Re: [Bug-gnubg] Multi-bot rollouts of backgame position

[Joern Thyssen]

On Sun, Mar 09, 2003 at 07:53:06AM +1300, Joseph Heled wrote
> 
> I don't buy it.
> 
> If 2ply came out worse than 0ply I say:
>   Either
>     He is using the wrong filters for 2ply.
>     He is using the version before the rollout bug fix.
>     The dice was different for the rolls, with particularly bad dice 
> for the 2 ply.

Variance reduction should help eliminating that, but of course
variance reduction may be worthless if the 2-ply evaluation is very wrong,
I guess it depends on how good relative equities 2-ply give for this
position.

I wouldn't have chosen 32000 trials for the 0-ply, but rather something
proportional to 1296, say, 31104, in order to get the rotation of the
rolls. But I'm not sure how much it really matters. 

Jørn