3X3 BEGINNER TUTORIAL

In this step, we will move the four corner pieces with white stickers down to their proper place in the bottom layer. There is a short algorithm that helps us do this: (RUR') and its mirror (L'U'L).

Identify a corner in the top layer with a white sticker, preferably one with the white sticker on the side rather than on the very top of the cube.

Corner on Top, White Sticker on Side

If the white sticker is on the side, turn the top to align the other side color with its center (e.g. red with red), then face that side color.

If the white corner is on the right side of the cube, use (RUR').
If the white corner is on the left side of the cube, use (L'U'L).

Corner on Top, White Sticker on Top

If the white sticker is on the very top of the cube, turn the top until the white corner is over an empty slot (that is, over a bottom-layer corner that is not yet solved).

If the white corner is on the right side of the cube, use (RU2R'). Now the white sticker should be on the side in the top layer, so you can follow the instructions above.
If the white corner is on the left side of the cube, use (L'U2L). Now the white sticker should be on the side in the top layer, so you can follow the instructions above.

Corner on Bottom

Sometimes there will be no white corners in the top layer, but the bottom layer is not solved. When this happens, turn the cube so that an incorrect white corner is on the bottom front, preferably with the white sticker facing sideways. (This avoids creating a top-facing white sticker.) If the incorrect white sticker is facing down, then it doesn’t matter if it is on the bottom front left or bottom front right.

If the white corner is on the right side of the cube, use (RUR'). Now the white sticker should be on the side in the top layer, so you can follow the instructions above.
If the white corner is on the left side of the cube, use (L'U'L). Now the white sticker should be on the side in the top layer, so you can follow the instructions above.

After all corners are placed correctly around the white cross, the first layer will be complete. Next we will solve the second layer.