public static Piece getPiece(int numMines) {
		switch (numMines) {
		case 0: return zero;
		case 1: return one;
		case 2: return two;
		case 3: return three;
		case 4: return four;
		case 5: return five;
		case 6: return six;
		case 7: return seven;
		case 8: return eight;
		default: return null;
		}
	}