Made the computer player smart. Only cats games.

What I changed
Updated the LookaheadStrategy for the computer player

Why I changed it
In this case, we weren't asked to develop the strategy (thankfully!)
but instead just tasked with pointing the computer player class to
using that strategy instead of making a random choice.

Estimate for remaining time to finish assignment: [Time for Nim?]

notes.md

@@ -30,15 +30,23 @@ available actions generated
 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 |   
+   | O | O       |   | O     x | X |       X | O |   
 ---+---+---   ---+---+---   ---+---+---   ---+---+---
- X | X |         | X |       X | O | O       |   |   
+ X | X | x       | X | x     X | O | O       | x |   
 ---+---+---   ---+---+---   ---+---+---   ---+---+---
-   |   |         |   | O       |   |         |   |   
+   |   |         |   | O       |   |         |   |    
+
+For #1, choosing 6 wins the game. For #2, choosing 6 blocks O from winning.
+For #3, choosing 0 gives a win on the next turn regardless of where O blocks.
+For #4, choosing 4 means O has to block, then if X chooses 6 on the next turn,
+there is a guaranteed win in 2 or 3 regardless of where O blocks.
 
 ### 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? 
 
+The current and future reward for this state is 0 which tells me there are as many
+games where x wins as loses and most games end in a draw? Does this mean it's a
+fair game?
 

play_ttt.py

@@ -3,7 +3,7 @@ from ttt.view import TTTView
 from ttt.player import TTTHumanPlayer, TTTComputerPlayer
 
 player0 = TTTHumanPlayer("Player 1")
-player1 = TTTHumanPlayer("Player 2")
+player1 = TTTComputerPlayer("Robot")
 game = TTTGame()
 view = TTTView(player0, player1)
 

ttt/game.py

@@ -67,9 +67,9 @@ class TTTGame:
         for i in range(3):
             if currentState[i] == symbol and currentState[i+3] == symbol and currentState[i+6] == symbol:
                 return True
-        if currentState[0] == symbol and currentState[4] == symbol and currentState[8] == symbol:
+        if currentState[4] == symbol and currentState[0] == symbol and currentState[8] == symbol:
             return True
-        if currentState[2] == symbol and currentState[4] == symbol and currentState[6] == symbol:
+        if currentState[4] == symbol and currentState[2] == symbol and currentState[6] == symbol:
             return True
         
         return False

ttt/player.py

@@ -1,5 +1,5 @@
 from click import Choice, prompt
-from strategy.random_strategy import RandomStrategy
+from strategy.lookahead_strategy import LookaheadStrategy
 from ttt.game import TTTGame
 import random
 
@@ -24,7 +24,7 @@ class TTTComputerPlayer:
     def __init__(self, name):
         "Sets up the player."
         self.name = name
-        self.strategy = RandomStrategy(TTTGame())
+        self.strategy = LookaheadStrategy(TTTGame(), deterministic=False)
 
     def choose_action(self, state):
         "Chooses a random move from the moves available."