I had to detect and destroy them to finally win the game.
Therefore I suggest that a match ends automatically if some criterias are not fulfilled. I guess it would be a good choice to take over the "Stalemate Detection" from StarCraft II and do some slightly changes to adjust it to the function being described above and to make it detecting chanceless/deedless players/AI´s and end the game automatically.
Here is the original from StarCraft II:
-> http://eu.battle.net/sc2/en/blog/1691054Stalemate Detection has been added. This will end the game in a tie for all remaining players if no players have income, production, or destroyed structures for three consecutive minutes. A countdown timer will now appear when the game detects this scenario.
Kind regards,
Asgorath