EEW
compare
-c1-f1 triad in 
The triad in the original version in As, identical to the version of the analogous bar 10, was replaced by a sixth in the published version. Chopin seems to have strived to concentrate expression, i.a. through stricter control of the voices – cf. e.g. bar 25.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources; Corrections & alterations; Source & stylistic information
issues: Accompaniment changes
notation: Pitch