Formula game
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A formula game is an artificial game represented by a fully quantified Boolean formula. Players' turns alternate and the space of possible moves is denoted by bound variables. If a variable is universally quantified, the formula following it has the same truth value as the formula beginning with the universal quantifier regardless of the move taken. If a variable is existentially quantified, the formula following it has the same truth value as the formula beginning with the existential quantifier for at least one move available at the turn. Turns alternate, and a player loses if he cannot move at his turn. In computational complexity theory, the language FORMULA-GAME is defined as all formulas Φ such that Player 1 has a winning strategy in the game represented by Φ. FORMULA-GAME is PSPACE-complete.
[edit] References
Sipser, Michael. (2006). Introduction to the Theory of Computation. Boston: Thomson Course Technology.
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