tournament_pivotal_duel_effect

tournament_pivotal_duel_effect = {
	save_scope_value_as = {
		name = no_change_chance
		value = $NO_CHANGE_CHANCE$
	}
	save_scope_as = contestant
	remove_character_flag = success_pivotal_flag
	remove_character_flag = neutral_pivotal_flag
	remove_character_flag = failure_pivotal_flag
	$DUELIST$ = { save_scope_as = duelist } # used if a proxy's skills are tested, e.g. a jockey
	scope:duelist = {
		duel = {
			skills = { $SKILL_1$ $SKILL_2$ }
			value = decent_skill_rating
			10 = {
				compare_modifier = {
					value = scope:duel_value
					multiplier = 3.5
					min = 5
				}
				tournament_horse_contest_trait_pivotal_modifier = yes
				tournament_foot_contest_trait_pivotal_modifier = yes
				tournament_wit_contest_trait_pivotal_modifier = yes
				tournament_bow_contest_trait_pivotal_modifier = yes
				scope:contestant = {
					activity_tournament_change_contestant_score_effect = { SCORE = increase_$INCREASE$ }
					add_character_flag = success_pivotal_flag
				}
			}
			10 = {
				trigger = { scope:no_change_chance = yes }
				scope:contestant = { add_character_flag = neutral_pivotal_flag }
			}
			10 = {
				compare_modifier = {
					value = scope:duel_value
					multiplier = -3.5
					min = 5
				}
				scope:contestant = {
					activity_tournament_change_contestant_score_effect = { SCORE = decrease_$DECREASE$ }
					add_character_flag = failure_pivotal_flag
				}
			}
		}
	}
}

As written in game/common/scripted_effects/04_dlc_ep2_tournament_effects.txt.