Computer Chess Club Archives




Subject: Re: A move to search 2nd... Keep in the trans table?

Author: Robert Hyatt

Date: 07:39:41 07/22/04

Go up one level in this thread

On July 22, 2004 at 06:06:15, Tord Romstad wrote:

>On July 21, 2004 at 22:09:58, Robert Hyatt wrote:
>>Nobody uses the transposition table to order the moves at ply=1.
>I do.  I agree that it might not be optimal, but it always seemed too messy
>and complicated to me to have a separate search function at the root level.
>The main search() function is called directly from the iterative deepening
>loop, and the same move ordering is used at the root as at all other nodes
>far from the leaves.

I'll ask again.  _how_ can you use the transposition table to order moves at the
root position?  That is a single position.  How many "best" moves can you store
in a single transposition position and how do you sort them to figure out which
is best, second best, third best, etc...

You don't have to have a separate search for ply=1 if you don't want to, while
still treating ply 1 differently as I do...

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