While playing in 2D or tutorial mode, press C-Left or C-Right to change the board.

At any time during the game, press C-Up, C-Down, Up, Down, Left, and Right. When your opponent makes a move, you'll see a row of scrolling numbers at the bottom of the screen telling you where it's going to move next.

At any time during the game press: C-up, C-down, C-left, C-right, UP, DOWN, LEFT, and RIGHT on the D-pad