by the number of possible chess moves. Chess is a pretty intricate game! No computer is ever going to calculate the entire tree. What a chess computer tries to do is generate the board-position tree five or 10 or 20 moves into the future. Assuming that there are about 20 possible moves for any board position, a five-level tree contains 3,200,000 board positions. A 10-level tree contains about 10,000,000,000,000 (10 trillion) San Juan faster web connection, San Juan, PR web connection faster San JuanSan Juan web connection, faster Puerto Rico, San Juan faster web connection
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