[Bug-gnubg] Bearoff bug?

[Achim Mueller]

Hi folks,

can someone check the attached file please?

The story: I was playing around a little bit with basic bearoffs and
made a session of 2roll - 5roll (cube in the middle/player owns cube). 

1.After analysing the session, gnubg incorrectly gives 5 errors in the
session statitistics (3 missed doubles in game 1, 3 missed doubles in
game 2) and doesn't annotate the second game with questionmarks.

2.     GNU Backgammon  Position ID: 3wEAAL4DAAAAAA
                    Match ID   : UQkFAAAACAAA
    +24-23-22-21-20-19------18-17-16-15-14-13-+  O: gnubg
 OO | O  O             |   |                  |  0 points
 OO | O  O             |   |                  |  
  O | O  O             |   |                  |  
  O | O                |   |                  |  
  O | O                |   |                  |  
    |                  |BAR|                  |v 
  X | X                |   |                  |  
  X | X                |   |                  |  
  X | X  X             |   |                  |  
 XX | X  X             |   |                  |  Rolled 21
 XX | X  X             |   |                  |  1 point
    +-1--2--3--4--5--6-------7--8--9-10-11-12-+  X: ace (Cube: 2)


Cube analysis
2-ply cubeless equity  +0.494
  0.747 0.000 0.000 - 0.253 0.000 0.000
Cubeful equities:
1. No double            +0.915
2. Double, pass         +1.000  ( +0.085)
3. Double, take         +0.915  ( +0.000)
Proper cube action: Optional redouble, take
                    ^^^^^^^^

I didn't play bg for a year now, but did I miss some new overwhelming
theory? Years ago I learned this is a (re-)double/take, but not
optional.

Ciao

Achim

PS. I'm using the default bearoff databases (put into
$INSTALL/share/gnubg.




-- 
achim mueller, anne-frank-str. 25, D-48431 rheine
+49 (0)5971 83767, +49 (0)163 8458340
-------------------------------------------------
pgp/gnupg key: 1024D/5DF3A722 (wwwkeys.de.pgp.net)

Bearoff_basic_01.sgf
Description: Text document