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Re: [Bug-gnubg] Strange cubeless rollout result?
From: |
Joern Thyssen |
Subject: |
Re: [Bug-gnubg] Strange cubeless rollout result? |
Date: |
Wed, 8 Jan 2003 10:20:29 +0000 |
User-agent: |
Mutt/1.4i |
On Wed, Jan 08, 2003 at 03:32:46AM -0500, address@hidden wrote
> Hi
> I set up the following position and wanted to roll it out CUBELESS.
>
> Position ID vHsXAADCNhQCNw
> Match ID MAEAAAAAAAAA
>
> So I selected:
> Settings---Options---uncheck "use doubling cube"
> However I *forgot* to uncheck "use Jacoby rule"
>
> First question:
>
> If I'm doing a cubeless rollout, then I want G and B to count, so why do I
> still need to uncheck "use Jacoby rule" ?
Because gnubg *always* does rollouts "according to score" (he he, unlike
snowie4 that never does that). That is, it uses the gammon price based
on the current score and cube value. I can see this is confusing for
money game.
So a cubeless moneygame rollout with Jacoby rule is equivalent to a
rollout for a 1-pt match. I'll consider changing this :-)
> Compared to the other three Bots GNU didn't do so well at 0-ply.
Gary is trying to hunt down a possible bug in the rollout code.
> The thing that did appear strange was the BG figure.
>
> GNU(24.6) SW3.2(13.0) JF(13.6) SW4(12.8).
because gammons and backgammons don't count, gnubg won't try to save
gammon and backgammon, for example:
GNU Backgammon Position ID: AgAA7LYdAIAAAA
Match ID : cIkKAAAAAAAA
+13-14-15-16-17-18------19-20-21-22-23-24-+ O: gnubg
| | | O X | OOO 0 points
| | | | OOO
| | | | OOO
| | | | OOO
| | | | OO
v| |BAR| | (Cube: 1)
| | | |
| | | |
| | | X X |
| | | X X X X X X | Rolled 52
| | | X X X X X X | 0 points
+12-11-10--9--8--7-------6--5--4--3--2--1-+ X: jth
1. Cubeful 0-ply 24/19 6/4 Eq.: -1,000
0,000 0,000 0,000 - 1,000 1,000 1,000
0-ply cubeful [expert]
2. Cubeful 0-ply 24/19 5/3 Eq.: -1,000 ( +0,000)
0,000 0,000 0,000 - 1,000 1,000 1,000
0-ply cubeful [expert]
3. Cubeful 0-ply 24/19 4/2 Eq.: -1,000 ( +0,000)
0,000 0,000 0,000 - 1,000 1,000 1,000
0-ply cubeful [expert]
4. Cubeful 0-ply 6/1 3/1 Eq.: -1,000 ( +0,000)
0,000 0,000 0,000 - 1,000 1,000 0,981
0-ply cubeful [expert]
Jørn