private void executePromotion(Position pos) {
		@SuppressWarnings("resource")
		Scanner sc = new Scanner(System.in);
		Piece gonnaTransPiece = Board.chessBoard.get(pos);
		Color color = gonnaTransPiece.color;
		
		System.out.println("어떤 piece로 바꾸시겠습니까? 1.퀸  2.룩  3.비숍  4.나이트" );
		
		switch(sc.nextInt()){
		case 1 :
			Board.chessBoard.put(pos, new Queen(color));
			break;
		case 2 :
			Board.chessBoard.put(pos, new Rook(color));
			break;
		case 3 :
			Board.chessBoard.put(pos, new Bishop(color));
			break;
		case 4 :
			Board.chessBoard.put(pos, new Knight(color));
			break;			
		}
	Board.chessBoard.get(pos).resetMoveablePosList(pos);
	}