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Re: [Bug-gnubg] Re: gnubg bug? Baseline Information

From: Michael Petch
Subject: Re: [Bug-gnubg] Re: gnubg bug? Baseline Information
Date: Wed, 05 Aug 2009 13:01:17 -0600
User-agent: Microsoft-Entourage/12.20.0.090605

To start things off properly and establish a baseline, I’m going to post my gnubgautorc (see attachment). The commands you can paste directly into gnubg at the command line to do the tests are:

set lang C
set evaluation chequerplay evaluation plies 2
set evaluation chequerplay evaluation cubeful on
set evaluation chequerplay evaluation prune on
set evaluation cubedecision evaluation plies 2
set evaluation cubedecision evaluation cubeful on
set evaluation cubedecision evaluation prune on
set gnubgid NwAAgN3MAGgBAA:cAnmAEAAIAAA
hint 1

set evaluation chequerplay evaluation prune off
set evaluation cubedecision evaluation prune off
set gnubgid NwAAgN3MAGgBAA:cAnmAEAAIAAA
hint 1

Please note, I discovered that if you toggle pruning on/off and then do Hint without setting the gnubgid then the position isn’t re-evaluated. Its important to so set gnubgid after changing the pruning parameters. If you use my gnubgautorc, if it fails loading the MET – just ignore the warning message (The MET doesn’t influence the outcome).

Below is a successful test, and an unsuccessful one.

------------------------
SUCCESSFUL TEST
------------------------

With all that being said here is the expected output (This is on my Intel Mac OS/X 10.5 with –g -O2 ):
mpetchs-intel-mac:Desktop mpetch$ gnubg -t
GNU Backgammon 0.90.0  Aug  4 2009
Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 by Gary Wong.
Copyright (C) 2009 by Gary Wong and the AUTHORS; for details type `show version'.
This program comes with ABSOLUTELY NO WARRANTY; for details type `show warranty'.
This is free software, and you are welcome to redistribute it under certain conditions; type `show copying' for details.
(No game) set lang C
Locale is now 'C'(No game) set evaluation chequerplay evaluation plies 2
`eval' and `hint' chequerplay will use 2 ply evaluation.
(No game) set evaluation chequerplay evaluation cubeful on
`eval' and `hint' chequerplay will use cubeful evaluation.

(No game) set evaluation chequerplay evaluation prune on
`eval' and `hint' chequerplay will use pruning.

(No game) set evaluation cubedecision evaluation plies 2
`eval' and `hint' cube decisions will use 2 ply evaluation.
(No game) set evaluation cubedecision evaluation cubeful on
`eval' and `hint' cube decisions will use cubeful evaluation.

(No game) set evaluation cubedecision evaluation prune on
`eval' and `hint' cube decisions will use pruning.

(No game) set gnubgid NwAAgN3MAGgBAA:cAnmAEAAIAAA
The dice have been set to 4 and 1.
 GNU Backgammon  Position ID: 4HPwATDgc/ABMA
                 Match ID   : cAnmAEAAIAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 | X           O    |   | O              X |     4 points
 | X           O    |   | O              X |     
 | X           O    |   | O                |     
 | X                |   | O                |     
 | X                |   | O                |    
v|                  |BAR|                  |     7 point match (Cube: 1)
 | O                |   | X                |    
 | O                |   | X                |     
 | O           X    |   | X                |     
 | O           X    |   | X              O |     Rolled 41
 | O           X    |   | X              O |     4 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: mpetch

 GNU Backgammon  Position ID: NwAAgN3MAGgBAA
                 Match ID   : cAnmAEAAIAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 |                  |   | X  X  X     O  O | OO  4 points
 |                  |   |    X        O  O | OO  
 |                  |   |                O | OO  
 |                  |   |                  | OO  
 |                  |   |                  | OO
v|                  |BAR|                  |     7 point match (Cube: 1)
 |                  |   |                  |    
 |                  |   |                  |     
 |                  |   |          X       |     
 |             X    |   | X     X  X  X    |     Rolled 41
 |             X    |   | X     X  X  X    |     4 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: mpetch

Setting GNUBG id NwAAgN3MAGgBAA:cAnmAEAAIAAA
(mpetch ) hint 1
    1. Cubeful 2-ply    21/17 19/18                  Eq.:  -2.729              
       0.000 0.000 0.000 - 1.000 1.000 0.085
        2-ply cubeful prune [world class]
(mpetch )
(mpetch ) set evaluation chequerplay evaluation prune off
`eval' and `hint' chequerplay will not use pruning.

(mpetch ) set evaluation cubedecision evaluation prune off
`eval' and `hint' cube decisions will not use pruning.

(mpetch ) set gnubgid NwAAgN3MAGgBAA:cAnmAEAAIAAA
The dice have been set to 4 and 1.
 GNU Backgammon  Position ID: NwAAgN3MAGgBAA
                 Match ID   : cAnmAEAAIAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 |                  |   | X  X  X     O  O | OO  4 points
 |                  |   |    X        O  O | OO  
 |                  |   |                O | OO  
 |                  |   |                  | OO  
 |                  |   |                  | OO
v|                  |BAR|                  |     7 point match (Cube: 1)
 |                  |   |                  |    
 |                  |   |                  |     
 |                  |   |          X       |     
 |             X    |   | X     X  X  X    |     Rolled 41
 |             X    |   | X     X  X  X    |     4 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: mpetch

 GNU Backgammon  Position ID: NwAAgN3MAGgBAA
                 Match ID   : cAnmAEAAIAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 |                  |   | X  X  X     O  O | OO  4 points
 |                  |   |    X        O  O | OO  
 |                  |   |                O | OO  
 |                  |   |                  | OO  
 |                  |   |                  | OO
v|                  |BAR|                  |     7 point match (Cube: 1)
 |                  |   |                  |    
 |                  |   |                  |     
 |                  |   |          X       |     
 |             X    |   | X     X  X  X    |     Rolled 41
 |             X    |   | X     X  X  X    |     4 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: mpetch

 GNU Backgammon  Position ID: NwAAgN3MAGgBAA
                 Match ID   : cAnmAEAAIAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 |                  |   | X  X  X     O  O | OO  4 points
 |                  |   |    X        O  O | OO  
 |                  |   |                O | OO  
 |                  |   |                  | OO  
 |                  |   |                  | OO
v|                  |BAR|                  |     7 point match (Cube: 1)
 |                  |   |                  |    
 |                  |   |                  |     
 |                  |   |          X       |     
 |             X    |   | X     X  X  X    |     Rolled 41
 |             X    |   | X     X  X  X    |     4 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: mpetch

Setting GNUBG id NwAAgN3MAGgBAA:cAnmAEAAIAAA
(mpetch ) hint 1
    1. Cubeful 2-ply    21/17 19/18                  Eq.:  -2.729              
       0.000 0.000 0.000 - 1.000 1.000 0.085
        2-ply cubeful
(mpetch )

----------------------------
UNSUCCESSFUL TEST
----------------------------


On a system (Debian Lenny Stable –32 Bit) using –g –O2 as the compiler options, we get this unusual output:

GNU Backgammon 0.90.0  Aug  4 2009
Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 by Gary Wong.
Copyright (C) 2009 by Gary Wong and the AUTHORS; for details type `show version'.
This program comes with ABSOLUTELY NO WARRANTY; for details type `show warranty'.
This is free software, and you are welcome to redistribute it under certain conditions; type `show copying' for details.

(No game) set lang C
Locale is now 'C'(No game) set evaluation chequerplay evaluation plies 2
`eval' and `hint' chequerplay will use 2 ply evaluation.
(No game) set evaluation chequerplay evaluation cubeful on
`eval' and `hint' chequerplay will use cubeful evaluation.

(No game) set evaluation chequerplay evaluation prune on
`eval' and `hint' chequerplay will use pruning.

(No game) set evaluation cubedecision evaluation plies 2
`eval' and `hint' cube decisions will use 2 ply evaluation.
(No game) set evaluation cubedecision evaluation cubeful on
`eval' and `hint' cube decisions will use cubeful evaluation.

(No game) set evaluation cubedecision evaluation prune on
`eval' and `hint' cube decisions will use pruning.

(No game) set gnubgid NwAAgN3MAGgBAA:cAnmAEAAIAAA
The dice have been set to 4 and 1.
 GNU Backgammon  Position ID: 4HPwATDgc/ABMA
                 Match ID   : cAnmAEAAIAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 | X           O    |   | O              X |     4 points
 | X           O    |   | O              X |     
 | X           O    |   | O                |     
 | X                |   | O                |     
 | X                |   | O                |    
v|                  |BAR|                  |     7 point match (Cube: 1)
 | O                |   | X                |    
 | O                |   | X                |     
 | O           X    |   | X                |     
 | O           X    |   | X              O |     Rolled 41
 | O           X    |   | X              O |     4 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: mpetch

 GNU Backgammon  Position ID: NwAAgN3MAGgBAA
                 Match ID   : cAnmAEAAIAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 |                  |   | X  X  X     O  O | OO  4 points
 |                  |   |    X        O  O | OO  
 |                  |   |                O | OO  
 |                  |   |                  | OO  
 |                  |   |                  | OO
v|                  |BAR|                  |     7 point match (Cube: 1)
 |                  |   |                  |    
 |                  |   |                  |     
 |                  |   |          X       |     
 |             X    |   | X     X  X  X    |     Rolled 41
 |             X    |   | X     X  X  X    |     4 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: mpetch

Setting GNUBG id NwAAgN3MAGgBAA:cAnmAEAAIAAA
(mpetch ) hint 1
    1. Cubeful 2-ply    20/16 19/18                  Eq.:  -2.828              
       0.000 0.000 0.000 - 1.000 1.000 0.124
        2-ply cubeful prune [world class]
(mpetch )
(mpetch ) set evaluation chequerplay evaluation prune off
`eval' and `hint' chequerplay will not use pruning.

(mpetch ) set evaluation cubedecision evaluation prune off
`eval' and `hint' cube decisions will not use pruning.

(mpetch ) set gnubgid NwAAgN3MAGgBAA:cAnmAEAAIAAA
The dice have been set to 4 and 1.
 GNU Backgammon  Position ID: NwAAgN3MAGgBAA
                 Match ID   : cAnmAEAAIAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 |                  |   | X  X  X     O  O | OO  4 points
 |                  |   |    X        O  O | OO  
 |                  |   |                O | OO  
 |                  |   |                  | OO  
 |                  |   |                  | OO
v|                  |BAR|                  |     7 point match (Cube: 1)
 |                  |   |                  |    
 |                  |   |                  |     
 |                  |   |          X       |     
 |             X    |   | X     X  X  X    |     Rolled 41
 |             X    |   | X     X  X  X    |     4 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: mpetch

 GNU Backgammon  Position ID: NwAAgN3MAGgBAA
                 Match ID   : cAnmAEAAIAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 |                  |   | X  X  X     O  O | OO  4 points
 |                  |   |    X        O  O | OO  
 |                  |   |                O | OO  
 |                  |   |                  | OO  
 |                  |   |                  | OO
v|                  |BAR|                  |     7 point match (Cube: 1)
 |                  |   |                  |    
 |                  |   |                  |     
 |                  |   |          X       |     
 |             X    |   | X     X  X  X    |     Rolled 41
 |             X    |   | X     X  X  X    |     4 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: mpetch

 GNU Backgammon  Position ID: NwAAgN3MAGgBAA
                 Match ID   : cAnmAEAAIAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 |                  |   | X  X  X     O  O | OO  4 points
 |                  |   |    X        O  O | OO  
 |                  |   |                O | OO  
 |                  |   |                  | OO  
 |                  |   |                  | OO
v|                  |BAR|                  |     7 point match (Cube: 1)
 |                  |   |                  |    
 |                  |   |                  |     
 |                  |   |          X       |     
 |             X    |   | X     X  X  X    |     Rolled 41
 |             X    |   | X     X  X  X    |     4 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: mpetch

Setting GNUBG id NwAAgN3MAGgBAA:cAnmAEAAIAAA
(mpetch ) hint 1
    1. Cubeful 2-ply    21/17 19/18                  Eq.:  -2.729              
       0.000 0.000 0.000 - 1.000 1.000 0.085
        2-ply cubeful
(mpetch )


Attachment: gnubgautorc
Description: Binary data

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