GreenEGO
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I can suggest the following: "Either a duel is held, or there will be a minor violation of the Swiss system - both players are disqualified."
Hmm... well, I suppose I agree with Winner on this one. Disqualification can be considered if there are many players. And it's also too harsh. Different situations can occur. Perhaps a player wins consistently but misses one round "due to family circumstances."
A duel would be a good idea. But if, for example, a person doesn't respond. Who would they duel with?
