Nosanninwa you should have like 8 hour intervals between your 3 riddles. Let everyone make their guess between the 8 hours. and after the 8 hours are up, tell who got the right answer and go on with the next riddle. during this time don't tell who got it right or wrong.
so it'll be sorta like a lottery. Everyone chooses 1 and only 1 thread and waits until the results are in. That'll probably be the most fair.
as for me i'll choose how can you not like sasuke thread.
whores, kings, pawns heck everything is in there.
http://forums.animesuki.com/showthread.php?t=1838