Bedlam cube
From Wikipedia, the free encyclopedia
The Bedlam cube is a solid dissection puzzle invented by Bruce Bedlam. The puzzle consists of thirteen polycubic pieces: twelve pentacubes and one tetracube. The objective is to assemble these pieces into a 4 x 4 x 4 cube. There are 19,186 essentially distinct ways of doing so.
Although the Bedlam cube is essentially just the logical next step up from the 3 x 3 x 3 Soma cube, it is much more difficult to solve.
