At this point, we’ve finished the player logic and the board logic. I would say that the hard part is pretty much over. All we have to do now is get the actual game logic down. So normally, in a game of tic tac toe, each player would take turns deciding on a place to put their mark. To start, whenever a game starts, let’s have it so that two players are made, the “X” player and the “O’ player and a new instance of the board is created. Also, lets try to determine what a turn is and we can make a method out of that. Finally, let’s start a play method which would loop through every command that the game has to go through.

class Game
  def initialize
    @player_one ="X")
    @player_two ="O")
    @board =

  def play

  def turn(player)
    input = player.get_input(
    @board.place_input(input, player)

Don’t forget about our get_input method from the Player class and the place_input method from the Board class.

So this should be executable at this rate. Each time we run the file game.rb the game will start with 2 players and a tic tac toe board. After that starts, each player can take turns filling in the board! AWESOME. However, we are far from done. How will the game know when to stop? What if we give an input that we actually shouldn’t be able to? Let’s tackle these problems one by one.