There are many cases where the winner is determined many rounds before the end. there are mathematical formulas that can easily work out when this is the case.
I would suggest that the winner be crowned as soon as the victory is inevitable.
(hide) If you are waiting for your turn, click on "change" next to the "refresh" on the main page, then set refresh the page to 30 seconds to get your turn to move displayed faster. (Servant) (show all tips)