In this tree, white can make three possible moves. From each of those three possible moves, black can make three possible moves. From each of those nine board positions, white can make two possible moves. (In real life, the total number of moves from any position is 20 or so, but that would be hard to draw.) To decide what to do, the computer looks at this tree and works upward Butler dialup access, Butler, NJ access dialup ButlerButler access, dialup New Jersey, Butler dialup access
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