As tough as Rubik’s Cubes might be to solve for you, it turns out that all you need to solve a 4×4 cube is some LEGO Mindstorms parts, a mass-market LEGO programmable robotics kit, and a Nokia smartphone from three years ago.
The execution is the tricky part:
One patient YouTube commenter counted a solution of just 109 moves in 15 minutes. Remarkable.
Microprocessor company ARM, which posted the video, has a channel well-stocked with other neat robotics videos, so be sure to check them out.