Computer Player

    /// This class represents a "comuter" player.  
    /// It determines moves using minmax decision rules
    /// </summary>
    public class ComputerPlayer : Player
    {
        public const int DEFAULT_SEARCH_DEPTH = 3;

        /// <summary>
        /// Constructs a new computer player.  The DEFAULT_SEARCH_DEPTH is used
        /// </summary>
        /// <param name="name">The name of the player</param>
        /// <param name="p">The piece this player is using in the came</param>
        public ComputerPlayer(string name, Board.Pieces p) : this(name,
            p, DEFAULT_SEARCH_DEPTH)
        {
        }

        /// <summary>
        /// Constructs a new computer player
        /// </summary>
        /// <param name="name">The name of the player</param>
        /// <param name="p">The piece the player is using</param>
        /// <param name="searchDepth">The depth to search for moves in the game tree.</param>
        public ComputerPlayer(string name, Board.Pieces p, int searchDepth) :base(name, p)
        {
            this.SearchDepth = searchDepth;
        }

        /// <summary>
        /// gets or sets the search depth which is the number of moves
        /// the computer player will look ahead to determine it's move
        /// Greater values yield better computer play
        /// </summary>
        public int SearchDepth { get; set; }

        /// <summary>
        /// Start the computer searching for a move
        /// Clients should listen to the OnPlayerMoved event to be notified 
        /// when the computer has found a move
        /// </summary>
        /// <param name="gameBoard">The current game board</param>
        public override void Move(object gameBoard)
        {
            Board b = (Board)gameBoard;

            Node root = new MaxNode(b, null, null);
            root.MyPiece = this.PlayerPiece;
            root.Evaluator = new EvaluationFunction();
            root.FindBestMove(DEFAULT_SEARCH_DEPTH);

            currentMove = root.BestMove;

            OnPlayerMoved();
        }

          ...
    }