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RE: [Bug-gnubg] 13 point one sided race database
From: |
Ian Shaw |
Subject: |
RE: [Bug-gnubg] 13 point one sided race database |
Date: |
Fri, 16 Jun 2006 09:17:22 +0100 |
> From: Hugh Sconyers on 15 June 2006 17:33
>
> i have been using the 13 point one sided race database.
> Øystein Johansen has answered many of my question about the database.
>
> suppose both players are 'in the database'. it seems that
> there is nothing to gained by doing anything except testing
> all the legal moves for the best
> move. if you have your settings set to a higher ply gnubg
> takes a long
> time to find the best move. is it possible to add code to
> gnubg so that when you are using this database and a higher
> ply setting that gnubg will stop at 0 ply in playing and rollouts?
>
I think this has not been done because it is occasionally possible for the best
play to vary if you look ahead to cube actions.
I don't know how often this comes up in actual play, and I agree that it
consumes a lot of time for little reward.
These errors are likely to be small and, in rollouts, have very little effect
on the overall outcome, so I think it makes sense to truncate at 0-ply during
rollouts.
For head to head play, I think you would generally want to get the most
accurate play possible. If you are prepared to play 2-ply for the rest of the
game, I expect most people would want 2-ply at this stage.
Just my $0.02.
-- Ian