Turn-based mode solves this problem. You can set 3 hours per game with time control in battles. This is called 10800+0. If the game hasn't finished, whoever spends their 3 hours first loses.
It's clear, just like in chess.
I used to play with a similar template, Panic mode with a limit of 7200+0.
Added 1 minute ago
Gaudin, sorry, but I think you won't be playing for that long.
