FE1
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As was the case with staccato dots – see the previous note – the three-note slurs in the 2nd half of bar 377 are probably an attempt at finding the best way to mark articulation of the final passage of the Variations. Eventually, Chopin opted here for shorter slurs, but in a similar context in the finale of the Concerto in F minor, Op. 21, bars 506-510, he wrote slurs encompassing 3 notes.
Compare the passage in the sources »
category imprint: Differences between sources; Corrections & alterations
notation: Slurs