Oak floor underneath

Q: I have recently moved into a house which has 1930’s vinyl flooring throughout the ground floor. I had pulled this up and found underneath some sort of board- hammered down with hundreds of nails. I have managed to pry some of this board up with a crows for and a mallet but it is very hard work. Is there an easier way?

Underneath is a lovely old oak floor which just needs sanding and finishing. Any suggestions would be much appreciated.

A: I will give you the best suggestion I can give anyone for this job. Hire a professional. This work really is beyond the scope of most home owners.