Issues : Rhythmic errors

b. 57

composition: Op. 29, Impromptu in A♭ major

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The illogical and erroneous notation of the last third in A ‒ 2 voices, in the upper one a crotchet, in the lower one a quaver ‒ is probably a result of a carelessly introduced correction.
The note gat the beginning of the bar was originally a doubly dotted minim, while the quaver a1 would complete the rhythm of the lower voice. It can be assumed that Chopin was ending the notation of the upper c2, as his attention was drawn by the issue of the L.H. which overlapped the g1 note, which is held during almost the entire bar. He decided to shorten it and as a consequence he forgot to finish the last quaver. 

category imprint: Interpretations within context; Corrections & alterations

issues: Rhythmic errors

b. 59

composition: Op. 30, Mazurka in D♭ major

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In FE, in the top voice the double dotted crotchet is followed by a quaver. A comparison with analogous bar 63, and above all the FC (→GE) version, prove that the value of the last note is erroneous, since it is to be a semiquaver. An adequate correction was introduced in EE.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , Rhythmic errors

b. 60

composition: Op. 11, Concerto in E minor, Mvt III

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GE features an erroneous rhythm on the 2nd quaver of the bar, i.e. ​​​​​​​ – one beam is missing.

category imprint: Interpretations within context; Differences between sources

issues: Errors in GE , Rhythmic errors

b. 60

composition: Op. 2, Variations, complete

Semiquavers in AsI

Crotchet & demisemiquavers in A (→GEFE,EE,FESB)

category imprint: Interpretations within context; Differences between sources; Corrections & alterations

issues: Rhythmic errors , Main-line changes , Errors repeated in GE , Errors repeated in FE , Errors repeated in EE

b. 62

composition: Op. 2, Variations, complete

Semiquavers in AsI, contextual interpretation

Crotchet & demisemiquavers in A (→GEFE,EE,FESB)

category imprint: Interpretations within context; Differences between sources; Corrections & alterations

issues: Cautionary accidentals , Omission of current key accidentals , Rhythmic errors