Re: [Bug-gnubg] 1-chequer hypergammon

[Joern Thyssen]

On Thu, Apr 10, 2003 at 09:29:52AM -0700, Ned Cross wrote
> Hmm, I've never played 1-checker hyper, but it seems to me gammons would
> always be equal to wins for both sides by definition.  So the cube would
> seem to be an attempt to activate gammons that would be lost over the next
> exchange in favarable scenarios for X.  I am not sure about the beaver.
> 
> That either side has a nonzero probability of winning backgammon is simply
> wrong, since contact is broken and both sides have cleared the enemy home
> board. Removing the BG probabilities should slightly alter the equities.

There is contact! So "double, beaver" due to the Jacoby rule. 

 GNU Backgammon  Position ID: AAIAAAAIAAAAAA
                 Match ID   : MBkAAIAAKAAA
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     O: gnubg
 |                  |   |                  |     8 points
 |                  |   |                  |
 |                  |   |                  |
 |                  |   |                  |
 |                  |   |                  |
^|                  |BAR|                  |
 |                  |   |                  |
 |                  |   |                  |
 |                  |   |                  |
 |                  |   |                  |     Cube offered at 2
 |       X        O |   |                  |     5 points
 +13-14-15-16-17-18------19-20-21-22-23-24-+     X: jth
Pip counts: O 18, X 10



Jørn