Rubiks Memes

What happens when you combine two NP-complete problems and make them three-dimensional? Pure mathematical torture. This unholy hybrid of a Rubik's cube and Sudoku would keep even Fields Medal winners occupied for decades. The real challenge isn't solving it—it's explaining to your therapist why you voluntarily subjected yourself to this punishment. Mathematicians call this "recreational" the same way they call proving Fermat's Last Theorem "an interesting afternoon exercise."