The board-game reality, in which the only things that exist are those defined for the game and allowed by its rules, is like a complete formal system.
All possible outcomes derive purely and simply from the rules and initial starting positions.
What can be experienced within this system is coextensive with the game-world it defines. The question of a real world beyond its limit is undecidable. The impossibility of transcending this game-world from within is what closes it upon itself. The meta-viewpoint of a player, in contrast to that of the playing piece, is able to represent the game in the larger context of the real world. This is not simply a matter of physical perspective, but of a more inclusive set of definitions, embracing a larger and more complex reality within which the game-world is situated as a subset.