Bug 348523

Summary:	Puzzles may have ambiguous solutions
Product:	[Applications] picmi	Reporter:	Martin Walch <walch.martin>
Component:	general	Assignee:	Jakob Linke <jakob>
Status:	REOPENED ---
Severity:	normal	CC:	byrial.jensen
Priority:	NOR
Version First Reported In:	2.0.0
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:	http://commits.kde.org/picmi/57254a4619ed8ff644bdcad041ebefde60405a24	Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	screenshot showing ambiuousness of puzzle's solution Screenshot of "hourglass" with all but the ambiguous part solved

Description Martin Walch 2015-05-31 21:02:49 UTC

Games may have more than one valid solution.

It is debatable if this should be allowed to happen or not. However, at least the loadable game "Soccer" has also two solutions. I suppose this is undesirable.

In other words: at least the solutions for loadable games should be unambiguous.

Reproducible: Always

Comment 1 Martin Walch 2015-05-31 21:19:14 UTC

Created attachment 92944 [details]
screenshot showing ambiuousness of puzzle's solution

Comment 2 Jakob Linke 2015-06-22 04:25:12 UTC

Sorry for the late reply, I was out of the country for a while. We did try to avoid having ambiguous solutions for the preset puzzles, looks like we must've missed one. Did you have a suggested fix for this particular one? 

I'm also fine with keeping this one as is since it's a minor difference and looks decent both ways.

Comment 3 Martin Walch 2015-07-13 09:26:58 UTC

(In reply to Jakob Gruber from comment #2)
> Did you have a suggested fix for this particular one?
After thinking about this for a while: how about filling the ball? I have not double checked it, but I suppose that the solution then becomes unambiguous.

Comment 4 Jakob Linke 2015-07-15 09:20:28 UTC

Git commit 57254a4619ed8ff644bdcad041ebefde60405a24 by Jakob Gruber.
Committed on 15/07/2015 at 09:20.
Pushed by gruber into branch 'master'.

Fix an ambiguous solution to the soccer level

Bug report & fix idea by Martin Walch, thanks!

M  +2    -2    levels/default/soccer.xpm

http://commits.kde.org/picmi/57254a4619ed8ff644bdcad041ebefde60405a24

Comment 5 Byrial Jensen 2020-03-21 17:31:32 UTC

Created attachment 126929 [details]
Screenshot of "hourglass" with all but the ambiguous part solved

Also the puzzle "hourglass" is ambiguous. I attach a screenshot with all but 8 fields solved. It is easy to see that the remaining 8 fields can be solved in 2 ways due to symmetry. I am not 100 % sure, but the solution would probably be unique if e.g. highlighted field was filled instead of blank.

Comment 6 Jakob Linke 2020-04-10 07:14:21 UTC

#5: Thanks for reporting. Next time please file a new bug since this is a different (though similar) issue to the one reported 5 years ago ;)