Issues : Omission of current key accidentals

b. 21-23

composition: Op. 10 No 9, Etude in F minor

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The sources are missing some of the flats before g notes (in various octaves). None of these inaccuracies raise any doubt concerning the sound intended by Chopin. In AI there are no  before g, as well as before G and g1 in bar 23. In A both flats in the L.H. in the 2nd half of bar 22 are missing; only the first of them was added in FE. The remaining sources have the correct text. 

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , Inaccuracies in FE , GE revisions , Omission of current key accidentals , Authentic corrections of FE , Inaccuracies in A

b. 21

composition: Op. 21, Concerto in F minor, Mvt II

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In A there are no naturals raising d3(2) to d3(2). Chopin's patent oversight was corrected (perhaps by himself) already in GE (→FEEE).

category imprint: Interpretations within context; Differences between sources

issues: Omission of current key accidentals , Errors of A , Authentic corrections of GE

b. 21-24

composition: WN 37, Lento con gran espressione

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None of the six necessary naturals lowering d2(1) to d2(1) are present in CJ and CK, which is a striking example of overlooked accidentals of a current key. This is even more of anomaly given that the first two R.H. naturals are written in A1. CB and EL contain the correct text.

category imprint: Interpretations within context; Differences between sources

issues: Omission of current key accidentals , Balakirev's revisions , Revisions in EL

b. 21-22

composition: Op. 28 No. 21, Prelude in B♭ major

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In these bars Chopin did not enter any accidentals into the L.H. part at all. All necessary flats were added in FC (→GE); they are also in EE. In turn, FE added accidentals only before the fifths that open the bars.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Omission of current key accidentals , Errors of A , FE revisions , Fontana's revisions , Errors repeated in FE

b. 22

composition: Op. 43, Tarantella

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In AFC3GE1 (GE2GE3)  diminishing g1 to g1 in RH was omitted. (in the corresponding bars 30 and 198 the marking is correct).

category imprint: Interpretations within context; Differences between sources

issues: Omission of current key accidentals