Comments on Puzzle #8105: Ten-4
By Josh Greifer (joshgreifer)
peek at solution solve puzzle
quality: 
difficulty: 
solvability: moderate lookahead
peek at solution solve puzzle
quality: difficulty: solvability: moderate lookahead
Puzzle Description Suppressed:Click below to view spoilers
#1: Josh Greifer (joshgreifer) on Mar 19, 2010 [HINT]
Comment Suppressed:Click below to view hints#2: Al LaPointe (kancamagus) on Mar 19, 2010 [HINT]
Comment Suppressed:Click below to view hints#3: Tom O'Connell (sensei69) on Mar 19, 2010
i solved it w/o guessing .... but no reward afterwards#4: Adam Nielson (monkeyboy) on Mar 19, 2010
Hmmm...#5: Jan Wolter (jan) on Mar 21, 2010 [HINT]
Comment Suppressed:Click below to view hints#6: Josh Greifer (joshgreifer) on Mar 25, 2010 [HINT]
Comment Suppressed:Click below to view hints#7: Jan Wolter (jan) on Mar 26, 2010
Yes. Obviously any puzzle with a unique solution is logically solvable if you are willing to allow sufficiently long and complex chains of reasoning. But clearly there is some point where that ceases to be fun. This point is of course different for different people.#8: David Bouldin (dbouldin) on Sep 22, 2011 [HINT] [SPOILER]
One of the nice things about having a community component to this web site is that it has allowed us to evolve a local consensus as to what is and is not "unreasonably hard". We've standardized a few techniques that go beyond standard line solving, like edge logic, smile logic, and two-way logic. (Or did I call that either-or logic? I can never remember.) Hints in the comments help people unfamiliar with those ideas get up to speed on them, so that puzzle requiring that level of complexity are considered "normal" here, though some places won't publish a puzzle that isn't line-solvable.
So there is no automatic right answer for what is and is not acceptable, only a local consensus that holds within a puzzle solving community. I always want this site to allow people to push the envelope, because sometimes they can take us along with them into whole new realms. That's happening a lot over the years. If you look at the comments on the early puzzles on this site, you'll see people calling puzzles "hard" that by current standards aren't really very hard. We've collectively become much better solvers, and that impacts the design of puzzles, since it encourages the posting of harder puzzles.
Comment Suppressed:Click below to view hints and spoilers#9: Web Paint-By-Number Robot (webpbn) on Oct 7, 2011
Found to be logically solvable by gator.#10: Gator (gator) on Oct 7, 2011 [HINT]
Comment Suppressed:Click below to view hints#11: RB (rb2013) on Aug 3, 2018
Ditto #8, exactly#12: Bill (PopPop ) on Mar 30, 2023
Jan, you really are missed!
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