Comments on Puzzle #7886: quack quack
By rayven shad (rayven.1)
peek at solution solve puzzle
quality: 
difficulty: 
solvability: much guessing
peek at solution solve puzzle
quality: difficulty: solvability: much guessing
Puzzle Description:
#1: Adam Nielson (monkeyboy) on Feb 22, 2010
Hint please, Gator (if one is even possible). I couldn't solve this logically at all.#2: Jane Doe (telly) on Feb 22, 2010
This is actually a very good small image, which could be improved by filling in a few more pixels at several intersections.
agree with #1.#3: Gator (Gator) on Feb 23, 2010 [HINT]
nice image, but, I can't see how to solve it logically.
I doubt this can be solved with logic. It seems that it was created more with the image in mind than the logic.#4: Web Paint-By-Number Robot (webpbn) on Jun 1, 2017
Found to require lots of guessing by gator.#5: Gator (gator) on Jun 1, 2017 [HINT]
Went back and looked at this one, and could not find a good way to tackle this one even with looking many moves ahead.#6: Ki Bitzar (kibitzar) on Sep 27, 2017 [HINT]
The trick to get started is to check what happens if L14 C2 is blank. A bit of lookahead leads to a contradiction. From there on is much easier to get it done, but it needs deep lookahead.#7: Gator (gator) on Sep 27, 2017 [HINT]
Once I use the logic you pointed out and do LL...
EL on R16 makes C3-4 dots. LL.
EL on C3 makes R2-3 dots.
EL on R2 makes C4 a dot.
And now some deep lookahead. Assume the clues in R14 go as far left as possible. This makes R6-9 and R13-16 black and R17-20 dots. This causes R15-16C18 to be dots and R13C13 and R13C16 to be black. This then causes R16C6-9 to be black. And finally R13C7-8 to be black which makes R13 invalid. This was looking 4 moves ahead. So this tells us that the clues cannot go all the way left and R14C17 must be black. LL.
I'm going to stop here for now. Not sure if it is worth it to continue.
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