TIC TAC TOE Kata

RULES

1. The game is played on a grid that's 3 squares by 3 squares.
2. The first player to play will be ‘X’ , while the next player will be ‘O’. Players will alternate on putting their marks on the grid.
3. Players cannot play on an already played square.
4. The first player to get 3 marks in a row (either horizontally, vertically or diagonally) is the winner.
5. When all 9 squares are full, if no player has 3 marks in a row, the game ends in a tie.