Re: [Bug-gnubg] miscellaneous bugs and suggestions

[Joern Thyssen]

On Fri, Sep 06, 2002 at 02:20:14AM +0200, Robert-Jan Veldhuizen wrote
> At 20:55 9/5/2002 +0000, you wrote:
> 
> >On Thu, Sep 05, 2002 at 04:18:20AM +0200, Robert-Jan Veldhuizen wrote
> >
> >> - how about extending "rollout cube decision" so that one can also just
> >> check the double decision (only upper rollout)
> >
> >The double decision requires both rollouts as well as the equity for
> >"double, pass".
> 
> You're right that often you need both values (and double,pass is just +1 
> EMG of course), but not always:
> 
> If it's a take, yes. But there's also doubling decisions where the pass 
> might be trivial (double/take equity >> 1), and the only question is 
> whether it's too good (no double eq > 1) or double/pass; then you're only 
> interested in the upper row of a cube decision rollout.
> 
> A bit similar to the scenario where the double is clear and you're only 
> interested in the take decision, and you only need the bottom row a cube 
> decision rollout.
> 
> Seems like an interesting option to me, since it can speed up such a 
> rollout by quite a lot I think. Especially when a position is close to "too 
> good", rolling out the sceanrio with opponent owning the cube could mean a 
> long game (recubes/passes seem unlikely here), and the result is often not 
> so interesting since it's clear that it's a big drop.

It's quite simple to add these rollouts, so I'll do so.

Jørn

PS! That's all from me today. I'm leaving for the Jean Michel Jarre
concert now :-) <URL:http://sites.tv2.dk/aerouk/>

-- 
Joern Thyssen, PhD
Vendsysselgade 3, 3., DK-9000 Aalborg, Denmark
+45 9813 2791 (private) / +45 2077 2689 (mobile) / +45 9633 7036 (work)