Suggests a move for you.
When you choose Hint, a cross appears over the square the computer would choose if it were its turn to play. You can accept the suggestion or move elsewhere.
Skips your turn, giving the move to the computer.
You can choose Pass on your first move to force the computer to make the first play. After that, you can only choose Pass when you cannot make a legal move.
Starts a new game.
You can start a new game at any time, even before you finish a game.