4X4 Rubik's Cube

The Rubik’s cube is probably the 2nd easiest puzzle in the world following the Rubik’s Pocket Cube, which is just the corner solution algorithm. Actually, Pyraminx and a couple of others that were popular around the time of Rubix Cube are much, much easier than even the Pocket Cube. Once you have mastered the art of the Rubik’s Cube, others become much easier for you such as the 4X4 Rubik’s Cube.

Finally I had a breakthrough on 4X4 Rubik’s Cube, which I never actually figured out how to solve on my own until I discovered a website which aided me in completing it. My basic strategy is to match up all the centers and edge pieces, and then solve it as if it were a regular 3x3x3 rubik’s cube. What's very aggravating about the 4X4 Rubik’s Cube is that using this strategy it is possible to get down to the very end and discover a situation that is simply impossible.  The former requires going back almost to the beginning of edge-piece matching and the latter requires going back to about the middle of the 3x3x3 solution, and you can't tell which you need to do (or both!) until you are almost done with the last layer.

There are probably more efficient ways to solve the 4X4 Rubik’s Cube, in fact, I have a solution book for it that is much shorter - but frankly I prefer a solution I can understand to one I must memorize.