As most puzzlers are well aware, Stewart Coffin has designed hundreds of mechanical puzzles of virtually every kind, many of which deliver that sublime “Aha!” brilliance that sets the very best puzzles apart. Stewart’s designs run a huge range, including 2D packing and sliding block puzzles as well as 3D interlocking and coordinate motion cubes, rhombic dodecahedra, and other shapes. The man is a puzzle genius, a superb wood craftsman, and amazingly prolific. Although he’s […]