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Subject: Re: How many possible moves in one position?

Author: Jari Huikari

Date: 10:41:03 12/07/97

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On December 07, 1997 at 13:14:54, Don Dailey wrote:

>>Could you tell me what is the maximum number of legal moves in a
>>chess game position?
>>A) In theory?
>>B) In practice?


>I don't believe this is known.  It might be fun to make a contest
>out of this though.  Can somone post a position with a high number
>of legal moves?   And the rest of us will try to better this?

>The rules are:

>1)  Must be a fully legal position, (no more than 9 queens for
>instance.)
>2)  Post in FEN.

I think that some chess programmers must have thought this question some
time.

I remember a 'mate in one'-position having 175 or so legal moves. Over
100
of them were mates.

Perhaps someone has statistics from 'real' games. BTW: What's the
average
number of moves precisely? I know it's about 30, maybe a little more.
(In
middlegame anyhow.)
I already know, that minimum is zero (in mate or stalemate. :-)

(I _may_ have some use for these information in my new program.)

					Jari



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