Update notes

notes.md

@@ -1,13 +1,35 @@
-# Reading the code in Tic Tac Toe
+# 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
+### Checking to see whether the game is over
 
-## Determining which actions are available at a particular state
+### Determining which actions are available at a particular state
 
-## Showing the board
+### Showing the board
+
+### Choosing which action to play on a turn
+
+
+## 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       |   |         |   |   
+
+### Initial game state
+
+You can get the inital game state using game.get_initial_state(). 
+What is the current and future reward for this state? What does this mean? 
 
-## Choosing which action to play on a turn