Abstract
The distinction between games of chance and games of skill is not well-defined at present. We introduce the concept of chanciness for non-deterministic two-player zero-sum games with sequential moves and perfect information. Chanciness quantifies how strongly a game is influenced by chance events. We demonstrate that the relative influence of chance on game outcomes varies with the skill of the playing agents. Therefore, we assign a chanciness value to the combination of a game and a specific set of players. The effective computability of chanciness is demonstrated for exemplary games.
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