GNU Backgammon

Forum Archive : GNU Backgammon

Saving rollout results from command-line interface

From:   Jeremy Bagai
Date:   24 April 2006
Subject:   Saving gnu rollout results from CLI
Forum:   GammOnLine

I'm importing many positions from a command-line text file.
I can evaluate them all, and save the evals to a single output text

But I can't seem to get any rollout results. I've tried exporting each
position to a separate text file, but I end up with no rollout results
after each exported position.


Ian Shaw  writes:

Here is what I do.

    rollout =1
    export position html ".\FreeDrop\DMP61a_66.htm"
    rollout =2
    export position html ".\FreeDrop\DMP61a_66.htm"

This rolls out the top play (found by whichever "evaluation" settings
you use), saves the result (in case the computer crashes), then rolls
out the second best play and saves the results again.

If you want to roll out the plays in parallel as you would from the gui,
then the command is "rollout =1 =2 =3", although I'm unsure whether you
need the "=" sign each time.

You have to set confirm save off to avoid being prompted to overwrite
the already created file.

You can also use the command "save game filename.sgf" to save a match in
gnubg format.

Jeremy Bagai  writes:

Thanks, Ian. I can get that to work for checker plays.
Can you give me a sample for a cube-action rollout? I'm frustrated in
that I can't find the analogous commands. (I can see that the CLI is
doing a cube-action rollout, but I'm unable to export those results in
the same manner.)   Here's what's not working for me:

    set matchid cAngAAAAAAAA
    export position text c:\batch\output\rollresults1.txt

Ian Shaw  writes:

There are two things wrong.

Firstly, the correct command is "rollout =cube". Simply using "rollout"
gives a rollout of the position only, not the doubling decision.

Secondly, I have only got the cube export to work by actually playing a
move after the roll. The rollout then appears in the text file. I
suspect that gnubg does not create a move record in the analysis until
the chequers are played. This is not very satisfactory; I'll post a bug
report on the developers' forum.  This works for me:

    rollout =cube
    move 13/7 8/7 (or whatever, the word "move" is optional)
    export match text filename

I've tried to find a way to play the move automatically, but failed. I
think you will have to enter a valid roll & move after the cube action.
You might find it useful to use "set rng manual" (at the top of the
script), and then use "set dice n n" instead of "roll".

Ian Shaw  writes:

I've worked out how not to have to play the next move.

    set player 0 human
    set player 1 human
    rollout =cube
    export game text filename.txt

A final point. If you use "export position", I think only the position
is exported, with no analysis. Use "export game" or "export match",
(I've experienced crashes with "export session").

Christain Anthon  writes:

This should work as well I think

    set player 0 human
    set player 1 human
    rollout =cube
    export position text filename.txt
Did you find the information in this article useful?          

Do you have any comments you'd like to add?     


GNU Backgammon

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How luck factor is calculated  (Gregg Cattanach, Aug 2002) 
How rollouts work  (Gary Wong, July 1999) 
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Importing PartyGammon matches  (rew+, July 2006) 
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JSD's and confidence intervals  (Daniel Murphy+, Jan 2005) 
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Restarting a rollout with different settings  (Robert-Jan Veldhuizen, Apr 2004)  [GammOnLine forum]
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Rollout settings  (Robert-Jan Veldhuizen, Mar 2004)  [GammOnLine forum]
Rollout settings  (Ian Dunstan, Aug 2003)  [GammOnLine forum]
Rollout settings for the impatient  (Robert-Jan Veldhuizen, June 2004)  [GammOnLine forum]
Running rollouts in background  (Bruce+, Apr 2004)  [GammOnLine forum]
Saving rollout results from command-line interface  (Jeremy Bagai+, Apr 2006)  [GammOnLine forum]
Saving rollouts  (Mislav Radica+, May 2006)  [GammOnLine forum]
Setting GnuBG's playing strength  (JP White, Sept 2001) 
Setting skill level  (Jim Segrave, Apr 2004) 
Setting up and saving a rollout  (Albert Silver, Dec 2003)  [GammOnLine forum]
What's GNU?  (Gary Wong, Oct 2001) 
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