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b. 1

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

 in A (→FCGE)

 in FE (→EE)

..

The  marking present in FE (→EE) instead of the authentic  indication must have resulted from the engraver's carelessness – see the Prelude in E minor no. 14.

category imprint: Differences between sources

issues: Errors in FE , 4/4 or 2/2

b. 1

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

Fingering written into FED

No teaching fingering

..

In the main text, we include the fingering coming from Chopin, and written into FED.

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FED

b. 1-6

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

..

In A we can see that the pairs of chords in b. 1-2 and 5-6 were initially provided with staccato dots and not slurs. In b. 1 the dots were deleted and replaced with a slur; in the remaining ones, Chopin wrote the slurs in a way so as to cover the dots.

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A

b. 1

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

..

In A we can see the initial tempo indication having been deleted – Presto con fuoco.

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A , Changes of tempo markings

b. 1-2

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

..

In A in both bars Chopin wrote and then crossed out the flats (cautionary?) before the 1st d quaver.

category imprint: Corrections & alterations; Source & stylistic information

issues: Cautionary accidentals , Deletions in A , Last key signature sign