private ChessmenData getChessmen(final int fixX, final int fixY) {
		for (Integer id : chessmens.keySet()) {
			ChessmenData chessmen = chessmens.get(id);
			if (chessmen.getFixX() == fixX && chessmen.getFixY() == fixY) {
				return chessmen;
			}
		}
		return null;
	}