The likelihood of a double checkmate is so slim that we shouldn't worry about it. But if it still happens we have the above rule that removes from the board the piece checkmating the Fake King. That would solve the problem. But we can still add a new rule forbidding double checkmate.
The likelihood of a double checkmate is so slim that we shouldn't worry about it. But if it still happens we have the above rule that removes from the board the piece checkmating the Fake King. That would solve the problem. But we can still add a new rule forbidding double checkmate.