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b. 87

composition: Op. 12, Variations in B♭ major

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In FE the return to the bass clef in the L.H. from the beginning of bar 87 was omitted. The mistake was corrected in GE and EE.

category imprint: Editorial revisions

issues: EE revisions , Errors in FE , GE revisions

b. 91-92

composition: Op. 12, Variations in B♭ major

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In the main text, we omit the cautionary naturals at e in bar 91 and f in bar 92. In FE (→EE) both appear, while in GE only the first one is left.

category imprint: Differences between sources; Editorial revisions

issues: GE revisions , Cautionary accidentals

b. 93

composition: Op. 12, Variations in B♭ major

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At the beginning of the bar in the main text we add a cautionary  to f in the L.H. and omit the unjustified  (cautionary?) to e1.

category imprint: Editorial revisions

issues: Cautionary accidentals , Last key signature sign

b. 94-96

composition: Op. 12, Variations in B♭ major

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In FE (→GE1) the flats restoring b1 in the 2nd half of bar 94 and 96 are missing. The patent oversights, typical of Chopin, were corrected in EE and GE2.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , Omissions to cancel alteration , GE revisions , Errors repeated in GE

b. 96

composition: Op. 12, Variations in B♭ major

..

In FE the  at the beginning of the bar was placed too low, next to a1, which does not require an accidental. However, the patent mistake was corrected only in GE

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , Errors in GE , GE revisions , Authentic corrections of GE , Errors repeated in EE