Re: [Bug-gnubg] Problem using command files for rollouts.

[Nis]

--On Wednesday, February 26, 2003 00:24 +0100 Jim Segrave 
<address@hidden> wrote:

> > I don't know if this is in the wishlist already: "Rollout until
> > certain".  This should probably be combined with a minimum and maximum
> > number of  trials.
>
> Would this be for a single rollout - where you'd say something like
> minimum 100, max 2592, stop if STD < 0.01 * abs(equity)?
>
> I would think this would be most useful when rolling out a set of
> moves to decide which is the best move. In this case, some real
> surgery is required, as you'd then want to stop when say x * JSD <
> abs(equity of best play - equity of 2nd best play).

I consider both of these useful. As you write yourself, the second option 
is the most obviously cool one. What is JSD, by the way?

> I have a feeling that this is what people would most often want. But
> that means being able to stop and restart rollouts, so you'd do
> something involving doing a block of rollouts of each candidate play,
> eliminate any whose equity difference from the best so far is more
> than x JSDs from the best play. Then do another block of rollouts of
> the remaining candidates, continuing until either you've reached the
> limit of rollouts or ou've eliminated all but one play. This requires
> the ability to resume rollouts (which I'm working towards) and a
> better view of what moves to roll out.

There is one small complication: What if the top candidate drops in equity 
when the rollout is extended, causing a previously dropped move to be 
within range? Should we then resume the rollout of this move also?

> At the moment, you can use the
> hint or analysis window to get a list of moves, then select a block of
> those (I don't think you can select non-adjacent ones for a single
> rollout).

Ctrl-click to select/deselect individual moves works in the Windows version.

> After that the current code is very simple minded - roll
> each selected move out to the limit.

Yes - and option 1 above would not be very hard to implement either - it 
"just" needs a new break-condition after each trial.

--
Nis Jorgensen
Greenpeace
Amsterdam