Hi Shapeways fans, Soma Burr is an interlocking Burr puzzle, made of Soma Cube pieces glued to surrounding castellated squares. When the puzzle is together, then only one move is possible, namely sliding out the red piece. This unlocks further pieces, and the puzzle can be taken apart. The object is to put the puzzle together again. This is challenging, because not all assemblies that fit together can actually be put together. Watch the YouTube video. Buy the puzzle at my Shapeways Shop. Read more at the Non-Twisty Puzzles Forum. Check out the photos below. Enjoy! Oskar