Crusader Kings III

Crusader Kings III

View Stats:
Any easier way of seeing what marriages will be inbred?
Even though the spouse says they're not of my dynasty it says they'll be a chance of inbreeding, so I'll go back and like their great great grandfather was part of my dynasty. But it makes it incredibly tedious to select each and every potential partner to see if it would be inbred?
< >
Showing 1-11 of 11 comments
Havan_IronOak Mar 31, 2023 @ 1:23pm 
Can't you tell from their culture, religion, and language which are pretty easily determined? Also, if they're not close ties, the chances are pretty minimal, no?
Duilf Mar 31, 2023 @ 1:40pm 
Don't worry about it too much.

Inbreeding is based on how many of the last 4 generations the couple has matching. This is a grand total of 30 people 2 parents, 4 grand parents, 8 great grand parents, and 16 great great grand parents. The risk factor of inbreeding increases exponentially. Even at 14 matches there is only a 4.6% chance to get a negative trait. From there is starts jumping 15 has 11.25%, 17 has a 17% chance, 20 has a 40%, and 30 has 90%. If you do the math the only ways to get 15+ matches in a single instance are full sibling, parent to child, and half sibling relations. As long as your side the the family is clean and you avoid those options it can't go above 14. If the marriage partner is really the bastard child of your seduction focused brother they will be at 14 pairs giving them 4.6% chance a kid will have a new negative trait so the odds of 2 of their kids having new negative traits is statistically unlikely. Even then the inbred trait is reserved for inbreeding couples who already have a trait from the inbreed pool of traits which is barren/sterile, scaly, club-footed, wheezing, spindly, giant, hunchbacked, bleeder, and dwarf. If a couple with a match without one of those traits has a bad role it will result in one of those traits or pure blooded. If a couple with a match with one of those traits has a bad role it will result in inbred or pure blooded.

So only the last 4 generations count, the risk factor is tiny unless you keep doing something repulsive, and there will be decently bad traits before you will ever see the horribly bad trait.
Last edited by Duilf; Mar 31, 2023 @ 1:42pm
Havan_IronOak Mar 31, 2023 @ 1:48pm 
Originally posted by Duilf:
Don't worry about it too much.

Inbreeding is based on how many of the last 4 generations the couple has matching.,,

So only the last 4 generations count, the risk factor is tiny unless you keep doing something repulsive, and there will be decently bad traits before you will ever see the horribly bad trait.

Repulsive? Tell it to the early Egyptians or just maybe the Tsars? Of course I'm playing the Rurik the Trouble maker scenario right now and I decided to include a little eugenics 4 generations in, I've got about 6 geniuses in the extended family. No Bad Congenital traits have shown up yet and I'm starting to start a family branch that concentrates on Beauty. When they start inter-marrying a few generations from now I should be getting a few super rulers.
Kimlin (Banned) Mar 31, 2023 @ 2:25pm 
If you begin in the early start date and expand/marry off your family even slightly efficiently, by 1100 or so, it become incredibly hard to find decent landed spouses who are not of your blood. I wouldn’t worry about it too much.
PDX-Trinexx  [developer] Mar 31, 2023 @ 10:43pm 
Stay on topic, folks.
dwarfpcfan Apr 1, 2023 @ 5:26am 
when check to arrange a marriage there should be a warning by scrolling down in the window if you accept or not that will say if they are related and there is a risk of inbreeding.

Also as long as you invest in the blood dynasty legacy and actually focus on heir quality rather then alliances you should never have that problem. marry your kids to peasants and low borns with inheritable traits and high stats, land these to create new noble houses and so forth.

after a few generations or perhaps earlier wit a little luck you should have the strong blooded trait unlocked and if you invested in the legacy have levels 3-4 of the legacy. then you'll be rolling around in genius heirs
Troubles The Cat Apr 1, 2023 @ 6:40am 
Originally posted by Havan_IronOak:
Can't you tell from their culture, religion, and language which are pretty easily determined? Also, if they're not close ties, the chances are pretty minimal, no?
But it's nice to marry into same faith/cultures?
Troubles The Cat Apr 1, 2023 @ 6:42am 
Originally posted by Kimlin:
If you begin in the early start date and expand/marry off your family even slightly efficiently, by 1100 or so, it become incredibly hard to find decent landed spouses who are not of your blood. I wouldn’t worry about it too much.
yup this is what has happened. Strangers from different continents different faith and cultures and it says chance of inbreeding QQ
Troubles The Cat Apr 1, 2023 @ 6:43am 
Originally posted by dwarfpcfan:
when check to arrange a marriage there should be a warning by scrolling down in the window if you accept or not that will say if they are related and there is a risk of inbreeding.

Also as long as you invest in the blood dynasty legacy and actually focus on heir quality rather then alliances you should never have that problem. marry your kids to peasants and low borns with inheritable traits and high stats, land these to create new noble houses and so forth.

after a few generations or perhaps earlier wit a little luck you should have the strong blooded trait unlocked and if you invested in the legacy have levels 3-4 of the legacy. then you'll be rolling around in genius heirs
THat was my question really, that is there any other way of seeing besides clicking on the arranged person, and checking to see if it says inbred, then clearing the character, reselecting sort by whatever and finding out where I was last in the list
ShepherdOfCats Apr 1, 2023 @ 6:51am 
Originally posted by Troubles The Cat:
THat was my question really, that is there any other way of seeing besides clicking on the arranged person, and checking to see if it says inbred, then clearing the character, reselecting sort by whatever and finding out where I was last in the list

I agree that would be very useful. Maybe have a portrait in the marriage UI of the characters causing the potential inbreeding issue, instead of a very vague "they are related" message. I'm not so worried if it is 3 generations back but if there was some sleeping around (as the AI has been known to do on occassion every chance it gets), it can throw off what lineage you're trying to trace. "oh but her mom wasn't great-great-great-grandpa's kid, it was the hunchbacked keeper of the swans"
Last edited by ShepherdOfCats; Apr 1, 2023 @ 6:55am
dwarfpcfan Apr 1, 2023 @ 8:30am 
Originally posted by Troubles The Cat:
THat was my question really, that is there any other way of seeing besides clicking on the arranged person, and checking to see if it says inbred, then clearing the character, reselecting sort by whatever and finding out where I was last in the list

You can pin a character by clicking on them. So if you find someone and check that person and it gives you the warning, just pin that character. You can then just cross check the list to eliminate any possible inbreeding
< >
Showing 1-11 of 11 comments
Per page: 1530 50

Date Posted: Mar 31, 2023 @ 12:46pm
Posts: 11