FED
compare
b. 25
Chopin wrote three digits to indicate the fingering of the trill, perhaps in order to underline the unobvious set of fingers, in which during the entire trill the 3rd finger plays c1 over the 1st finger, remaining on b.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Annotations in teaching copies, Annotations in FED
notation: Fingering