I agree with Bruno here. You essentially he's only playing against 1 player, but that will be the better player of the 2, so his score would have to be better than both of the other 2, so he has to beat 2 players while other people only has to beat 1 which I don't think is fair to Bruno.
Maybe you could have a tiebreaker question for the other 2. First person to answer correctly advances. If both are around at the time of posting of that question anyway
Well played 156mphserve! I have no regret.. 15 good answer, I am impressed.
Considering the fact, I agree with Nixer, I think that it is more interesting if you take into account the results of the two players.. because in other case, it is not a double but a single (I mean, you can win alone against 2 players)..