Issues : Omission of current key accidentals

b. 243

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

..

In A there is no  before the 1st crotchet. The patent inadvertence was corrected in GE (→FEEE).
In FE there is no  lowering g to g on the 2nd beat of the bar. It must be a side effect of an inaccurately implemented proofreading of the part of the L.H. encompassing bars 243-244. The mistake was corrected in EE.  

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , GE revisions , Omission of current key accidentals , Errors of A

b. 243-247

composition: Op. 22, Polonaise

e1-a1 in FE (→GE) & EE2

e1-a1 in EE1

..

Just like in b. 223 and 227, the version of EE1 in b. 243 and 247 is probably Chopin's mistake adopted from a proof copy of FE. The natural raising a1 to a1 was added in both bars in the penultimate stage of proofreading of FE (→GE). The correction was also introduced in EE2.

category imprint: Differences between sources

issues: EE revisions , Omission of current key accidentals , Authentic corrections of FE , Last key signature sign

b. 244

composition: Op. 35, Sonata in B♭ minor, Mvt II

..

Overlooked naturals before the octaves in the L.H. – see bar 56.

category imprint: Interpretations within context; Differences between sources; Corrections & alterations

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

b. 244

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

..

The bar is not written correctly in any of the sources. In A four signs are missing: a  before the 5th semiquaver (d2) and flats before the 7th semiquaver (b) and before the last two semiquavers (b2 and d2). In GE (→FEEE) only two signs were added: a necessary  before the 5th semiquaver (d2) and a cautionary  before the 14th semiquaver (d3). Moreover, A repeated a  before the bottom note of the last quaver in bar 244. The unnecessary sign was removed in EE1 (→EE2) and in GE2, but it was restored in EE3.

category imprint: Interpretations within context; Differences between sources

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

b. 245

composition: Op. 35, Sonata in B♭ minor, Mvt II

Chord with c2 in GC & FE1 (→FE2EE1)

Chord with c2 in GE, FE3 (→FE4) & EE2

..

The chord with c2 is most probably a result of an oversight of the composer, which is confirmed by the  added – probably by Chopin – in FE3 (→FE4).

category imprint: Interpretations within context; Differences between sources; Corrections & alterations

issues: EE revisions , Errors in FE , GE revisions , Omission of current key accidentals , Authentic corrections of FE , Last key signature sign