Three Hexacube Construction Puzzles

Two objects are to be constructed, "keys", made from assemblies of 30 cubes. Similar to thing:3606236 each key has a bottom layer of 25 cubes arranged in a square and an upper layer of 5 cubes. Key_corner has the five cubes at the corners and center of the square array while key_diagonal has the five cubes on the diagonal of the square array. The puzzles are composed of 5 hexacubes. The first, "puzzle_corner", is a very simple one. The second, "puzzle_diagonal", is also simple. The third and final puzzle, "puzzle_both", is just a bit harder. Note that puzzle_corner only makes key_corner, puzzle_diagonal only makes key_diagonal while puzzle_both makes both key_corner and key_diagonal. Assemble_pieces.scad constructs the puzzle pieces and can be used to construct many additional puzzles. View_answers.scad shows the answers.