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b. 262-264

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

4 accents in A & GE2

3 accents in GE1

3 accents in FE

3 accents in EE

..

In bars 252 and 264, A features clear accents on the second and penultimate quavers; such an accentuation scheme is repeated twice more in analogous bars. Therefore, omission of the 1st accent in bar 264 in GE1 (→FEEE) must be a mistake. The accents in FE are placed inaccurately, hence in EE they were put a quaver earlier, on the 1st and 7th notes of the bar, which is a mistake.

category imprint: Differences between sources

issues: Inaccuracies in FE , Errors in GE , EE inaccuracies

b. 263

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

..

FE has an erroneous e as the 2nd quaver.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , Terzverschreibung error

b. 267

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

..

In A the flats were added in this bar in a visible haste, probably to complement the notation after the notes had been written. The signs before C and c are written a third too high, whereas instead of the necessary flats before g and c2 Chopin wrote signs before e and e1. The inaccuracy was not noticed in GE1 (→FE). The necessary signs were added only in EE and GE2, whereas the superfluous flats before e and e1 were removed only in EE

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , Cautionary accidentals , Errors of A

b. 267

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

..

In FE1, the topmost note in this bar is an a1. This patent mistake was corrected in FE2, perhaps by Chopin. It is noteworthy that, in spite of the correction of the pitch, a necessary in this situation flat lowering c2 to cwas not added.

category imprint: Interpretations within context; Differences between sources

issues: Errors in FE , Terzverschreibung error , Authentic corrections of FE

b. 268

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

..

In A there is no  lowering g2 to g2. The sign was added already in GE1 (→FEEE, →GE2).

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves