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 God and the Devil (Posted on 2005-02-08)
God and the Devil decide to play a game. God will start by picking an infinite sequence of moves of the form "left", "right", "up", and "down". The Devil responds by creating a finite maze with an exit and by placing God somewhere inside. God then follows His pre-selected sequence to traverse the maze. Unmakable moves are ignored; for example, if the next move is "left" and there is a wall to the left of the current square, God goes on to the next move in the sequence without moving.

If God escapes the maze in finite time, He wins. Otherwise, the Devil wins.

Assuming both agents act optimally, who will win?

(assume that the maze is formed by deleting some edges from a rectangular grid, and that it has no isolated regions; i.e., it is always possible to get to the exit from any point inside the maze)

 See The Solution Submitted by David Shin Rating: 3.6842 (19 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
 re(3): \$ 20 on the Devil | Comment 42 of 62 |
(In reply to re(2): \$ 20 on the Devil by Galvanic-Ray)

Actually, it does say so.  And even though you could argue it might be vague, the author of the puzzle wrote this comment: re(5): Solution attempt - Jack was right, saying the devil gets to look first.

 Posted by Dustin on 2005-02-12 05:54:34

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