they say success is the best revenge:
just think how remorseful she's going to be when she finds out that you're well-adjusted enough to not only run the chess tournaments now, but even accomodate her dorky husband on his quest to get thrashed by your obscenely unfair pairings;
i'm sure they'll have a productive adult discussion about the viability of his hobby when he comes moping back home 12 hours later to all the undone house chores... humiliated, livid & $200 poorer.
Well.... #4 just crossed the line. Went too far. Ban that mofo and his wife!