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CK2 Dev Diary #106 - New Succession Laws Extravaganza

Greetings, everyone.

Well then, this is going to be a long one...

The old elective succession system has been succeeded


So your cousin the Duke of Burgundy always seem to nominate the Steve ‘the drunkard’ as the next Emperor of the realm rather than your favorite quick and attractive son. This has been a common theme for a bunch of our playthroughs while having the elective succession laws active for our main titles. One of the biggest problems about this is that the other electors reasonings for their nomination decisions has been hidden away in an opaque box so you never know which electors can be influenced to see things more in your way.


This was one of the first problems we wanted to address when we decided to rework the elective succession system. So instead of just giving you a list of names in the tooltips for whom casted votes on a given candidate we made a specific interface to enable us to give you a more detailed view into the minds of the powerful electors of the realm.

Succession Laws0.PNG


After it was possible to get a better look at why the electors made their decisions we wanted to make it easier to further edit the underlying factors which governs the AI. Therefor we decided to replicate the old logic from hardcoded conditions to instead be based on a scripted system which decides various rules of how the elective succession works.

This not only enables modding of the elective succession law, we now also allow you to create any number of your own elective rules to fill the world with different electorates that play by their own criterias. Maybe you always wanted to create your own technocratic republic that is governed only by the most learned people of the realm. The party realm might only allow drunkards and hedonists to have a say in whom should be this years party host.

For the people that are more interested in exactly how this is modifiable there’s a brief rundown of the syntax used to define the elective rules here:

Code:
### Condensed syntax layout:

#<elective_law_type> = {

#    candidate_vote_score = {

#        <Weight Modifiers>

#    }

#    elector_selection = {

#        max_amount = <int>

#        <Weight Modifiers> - if max_amount is set it will pick the X amount of top scorers.

#                Negative scores are considered invalid electors - Ruler is always an elector

#    }

#    elector_vote_strength = {

#        <Weight Modifiers>

#    }

#    elector_stances = { - Intended for the elder council positions

#        <stance_name> = {

#            icon = <int>

#            <Weight Modifiers>

#        }

#    }

#    candidate_trigger = {

#        <trigger>

#    }

#}


# <Weight Modifiers> - denotes a field of an arbitrary amount of triggered value modifiers eg.

#    additive_modifier = {

#        value = -4

#        is_tribal = yes

#    }

#

# <trigger> - denotes a field of conditions that needs to be evaluate true for the trigger to be fulfilled

#

# The elector will vote for the candidate with the highest score given by candidate_vote_score

# The electors are selected from the pool of characters which get a non-negative elector_selection score until we reach the max_amount

# elector_vote_strength will determine how much weight the vote of a single elector carries

# The elector will use the elector_stance with the highest score if any are scripted

# The stances are thought to be some kind of common thought process or allegiance for a subgroup of the electors - This system is used to create the different states for how the Elders will behave in the Eldership succession law explained in detail below

In addition to these underlying code changes of the elective succession forms we also added another usage of the Conclave favors so that you now can force electors to vote in compliance with your vote for the succession of a title.

Revamped Elective Laws


The unhardcoding of Elective successions allowed us to completely rewrite the AI behavior for the existing Elective laws accessible through the base game (Feudal Elective, Elective Gavelkind, Tanistry). The various conditions to be eligible as a successor or elector under these laws have remained unchanged (although now they have been translated into moddable script), while the AI electoral behavior has been rewritten into a long list of nuanced modifiers. You can now expect Electors to take into account how much they like a candidate, how legitimate they think his claim his to the title, and how much they trust the ruler that is voting for said candidate. Age, titles, character traits, culture, religion, dynastic ties and much more are now all taken into consideration by the AI and visible to the player when using the new Electors’ Tab. The sum of all these modifiers will result in a voting score, and the potential candidate who has the highest voting score will be the one selected by the Elector in question (and since each Elector has a different personality/status/etc. different kinds of Electors will prefer different kinds of candidates).

Succession Laws1.jpg



The Electors Tab shows to the player the complete list of Electors casting their vote, who they are voting for, the reasons why they are voting for said characters as well as a comparison with the candidate score of the ruler’s preferred candidate and the reasons why they are not voting for him.

Succession Laws2.jpg


Eldership

Somewhat similar to Tanistry, Eldership prevents your title from ever falling outside a ruler’s family, restricting the choice of potential candidates to members of the ruler’s dynasty. Under Eldership, only the six oldest and most learned characters in the realm will be allowed to pick the ruler’s successor. Each Elder can hold one of three possible stances at any given time, depending on how he feels about the ruler: Displeased, Pleased, or Ecstatic.

Making sure that your Elders have a high opinion of you, giving them their preferred Council positions (Chancellor, Steward, Chaplain), or fulfilling the occasional request from them, will push them further to become Ecstatic.

20180824080508_1.jpg


An Ecstatic Elder will almost always vote for the ruler’s chosen candidate, almost never make demands, and even give the occasional piece of advice to make you a better person.

20180824080639_1.jpg


Pleased Elders will try to vote for what they consider to be good and capable candidates amongst the members of your dynasty, favoring older characters with high stewardship. They might occasionally make some demands, such as asking a ruler to give some land to a family member that they really like, but they will, for the most part, be reasonable people to deal with.

Displeased Elders on the other hand, will be much harder to deal with. Not only will they purposefully select bad candidates, they will occasionally grant claims on your title to people that they like, openly questioning their liege’s right to rule.

20180824080819_1.jpg


Holy Fury will allow the Baltic and African realms to start with Eldership as default succession law, rather than Elective Gavelkind. Additionally, other pagans can unlock this succession by picking the right Doctrine when they Reform their faith.

Princely Elective
This new variation on elective has been scripted to replace Feudal Elective for the Holy Roman Empire. This succession limits the electors to a maximum of seven (plus the ruling Emperor) and makes it so the historical titles held by the Prince-Electors are prioritized when determining the valid electors in the Empire, these titles being the Bishoprics of Mainz, Koln and Trier, and the Duchies of Bohemia, Franconia, Saxony, and Brandenburg. If an elector title does not exist or his held by the Emperor, another valid Duke will replace it (prioritizing dejure vassals of the same religion as the ruling Emperor).

20180824081547_1.jpg


Electors under Princely Elective are overall much less likely to pick candidates that are either impious or of a different religion, and Theocratic Catholic Electors have twice as much voter strength than secular Electors whenever the Empire is under Papal Investiture.

While rulers of the Holy Roman Empire can still change the realm’s succession law as usual, the faction for Elective has been made much more easily accessible and palatable for vassals of the HRE and requirements to switch away from this succession have been made more restrictive (the ruler must have Max Centralization and either Absolute Crown Authority or Abolished Council Power).

Imperial Elective
And finally, a completely new succession law has been scripted for the Byzantine (and Roman) Empire, to better represent the peculiar politics of this realm. This succession has been tied to the two titles and is now also the *only* succession law that they have available. There are several features that are unique to this succession law, so I will explain it in sections:

20180824081910_1.jpg


Successors: Potential candidates under Imperial Elective include the Emperor’s children and close family members (spouse included), any claimants to the title, the current Marshal, and any Commander under the Emperor, with mutilated characters being excluded. This is to represent the influence of the military over Byzantium and allow more historical instances of influential commanders becoming Emperors.

Imperial Court: The Emperor, all of his Councilors, and all of his Commanders are valid electors. As Byzantium was a centralized power, the Emperor will need to curry the favor of the most powerful members of his court to ensure that his dynasty continues to maintain the throne, rather than his vassals, like a Feudal ruler would.

Scaled Voting Power: And this is where things get really interesting. Imperial Elective uses to its full extent the new voter_power function of scripted elective, making sure that every elector has a different amount of influence, entirely dependent on his status in the court and his attributes. The Emperor’s vote starts out with a strength of 200 voting power, which can be further boosted by good diplomacy and martial scores, making it so that a powerful and influential Emperor will be able to push the candidate that he wants on the throne even if most of the Court is against it. Conversely, if the Emperor is not Born in the Purple, deformed or crippled, or if he has made a reputation of appointing sycophants in his court (more on that below), he will see his voting power plummet. The other Electors have their own variable voting power, tied to prestige, rank and attributes (a Steward with high stewardship is more influential than an incompetent one). As such, appointing competent people to be your councilors and commanders will not only mean that your favorite son will have to compete with more competent and palatable candidates, but also that the electors will have a greater influence over the succession. Finally, minor titles can also affect a character’s voting power, so you might want to think a bit more before giving out your Caesar and Sebastokrator spots.

20180824082114_1.jpg


Heroes and Sycophants: Is Belisarius too popular a Commander for your sons to compete with him? Well, you can always discharge him: take away his status as Commander and he will no longer be a potential candidate or an elector, problem solved. Except... when under Imperial Elective, removing a competent Commander or Councilor from his position reduces the Emperor’s voting power of an amount proportional to the competence of the character you are removing. The more competent people the Emperor pushes out of his court, the less his vote will be worth overall. Same applies whenever an Emperor appoints a commander with poor martial score while there are clearly superior choices available: the court will notice that you are appointing mediocre sycophants because you fear competition and you will see your voting power go down. Additionally, Imperial Elective prevents Emperors from appointing landless commanders for as long as potential vassals are available to take the spot. If you wish that high-martial courtier to lead your armies, you will need to give him a proper title first.

Prestige and Ageism: This is not Feudal Elective, the Empire does not care as much about family ties and character traits, it cares about placing a competent and prestigious leader upon the throne. For the Byzantine Empire, this translates to the electors tending to favor skilled high-Intrigue characters, whereas the Roman Empire electors are keener on good orators (high Diplomacy). In both Empires, the electors will always favor people that are competent at their job, that have high prestige and titles (both minor and landed). One of the most visible consequences of this is that hardly anyone under Imperial Elective will ever consider a child to be a valid successor to the throne. If you wish your son to take your place, you will have to groom him first, wait for him to become adult, then push his bid to your Empire, possibly giving him a few honorary and landed titles along the way. While he’s still a toddler, it might be more sensible for you to appoint your younger brother, or your old uncle as preferred heir, just in case something happens before the little Prince comes of age...

20180824082155_1.jpg


Strong Claim Duel
Somewhat related to all these new succession forms, we have also added a new type of duel designed to let players keep their realms together after an Elective Gavelkind succession. This Strong Claim Duel is available regardless of whether you have the War Focus active, or if you are a member of a Warrior Lodge (which is otherwise required for regular dueling). As a tribal character, with a Strong Claim on a title currently held by a tribal ruler, it will be possible to issue a challenge to the current title holder, with the requirement of your target ruler either being independent, or both of you being vassals under the same liege. Bear in mind that the stakes in these duels are high, and losing does not only mean you give up your claims - unless you have a particularly kind opponent, who loves you dearly, death is the common way out of this dispute. Winning, on the other hand, means that you take the title in question and any vassals that come with it, along with any other of their titles on which you have a Strong Claim.

If the target of your Claim Duel happens to be an AI character of your own Dynasty, losing will present players with a choice: accept your fate, or click the option to take over as the character who won the duel, and continue to play the game as the kinsman (or woman) who bested you.

Succession Laws3.jpg
 
What I mean is, if you go into common/realm_decisions.txt, you will find two decisions: form_the_hre and form_the_hre_early. The former will enable Princely Elective automatically, the second will not.

Can I change the SL of the HRE to Princely Elective if I used the form_the_hre_early Decision?
 
Thank you for your patient answer!
And there is another question:
DqcWyi8UUAEUozS.jpg:large

Is this law still exist?I mean,is there still “Feudal vassal opinion -10”?
Yes.
Can I change the SL of the HRE to Princely Elective if I used the form_the_hre_early Decision?
Yes, Princely Elective replaces Feudal Elective for the HRE, it has otherwise the same requirements.
 
I am curious about Heir Designation + Elective Succession. Given that the Hellenic unique trait adds that, and the Roman Empire forces Imperial Elective, I am wondering if Heir Designation adds extra usefulness in an Elective system?
 
So Elective Gavelkind is no longer horrible?
Sign me up!
 
Do religious heads have a greater voting power in elections, by default? How about Sayyid and Saoshyant Descendant?

I'm guessing not, unless it can dynamically check the religion of the current title holder - or more appropriately, what the general state religion should be, which would be hard to model.

I've already started to think of some things we could do with this modding...

Opt out of elections
Create a special "Unelectable" and accompanying Player-only decision to gain or remove that trait at will. This trait would be put in all Elective succession pieces of code to give a massive penalty to eligibility for election/removes you from contention entirely.

This would be very handy for runs where you as a player don't want to be elected.

Non-Germania HRE Princely Elective
Variants of the Princely Elective succession law to remove the prioritisation of the major German elector titles, to account for when a player creates the HRE with a title other than the historical one.

This is particularly relevant for Italia and Francia.

One could even specify some specific duchies (or Kingdoms) which are likely to have priority based on historical factors, e.g. taking inspiration from the Peerages of France, where the Dukes of Aquitaine/Burgundy/Normandy along with a collection of other Counts and Bishops (especially the Archbishop of Reims) had primacy.

Muslim Elective
This could be a replacement for Open/Turkish succession, and would be based on Elder Elective. It would prioritise dynasts (although allowing powerful/skilled council members a chance, e.g. Vizier of Fatimid Egypt) give a significant penalty to children being elected, would strongly prioritise sons > brothers > uncles, and would also prioritise landed title holders (especially with more/greater titles or realm size).

I'd also be tempted to make any valid Candidate who was a Caliph/Imam/Shiekh of the same religion of the current top-realm ruler have a greater priority.

This would make it a lot like Open Succession, but less gamey, more nuanced and a bit more interesting to play.

Misc Elective Variants

You could do lots of other variants for different religions, which could be used for each religion (assuming Sayyid/Saoshyant Descendant/Religious Head don't already have priority in game):
  • Caliphal - Very much like the Byzantine Imperial Elective to represent the nature of the early start date Umayyad (and what an ahistorical Muslim empire in CK2 would probably have to be like), but makes Sayyid have much higher priority, and you could do a copy+paste variant for every sect/heresy to make the Caliph/Imam/Shiekh of that religion have a much higher priority, too, particularly if they're a dynast. (I'd also be tempted to make them have more way as an elector, but that wouldn't represent the Ilkhanate well if they became Imperial (they had the Abbasid Caliphs as puppet vassals).)

  • Zoroastrian - Like the Muslim variant, but with Saoshyant Descendant instead of Sayyid.

  • Pagan Variants - Make a variant for each non-Abrahamic religion which makes it so that if they reform with a Temporal Head of religion, the Temporal Head has more voting power and/or candidate score.
To do those justice you'd probably have to code a special Realm Law which would be very hard to change, but would specify the state religion. You'd then tie the type of Elective (and ability to revoke, ideally) to this.

In fact, that'd be a great idea to change how easy it is to convert the realm etc., to be honest.
 
As we are talking about locked succession laws to certain titles.. could it now be more unlikely to have regnant queens of France of Holy Roman Empresses? Women never ruled these countries, the Hundred Year war was even about if a female could inherit France or if she could pass on a valid claim to her children and Maria Teresa of Austria as heiress to HRE was also contested in war. Even the Byzantines had only two to three regnant empresses, but in the game girls seems to inherit frequently and with no problem.

Hopefully this new imperial succession law will fix that.

Maria Teresa never was Heiress to the HRE nor did she fight over the Crown of the HRE. She fought to keep the Austrian Terretory intact.

The Pragmatic Sanctions only covered the Austrian titles, not the HRE. EU4 represent it wrong. At least the last time I played.

Also she is way out of time frame.
 
For Imperial Elective, will each elected emperor be given control of Constantinople to avoid de jure revocation wars every single time someone is elected?
 
For Imperial Elective, will each elected emperor be given control of Constantinople to avoid de jure revocation wars every single time someone is elected?

With Legacy of Rome, the Byzantine Emperor already has a decision (with a high priority for the AI) to instantly usurp c_byzantion without penalty - the claim_constantinople decision.

It might be a tiny bit messy for Constantinople title history, as they'll have to revoke upon election each time, but there'll be no problems with it in terms of civil war. Pity it doesn't extent to all of d_thrace if the ex-Emperor's non-Imperial heir holds those lands.
 
I know its late to ask, but will we get a Rota System for Kievan Rus, or something like that? I saw elderly "somewhat fit", but it never hurts to ask. Russia is really cool on this period. (If not one of the top 3 most cool places after byz and karling/hre, if you ask me)
 
I know its late to ask, but will we get a Rota System for Kievan Rus, or something like that? I saw elderly "somewhat fit", but it never hurts to ask. Russia is really cool on this period. (If not one of the top 3 most cool places after byz and karling/hre, if you ask me)

I was thinking that too. Presumably one could mod it by hard coding the various Duchies/Kingdoms in the Rus as electors, but it might be a pain. The biggest problem is relinquishing each person's title down the chain, but it is probably moddable with a lot of work.
 
I’m glad that the HRE and ERE have unique succcession types. They were the original de jure empires in the game at launch, and it’s njce that they both have unique mechanics to depict their historical roles.

Yes, anyone can create an empire and adopt imperial admin but I’d like to leave something unique for these two empires.

Besides; it’s all open to modding now which is great for everything. People can add new succession types and governments to their heart’s content.


But why? In the old roman Republic the Senate didn’t elect the Consul.

After Tiberius removed curule elections from the Comitia Centuriata, the Senate did in fact elect the consuls. Usually this just meant ratifying the emperor’s selection, though.

Sounds like a fun elective type for a mod. I’d play it, if someone made it.
 
With Legacy of Rome, the Byzantine Emperor already has a decision (with a high priority for the AI) to instantly usurp c_byzantion without penalty - the claim_constantinople decision.

It might be a tiny bit messy for Constantinople title history, as they'll have to revoke upon election each time, but there'll be no problems with it in terms of civil war. Pity it doesn't extent to all of d_thrace if the ex-Emperor's non-Imperial heir holds those lands.
Oh I didn't actually know that, thanks. And at least with the way the Duchy of Thrace is we can just ensure that it goes to one of your dynasty members or maybe to someone fun like the Guard-Nords.
 
Do religious heads have a greater voting power in elections, by default? How about Sayyid and Saoshyant Descendant?
Not in any vanilla succession, but it can be easily modded in.
 
Will it be possible to script the succession laws so that several titles under elective all go to the winner of the main title?
i.e. if I have three kingdoms, all with elective succession, can it be possible to make it so that all three are tied under the succession of the main one?
 
Will Imperial override iqta and monastic feudal so you can play Shia Rome or Bodpa Byzantium?
 
Will the switch to scripted rules make it possible to have full cognatic elective realms? Even if it's just moddable now?
Can I have a female Kaiserin on the throne of the HRE?

And did you also script the merchant republic rules now? So is it now possible to mod in the possibility for female doges?
 
I love this sooo much for my sneaky-Sicily-duchess-who-always-marries-Basil-and-kills-his-children-so-that-hers-can-inheret game, hopefully (since she's always the lethally competent spymaster after she marries him) this'll make it legitimately feasible to become empress directly, instead of always being throne-adjacent until I take over it with military might. I've wanted that playthrough for so, so long.

Anyway, question: do Romuva and African pagans retain the eldership succession upon reformation or do they need to pick a doctrine to keep it?
 
Out of curiosity, suppose I am playing as Charlemagne, and I create the HRE - what happens to the succession type of my kingdom titles? Will they also switch to Princely Elective, be destroyed when I create the HRE, or am I doomed to be sabotaged by Gavelkind no matter what as Charlemagne?