RE: [Bug-gnubg] Predefined move filters

[Ian Shaw]

> 
> On Wed, Jan 01, 2003 at 08:18:46AM +1300, Joseph Heled wrote:
> > I cant see how such a tiny number (1296) can give any 
> indication, unless 
> > the difference is huge, which I don't think is the case,
> 
> I agree; I just suggested 1296 trials to start with for a 
> sanity check.
> 
> > and of course 
> > you can't use any form of variance reduction, since those 
> depend again 
> > on which ply you believe in.
> 
> The ply at which variance reduction is performed will affect only the
> rate of variance reduction, not the end result.  Variance reduction at
> any ply is very helpful, and depending on the other settings, 
> generally
> saves at least an order of magnitude of trials.
> 
> > For 2 close players (like for a net and a contender) I see 
> I need at 
> > least 50,000 money games to give a consistent answer - and 
> that ONLY 
> > WHEN I run with "run games in pairs, alternating the the same dice 
> > sequence" option, which reduces a lot of the dice noise.
> 
> Yes, I think this is helpful (which is why I suggested setting the
> seed, so the dice will be matched).
> 
> Cheers,
> Gary.
> -- 
>    Gary Wong           address@hidden           
http://www.cs.arizona.edu/~gary/


I get the same result both ways round. Am I doing something wrong?

set rollout trials 1296
set rollout truncation plies 0
set rollout varredn on
set rollout quasirandom on
set rollout cubeful off
set rollout initial on
set rollout seed 0
set rollout player 0 chequerplay plies 0
set rollout player 1 chequerplay plies 1
set rollout player 1 movefilter 1 0 8 8 0.2
new session
new game
set board 4HPwATDgc/ABMA
rollout

# 0.5122        0.1417  0.0073  0.1231  0.0055  +0.0449 n/a
# 0.0218        0.0067  0.0010  0.0067  0.0008  0.0508  n/a

set rollout seed 0
set rollout player 1 chequerplay plies 0
set rollout player 0 chequerplay plies 1
set rollout player 0 movefilter 1 0 8 8 0.2
new game
set board 4HPwATDgc/ABMA
rollout

# 0.5122        0.1417  0.0073  0.1231  0.0055  +0.0449 n/a
# 0.0218        0.0067  0.0010  0.0067  0.0008  0.0508  n/a

--Ian