Attempt to solve this strange non-WCA puzzle, it is not simply a 3x3x3 without the last layer but much more complicated, a great choice if you want a new challenge or if you are curious. Top Fewest moves solvers reduce their 3x3x3 into a cube like this in a method called 'Domino Reduction', this is also what computer programs use to find the shortest solution to a given scramble.