DISCUSSIONS on “Rules for online games in HoMM3 and formulas for calculating player rating.”

In principle, you could require the player who receives the "best" Castle on day 111 to build a Market and transfer the required amount to their opponent. Although, for some Castles, losing one day is critical.

By the way, here's another option. I read somewhere that the stronger player would give a one-day advantage. They would simply skip a day. Maybe we could also set a day advantage? (buildings can still be built, of course).