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b. 9

composition: WN 17, Polonaise in B♭ major

..

In JC, FEF, and PE, the 5th quaver is not extended to the value of a crotchet. It is certainly a mistake (the notation's inaccuracy), as the necessity to extend stems from the presence of the tie sustaining this note to the minim in bar 10. Moreover, in JC, the last quaver, f1, is written erroneously in a two-part form. FEF has a correct notation.

category imprint: Source & stylistic information

issues: Errors of JC , Errors in PE , Errors in Fontana's editions , Fontana's revisions

b. 9

composition: WN 17, Polonaise in B♭ major

Quavers in JC & EF

Dotted rhythm in PE

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On the 3rd beat of the bar we give a dotted rhythm after PE, based on the later autograph – [A].

category imprint: Differences between sources

issues: Dotted or even rhythm

b. 9

composition: WN 17, Polonaise in B♭ major

..

In JC and EF, there is a  before the last a1. This unjustified in this context sign is not included in PE. Similarly in bar 36.

category imprint: Source & stylistic information

issues: Cautionary accidentals

b. 10-11

composition: WN 17, Polonaise in B♭ major

No signs in JC

Hairpins in EF

Our suggestion

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Three dynamic markings given in the main text without brackets come from PE. The  hairpins in bar 10 appear in EF. We propose to consider them, as a relevant sign is in PE in analogous bar 18. In JC, there are no performance markings here. 

category imprint: Interpretations within context; Differences between sources

b. 10-18

composition: WN 17, Polonaise in B♭ major

Quaver d1 in JC

Quaver d1 in EF

Minim in PE

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The extension of the note din bars 10 and 18, marked only in PE, is a typical Chopin's ploy. In bar 18 of this edition, an equivalent notation was applied, showing exactly the voices' coincidence. The notation may have resulted from a misunderstanding of the notation of [A], hence in both places we give the simplest notation used in bar 10.

The lower note of the sixth, f, is a quaver in JC, which is a patent inaccuracy in relation to the tie sustaining it into on the 3rd beat of the bar (see the next remark). According to us, it is yet probable that it corresponds to the notation of [AI] and illustrates the process of gradual improvement of the notation from bare quavers to the precise notation of ties of some of the notes. 

category imprint: Differences between sources

issues: Errors of JC