Editing Strategy (game theory) (section)

===Choosing a strategy set===
In applied game theory, the definition of the strategy sets is an important part of the art of making a game simultaneously solvable and meaningful. The game theorist can use knowledge of the overall problem, that is the friction between two or more players, to limit the strategy spaces, and ease the solution.

For instance, strictly speaking in the Ultimatum game a player can have strategies such as: ''Reject offers of ($1, $3, $5, ..., $19), accept offers of ($0, $2, $4, ..., $20)''. Including all such strategies makes for a very large strategy space and a somewhat difficult problem. A game theorist might instead believe they can limit the strategy set to: {Reject any offer ≤ ''x'', accept any offer > ''x''; for ''x'' in ($0, $1, $2, ..., $20)}.