diff --git a/Board.cpp b/Board.cpp
index 0571348..0cd08d1 100755
--- a/Board.cpp
+++ b/Board.cpp
@@ -479,6 +479,67 @@ void Board::displayPossibleMoves(vector<moves> input)
 		cout<<"possible move: "<<input[i].row<<" "<<input[i].column<<" "<<input[i].moveType<<endl;
 	}
 }
+
+void Board::undo(Board& tablero)
+{
+	vector<Board> record;
+	
+	if (record.size() < 2)
+	{
+		cout<<"nothing to undo"<<endl;
+	}
+	
+	else
+	{
+		for (int r = 0; r < 8; ++r)
+		{
+			for (int k = 0; k < 8; ++k)
+			{
+				tablero.modifyAt(r,k,(record[record.size()-2]).elementAt(r,k));
+			}
+		}	
+		record.pop_back();
+	}	
+}
+
+void Board::interpret(string input, Board& tablero)	//determines what kind of command its input is
+{
+	input = myToUpper(input);
+	
+	if (input == "UNDO")
+	{
+		undo(tablero);
+	}
+	
+	else if (input == "DISPLAYRECORD")	//for debugging purposes
+	{
+		cout<<"record: "<<endl;
+		cout<<record.size();
+		for (int i = 0; i < record.size(); ++i)
+		{
+			record[i].displayBoard();
+		}
+		cout<<"---------------------------------------------------END DISPLAY RECORD------------------------"<<endl;
+	}
+	
+	else tablero.move(input);
+}
+
+void Board::snapshot(vector<Board>& inputVec, Board inputBoard)
+{
+	if (inputVec.size() == 10)
+	{
+		inputVec.erase(inputVec.begin());
+	}
+	
+	else if (inputVec.size() > 10)
+	{
+		cout<<"QUEUE OVERFLOW!"<<endl;
+	}
+	
+	
+	inputVec.push_back(inputBoard);
+}
 	
 void Board::easyAI()
 {
diff --git a/Board.h b/Board.h
index b9d8b6d..921455b 100755
--- a/Board.h
+++ b/Board.h
@@ -36,5 +36,8 @@ public:
 	vector<moves> viewPossibleMoves();
 	string myToUpper(string input);
 	void displayPossibleMoves(vector<moves> input);
+	void undo(Board& tablero);
+	void interpret(string input, Board& tablero);
+	void snapshot(vector<Board>& inputVec, Board inputBoard);
 	void easyAI();
 };
\ No newline at end of file
diff --git a/main.cpp b/main.cpp
index 6e8a8e0..37212b1 100644
--- a/main.cpp
+++ b/main.cpp
@@ -2,15 +2,26 @@
 #include <vector>
 #include <stdlib.h>
 #include <stdio.h>
-#include "GameEngine.h"
+#include "Board.h"
 
 using namespace std;
 
 int main()
 {
 
+	cout<<"\n----------------------------"<<endl;
 	cout<<"Welcome to Breakthrough\n"<<endl;
-	cout<<"playing with AI..."<<endl;
+	cout<<"-----------------------------\n\n"<<endl;
+	
+	cout<<"1. Play agains AI?"<<endl;
+	cout<<"2. Play against a human?"<<endl;
+	cout<<"Enter choice: "<<endl;
+	
+	int choice;
+	cin>>choice;
+	
+	if (choice == 1) cout<<"playing with AI..."<<endl;
+	else cout<<"playing with human..."<<endl;
 	
 	Board b;
 	
@@ -18,26 +29,53 @@ int main()
 	
 	bool gameOver = false; 
 	
+	snapshot(record,b);
+	
 	while (gameOver != true)
 	{
 		gameOver = b.isGameOver();
 		
-		while(b.getTurn() == 'O')
+		while(b.getTurn() == 'O' )
 		{
 			b.displayBoard();
-			cout<<"\nEnter move: ";
+			cout<<"\nEnter command: ";
 			cin>>move;
-			b.move(move);
+			interpret(move,b);
 		}	
 		
 		
 		vector<moves> possibleMoves = b.viewPossibleMoves();
 		//displayPossibleMoves(possibleMoves);	for debugging purposes - AI
 		
+		if (choice == 1)
+		{
+			b.easyAI();
+		}
+
+		else
+		{
+			while(b.getTurn() == 'X' )
+			{
+				b.displayBoard();
+				cout<<"\nEnter command: ";
+				cin>>move;
+				interpret(move,b);
+			}	
+		}
 		
-		b.easyAI();
-		
+		//b.snapshot();
 		gameOver = b.isGameOver();
+		
+		snapshot(record,b);
 	}
 	
+	//for debugging purposes
+	cout<<"Record:"<<endl;
+	
+	
+	cout<<record.size();
+	for (int i = 0; i < record.size(); ++i)
+	{
+		record[i].displayBoard();
+	}
 }