprint: Editorial revisions

b. 16

composition: Op. 12, Variations in B♭ major

..

In the main text we omit the most probably authentic – it is present in all sources – but unjustified cautionary  to g.

category imprint: Editorial revisions

issues: Cautionary accidentals

b. 17

composition: Op. 12, Variations in B♭ major

Dotted rhythm in FE (→EE)

Semiquavers in GE
..

The missing dotted rhythm in GE seems to be neither the engraver's mistake nor the edition's revision. Chopin probably introduced it into FE (→EE) after having sent the GE basis. Taking into account the fact that the authenticity of the GE version is highly likely, it can be regarded as a fully-fledged variant. 

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE , Dotted or even rhythm

b. 17

composition: Op. 12, Variations in B♭ major

..

In the main text we include the cautionary  to e, added in GE2.

category imprint: Differences between sources; Editorial revisions

issues: GE revisions

b. 18

composition: Op. 12, Variations in B♭ major

Quaver & dotted crotchet in FE (→GE1)

Quaver in EE

Quaver & crotchet in GE2
..

It is difficult to say whether the EE version resulted from the engraver's mistake or whether Chopin added a crotchet stem and an augmentation dot to d1 in the last stage of proofreading FE (→GE1), yet this correction was not marked in the copy that served as the basis for EE.
The absence of the dot in the GE2 copy presented in our system is most probably due to a defect related to the change of the printing technique, from copperplate engraving to lithography.

category imprint: Differences between sources

issues: Errors in GE , Authentic corrections of FE