[up to this 3D shape]
- Start from
- Close as shown in this sketch
- Position the resulting 2x1 flat rectangle such that the North stack
contains five tiles with the one on top of type backslash
- Three top tiles (two from the North stack and one from the South stack) can be turned 180 degrees
towards East to form a 2x2 square
- Now a pair of tiles on top can be turned South 90 degrees
- Similarly two tiles on bottom of the stacks can be turned 90 degrees in the final shape
This is hinge equivalent to a "planar face-up" configuration
of the paper [arxiv:1401.3699],
precisely the one displayed in figure 17b.
