[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Bug-gnubg] Rollout problems
From: |
Jim Segrave |
Subject: |
Re: [Bug-gnubg] Rollout problems |
Date: |
Thu, 5 Dec 2002 00:22:51 +0100 |
User-agent: |
Mutt/1.2.5.1i |
On Wed 04 Dec 2002 (19:50 +0100), Magnar Naustdalslid wrote:
> Thanks for nice new rollout features. I have encountered a couple of
> problems:
>
> Problem 1:
> Rollouts with separate evaluation for deeper plies are too slow. For
> example, try the following: First, roll out the initial position untruncated,
> expert level, 0-ply, 10 trials. This takes a few seconds. Second, roll out
> the initial position at reduced 2-ply, medium search space, truncated at
> one ply, 10 trials. This also takes a few seconds. Third, try to *combine*
> these settings by evaluating the first move at reduced 2-ply, medium
> search space and the rest of the moves at 0-ply expert. Strangely, this is
> very slow.
I just ran some tests with a random saved game file. I set the rng
seed to 0 for each trial (and each was done starting gnubg up again,
so no cached analsis would be available.
First, 4 untrucated 2 ply reduced rollouts from the initial roll
3m 51 sec = 57 seconds/game
Switching to 0 ply evaluation after the first move:
1m 41 sec = 26 seconds/game
Switching to 0 ply evaluation after the fifth move:
1m 53 sec = 28 sec/game
Everything at 0 ply
5 sec = 1.25 sec/game
> Problem 2:
> GNUbg crashes when I try to run a rollout with reduced 2-ply, small
> search space.
Yes - there was a bug. A fix was committed Tues 3 Dec.
--
Jim Segrave address@hidden