Analysis shows 'Super Mario Brothers' is harder than NP-hard

Completing a game of "Super Mario Brothers" can be hard—very, very hard. That's the conclusion of a new paper from researchers at MIT, the University of Ottawa, and Bard College at Simon's Rock. They show that the problem of solving a level in "Super Mario Brothers" is as hard as the hardest problems in the "complexity class" PSPACE, meaning that it's even more complex than the traveling-salesman problem, or the problem of factoring large numbers, or any of the other hard problems belongin