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b. 85-93

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

..

In A the A1-A octaves in bar 85, 89 and 93 are provided with only one  each, before the top notes. 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. 86-87

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

Slur to b in A

Slur to c1 in GE (→FE,EE,IE)

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The slur in A – a "pointing" one – clearly reaches the b minim, which was not reproduced in GE (→FE,EE,IE).

category imprint: Differences between sources

issues: Inaccuracies in GE , Pointing slurs

b. 87

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

Two-part notation in A

One-part notation in GE (→FE,EE,IE)

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According to us, the short stem of the g minim does not reach the b minim, written above it, on purpose, as it is provided with a separate stem. This means that Chopin saw them as parts of two different voices. This subtlety was not reproduced in the editions.

category imprint: Graphic ambiguousness; Differences between sources

issues: Inaccuracies in GE , Inaccuracies in A

b. 87

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

in A

Accent in GE (→FE,EE,IE)

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The interpretation of the  mark as an accent – possible in a different harmonic and, particularly, structural context – is almost certainly wrong here, at the end of a four-bar section. Therefore, in the main text we reproduce the mark as a diminuendo hairpin.

category imprint: Differences between sources

issues: Long accents , Inaccuracies in GE , Scope of dynamic hairpins

b. 91

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

..

In A the g note is a semibreve, which is a patent mistake, perhaps under the influence of the notation in the previous bar. The correct rhythmic value intended by Chopin (minim) was introduced already by GE (→FE,EE,IE).

category imprint: Interpretations within context; Differences between sources

issues: GE revisions , Rhythmic errors , Errors of A