How can I deal with two family members who are playing in the same section? For example, my brother and I both played in the same local tournament (one section) fairly frequently. Usually, we could avoid being paired (there were enough people, and the other players were willing to cut us some slack).
Occasionally, we would be leading the tournament and there was no way around pairing us. The most drastic case was when we both had perfect scores and were playing for first place (and potentially third for the loser). As a good big brother, I soundly trounced my younger brother.
Now it's not far-fetched to imagine a case where the game between family members impacted prizes/tournament standings at the end of a cash tournament. Is there a fair way to deal with the situation? Obviously any kind of collusion would be grounds for a double forfeit, but it would also be very hard to prove that it was a pre-arranged result.
An interesting side note - I seem to remember seeing that former World Champion Kosteniuk used to play in tournaments with her sister, and she said that they would be paired in round one to avoid any conflicts later. Is this a reasonable solution or is there a more equitable way to deal with things?