If there's a tie in a single game it means that both players worth the maximum score.(posted 9545 days ago)If there's a tie in the leaderboard, the idea of a "one-on-one" sub- contest (who beats the other in any game) is fine, but I'm afraid it will result in another tie easily enough (if you want your statistician to calculate the exact probability of this event, he will do !!!! ;-)))
Therefore I think the best way to solve a tie will be to compare the max #1, and eventually the max #2, and even the max #3, if needed !!!
Cicca