You can try to find combinations that only permutate parts of the whole thing, with the rest staying as before. Let me give an example if the last row of a 3x3

You can try to find combinations that only permutate parts of the whole thing, with the rest staying as before. Let me give an example if the last row of a 3x3 is already correct. MU - UL - MD Middle Up: you break the correct row temporarily with this. Up Left: you do something with the other tiles Middle Down: re-correct last row