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b. 5

composition: Op. 28 No. 17, Prelude in A♭ major

g2 in FCI & A (→FC,FEEE)

f2 in GE1

g2 with  in GE2 (→GE3)

..

The version of GE1 featuring f2 on the 3rd quaver is most probably a mistake of the engraver. In GE2 f2 was rightly changed to g2; at the same time, a cautionary  was added before the latter. We include this addition, which we find justified, in the main text.

category imprint: Differences between sources; Editorial revisions

issues: Errors in GE , GE revisions

b. 5

composition: Op. 28 No. 17, Prelude in A♭ major

Triads in FCI & A (→FC,FEEE)

Thirds in GE

..

The missing a notes in the chords in the 2nd half of the bar are a mistake of the engraver of GE.

category imprint: Differences between sources

issues: Errors in GE

b. 5

composition: Op. 28 No. 17, Prelude in A♭ major

..

EE overlooked the  sign.

category imprint: Differences between sources

issues: Errors in EE

b. 5

composition: Op. 28 No. 18, Prelude in F minor

..

We add cautionary flats before b(1) at the beginning of the bar.

category imprint: Editorial revisions

b. 5

composition: Op. 28 No. 20, Prelude in C minor

..

We add a cautionary  before a1 in the main text.

category imprint: Editorial revisions