The following steps assume that you have not memorized the cube. You are figuring it out based on the orientation of the numbers on the pieces. So one of the first things you need to determine is what is the difference between top corners and bottom corners. And what sets apart the middle edges? And very importantly, which number goes in the center on top. Things like that. OK, let’s go.
- Get the bottom corners bottom side down on the bottom. This corresponds to getting the white X in the Adam Cheyer Corners First Method.
- Get the top corners top side up on the top. This corresponds to getting the yellow X in the Corners First Method.
- Get all the top corners in the correct places relative to each other and the bottom corners in the correct corners relative to each other. This corresponds to getting all the X’s in the Corners First Method.
- Orient the top and bottom centers.
- Get the bottom and top edges that go in the left and right faces. There is only one piece that can go in each of these locations due to the orientation of the numbers on the pieces. Steps 5 and 6 correspond to getting 3 top and 3 bottom edges in the Corners First Method.
- Get the bottom and top edges that go in the back face. This is the first time you need to pay attention to the 1 through 9 on each side rule. Put them in so they are consistent with the pieces already in place.
- Get the last two top and bottom edges. Make sure the numbers are consistent with the pieces that have already been put in place. This corresponds to getting the last two top and bottom edges in the Corners First Method.
- Get the top and bottom layers consistent with each other Sudoku-wise. Get the middle layer centers, making sure the centers are consistent with the numbers around the sides on both top and bottom.
- 3-cycle the middle layer edges into place. Use the up-replace-down 3-cycle. The Corners First Method 3-cycle can be used, but then you may have to flip edges. Flip edges if necessary.
- Get the middle layer centers oriented correctly.
I had solved the Sudoku Cube several times by other methods before watching Robert use the Corners First Method on it. I am convinced that this is the best method to use.