b. 40
The fingering of FE (→GE) is certainly authentic, as Chopin added it while proofreading FE. The same fingering, completed in the lowest octave by Fontana, is given in EE. However, in FED there is another one written next to the non-removed printed fingering, which is undoubtedly supposed to replace it. The second fingering allows for omitting a wider position between the 3rd and 4th fingers, which could be problematic. In the main text we include both authentic fingerings.
Compare the passage in the sources»
category imprint: Differences between sources
issues: Annotations in teaching copies, EE revisions, Annotations in FED, Authentic corrections of FE
notation: Fingering