Soma Penultimate was designed with inspiration and help by George Miller. Volker Latussek designed Soma Pack which is a Soma-Cube packing problem where the seven Soma pieces need to be placed into a cage through a V-shaped hole. Whereas there are three places to put that V-shaped hole, Volker used only two. So Soma Penultimate has the V-shaped hole put on the third possible place. Extensive search yielded not solutions with regular Soma pieces, not even after rotations inside the box. However, the puzzle becomes solvable by rounding off the Y-shaped Soma piece. The puzzle has a unique solution.
Edit: Volker Latussek found a solution that uses the original straight blue piece.
Watch the YouTube video.
Read at the iMaterialise Forum.
Read more at the Non-Twisty Puzzles Forum.
Please order a 3D-printed do-it-yourself puzzle kit from iMaterialise at this page (check with Oskar about screws and stickers), or contact Oskar directly if you are interested in obtaining a fully colored, stickered and assembled sample of this puzzle.
Oskar van Deventer
Oskar Puzzles offers mechanical puzzles and objects that can only exist thanks to 3D printing technologies. All designed by M.Oskar van Deventer.