press ducal strong claim

[geogus]

Hi guys

Ive away from Ckii for a long time and now im returning, taking all the rust away and remeering all the rules. This is harder with CKII plus rules

Im playing in the 86-something scneario.

Im a female count in the byzantine empire, my faith is chalcedonian and i have AC inheritalance law.

I have fabricated via plot a strong claim in the duchy (theme) my county is.

I have as prisioners both my liege lord (the duke) and his heir (not his son)

I have tried to matrilineal marry the son of the heir of the duchy, but it states i cant because im chalcedonian. ( if im correct this is because im have AC law, but the duchy is absolute cognatic and both the realms must be AC.. Is this right)


I cant usurp my lieges duchy altough he is my prisioner. Im not sure (maybe im wrong) but i think i might be able to release him in exchange for the title.

I tried to release him (blinded) but i cant declare war for my strong claim.

Why is that

 

[geogus]

I will try to be more clear


Charlemagne scneario, im female count with Agnatic cognatic sucession law in my county. My religion in chalcedonian. Im in byzantine empire

I have a strong claim (which i acquired via plot) over the duchy my county is located in.

The duchy inherithance law is absolute cognatic.

I have my liege imprisioned (as well his heir).

Even after I released him i cant declare war for my strong claim, only causus belli avaiable is independence.

Why cant i try to enforce my strong duchal claim with war?

Is it because my char is female and the duchy has Absolute Cognatic law? (according the wiki, u cant push strong claim of female char for AC laws, unless if your ruler is female and is pushing its own strong claim)

Is it because some crown authority law (my own, my duke liege´s or the byzantine empreros´s)

Something else?

Another question, is there a way i can exhange my liege release for his duke title, since i have a strong claim ( i think there is not, just asking, becausa i think something like that should be possible, like when u capture the ruler when your are at war with and war score goes to 100% automaticly)


I appreciate any help