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Re: [Bug-gnubg] idea for faster rollout cube decision


From: Robert-Jan Veldhuizen
Subject: Re: [Bug-gnubg] idea for faster rollout cube decision
Date: Mon, 04 Aug 2003 00:12:42 +0200

At 16:30 8/3/2003 +0000, you wrote:
On Sun, Aug 03, 2003 at 03:12:24PM +0200, Jim Segrave wrote
> On Sun 03 Aug 2003 (01:39 +0200), Robert-Jan Veldhuizen wrote:
> > Quite often I find myself rolling out a cube decision where I'm only
> > interested in one of the two rows of results. Sometimes the double is clear
> > and it's just the take decision I'm interested in (bottom row). At other
> > times it's a trivial pass but might be too good and I'm only interested in
> > the No Double equity (top row).
> >
> > It would be nice to have a feature to just do either of the two rollouts
> > peformed by a rollout cube decision. In the Annotation window, I could
> > imagine a button for "rollout no double only" for the doubler's turn, and
> > if there's an actual double, a button for "rollout double/take only" for
> > the taker/passer's turn.
> >
> > Especially for close too good decisions (but huge passes) this would gain a
> > lot of time (more than a factor 2 even) as they'll often be passed later
> > anyway, sometimes right on the next turn. Right now though the rollout
> > would spend a lot of time with the cube being taken and the game being
> > played until the end or until the very unlikely recube/drop.
>
> That sounds reasonable to me. Previously that wasn't an option, as
> cube decisions were done with ND/DT at the lowest level - there was no
> way to say just roll out this half of the decision.

The problem is that we need the DT equity for the output...

Jørn

Wouldn't it be possible to just use the "old" DT equity (from an evaluation or earlier rollout) and let this "half" rollout just update the ND equity? And v.v. for rolling out DT only and keeping the old ND equity?



--
Robert-Jan (Zorba on FIBS)




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