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b. 2

composition: Op. 45, Prelude in C♯ minor

Grace note in FE

No grace note in GE

Grace note with slur in EE

Our suggestion

..

The lack of the grace note in GE may result from the inattention of the engraver. A sligtly bigger gap between the two first crotchets of the bar may be interpreted as the space planned to accommodate that ornament. However, this is not at all certain, as uniform spacing between the notes is not strictly adhered to in GE. Therefore we offer a variant solution. The tiny slur in EE is certainly a routine addition of the editor. 

A similar situation occurs in the Etude in F minor Op. 10 no. 9, bar 64.

category imprint: Differences between sources

issues: Errors in GE

b. 12

composition: Op. 45, Prelude in C♯ minor

..

In FE1, a  is placed before the 4th quaver, where it has no justification. That obvious error was corrected both in FE2 and in EE. GE has the correct text as well. 

category imprint: Differences between sources; Source & stylistic information

issues: EE revisions , Errors in FE , FE revisions

b. 16

composition: Op. 45, Prelude in C♯ minor

..

FE1 is lacking a  before the 2nd quaver of the 2nd part of the bar. That patent inaccuracy was corrected in FE2 and EE. GE also has the correct version.

category imprint: Source & stylistic information

issues: Accidentals in different octaves , Inaccuracies in FE

b. 18

composition: Op. 45, Prelude in C♯ minor

No accidental in FE (→EE1)

G based on the notation of FE 

in GE & EE2

Our variant suggestion

..

It is difficult to decide whether we are dealing here with one authentic version or with two authentic ones. FE1 has no accidentals in this bar, and such sloppy notation (naturals are obviously needed to lower d to d) suggests that also the  lowering G to G could have been omitted. On the other hand, it i s precisely this observation that could have inspired the reviser of GE to add a  in that place, so both  and G could possibly be the only authentic version. For that reason we decide to have a variant solution. 

In versions with the natural we add a cautionary  before g in the following bar.

category imprint: Interpretations within context; Differences between sources; Editorial revisions

issues: Omission of current key accidentals

b. 18

composition: Op. 45, Prelude in C♯ minor

No accidentals (d) in FE1

 d in FE2

lowering D to D and d1 to d1 in FEJ

Three  D in GE & EE

..

FE1 does not have a single accidental in this entire bar, which means that the diminished chord d-f-a is the harmonic basis. This is how it was understood in FE2, adding a cautionary  before the 1st quaver of the L.H. Chopin's corrections in FEJ and the error-free version of GE show that Chopin's intention here was to have a D major chord as the harmonic basis. The reviser of EE added the relevant naturals here too. Cf. a further note for this bar. 

category imprint: Differences between sources

issues: Annotations in teaching copies , EE revisions , Errors in FE , Annotations in FEJ , FE revisions