The Rubik’s Cube has only six faces, each presenting only nine cubelets, but the end result is to offer a mind-boggling number of permutations, only one of which embodies the desired solution. The ...

When Lucas Etter's grandparents bought him a Rubik's Cube while he was visiting their retirement home, it was mainly to pass the time. Fast-forward two years, and that pastime is now an obsession.