[previous configuration] [up to this 3D shape] [next configuration] ― Configuration code: RRmDUmRmRmDvLm

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• Start from
• Push down 90 degrees all four flaps in such a way that
  • The resulting 2x2 square is composed of four stacks of two tiles
  • The diagonals parallel to the wires on the top four tiles form the sides of a rhombus (a square rotated 45 degrees). In other words, the north-east and south-west tiles are of backslash type; the other two are of slash type.
• Position the 2x2 square in such a way that (if necessary overturn it):
  • The NW and the SE tiles on top of the corresponding stack are flaps
  • Those two flaps are hinged about a horizontal (E-W) side.
• The next move is tricky and requires a fair amount of stretching on the wires: The configuration should be opened in 3D by using the following hinging:
  • The two NW tiles are hinged about their West (vertical) side
  • The two NE tiles are hinged about their North side
  • The two SE tiles are hinged about their East side
  • The two SW tiles are hinged about their East(!) (vertical and internal to the 2x2 square) side. This makes the lower SW tile a flap
• In the opening process the tile formerly on top of the NW stack must be forced under the set of two East tiles on top of their respective stacks.