64 players are 6 rounds of play
32 for 5 rounds
16 for 4 rounds
the bad thing is, if ya go with 6 rounds of play & you get 2 sitouts v each other, depending on the blind structure and starting chip stacks,
that first round can last hours by itself.....
then, with players waiting in the wings, patience is tried ! some of them end up leaving which could lead to another sitout v sitout,
it wouldn't be real surprising to see a 6 round tourney, take 10 hours to complete the first 5 rounds.
the cereus network of course, boots the sitouts after the first round,
so I'd think that would be the only place to successfully attempt a HU freeroll,
anywhere else, would be futile