RE: [Bug-gnubg] Bug?

[Albert Silver]

Yes, I confirmed this error. The double/pass is correct, as are the winning chances for boths sides, however the cubeless equity should be over 0.600. Weird. 3-ply is no better.

 

                                                                                                            Albert

 

 

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of address@hidden
Sent: Thursday, October 17, 2002 12:01 PM
To: address@hidden
Subject: [Bug-gnubg] Bug?

 

Hi
How can the cubeless equity of this position be 0.211
And the cubeful equities be 0.896/1.182 Double/Pass?

Thanks

GNU World Class (O, 0 pts) vs. Midas (X, 0 pts) (money game)

Game number 1

Move number -1: X on roll, cube decision?

   GNU Backgammon  Position ID: tC0AwDvcvRsAAA
                   Match ID   : cAkAAAAAAAAA
   +24-23-22-21-20-19------18-17-16-15-14-13-+  O: GNU World Class
   |       O  O  O  O |   | O                |  0 points
   |          O  O  O |   |                  |  
   |                  |   |                  |  
   |                  |   |                  |  
   |                  |   |                  |  
   |                  |BAR|                  |v (Cube: 1)
   |                  |   |                  |  
   |    O        X    |   |                  |  
   | O  O  X  X  X  X |   |                  |  
   | O  O  X  X  X  X |   | X                |  On roll
   | O  O  X  X  X  X |   | X                |  0 points
   +-1--2--3--4--5--6-------7--8--9-10-11-12-+  X: Midas

Output generated Thu Oct 17 15:55:31 2002
by GNU Backgammon 0.12 (Text Export version 1.19)

Cube analysis
2-ply cubeless equity  +0.211
 0.606 0.382 0.142 - 0.394 0.010 0.000
1. Double, pass         +1.000
2. Double, take         +1.182  ( +0.182)
3. No double            +0.896  ( -0.104)
Proper cube action: Double, pass