Re: [Bug-gnubg] Optional redouble, or is it automatic

[Joern Thyssen]

On Mon, Sep 09, 2002 at 02:20:20PM +0100, Ian Shaw wrote
> 
> The correct position is this:
>  
>    +-1--2--3--4--5--6-------7--8--9-10-11-12-+   O: ian
>     |    X  O  O  O  O |   | O  O     O       |  2 points
>     |    X  O  O     O |   | O  O             |  
>     |    X             |   |                  |  
>     |                  |   |                  |  
>     |                  |   |                  |  
>     |                  |BAR|                  |^ 5 point match
>     |                  |   |                  |  
>     |                  |   |                  |  
>     |             X    |   |                  |  
>     |    O  X  X  X  X | X |                  |  On roll
>     | X  O  X  X  X  X | X |                O |  0 points
>     +24-23-22-21-20-19------18-17-16-15-14-13-+  X: mlp (Cube: 4)
> 
> Reconsidering my original reason for posting, Os takepoint is at 75% (W-H
> MET) because he can drop to Crawford 3-away. Nis is correct to argue that X
> might drop incorrectly in future so holding on to the cube is OK. I'm not
> sure that a bot sees this though since it assumes correct play by both
> sides. 
> In that case the only drops you get are correct drops because O has
> lost his market, and therefore O wishes he had doubled earlier.

Yes, but gnubg does see any market losing sequences on 2-ply. Even
after X's joker 55 the game is still fifty-fifty.

I suggest you do a 4-ply cube evaluation, this should give you 2-ply
evaluations on X's next roll. A 2-ply eval only gives 0-ply evaluation of
possible market losers.

Jørn

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