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b. 261-262

composition: (Op. 4), Sonata in C minor, Mvt IV

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In the L.H. part EE1 overlooked both flats to d2 in these bars. The mistakes were corrected in EE2.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in EE

b. 262-263

composition: (Op. 4), Sonata in C minor, Mvt IV

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In the main text we omit the unnecessarily repeated  to d3 at the end of bar 262; the accidental was also omitted in GE (→FE,EE,IE). On the other hand, we add a cautionary  to a2 at the beginning of bar 263.

category imprint: Differences between sources; Editorial revisions

issues: GE revisions , Cautionary accidentals

b. 263

composition: (Op. 4), Sonata in C minor, Mvt IV

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The  restoring b2 in the 2nd half of the bar, omitted in A, was added in GE (→FE,EE,IE).

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration , GE revisions , Errors of A

b. 265-269

composition: (Op. 4), Sonata in C minor, Mvt IV

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In A there is not a single  to the bottom note of the octaves (D) in these bars (as well as in the next ones, until bar 274). The patent inaccuracy was corrected in GE (→FE,EE,IE).

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , GE revisions , Inaccuracies in A

b. 265

composition: (Op. 4), Sonata in C minor, Mvt IV

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In A Chopin did not restore the bass clef in this place, which renders the notation illogical until the end of the line in bar 270 (at the beginning of a new line, there is a bass clef). The mistake was corrected in GE (→FE,EE,IE).

category imprint: Interpretations within context; Differences between sources

issues: GE revisions , Errors of A