public static String convertIntToServerChar(int piece) {
		piece = Math.abs(piece);
		switch (piece) {
			case 1:
				return "P";
			case 2:
				return "N";
			case 3:
				return "B";
			case 4:
				return "R";
			case 5:
				return "Q";
			case 6:
				return "K";
			default:
				return "";
		}
	}