buggnubg - Bugs: bug #40475, Saved cube decision position is...


bug #40475: Saved cube decision position is flipped after deeper evaluation and save

Submitted by:  Tom Martin <tom_martin>
Submitted on:  Mon 04 Nov 2013 08:24:36 PM UTC  
Originator Name:  Tom Martin Item Group:  Other bug
Category:  Loading and saving of SGF files Release:  1.01-Release
Privacy:  Public Operating System:  Windows XP
Severity:  3 - Normal Open/Closed:  Open
Assigned to:  None Priority:  5 - Normal
Status:  Need Info

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Wed 22 Jan 2014 03:51:47 AM UTC, comment #4: 

Just to clarify why doing a rollout BEFORE saving a position is often undesirable, if you've missed a double and want to pose the position as a cube decision, you must first remove the dice and substitute a double.  Since this destroys the rollout information you must save it first and then do a rollout, but this no longer works properly.

Tom Martin <tom_martin>
Mon 13 Jan 2014 12:08:36 PM UTC, comment #3: 

Here's something interesting - the bug affects EVERY position where I've doubled but NONE of the positions where GNUBG doubles.  Anyway, here are the workarounds for this. 

For your take decisions, save the bot's double decision; you can later roll this out without any complications.

For your doubles or bad bot take decisions, save the GAME.  When you later roll it out, it will work fine and you can then save the position.

And naturally you can always roll the decision out BEFORE doing any saving, although this isn't always desirable.  

Tom Martin <tom_martin>
Tue 19 Nov 2013 01:10:56 AM UTC, comment #2: 

Were my emails enough to clarify the problem?  Here's the short version:

I can reproduce this problem most simply by saving ANY position where I've doubled and then opening it and clicking the evaluate button for any level (or do a rollout).  When you then save it and reopen it the wrong player is shown on move (with the weaker position doubling) with the game record agreeing with this oddity.  When you then click on the double, "unknown cube decision" appears.       

Tom Martin <tom_martin>
Thu 14 Nov 2013 09:41:39 PM UTC, comment #1: 

I can't reproduce this. Are the checkers upside down or is the wrong player on roll ? What do you mean by evaluate ? Is it using the Hint button (that's what I did), or Analyse|Evaluate, or Analyse|Analyse match or session ?

Could you attach the sgf files (evaluated and non-evaluated).

Philippe Michel <plm>
Project Administrator
Mon 04 Nov 2013 08:24:36 PM UTC, original submission:  

Save a cube decision as a position.  Open it, evaluate it as 4-ply, then save it.  Open it again and the position has been "flipped" (and not in a way that has any kind of workaround).

Tom Martin <tom_martin>


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    Follows 1 latest change.

    Date Changed by Updated Field Previous Value => Replaced by
    2013-11-14 plm StatusNone => Need Info

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