Dart tournament equation.?

Question

In a darts tournament, a player must be defeated 3 times to be eliminated. If 512 contestants eneter the tournament, what is the greatest number of games that could be played?

Answer 1

I don't think you've given us enough information.

Are dart matches one-on-one? If so, only one person is defeated in each match so it takes 3 matches to eliminate a contestant. If not, ...

Then the question becomes how many contestants have to be eliminated. If the answer is all but one, ...