Game concept
Board Game Type
The game also links it as Board Game Types, counter, counters.
From the game's encyclopedia
When playing a Board Game, different play styles counter your opponent. Countering their moves severely reduces the points they gain from them, even if successful. Skilled opponents may note your own skills and deliberately attempt to counter you.
Available games are:
• Chess
• Pachisi
• Tabula
• Go
• Fidchell
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.
Board Game Type is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "When playing a Board Game, different play styles counter your opponent." It is part of Match. The game also links it as Board Game Types, counter and counters. 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.