CK3 DatabaseCrusader Kings III · 1.20.1.2 “Crozier” · unofficial
MapCulturesFaiths
Silk & Silverout Tue, Nov 17What's free, what needs the DLC, price →

Interaction · Friendly actions

Challenge to Board Game

No costThe AI weighs it (the answer is partly random)

Play the recipient at a Board Game

What you need

You

To send it

  • Is at least 8 years old

  • If

    Then

  • Also needed: available (not in an army, not imprisoned, not incapable) · none of the traits Consumption, Typhus, Bubonic Plague, Smallpox, Measles, Bloody Flux · not busy in an Activity · not planning another Activity · not busy in a Mandala succession

To see it in the menu

The character you target

  • Is at least 8 years old
  • Character cannot currently play a board game

  • Also needed: available (not in an army, not imprisoned, not incapable) · none of the traits Consumption, Typhus, Bubonic Plague, Smallpox, Measles, Bloody Flux · not busy in an Activity · not planning another Activity · not busy in a Mandala succession

Challenge to Board Game is a friendly character interaction in Crusader Kings III. You need: Is available (not in an army, not imprisoned, not incapable), Has none of the traits: Consumption, Typhus, Bubonic Plague, Smallpox, Measles, Bloody Flux, You are currently busy … and 3 more. The character you target needs: Is available (not in an army, not imprisoned, not incapable), Has none of the traits: Consumption, Typhus, Bubonic Plague, Smallpox, Measles, Bloody Flux, Busy participating in an Activity and 4 more. The AI weighs it (the answer is partly random). Reasons the AI weighs include Low stakes (+20), Gregarious loves the idea of a Friendly Game (+40), Humble loves the idea of a Friendly Game (+40) and 41 more. Patch 1.20.1.2, from game/common/character_interactions/03_fp2_interactions.txt.

for a guide, post or blog
Quick answers (2)
What are the requirements for Challenge to Board Game in CK3?
You: Is available (not in an army, not imprisoned, not incapable), Has none of the traits: Consumption, Typhus, Bubonic Plague, Smallpox, Measles, Bloody Flux, You are currently busy …, You are already planning another Activity, You are currently busy in a Mandala succession and Is at least 8 years old. The character you target: Is available (not in an army, not imprisoned, not incapable), Has none of the traits: Consumption, Typhus, Bubonic Plague, Smallpox, Measles, Bloody Flux, Busy participating in an Activity, You are already planning another Activity, You are currently busy in a Mandala succession, Is at least 8 years old and Character cannot currently play a board game. (patch 1.20.1.2)
How do I get the AI to accept Challenge to Board Game?
The AI weighs it (the answer is partly random). Its reasons: … Opinion of …, My Skill, Low stakes +20, Gregarious loves the idea of a Friendly Game +40, Humble loves the idea of a Friendly Game +40, Shy likes the idea of a Friendly Game +20, Compassionate likes the idea of a Friendly Game +20, Callous dislikes the idea of a Friendly Game -20, Greedy hates the idea of just a Friendly Game -40, Arrogant hates the idea of just Friendly Game -40, Brave hungers to Wager Fame +40, Arrogant hungers to Wager Fame +40, Gregarious wishes to Wager Fame +20, Ambitious wishes to Wager Fame +20, Content does not wish to Wager Fame -20, Shy does not wish to Wager Fame -20, Humble wishes to Wager Fame -40, Craven wishes to Wager Fame -40, Profligate wishes to Wager Fortune +60, Greedy wishes to Wager Fortune +40, Ambitious wishes to Wager Fortune +20, Generous wishes to Wager Fortune +20, Lazy wishes to Wager Fortune +20, Diligent wishes to Wager Fortune -40, Profligate wishes to Wager Land +60, Arbitrary wishes to Wager Land +40, Ambitious wishes to Wager Land +20, Brave wishes to Wager Land +20, Craven does not wish to Wager Land -20, Content does not wish to Wager Land -20, Just thinks it would be illegal to Wager Land -60, We have a positive Special Relationship +20, We have a positive Special Relationship +40, We have a positive Special Relationship +60, We have a negative Special Relationship -20, We have a negative Special Relationship -40, We have a negative Special Relationship -60, I want to destroy you at games +20, I want to destroy you at games +40, I want to destroy you at games +60, Rank Difference +15, Rank Difference +10, Rank Difference +5, Rank Difference -10, Rank Difference -20 and Rank Difference -30.

Will they accept?

The AI adds these up and accepts above zero; near zero the answer is partly random (ai_maybe). Reasons in italics are the script's, with no label in the game.

ReasonAmount
Base0
Their personality (AI values: boldness (scripted), sociability (scripted))varies
Their personality (AI values: boldness (scripted), sociability (scripted))varies
… Opinion of …varies
My Skillvaries
Low stakes
when
+20
Gregarious loves the idea of a Friendly Game
when
  • The option “chess friendly” is chosen
  • The character you target: Has the Trait: Gregarious
+40
Humble loves the idea of a Friendly Game
when
  • The option “chess friendly” is chosen
  • The character you target: Has the Trait: Humble
+40
Shy likes the idea of a Friendly Game
when
  • The option “chess friendly” is chosen
  • The character you target: Has the Trait: Shy
+20
Compassionate likes the idea of a Friendly Game
when
  • The option “chess friendly” is chosen
  • The character you target: Has the Trait: Compassionate
+20
Callous dislikes the idea of a Friendly Game
when
  • The option “chess friendly” is chosen
  • The character you target: Has the Trait: Callous
-20
Greedy hates the idea of just a Friendly Game
when
  • The option “chess friendly” is chosen
  • The character you target: Has the Trait: Greedy
-40
Arrogant hates the idea of just Friendly Game
when
  • The option “chess friendly” is chosen
  • The character you target: Has the Trait: Arrogant
-40
Brave hungers to Wager Fame
when
  • The option “chess prestige” is chosen
  • The character you target: Has the Trait: Brave
+40
Arrogant hungers to Wager Fame
when
  • The option “chess prestige” is chosen
  • The character you target: Has the Trait: Arrogant
+40
Gregarious wishes to Wager Fame
when
  • The option “chess prestige” is chosen
  • The character you target: Has the Trait: Gregarious
+20
Ambitious wishes to Wager Fame
when
  • The option “chess prestige” is chosen
  • The character you target: Has the Trait: Ambitious
+20
Content does not wish to Wager Fame
when
  • The option “chess prestige” is chosen
  • The character you target: Has the Trait: Content
-20
Shy does not wish to Wager Fame
when
  • The option “chess prestige” is chosen
  • The character you target: Has the Trait: Shy
-20
Humble wishes to Wager Fame
when
  • The option “chess prestige” is chosen
  • The character you target: Has the Trait: Humble
-40
Craven wishes to Wager Fame
when
  • The option “chess prestige” is chosen
  • The character you target: Has the Trait: Craven
-40
Profligate wishes to Wager Fortune
when
  • The option “chess gold” is chosen
  • The character you target: Has the Trait: Profligate
+60
Greedy wishes to Wager Fortune
when
  • The option “chess gold” is chosen
  • The character you target: Has the Trait: Greedy
+40
Ambitious wishes to Wager Fortune
when
  • The option “chess gold” is chosen
  • The character you target: Has the Trait: Ambitious
+20
Generous wishes to Wager Fortune
when
  • The option “chess gold” is chosen
  • The character you target: Has the Trait: Generous
+20
Lazy wishes to Wager Fortune
when
  • The option “chess gold” is chosen
  • The character you target: Has the Trait: Lazy
+20
Diligent wishes to Wager Fortune
when
  • The option “chess gold” is chosen
  • The character you target: Has the Trait: Diligent
-40
Profligate wishes to Wager Land
when
  • The option “chess land” is chosen
  • The character you target: Has the Trait: Profligate
+60
Arbitrary wishes to Wager Land
when
  • The option “chess land” is chosen
  • The character you target: Has the Trait: Arbitrary
+40
Ambitious wishes to Wager Land
when
  • The option “chess land” is chosen
  • The character you target: Has the Trait: Ambitious
+20
Brave wishes to Wager Land
when
  • The option “chess land” is chosen
  • The character you target: Has the Trait: Brave
+20
Craven does not wish to Wager Land
when
  • The option “chess land” is chosen
  • The character you target: Has the Trait: Craven
-20
Content does not wish to Wager Land
when
  • The option “chess land” is chosen
  • The character you target: Has the Trait: Content
-20
Just thinks it would be illegal to Wager Land
when
  • The option “chess land” is chosen
  • The character you target: Has the Trait: Just
-60
We have a positive Special Relationship
when
  • The character you target:

    • One of these

      • Has you as potential lover

      • or

        Has you as crush

      • or

        Has you as potential friend

      • or

        Has you as guardian

      • or

        Has you as ward

      • or

        Has you as elder

      • or

        Has you as disciple
+20
We have a positive Special Relationship
when
  • The character you target:

    • One of these

      • Has you as lover

      • or

        Has you as friend

    • None of these

      • One of these

        • Has you as best friend

        • or

          Has you as soulmate
+40
We have a positive Special Relationship
when
  • The character you target:

    • One of these

      • Has you as best friend

      • or

        Has you as soulmate
+60
We have a negative Special Relationship
when
  • The character you target:

    • One of these

      • Has you as potential rival

      • or

        Has you as victim

      • or

        Has you as bully

    • None of these

-20
We have a negative Special Relationship
when
  • The character you target:
-40
We have a negative Special Relationship
when
-60
I want to destroy you at games
when
  • The character you target:
+20
I want to destroy you at games
when
+40
I want to destroy you at games
when
+60
Rank Difference
when
  • tier_difference = { target = scope:recipient value >= 4 }
+15
Rank Difference
when
  • tier_difference = { target = scope:recipient value = 3 }
+10
Rank Difference
when
  • tier_difference = { target = scope:recipient value = 2 }
+5
Rank Difference
when
  • tier_difference = { target = scope:recipient value = -2 }
-10
Rank Difference
when
  • tier_difference = { target = scope:recipient value = -3 }
-20
Rank Difference
when
  • tier_difference = { target = scope:recipient value <= -4 }
-30
Acceptance (ai_accept) (305 lines of game script)
base = 0
ai_value_modifier = {
	who = scope:recipient
	trigger = {
		has_trait = shy
	}
	ai_boldness = {
		if = {
			limit = {
				scope:recipient = {
					NOT = {
						ai_boldness = 0
					}
				}
			}
			value = 1
		}
	}
	ai_sociability = {
		if = {
			limit = {
				scope:recipient = {
					NOT = {
						ai_honor = 0
					}
				}
			}
			value = -0.5
		}
	}
}
ai_value_modifier = {
	who = scope:recipient
	trigger = {
		NOT = {
			has_trait = shy
		}
	}
	ai_boldness = {
		if = {
			limit = {
				scope:recipient = {
					NOT = {
						ai_boldness = 0
					}
				}
			}
			value = 1
		}
	}
	ai_sociability = {
		if = {
			limit = {
				scope:recipient = {
					NOT = {
						ai_honor = 0
					}
				}
			}
			value = 0.5
		}
	}
}
opinion_modifier = {
	who = scope:recipient
	opinion_target = scope:actor
	multiplier = 0.5
	desc = AI_OPINION_REASON
}
modifier = {
	add = {
		add = scope:recipient.martial
		add = scope:recipient.intrigue
		add = scope:recipient.learning
	}
	desc = BG_OPINION_OWN_SKILL_ASSESSMENT
}
modifier = {
	add = 20
	always = scope:chess_friendly
	scope:recipient = {
		NOR = {
			has_trait = callous
			has_trait = greedy
			has_trait = arrogant
		}
	}
	desc = BG_OPINION_STAKES_ARE_LOW
}
modifier = {
	add = 40
	scope:recipient = {
		has_trait = gregarious
	}
	always = scope:chess_friendly
	desc = BG_OPINION_FRIENDLY_TRAIT_GREGARIOUS
}
modifier = {
	add = 40
	scope:recipient = {
		has_trait = humble
	}
	always = scope:chess_friendly
	desc = BG_OPINION_FRIENDLY_TRAIT_HUMBLE
}
modifier = {
	add = 20
	scope:recipient = {
		has_trait = shy
	}
	always = scope:chess_friendly
	desc = BG_OPINION_FRIENDLY_TRAIT_SHY
}
modifier = {
	add = 20
	scope:recipient = {
		has_trait = compassionate
	}
	always = scope:chess_friendly
	desc = BG_OPINION_FRIENDLY_TRAIT_COMPASSIONATE
}
modifier = {
	add = -20
	scope:recipient = {
		has_trait = callous
	}
	always = scope:chess_friendly
	desc = BG_OPINION_FRIENDLY_TRAIT_CALLOUS
}
modifier = {
	add = -40
	scope:recipient = {
		has_trait = greedy
	}
	always = scope:chess_friendly
	desc = BG_OPINION_FRIENDLY_TRAIT_GREEDY
}
modifier = {
	add = -40
	scope:recipient = {
		has_trait = arrogant
	}
	always = scope:chess_friendly
	desc = BG_OPINION_FRIENDLY_TRAIT_ARROGANT
}
modifier = {
	add = 40
	scope:recipient = {
		has_trait = brave
	}
	always = scope:chess_prestige
	desc = BG_OPINION_PRESTIGE_TRAIT_BRAVE
}
modifier = {
	add = 40
	scope:recipient = {
		has_trait = arrogant
	}
	always = scope:chess_prestige
	desc = BG_OPINION_PRESTIGE_TRAIT_ARROGANT
}
modifier = {
	add = 20
	scope:recipient = {
		has_trait = gregarious
	}
	always = scope:chess_prestige
	desc = BG_OPINION_PRESTIGE_TRAIT_GREGARIOUS
}
modifier = {
	add = 20
	scope:recipient = {
		has_trait = ambitious
	}
	always = scope:chess_prestige
	desc = BG_OPINION_PRESTIGE_TRAIT_AMBITIOUS
}
modifier = {
	add = -20
	scope:recipient = {
		has_trait = content
	}
	always = scope:chess_prestige
	desc = BG_OPINION_PRESTIGE_TRAIT_CONTENT
}
modifier = {
	add = -20
	scope:recipient = {
		has_trait = shy
	}
	always = scope:chess_prestige
	desc = BG_OPINION_PRESTIGE_TRAIT_SHY
}
modifier = {
	add = -40
	scope:recipient = {
		has_trait = humble
	}
	always = scope:chess_prestige
	desc = BG_OPINION_PRESTIGE_TRAIT_HUMBLE
}
modifier = {
	add = -40
	scope:recipient = {
		has_trait = craven
	}
	always = scope:chess_prestige
	desc = BG_OPINION_PRESTIGE_TRAIT_CRAVEN
}
modifier = {
	add = 60
	scope:recipient = {
		has_trait = profligate
	}
	always = scope:chess_gold
	desc = BG_OPINION_GOLD_TRAIT_PROFLIGATE
}
modifier = {
	add = 40
	scope:recipient = {
		has_trait = greedy
	}
	always = scope:chess_gold
	desc = BG_OPINION_GOLD_TRAIT_GREEDY
}
modifier = {
	add = 20
	scope:recipient = {
		has_trait = ambitious
	}
	always = scope:chess_gold
	desc = BG_OPINION_GOLD_TRAIT_AMBITIOUS
}
modifier = {
	add = 20
	scope:recipient = {
		has_trait = generous
	}
	always = scope:chess_gold
	desc = BG_OPINION_GOLD_TRAIT_GENEROUS
}
modifier = {
	add = 20
	scope:recipient = {
		has_trait = lazy
	}
	always = scope:chess_gold
	desc = BG_OPINION_GOLD_TRAIT_LAZY
}
modifier = {
	add = -40
	scope:recipient = {
		has_trait = diligent
	}
	always = scope:chess_gold
	desc = BG_OPINION_GOLD_TRAIT_DILIGENT
}
modifier = {
	add = 60
	scope:recipient = {
		has_trait = profligate
	}
	always = scope:chess_land
	desc = BG_OPINION_LAND_TRAIT_PROFLIGATE
}
modifier = {
	add = 40
	scope:recipient = {
		has_trait = arbitrary
	}
	always = scope:chess_land
	desc = BG_OPINION_LAND_TRAIT_ARBITRARY
}
modifier = {
	add = 20
	scope:recipient = {
		has_trait = ambitious
	}
	always = scope:chess_land
	desc = BG_OPINION_LAND_TRAIT_AMBITIOUS
}
modifier = {
	add = 20
	scope:recipient = {
		has_trait = brave
	}
	always = scope:chess_land
	desc = BG_OPINION_LAND_TRAIT_BRAVE
}
modifier = {
	add = -20
	scope:recipient = {
		has_trait = craven
	}
	always = scope:chess_land
	desc = BG_OPINION_LAND_TRAIT_CRAVEN
}
modifier = {
	add = -20
	scope:recipient = {
		has_trait = content
	}
	always = scope:chess_land
	de
# … (cut here; the rest is in the file)

As written in game/common/character_interactions/03_fp2_interactions.txt.

What happens

If they accept

  • If

    • scope:bg_interaction_game_type = flag:pachisi

    Then

    • Else, if all of these hold:
      • Conditions:
        • scope:bg_locale = flag:random_nice_day
      • Then › 1 of 3 things will happen:
        • 33%: Nothing else happens
        • 33%: Nothing else happens
        • 33%: Nothing else happens
    • The bg defender: Event board_games.0001

  • If

    • scope:bg_interaction_game_type = flag:hnefatafl

    Then

    • Else, if all of these hold:
      • Conditions:
        • scope:bg_locale = flag:random_nice_day
      • Then › 1 of 3 things will happen:
        • 33%: Nothing else happens
        • 33%: Nothing else happens
        • 33%: Nothing else happens
    • The bg defender: Event board_games.0001

  • If

    • scope:bg_interaction_game_type = flag:tabula

    Then

    • Else, if all of these hold:
      • Conditions:
        • scope:bg_locale = flag:random_nice_day
      • Then › 1 of 3 things will happen:
        • 33%: Nothing else happens
        • 33%: Nothing else happens
        • 33%: Nothing else happens
    • The bg defender: Event board_games.0001

  • If

    • scope:bg_interaction_game_type = flag:go

    Then

    • Else, if all of these hold:
      • Conditions:
        • scope:bg_locale = flag:random_nice_day
      • Then › 1 of 3 things will happen:
        • 33%: Nothing else happens
        • 33%: Nothing else happens
        • 33%: Nothing else happens
    • The bg defender: Event board_games.0001

  • If

    • scope:bg_interaction_game_type = flag:fidchell

    Then

    • Else, if all of these hold:
      • Conditions:
        • scope:bg_locale = flag:random_nice_day
      • Then › 1 of 3 things will happen:
        • 33%: Nothing else happens
        • 33%: Nothing else happens
        • 33%: Nothing else happens
    • The bg defender: Event board_games.0001

  • If

    • scope:bg_interaction_game_type = flag:chess

    Then

    • Else, if all of these hold:
      • Conditions:
        • scope:bg_locale = flag:random_nice_day
      • Then › 1 of 3 things will happen:
        • 33%: Nothing else happens
        • 33%: Nothing else happens
        • 33%: Nothing else happens
    • The bg defender: Event board_games.0001
  • A game of Chess will begin immediately

  • If

    • The option “chess friendly” is chosen

    Then

    • 1 of 2 things will happen:
      • 50% – If … the wager:
        • You:
          • If played by the AI: Opinion: Pleased (+25)
          • Loses 10 Stress
        • The character you target:
          • If played by the AI: Opinion: Pleased (+10)
          • Gains 20 Stress
      • 50% – If … the wager:
        • The character you target:
          • If played by the AI: Opinion: Pleased (+25)
          • Loses 10 Stress
        • You:
          • If played by the AI: Opinion: Pleased (+10)
          • Gains 20 Stress

  • If

    • The option “chess prestige” is chosen

    Then

    • 1 of 2 things will happen:
      • 50% – If … the wager:
      • 50% – If … the wager:
        • The character you target: Gain +150 Prestige
        • You: … (more in the script below)
  • … (more in the script below)

If they refuse

  • Gains 20 Stress
  • The character you target: You gains the opinion “Unfriendly” (-20) of them

  • If

    • The character you target: Government is Clan
    • You: Government is Clan
    • The target’s house is your

    • If

      • You are not the target

      Then

      • The target is not you

    Then

    • The target’s house:
      • add_unity_value = { … }

    Else if

    • No
    • The character you target: Government is Clan
    • The target’s house: Has the target as house head

    • One of these

      • All of these

        • exists = scope:actor.house
        • The target’s house is not your

      • or

        You: Is Lowborn

    Then

    • The target’s house:
      • add_unity_value = { … }

Options when sending

  • Friendly Game
  • Wager Fame
  • Wager Fortune
  • Wager Land

Events it fires: board_games.0001

• the game's own tooltip text · ◦ our reading of the script line · code the script where neither exists

Who can use it and sees it (is_available, is_shown) (23 lines of game script)
is_available = OR = {
	has_perk = befriend_perk
	culture ?= {
		has_cultural_parameter = may_challenge_to_board_games
	}
	has_character_modifier = fp3_chess_playing_monkey_modifier
}
bg_can_start_board_game_trigger = yes
trigger_if = {
	limit = {
		is_ai = yes
	}
	OR = {
		has_perk = befriend_perk
		culture ?= {
			has_cultural_parameter = may_challenge_to_board_games
		}
	}
	is_imprisoned = no
}
is_shown = scope:actor = {
	this != scope:recipient
}

As written in game/common/character_interactions/03_fp2_interactions.txt.

Can be sent when (is_valid…) (25 lines of game script)
scope:actor = {
	is_available = yes
	can_start_board_game_eligibility_checks_trigger = yes
}
scope:recipient = {
	is_available = yes
	can_start_board_game_eligibility_checks_trigger = yes
}
scope:recipient = {
	custom_description = {
		text = fp2_bg_recipient_banned_from_board_games
		bg_can_start_board_game_is_scope_banned_checks_trigger = no
	}
}
trigger_if = {
	limit = {
		scope:actor = {
			has_government = landless_adventurer_government
		}
	}
	ep3_laamp_diplo_range_trigger = {
		TARGET = scope:recipient
		LAAMP = scope:actor
	}
}

As written in game/common/character_interactions/03_fp2_interactions.txt.

Effects (on_send, on_accept, on_decline) (232 lines of game script)
on_send = if = {
	limit = {
		always = scope:chess_land
	}
	challenge_to_2p_chess_interaction_lock_in_actor_stake_land_effect = yes
}
challenge_to_2p_chess_interaction_lock_in_game_type_effect = {
	GAME_TYPE_SETTER = scope:actor
}
on_accept = if = {
	limit = {
		always = scope:chess_gold
	}
	save_scope_value_as = {
		name = bg_stake_gold
		value = challenge_to_chess_gold_change_value
	}
}
if = {
	limit = {
		always = scope:chess_land
	}
	show_as_tooltip = {
		challenge_to_2p_chess_interaction_lock_in_actor_stake_land_effect = yes
	}
	scope:recipient = {
		save_temporary_scope_as = ordering_char_temp
		ordered_held_title = {
			limit = {
				bg_stake_land_valid_neighbouring_county_to_trade_trigger = {
					NEIGHBOUR = scope:actor
				}
			}
			order_by = bg_stake_land_evaluate_appropriate_county_ordering_value
			save_scope_as = bg_stake_land_recipient
			set_variable = wagered_county
		}
	}
}
scope:actor = {
	add_character_flag = taken_challenge_to_chess_interaction
	show_as_tooltip = {
		challenge_to_2p_chess_interaction_lock_in_game_type_effect = {
			GAME_TYPE_SETTER = scope:actor
		}
	}
	if = {
		limit = {
			scope:bg_interaction_game_type = flag:pachisi
		}
		configure_start_board_game_effect = {
			BG_INITIATOR = scope:actor
			BG_ATTACKER = scope:actor
			BG_DEFENDER = scope:recipient
			SYSTEM = pachisi
			LOCALE = random_nice_day
			OUTPUT_EVENT = perk_interaction.0121
			INVALIDATION_EVENT = board_games.0021
		}
	}
	if = {
		limit = {
			scope:bg_interaction_game_type = flag:hnefatafl
		}
		configure_start_board_game_effect = {
			BG_INITIATOR = scope:actor
			BG_ATTACKER = scope:actor
			BG_DEFENDER = scope:recipient
			SYSTEM = hnefatafl
			LOCALE = random_nice_day
			OUTPUT_EVENT = perk_interaction.0121
			INVALIDATION_EVENT = board_games.0021
		}
	}
	if = {
		limit = {
			scope:bg_interaction_game_type = flag:tabula
		}
		configure_start_board_game_effect = {
			BG_INITIATOR = scope:actor
			BG_ATTACKER = scope:actor
			BG_DEFENDER = scope:recipient
			SYSTEM = tabula
			LOCALE = random_nice_day
			OUTPUT_EVENT = perk_interaction.0121
			INVALIDATION_EVENT = board_games.0021
		}
	}
	if = {
		limit = {
			scope:bg_interaction_game_type = flag:go
		}
		configure_start_board_game_effect = {
			BG_INITIATOR = scope:actor
			BG_ATTACKER = scope:actor
			BG_DEFENDER = scope:recipient
			SYSTEM = go
			LOCALE = sitting_room
			OUTPUT_EVENT = perk_interaction.0121
			INVALIDATION_EVENT = board_games.0021
		}
	}
	if = {
		limit = {
			scope:bg_interaction_game_type = flag:fidchell
		}
		configure_start_board_game_effect = {
			BG_INITIATOR = scope:actor
			BG_ATTACKER = scope:actor
			BG_DEFENDER = scope:recipient
			SYSTEM = fidchell
			LOCALE = random_nice_day
			OUTPUT_EVENT = perk_interaction.0121
			INVALIDATION_EVENT = board_games.0021
		}
	}
	if = {
		limit = {
			scope:bg_interaction_game_type = flag:chess
		}
		configure_start_board_game_effect = {
			BG_INITIATOR = scope:actor
			BG_ATTACKER = scope:actor
			BG_DEFENDER = scope:recipient
			SYSTEM = chess
			LOCALE = random_nice_day
			OUTPUT_EVENT = perk_interaction.0121
			INVALIDATION_EVENT = board_games.0021
		}
	}
}
custom_tooltip = challenge_to_2p_chess_interaction.accept.game_commences.tt
if = {
	limit = {
		always = scope:chess_friendly
	}
	show_as_tooltip = {
		random_list = {
			50 = {
				show_chance = no
				desc = fp2_bg_interaction.winner.actor
				fp2_bg_stake_friendly_effect = {
					VICTOR = scope:actor
					LOSER = scope:recipient
				}
			}
			50 = {
				show_chance = no
				desc = fp2_bg_interaction.winner.recipient
				fp2_bg_stake_friendly_effect = {
					VICTOR = scope:recipient
					LOSER = scope:actor
				}
			}
		}
	}
}
if = {
	limit = {
		always = scope:chess_prestige
	}
	show_as_tooltip = {
		random_list = {
			50 = {
				show_chance = no
				desc = fp2_bg_interaction.winner.actor
				fp2_bg_stake_fame_effect = {
					VICTOR = scope:actor
					LOSER = scope:recipient
				}
			}
			50 = {
				show_chance = no
				desc = fp2_bg_interaction.winner.recipient
				fp2_bg_stake_fame_effect = {
					VICTOR = scope:recipient
					LOSER = scope:actor
				}
			}
		}
	}
}
if = {
	limit = {
		always = scope:chess_gold
	}
	show_as_tooltip = {
		random_list = {
			50 = {
				show_chance = no
				desc = fp2_bg_interaction.winner.actor
				fp2_bg_stake_fortune_effect = {
					VICTOR = scope:actor
					LOSER = scope:recipient
				}
			}
			50 = {
				show_chance = no
				desc = fp2_bg_interaction.winner.recipient
				fp2_bg_stake_fortune_effect = {
					VICTOR = scope:recipient
					LOSER = scope:actor
				}
			}
		}
	}
}
if = {
	limit = {
		always = scope:chess_land
	}
	show_as_tooltip = {
		random_list = {
			50 = {
				show_chance = no
				desc = fp2_bg_interaction.winner.actor
				fp2_bg_stake_titles_effect = {
					VICTOR = scope:actor
				}
			}
			50 = {
				show_chance = no
				desc = fp2_bg_interaction.winner.recipient
				fp2_bg_stake_titles_effect = {
					VICTOR = scope:recipient
				}
			}
		}
	}
}
add_clan_unity_intera
# … (cut here; the rest is in the file)

As written in game/common/character_interactions/03_fp2_interactions.txt.

Category
Friendly actions
Cooldown
1 year
Again on the same character
after 10 years
In the menu
under More…
ID
challenge_to_2p_chess_interaction

Source: game/common/character_interactions/03_fp2_interactions.txt and the English localisation, Crusader Kings III 1.20.1.2. “You” is the character who sends it (scope:actor, or a puppet acting for you); “the character you target” is the recipient.

Spotted a mistake on this page?