Replaying to
https://bitcointalk.org/index.php?topic=1364041.msg13881925#msg13881925Understandable that you are going to attract people to your site first before making some money from the pot. However, the game is not truly fair. I know this is not a lottery like my site and hence it cannot use a method to select a fair winner. From what I know, the winner is the one that give the correct answer (similar by 90% to what you set) within the shortest prior of time. The loophole (to the participators) here is that there is no way to determine who give the correct answer first.