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Comments on Puzzle #803: You light up my life
By Robert Kummerfeldt (rmkummerfeldt)

peek at solution       solve puzzle
  quality:   difficulty:   solvability: moderate lookahead  

Puzzle Description Suppressed:Click below to view spoilers

#1: Zapman (Zapman) on Nov 4, 2007

Am I missing something here?

Can this one actually even be started just by logical thinking?
#2: Robert Kummerfeldt (rmkummerfeldt) on Mar 15, 2007 [HINT]
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#3: Jan Wolter (jan) on Mar 16, 2007
Well, I was able to confirm that it does have only one possible solution, but though the approach you suggest does get me some distance into the puzzle, I had to do some pretty deep trial and error, investigating possibilities pretty far along before finding a contradiction so I could "undo" or "revert" my way back up again. I'm afraid I would have to classify it as a trial and error puzzle, though I'm not necessarily the cleverest solver on the block.

So, on the whole, I guess the puzzle does exactly what you want it to do, and I recognize that getting it all to work out and still have a decent picture at the end must have taken a lot of work. Pretty impressive.
#4: Jan Wolter (jan) on Mar 16, 2007
As you say, it is pretty easy to find the solution by guessing.
#5: Marie-Louise Ambrey (marz) on Jun 23, 2007
I've just discovered that Im really good at logical guessing :)
#6: Hirameki (hirameki) on Nov 1, 2007 [HINT]
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#7: Nancy Snyder (naneki) on Jun 1, 2008
I really don't understand why this one is marked "may required guessing"
#8: Deana L (FFsWife) on Jun 12, 2008
This puzzle has come up on my random puzzle click hundreds of times. Today, I decided to dive in. May not REQUIRE guessing, but it sure does help! :D
#9: Jan Wolter (jan) on Nov 10, 2009
This puzzle is one of the ones that I used as a sample puzzle in my Survey of Paint-by-Number Puzzle Solvers as an example of a really difficult puzzle that still has a unique solution. It stumps about half of the better solvers, so Robert really succeeded at his goal of designing a really hard puzzle.

I don't think Robert comes around here much these days, but if he does, I wonder if he would be willing to give permission to allow this puzzle to be freely redistributed as part of a standard test set for developers of new solving programs.

#10: Robert Kummerfeldt (rmkummerfeldt) on Aug 20, 2010
Jan - feel free to use anything I've done for whatever you need. I don't design puzzles for profit, just a change of pace from solving, and have no problem with whatever you want to do with them.
#11: Jan Wolter (jan) on Aug 28, 2010
Thanks
#12: Gator (Gator) on Dec 16, 2010 [HINT]
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#13: Gator (gator) on Jul 26, 2011 [HINT]
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#14: Web Paint-By-Number Robot (webpbn) on Jul 26, 2011
Found to be logically solvable by gator.
#15: GabrielMyCat (gabrielmycat) on Dec 28, 2011 [HINT] [SPOILER]
Comment Suppressed:Click below to view hints and spoilers
#16: Michael A Rodgers (marodgers) on Mar 15, 2014 [SPOILER]
Comment Suppressed:Click below to view spoilers
#17: BlackCat (BlackCat) on Jun 25, 2014
Not fun.
#18: karl (keicher) on May 8, 2018
i apologize to anyone else i gave a 1 star review to. this is at the bottom - total waste of time.
#19: Kristen Vognild (kristen) on May 9, 2018
Hey, it's karl!
#20: Gator (gator) on May 17, 2018 [HINT]
Comment Suppressed:Click below to view hints

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