Computer Chess Club Archives




Subject: Re: Maximum Number of Legal Moves

Author: Andrew Shapira

Date: 16:34:32 05/09/05

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It is wrong to assume that everyone does things the same way.  My engine
generates only legal moves.  (It is not slow - it enumerates perft(7) =
3,195,901,860 in about 265 seconds on an Athlon 1900+ [12 million perft numbers
per second, or about one every 160 pseudocycles].)

On May 09, 2005 at 10:55:52, Vincent Diepeveen wrote:
>Instead of asking the maximum number of legal moves, you should be more
>concerned however with the number of semi-legal moves as they can happen in your
>engine. As we already know the maximum number of moves are in positions with a
>king in the corner, Obviously the theoretic limit for that is 225 moves.

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