{{explanation}}
2 chords - 2nd chord 4s & 5s & 6s cross to opp sides

1-8
: 1s+2s+3s also 6s+5s+4s dance RSh reels of 3 on sides:

: To start:1M dances across to pass 2L RSh, 1L crosses down, passing 2M
  RSh

: At end: 1M crosses up from 2nd place opp side, pull back RSh to face
  in, 1L dances across from 1st place opp side to original place facing
  out

: 6s dance similarly with 5s+4s.  3L+4L finish facing out
9-12
: 1s+2s also 3s+4s also 5s+6s dance RH across
13-16
: 1s & 6s cast in 1 place & 1/2 turn partner LH into prom
  hold, **while** 2s & 5s dance to ends & set, **while** 3s+4s dance LH
  across
17-24
: 1s set to 3L & 6s set to 4L, 1s set to 6s, 1s set to 3M & 6s set
  to 4M, 1s set to 6s & face partner **while** 3s & 4s set to partners &
  face up/down
25-32
: 1s+3s+4s+6s dance 6 changes of Grand Chain (1 bar per hand), 1s & 6s
  full turn RH **while** 3s & 4s cross RH.  2 3 6(1)(4)(5)