Difficulty: MediumThe de jure territory of Kingdom of Bohemia starts controlled entirely, but you need more Gold for the last Duchy and the Kingdom (750 Gold combined). Now, the big problem is that you are still a Vassal of the Holy Emperor. At the beginning of the Game select the Stewardship lifestyle but you only need the Meritocracy perk. After you completed this, start a Claim Throne Scheme against the Holy Emperor. If you have success create a Claim Throne Faction. Now you have two options: The first one is when you have a little luck. If there are many not happy Vassals they will join your faction and when you have enough men you can press demands. Do this only if you are above 100%!!! The other way is to change your lifestyle and choose the Intrigue lifestyle. Now go for Skullduggery. The important perk is the Abduction one. If you got that start a Scheme trying to abduct the Holy Emperor. When you had success, press demands with your faction and you immediately get 100%. Now you are a Holy Emperor yourself!
Simply, wait a few months and you will have enough gold to create the Duchy of Moravia. Then make no expenses for a few years and you'll be able to create the Kingdom of Bohemia.
Credit to
Bayek von Kuwaq on Steam for his
guide.