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Subject: Re: Maximum Number of Legal Moves

Author: Scott Gasch

Date: 22:18:20 05/08/05

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On May 08, 2005 at 23:44:31, Andrew Shapira wrote:

>What's best known (the smallest) upper bound on the number of legal moves, taken
>over all chess positions?  An obvious bound is 9*7*4+2*14+2*14+2*8+8 = 332.
>This comes from 9 queens, 2 rooks, 2 bishops, 2 knights, and 1 king.  Is a
>better bound known?

Somebody once posted this position which found its way into some of my move
generator test code.  I don't know if there positions with more possible legal
moves though.

[D]3Q4/1Q4Q1/4Q3/2Q4R/Q4Q2/3Q4/1Q4Rp/1K1BBNNk w - - 0 1

Scott



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