The differing dynamic markings appearing in identical motifs – 
in bar 156 and a long accent in bar 157 – suggest that the notation is inaccurate. It is supported by a comparison with analogous or identical bars 152-153 and 164-165, which contain accents. However, taking into account frequent misunderstandings in the reproduction of long accents, we consider it to be likely that it was long accents that Chopin meant in both bars.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: Long accents, EE inaccuracies
notation: Articulation, Accents, Hairpins