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― Configuration code: RRmUmDmRvDvUmU
- Start from
- Rotate 180 degrees with a valley fold the two West adjacent tiles
(the two extremal tiles in the flat 2x2 square)
- Lower the upright flap 90 degrees against the other flap
- Rotate 90 degrees the two adjacent tiles pointing down, one of them will
stack against the two stacked flaps
- End up with a 2x2 square with two stacks of two tiles in the West positions,
a stack of three tiles in the North-East position and a single tile in the South_East
position
- Open in 3D with the following hingings
- Keep the two tiles in the NW stack together
- Hinge the SW stack about the West side
- Hinge the two top tiles in the NE stack about the North side
- Hinge the two bottom tiles in the NE stack about the West side
- The resulting structure is contained in a 1x1x2 box and comprise a pair of stacked tiles
- Rotate 90 degrees a group of three mutually orthogonal tiles
- Rotate 90 degrees a newly created flap into the final shape