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Subject: Re: perfect ordering

Author: David Hanley

Date: 11:32:11 01/09/02

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On January 09, 2002 at 13:55:45, Gian-Carlo Pascutto wrote:

>no hashing or pruning with perfect ordering can be described by
>
>bf = branching factor = 38
>
>nodes = (bf)^ceil(depth/2) + (bf)^floor(depth/2) - 1
>
>for an 8 ply search, that is 4 170 271 nodes


I think that's it.  I just wrote a little alphabeta that plays a game for which
i can always generate a perfectly ordered move list, and here was my result:

"A search of depth 8 took 2310547 nodes and 4170271 evals"

Hmmm..  This kind of screws up a clever algorithmic idea i had.

On the other hand, with no alphabeta, it searches 4,347,792,138,496 nodes.

dave



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