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Rhythm

b. 36

composition: WN 17, Polonaise in B♭ major

Crotchet in JC (interpretation) & EF

Crotchet f-e1 in PE

..

The notation of JC is inaccurate: lack of extension of the rhythmic value of the quaver despite the tie holding it until the next bar. In EF, the notation was improved, yet it is only the notation of PE, based on the later autograph, that describes precisely the performance of this place intended by Chopin.

category imprint: Interpretations within context; Differences between sources

issues: Inaccuracies in JC

b. 36

composition: WN 17, Polonaise in B♭ major

..

The sources differ here in the notation of the rest for the part of the R.H.; JC has a crotchet rest, which certainly corresponds to the notation of [AI]. In PE, the crotchet rest is additionally extended with a dot, which is a patent error, however, it reveals that also in the case of [A], Chopin insisted on his simplified way of notation. Two quaver rests in EF are probably a result of Fontana's revision. 

category imprint: Interpretations within context; Differences between sources

issues: Errors in PE

b. 39-40

composition: WN 17, Polonaise in B♭ major

Tied third in JC & PE

No ties in EF

category imprint: Differences between sources

b. 41-42

composition: WN 17, Polonaise in B♭ major

g1 tied in JC & EF

No tie in PE

Our variant suggestion

category imprint: Differences between sources

b. 42

composition: WN 17, Polonaise in B♭ major

..

The digits determining the number of semiquavers in each of the two irregular groups are present only in PE.

category imprint: Differences between sources