I agree it's "correct". I don't get why gnubg didn't resign before 
doubling.

Pushing your logic further, gnubg should not resign after the double/take:
the opponent could resign next turn :) :) :)

MaX.

"Zulli, Louis P" <[email protected]> wrote on 10/04/2009 17:38:42:

> It is funny, but isn't it the "correct" play by X? If X doesn't 
> double, he is certain to lose the match. If X doubles and O passes 
> (not a likely response!) then X survives. So the "correct" play by X
> is to double, which O accepts. Now X has no way to avoid losing the 
> match, so X resigns. I guess the magnitude of the loss doesn't matter to 
X.
> 
> ----- Original Message -----
> From: "Massimiliano Maini" <[email protected]>
> To: [email protected]
> Sent: Friday, April 10, 2009 10:55:45 AM GMT -05:00 US/Canada Eastern
> Subject: [Bug-gnubg] Funny quirck 
> 
> 
> Hi all, 
> 
> enter this position: 2jbQIBjzAAAAAA:EQH7AEAAEAAA 
> 
>     GNU Backgammon  Position ID: 2jbQIBjzAAAAAA 
>                     Match ID   : EQH7AEAAEAAA 
>     +-1--2--3--4--5--6-------7--8--9-10-11-12-+  O: gnubg 
>  OO | O  X  O          |   | X              X |  4 points 
>  OO | O  X  O          |   |                X |  Rolled 66 
>  OO |       O          |   |                  | 
>  OO |       O          |   |                  | 
>   O |                  |   |                  | 
>     |                  |BAR|                  |^ 7 point match 
>     |                  |   |                  | 
>     |                  |   |                  | 
>     |                  |   |                  | 
>     |       X  X  X  X |   |                  | 
>     |    X  X  X  X  X |   |                X |  2 points 
>     +24-23-22-21-20-19------18-17-16-15-14-13-+  X: MaX (Cube: 2) 
> 
> 
> O takes 4 out and the position is gin given the cube and the score. 
> If you make gnubg play against himself, X will redouble to 4 
> (optional redouble), 
> O will take and then X will resign. Very funny :) :) 
> 
> MaX.
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