public Board() {
		_x = this.getRandomNum();
		_y = this.getRandomNum();
		_turnLocations = new ArrayList<Integer>();
		_board = new Tile[20][20];
		Tile t = new Tile('_');
		for (int i = 0; i < 20; i++) {
			for (int j = 0; j < 20; j++) {
				if (! ((i < _y && j > (19 - _x)) || (i > (19 - _y) && j < _x))) {
					_board[i][j] = null;
				
				} else {
					_board[i][j] = t;
					}
			}
		}
		
	}