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Recall what we previously learned. a . What s the difference between a world state, a state description? b . Why is this distinction between
Recall what we previously learned.
a Whats the difference between a world state, a state description?
b Why is this distinction between world state and state description useful?
c What is a search node?
d Why is this distinction between search node and states useful?
Consider the problem of solving two puzzles, you move one tile of any one puzzle each time.
a If your goal is solving both two puzzles, give a complete problem formulation includes state,
action, initial state, successor function, Goal state test, and path cost.
b How large is the reachable state space? Give an exact numerical expression. Note: only half of
all impossible states are reachable.
c Suppose we MODIFY the problem and the game become an adversarial game as follows: the
two players take turns moving; a coin is flipped to determine the puzzle on which to make a
move in that turn; and the winner is the first to solve just ONE puzzle. Which algorithm can be
used to choose a move in this setting?
d Assume two players playing that game following c after N turns, one of the puzzle now require
only one move to be completely solved. Who has better chance to win? The player just finished
the move in the Nth turn or the player is going to make a move in the coming turn N Why?
e Someone will eventually win if both play perfectly. Is that true? Explain why.
Which of the following are true and which are false? Give brief explanations.
a In a fully observable, turntaking, zerosum game between two perfectly rational players, it does not
help the first player to know what strategy the second player is usingthat is what move the second
player will make, given the first players move.
b In a partially observable, turntaking, zerosum game between two perfectly rational players, it does
not help the first player to know what move the second player will make, given the first players move.
c A perfectly rational backgammon agent never loses.
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