Dear people,
Why does this particular android game not accept the solution on the right side?
Rules in the app:
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$\begingroup$ @flagged the question because it is all about software bug... $\endgroup$– Sayed Mohd AliCommented Sep 4, 2019 at 13:41
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3$\begingroup$ @PerpetualJ That's not clear from the outset though. Questions shouldn't become off-topic just because of their answers. OP wanted to know if they're solving the puzzle incorrectly or not, which is perfectly within our site's ballpark. $\endgroup$– Rand al'ThorCommented Sep 4, 2019 at 14:22
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1 Answer
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Both solutions are correct. Probably your game doesn't check solution uniqueness well enough.
The rules of Heyawake, as given by your game, are:
A room containing a number must have the designated number of cells painted black. Other rooms may have zero or more cells painted black.
Check. Your change doesn't affect any rooms with numbers in them.
Black cells must not be orthogonally connected.
Check. The only change between your two possible solutions is to move one isolated black (or rather grey) cell.
All white cells must be interconnected.
Check. Your change doesn't isolate any white (or rather green) cells.
A line of connected white cells must not connect more than two rooms together.
Check. In fact, your "wrong" solution has shorter straight lines of connected white (or in this case green) cells than the "right" one!
It's possible that your game is buggy somehow: it found a solution but didn't check for uniqueness, so in the case of a non-unique solution it's programmed to accept whichever one it knows and reject others as incorrect.
answered Sep 4, 2019 at 7:48
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3$\begingroup$ Yeah, the solution on the right is correct according to all rules of Heyawake. It's likely that that particular app has the "correct" solution hard-coded in, and they didn't check their puzzles for uniqueness well enough. $\endgroup$– Deusovi ♦Commented Sep 4, 2019 at 7:49