[Computer-go] Playouts vs playingstrength

Detlef Schmicker ds2 at physik.de
Sat Nov 23 02:32:49 PST 2013


Just to let you know:

I did a comparison of the playings strength vs. playouts.

This time I used 4 times the oakfoam playouts for pachi
(eg. 1000 for oakfoam 4000 for pachi)

The graph shows how bad we become (in comparison) with more playouts:(.
>From the games the first impression is, that the joseki becomes worse
with more playouts e.g.

http://www.physik.de/playouts2.pdf
The plot is 1050 games fitted with a 5th order polynome. The borders of
the plot are not statistical significant!

Thanks for every hint :)

Detlef


Am Montag, den 18.11.2013, 22:45 +0100 schrieb Detlef Schmicker:
> Am Montag, den 18.11.2013, 21:11 +0100 schrieb Petr Baudis:
> > On Sun, Nov 17, 2013 at 03:11:22PM +0100, Erik van der Werf wrote:
> > > make sure Pachi isn't doing any kind of pondering in the
> > > background.
> > 
> >   Indeed, Pachi will ponder by default. Turn pondering off by passing
> > 
> > 	pondering=0
> > 
> > on the commandline.
> 
> Thanks a lot for the hint!!! From the command line documentation I
> thought pondering is off by default.and I did not check it:(
> 
> 
> > 
> > > pachi -d 0 -t =4000 -r chinese threads=1,max_tree_size=2048
> > 
> >   Also, it may be worth passing pass_all_alive unless you are doing a
> > sophisticated scoring procedure, to make sure Pachi captures all dead
> > groups at the end of the game.
> > 
> >   P.S.: Do your results imply that on 4000 playouts/move, oakfoam is
> > quite stronger than Pachi now? I'd love to hear more. :) How does the
> > playout speed compare?
> 
> Yes, we play even with 1000 against this settings. But I did not take
> pondering into account, as I thought it is turned off. Therefore I do
> not know if pachi really played 4000 playouts, as I thought.
> 
> We have a little less than 1000 playouts/core/second. And my main aim is
> to get the iPad version strong, therefore the strength with lower
> playouts is more important to me.
> 
> I did not optimize parameter against pachi alown, I started running clop
> with three opponents gnugo level 10, pachi with this setting and 
> 
> /home/detlef/fuego-1.1/fuegomain/fuego
> 
> with setting
> uct_param_player ignore_clock 1
> uct_param_player max_games 3000
> uct_param_player resign_min_games 5000
> uct_max_memory 300000000
> 
> All 4 programs have comparable strenght than.
> 
> Always happy to share any idea:)
> 
> Detlef
> 
> 
> > 
> 
> 
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