[candybar]

I think this is one of those problems unique to online bridge, and handling it like a claim is a very reasonable suggestion, provided the line of play is clear enough (comparable to the claim statement made in an actual claim).

If I draw an analogy to f2f bridge, I'd choose a scenario where a player has to leave the game due to a sudden emergency, illness, etc, after x tricks had been played in a hand. How would you handle that?

I also think that a few of these situations that occur online but not in f2f may result in a few new Laws of Online Bridge, within a year or two