# Tic Tac Toe notes


## Checkpoint 1 Notes

Which class is responsible for each of the following behaviors?
For each, explain how the behavior is accomplished.

### Checking to see whether the game is over

   The game inspects the board for winning patterns
   (three identical non-empty marks in any row, column, or diagonal).
   It also checks whether there are any empty squares left — if there
   are none and there is no winner the result is a draw.

### Determining which actions are available at a particular state

   The function scans the board representation and returns the indices or coordinate pairs for empty cells.
   If the state is terminal it returns an empty list.

### Showing the board

   The view module provides formatting and printing utilities that convert the internal state into a nice 3x3 grid

### Choosing which action to play on a turn

   Scans the board for who went last; giving the next placement opportunity to the person who went before the move that was just played 
## Checkpoint 2 Notes

### TTT Strategy

For each of the following board states, if you are playing as X
and it's your turn, which action would you take? Why?

   | O | O       |   | O       | X |       X | O |   
---+---+---   ---+---+---   ---+---+---   ---+---+---
 X | X |         | X |       X | O | O       |   |   
---+---+---   ---+---+---   ---+---+---   ---+---+---
   |   |         |   | O       |   |         |   |   

1) Place X at the middle right to win

2) Place the X in the middle right again to block my opponent from winning

3) Place X at the top left of the board to gain an opportunity to win on the next turn

4) Place X in the middle for possible opportunities in the future and to block the opponents O in the top middle from being of any use.

### Initial game state

You can get the initial game state using `game.get_initial_state()`.
Current reward is 0 so neither player has an advantage at the start.