• Start from RUUvLDDmUvDv
• close both flaps (turning them 90 degrees)
• switch the hinging side of both flaps and open carefully (there is some stretching!) the resulting shape has a form almost identical to the cubechair. It has two superposed tiles.
• turn 90 degrees one of the two superposed tiles (as a flap).
• another tile becomes a flap and can be turned down 180 degrees. We get to the final shape (cubechair).