buggnubg - Bugs: bug #39471, Erratic doubling cube behavior in...

 
 

bug #39471: Erratic doubling cube behavior in beginner levels

Submitted by:  Frank Kroeger <gnunoob>
Submitted on:  Fri 12 Jul 2013 07:16:45 AM UTC  
 
Originator Name:  Frank Item Group:  Other bug
Category:  Evaluations Release:  0.90-devel
Privacy:  Public Operating System:  Windows 8
OS Type:  64Bit Processor Type:  Intel
Severity:  3 - Normal Open/Closed:  Closed
Assigned to:  Philippe Michel <plm> Priority:  5 - Normal
Status:  Fixed

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Fri 12 Jul 2013 02:29:48 PM UTC, comment #2:

Build: Version GNU Backgammon 0.90-mingw 20121023

Evaluation Engine:

  • Contact neural network evaluator:

- version 0.15, 250 inputs, 128 hidden units.

  • Crashed neural network evaluator:

- version 0.15, 250 inputs, 128 hidden units.

  • Race neural network evaluator:

- version 0.15, 214 inputs, 128 hidden units.

  • In memory 1-sided bearoff database evaluator

- generated by GNU Backgammon
- up to 15 chequers on 6 points (54264 positions) per player
- database includes gammon distributions
- number of reads: 0

  • In memory 2-sided bearoff database evaluator

- generated by GNU Backgammon
- up to 6 chequers on 6 points (924 positions) per player
- database includes both cubeful and cubeless equities
- number of reads: 0

Frank Kroeger <gnunoob>
Fri 12 Jul 2013 01:47:10 PM UTC, comment #1:

What specific version of GNUBG are you using? You can find out by going to Help/About gnubg/Build Info . The version is on the top line of the Buildinfo screen.

Michael Petch <mdpetch>
Project Administrator
Fri 12 Jul 2013 07:16:45 AM UTC, original submission:

As an absolute beginner, I've only played the lower levels (Beginner to Intermediate) so far and I noticed in each of them erratic doubling cube decisions.

For an example, have a look at the fifth game in the attached .sgf file. I was only 4 pieces away from winning the game when GnuBG unexpectedly redoubled after roll #22.

Position ID: 880ASAnvAQAAAA
Match ID: QQnpABAAIAAE

Most likely there's something wrong with the noise generation that nobody noticed so far presumably because most players play GnuBG at full strength.

Frank Kroeger <gnunoob>

 

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

Attach Files:
   
   
Comment:
   

Attached Files
file #28549:  double_nonsense.sgf added by gnunoob (256KiB - application/octet-stream)
file #28548:  GnuBGDoubleBug.jpg added by gnunoob (236KiB - image/jpeg)

 

Depends on the following items: None found

Items that depend on this one: None found

 

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    Follow 6 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    Wed 21 May 2014 11:13:32 AM UTC plm Open/ClosedOpen => Closed
        StatusIn Progress => Fixed
    Tue 20 May 2014 03:04:32 PM UTC plm Assigned toNone => plm
        StatusNone => In Progress
    Fri 12 Jul 2013 07:16:46 AM UTC gnunoob Attached File- => Added GnuBGDoubleBug.jpg, #28548
        Attached File- => Added double_nonsense.sgf, #28549

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