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

Author: Enrique Irazoqui

Date: 13:14:24 12/07/97

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On December 07, 1997 at 15:16:51, Don Dailey wrote:

>>Q6Q/4Q3/1Q6/5Q2/2Q5/R5Q1/3Q2NN/1R3KBk w - -    ; 195 moves.
>>
>>I'm sure is improvable.
>>
>>Enrique
>
>Is this the 8 queens idea with some mods to make it legal?
>Nicely done!  Can we get past 200?  How did you count them?

With Fritz 5. Funny that Hiarcs doesn' accept it and Mchess 7 declares
stalemate after computing 100 moves.

>I'll post the best position my program comes up with by searching
>from normal positions.  Since my last post it has found a 68 legal
>move position, but I think it will do better.
>
>Pehaps another useful thing would be to consider only positions  that
>are a  subset of the opening position.  In other words, only 1 queen
>allowed, 2 rooks etc.  We could define these as "normal" positions and
>constructions like yours as "constructed" positions.   It will be
>interesting to see if we can get past 200 with constucted positions (I
>believe we can) and past 100 with normal positions (probably can too.)

Q6Q/4Q3/1Q6/5Q2/2Q5/R5Q1/3Q2NN/1R1B1KBk w - -    ; 199 legal moves.

This is 199 moves, but not 200. :(

Enrique

>Don



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