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Subject: Re: Unique nodes, en passant and perfect hashing

Author: Dave Gomboc

Date: 07:19:47 11/25/99

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On November 25, 1999 at 10:11:58, Ulrich Tuerke wrote:

>I find your results very interesting.
>
>What puzzles me, is the large branching ratio from one iteration to the next one
>which you obtained. I'd thought, that you get a factor of 4 to 5, provided you
>have a resonable move ordering, whereas you have factor of ~20. Could it be that
>your move ordering is very poor ?
>
>I assume, with an improved move ordering, the effects, which you have observed,
>will also become less drastic.
>
>Nevertheless, it might be worthwhile to try your suggestion regarding en
>passant.
>
>Thanks,
>Uli

I think he was counting nodes for a complete traversal (minimax).  For instance,
the leftmost column of the third table goes 1 node, 21 nodes, 421 nodes, ...

Dave



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