Memento Pattern Code Review

class Program { static void Main(string[] args) { Int32 move;
Console.WriteLine("Let's practice TicTacToe"); Console.WriteLine("Commands are:\n1-9 for a position\nU-n where n is the number of moves to undo\nQ to end");
Game game = new Game();
Caretaker[] c = new Caretaker[10]; game.DisplayBoard(); move = 1;
Simulator simulator = new Simulator();
foreach (String command in simulator) { Console.WriteLine("\nMove {0} for {1}: {2}", move,game.Player,command);
if (command[0] == 'Q') break;
c[move] = new Caretaker(); c[move].Memento = game.Save();
if (command[0] == 'U') { Int32 back = Int32.Parse(command.Substring(2, 1)); if (move - back > 0) { game.Restore(c[move - back].Memento); } else { Console.WriteLine("Too many moves back"); } move = move - back - 1; } else { game.Play(Int32.Parse(command.Substring(0, 1))); } game.DisplayBoard(); move++; } Console.WriteLine("Thanks for laying"); Console.Read(); } }