public SudokuBoard read() throws MySQLException, WrongValueException, WrongIndexException {
        try {
            Connection connection = DriverManager.getConnection("jdbc:derby:SudokuDB;create=false;user=test;password=test:");
            Statement stm = connection.createStatement();
            ResultSet r = stm.executeQuery("select max(board) as m from fields");
            int board;
            if (r.next()) {
                board = r.getInt("m");
            } else {
                board = 0;
            }
            r = stm.executeQuery("select posx as x, poxy as y value as v from fields where board=" + Integer.toString(board));

            SudokuBoard brd = new SudokuBoard();
            while (r.next()) {
                int iks = r.getInt("x");
                int igrek = r.getInt("y");
                int val = r.getInt("v");
                brd.set(iks, igrek, val);
            }
            connection.close();
            return brd;
        } catch (SQLException e) {
            throw new MySQLException("Problem with Database");
        }
    }