static final long serialVersionUID = 1L;

	static final int game_const = 500;

	protected boolean SIMU_DEBUG = false;

	private boolean negate_estimation = false;

	private Move bestMove;

	private int desired_depth;

	public KIBoard(int w, int h) {

		super(w, h);

		desired_depth = -1;

	}

	/**

	 * Set the current DEBUG-Level: simu: print all valid, simulated moves undo:

	 * print all undos

	 */

	public void setDebug(boolean simu, boolean undo) {

		SIMU_DEBUG = simu;

		UNDO_DEBUG = undo;

	}

	public boolean simu_debug() {

		return SIMU_DEBUG;

	}

	public boolean undo_debug() {

		return UNDO_DEBUG;

	}

	/**

	 * This function flips the sides: Player A maximizes and Player B minimizes

	 */

	public void negateEstimation(boolean b) {

		negate_estimation = b;

	}

	/**

	 * The Minimax-Algorithm works for TWO-PLAYER Games Player A minimizes,

	 * Player B maximizes

	 */

	public int estimateFunction() {

		int i;

		int white = 0;

		int black = 0;

		for (i = 0; i < 64; i++) {

			if (isWhite(i))

				white += getValue(i);

			else if (isBlack(i))

				black += getValue(i);

		}

		// Bewerte Entwicklung, Anzahl der Steine

		// Das hier ist alles zu lahm...

		white += controls("white");

		black += controls("black");

		/**

		 * solves ticket #3

		 */

		if (negate_estimation)

			return white - black;

		return black - white;

	}

	/**

	 * simulates and returns the next possible move for a Player or null, when

	 * no more moves are possible. The Turn will flip automatically if

	 * "simulate(...)" finds a valid move.

	 */

	Move simulate(int t, int o) {

		Move move;

		int value;

		if (validTurn(o)) {

			while (t < 64) {

				if (!simulateMove(t, o)) {

					t++;

					continue;

				}

				value = estimateFunction();

				if (SIMU_DEBUG)

					print("SIMU", t, o, value);

				move = new Move(value, t, o);

				/* Flip Sides */

				setBlacksTurn(!isBlacksTurn());

				return move;

			}

		}

		return null;

	}

	/**

	 * AlphaBeta-Algorithm: the Maximizer

	 */

	int max_alpha_beta(int depth, int alpha, int beta) {

		int moveValue;

		int o, t;

		Move move;

		if (desired_depth == -1)

			desired_depth = depth;

		for (o = 0; o < 64; o++) {

			t = 0;

			while ((move = simulate(t, o)) != null) {

				/* particular move from black */

				t = move.target;

				if (depth == 0 || Math.abs(move.value) > game_const)

					moveValue = move.value;

				else

					/* best next move */

					moveValue = min_alpha_beta(depth - 1, alpha, beta);

				undo();

				t++;

				if (moveValue >= beta)

					return beta;

				if (moveValue > alpha) {

					alpha = moveValue;

					if (depth == desired_depth)

						bestMove = move;

				}

			}

		}

		return alpha;

	}

	/**

	 * AlphaBeta-Algorithm: the Minimizer

	 */

	int min_alpha_beta(int depth, int alpha, int beta) {

		int moveValue;

		int o, t;

		Move move;

		for (o = 0; o < 64; o++) {

			t = 0;

			while ((move = simulate(t, o)) != null) {

				/* particular move from white */

				t = move.target;

				if (depth == 0 || Math.abs(move.value) > game_const)

					moveValue = move.value;

				else

					/* best next move */

					moveValue = max_alpha_beta(depth - 1, alpha, beta);

				undo();

				t++;

				if (moveValue <= alpha)

					return alpha;

				if (moveValue < beta)

					beta = moveValue;

			}

		}

		return beta;

	}

	/**

	 * Evaluates the next, best Move after search_depth half-moves. When the

	 * Machine has Black, set negateEstimation(false); When the Machine has

	 * White, set negateEstimation(true);

	 */

	public boolean doBestMove(int search_depth) {

		int value;

		desired_depth = -1;

		bestMove = null;

		value = max_alpha_beta(search_depth, Integer.MIN_VALUE, Integer.MAX_VALUE);

		if (bestMove == null) {

			System.err.println("Computing once more...");

			value = max_alpha_beta(--search_depth, Integer.MIN_VALUE, Integer.MAX_VALUE);

			if (bestMove == null) {

				System.out.println("Check Mate " + value);

				return false;

			}

		}

		if (doMove(bestMove.target, bestMove.origin)) {

			print(getColor(bestMove.target), bestMove.target, bestMove.origin, bestMove.value);

			return true;

		}

		print("Check Mate", bestMove.target, bestMove.origin, bestMove.value);

		return false;

	}