{{explanation}}
2 chords - 2nd chord 2s cross to opp side

1-8
: 1s+2s dance Petronella in Tandem, set; repeat, 2s remain on sides, 1s
  advancing to end BtoB between 2s
9-16
: 1s+2s dance reel of 4 across, 1s pass RSh to end 1L followed by 1M
  facing 2M
17-32
: 1s dance 1/2 diagonal Alternating Tandem reels of 3, RSh to 2M (1st
  corner diagonal); RSh to 3M (2nd corner diagonal): RSh to 2M (1st
  corner diagonal); RSh to 3M (2nd corner diagonal). 1s end in 2nd place
  opp sides. 2 (1) 3)
33-40
: 1s+3s dance Petronella in Tandem, set; repeat, 3s remain on sides, 1s
  advancing to end BtoB between 3s
41-48
: 1s+3s dance reel of 4 across, 1s pass RSh to end in 3rd place own side.
   2 (3) 1