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b. 1-6

composition: WN 17, Polonaise in B♭ major

..

In JC, the components of some out of the two-part written chords in the R.H. are linked with an additional stem. It is entirely clear in the case of the chords on the 2nd beat of bars 1-3 and the last chord in bar 5; the notation of the chords on the 2nd beat of bars 5-6 is less precise. It is hard to determine if it corresponds to the notation of [AI], yet such a possibility cannot be excluded. Assuming a possible authenticity of this notation, there arises a problem of its interpretation: in the case of chords on the 2nd beat of the bar, a common stem may indicate an incorporation of the lower note of the third to the 1st quaver of the lower voice or, on the contrary, an extension of the 1st quaver. In the editions, there are no traces of this notation detail.

category imprint: Source & stylistic information

b. 1

composition: WN 17, Polonaise in B♭ major

No repeat sign in JC & EF

Repeat sign in EF

..

The repetition of bars 1-24 is marked only in EF. While the repetition of the initial segment of the Polonaise seems to be justified, the way it is notated – beginning the repeated segment at the start of bar 1 and two voltas of final bar 24 – is probably non-authentic.

category imprint: Differences between sources

b. 1

composition: WN 17, Polonaise in B♭ major

in JC & PE

in FEF

in GEF

..

The number in the title of the piece in EF refers to the position of the Polonaise in the collection of three polonaises created by Fontana, published as one book as a part of the edited by him posthumous Chopin's works (in FEF the book was marked as Op. 71). In the main text we do not consider this non-authentic numbering. 

category imprint: Differences between sources

b. 3-4

composition: WN 17, Polonaise in B♭ major

Few octaves in JC

No octaves in EF

Octaves in PE

..

From the musical point of view, the version of JC seems to be very dubious: the indication [con] 8 - - - is probably written in a wrong place – it was supposed to include the entire bass progression in bar 4. However, most probably we are dealing here with a misunderstanding of the corrections of the entire introduction (bars 1-8) written in a short cut manner in [AI]. The same applies to the version of EF

In EF there are no rests at the end of bar 4, as the phrase ends with a crotchet (in the parts of both hands).

category imprint: Differences between sources

issues: Errors of JC

b. 3

composition: WN 17, Polonaise in B♭ major

in JC

G1-G in EF

B1-B in PE

..

Using a chord without third at the beginning of the bar, as it is both in JC and in EF, raises doubts as to the correctness of Chopin's notation reading in [AI]. However, even if that version was intended by Chopin in any stage, later it was replaced by the musically smoother version of PE

category imprint: Differences between sources