Re: [Bug-gnubg] Some general rollout questions

[Joern Thyssen]

On Fri, Dec 13, 2002 at 12:03:09PM +0100, Morten Wang wrote
> Hi all,
> 
> Just two general questions about rollouts.  I did check #2 with the
> various resources on the web but couldn't find the answer.
> 
> 1: In a cubeful money game rollout of a position where the cube is
>    already turned (so Jacoby is irrelevant), does gnubg factor in
>    later cube usage in the total cubeful equity of the position?
>    I'd expect it to do so, but then I started wondering.

In the actual rollout the cube is fully live, so even with Jacoby, gnubg
will factor in the cube. However, if you use a truncated rollout, the
value of cube ownership at the truncation point is calculated through
the Janowski formulae like normal cubeful n-ply evalutions.

> 2: What are the differences between the text client and the GTK client
>    when it comes to doing rollouts?  In the GTK client I can evaluate
>    all moves on [0,4]-ply then roll out the best 5 and show the
>    results combined.  This doesn't seem to be possible in the text
>    client, or is it just hidden somewhere?

You can do rollouts with the CLI

hint
rollout =1 =2

but the result is not saved....

I'll see what I can do about it.

>    I have a remotely accessible server with two processors running
>    idle and I'd like to use it for larger rollouts, but the text
>    client seems difficult to use for that kind of thing.  Any advice
>    would of course be welcome.

Jørn