Puzzle Description:

Why is this happening?

#1: Kristen Vognild (kristen) on Mar 17, 2012 [SPOILER]

Eek! Sentient scissors!!

after initial line logic:

the black pixels in r15c18 and r16c18 are both part of "2" clues in their respective rows but they cant both go to the left into c17 so either r15c19 or r16c19 must be black and you can dot r14c19 and line logic solves it out
no guessing

Wow, glad I found this one! No comments in 9 years.
And mootpoint, why IS this happening?

Maybe because you're not supposed to run WITH scissors.

I think this was one of a small series.

Great illustration of the title.

Found to be solvable by line and color logic alone by valerie.

This puzzle is marked as solvable with line and color logic, but I used lookahead to solve it. Should I change the setting, or can it indeed be done with line and color logic?

I'll put in another vote for moderate lookahead. Bugaboo's solution does use lookahead and not strict line logic, and the hints showed nothing. But I'd rather have one more person verify before changing the solvability.

(what remains: c11-19/r16-18 and c17-19 R14-16.)

I just re-solved the puzzle and still think it needs mild lookahead. Also I see that the site says it was me (and not the software) who marked it solvable by line and color logic, right before my comment #8, so I'm guessing that I somehow fat-fingered the pulldown. So I'll go change it to moderate lookahead.

Here's how I solved it:

If you try the black 2 from row 18 in columns 11-12, then you quickly get a black 6 in row 16 -- and row 16 doesn't have any sixes. So you can mark dots in row 18 columns 11-12. Then the rest of the puzzle solves by line logic.

Found to be solvable with moderate lookahead by valerie.

Goto next topic

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