Tomas Rokicki has written up a proof that any Rubik’s Cube configuration can be solved in 25 or fewer moves. In his paper, Twenty-Five Moves Suffice for Rubik’s Cube, Rokicki proves that there are no configurations that can be solved in exactly 26 moves. Taken with earlier results, this means that 25 movies should suffice for any solution. “How many moves does it take to solve Rubik’s C ... Continue reading