In his thesis, Chung points out that there is a very high frequency of set-class 3-3, always consisting of a minor second and a minor third (up or down) third, for example in line 5, the grace-note sequence, top voice, there are three groups of set-class 3-3: D-Db-F; Db-F-E; F#-D-D# (2). This three-note group seems to be a structuring element regularly recurring in the whole movement.
Something to point out (3) is the exact retrograde in pitches between the passage starting in the second half of line 1 (E-C-G#-etc.) and the triplet section in line 4. Another re-exposition of the opening of this movement is the transposed version starting at the upbeat of line 6, and the transposed version of the opening at the end of the movement, last line.Chung makes different subdivisions for metric stability, worth discussing with our solutions. He also subdivides the phrase of the second line of this movement differently than our subdivisions.