Game concept
Match
The game also links it as Board Game, Board Games, Game.
From the game's encyclopedia
A board game consists of two players trying their luck and skill against one another in a game of wits and chance. They may be played as friendly matches, or with a wager of some kind.
There are many different Board Game Types, though the ways to Win and play each remain the same. Only the skills used differ.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Match is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "A board game consists of two players trying their luck and skill against one another in a game of wits and chance." It covers Winning, Board Game Type, Chess, Pachisi, Hnefatafl and 3 more. The game also links it as Board Game, Board Games and Game. Patch 1.20.1.2, from game/common/game_concepts/00_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/00_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.