Set up
- Lay the phone flat between the two players.
- Red plays X. Blue plays O.
How to play
- Take turns tapping an empty square.
- Get three of your marks in a row, across, down or diagonally, to win the round.
- If the board fills up with no line, the round is a draw.
- The starting player swaps every round, so it stays fair.
- First to 3 round wins takes the match.
Tips to win
- If you go first, take the centre or a corner.
- Always block a row of two before you build your own.
- Try to make two threats at once. Your friend can only block one.