Issues : Annotations in FED

b. 9-13

composition: Op. 25 No 9, Etude in G♭ major

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In GC (→GE1), FE and EE there are no naturals raising c to c in bars 9 and 13 and c1 to c1 in bar 12. These are Chopin's obvious oversights, while the signs were added in FED (in bar 9) and FEJ and FES (all).
GE1 also omitted the  raising c1 to c1 in bar 10. GE2 (→GE3) features the correct text. 

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , Errors in FE , Annotations in FED , Errors in EE , Errors in GE , GE revisions , Omission of current key accidentals , Annotations in FES , Annotations in FEJ

b. 9-11

composition: Op. 64 No 1, Waltz in D♭ major

Fingering written into FED

No teaching fingering

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We give the fingering written in pencil in FED, coming probably from Chopin. The first two digits are repeated also in bars 17-18.

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FED

b. 9

composition: Op. 28 No. 23, Prelude in F major

Fingering written into FED

No teaching fingering

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In the main text, we include the written into FED fingering which have come from Chopin.

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FED

b. 9

composition: Op. 28 No. 15, Prelude in D♭ major

Fingering written into FED & FES

No teaching fingering

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In the main text we give identical indications entered into FED and FES – a mark indicating that f1 should be performed by the R.H. and two fingering digits concerning the L.H.

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FED , Annotations in FES

b. 9

composition: Op. 28 No. 13, Prelude in F♯ major

Synchronization mark in FED

No mark in remaining sources

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The line indicating that the a grace note should be performed together with the 1st L.H. quaver, F, was added – probably by Chopin – in FED

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FED , Synchronization markings