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I also don't understand how anyone can compare fun games to tournaments. You play fun games just to play, so you can have auto-saves and restart the game 100 times. But in a tournament – I'm sorry, you have to use your restarts thoughtfully. If you can't find a solution, confirm the loss.
Someone says, "Winning on turn 111 isn't heroic." But in my opinion, begging for a Priest or an Archmage is even less heroic. If your opponent offers it, take it, but if they don't, confirm the loss. Personally, I wouldn't feel comfortable knowing that I technically lost, and then playing to win and submitting a report if I win. And since I can't allow myself to do that, I shouldn't expect my opponent to either. It's a matter of personal ethics, IMHO.