http://www.funtrivia.com/knockout/subscribe.cfm
This is a weekly Trivia Tournament that starts on Tuesdays and runs through Saturdays. You face 15 other contestants in rather evenly matched bouts until there is a contest on Fridays of the remaining two contestants.
Accuracy and speed of answers count.
And the competition gets more and more difficult as you work your way up the leaderboard competing with better and better players.