Eternity II

Christopher Monckton made puzzle news in 1999 when he released his Eternity puzzle, which was uninteresting in every way except for the million-pound prize attached to it. He confidently imagined that it would take purchasers years to solve it, only to have the solution (one of a few, probably, since he didn't design it for a unique solution) handed to him 18 months later.

He will soon be releasing Eternity II, a different puzzle with another $2 million prize. It looks like a straightforward edge-matching problem, but who knows.