Puzzle Description:

#1: Kristen Vognild (kristen) on Apr 23, 2013

Nice little puzzle. I didn't have to guess.

Yes, nice puzzle. I got mixed up in the blue, but got it fixed.

after initial ll/cl you should only have the blue left to solve:

look at the two blue pixels in r4c3-4 and the two blue pixels in r4c6-7
each of them is part of a 2-clue or a 3-clue in each of those four columns
the ones in c3-4 cant both go into r3 or both go into r5 so at least one of them must be in r3c3 or r3c4, accounting for the first 1-clue in r3
do the same thing in c6-7 to show that the other 1-clue in r3 must go in either c6 or c7, so you can dot the rest of r3 except for those 4 columns
ll
now do similar logic on r9c3-4 and r9c6-7 to show that the two 1-clues in r10 must be either c3-4 and in either c6-7, dotting the rest of r9, which is only c1-2
ll to finish
no guessing
great solve on the blue

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Hey bug, it looks like we looked at the same thing two slightly different ways and almost at the same time. You type faster than I do. It must be the lack of capitals. ;)

plus i wrote a lot less than you did
haha

Now I tried to solve my own puzzle.
Yes, it can be solved with pure line logic (thanks to Gods) :)

Comment Suppressed:Click below to view hints

Nice solve & idea Thomas. Maybe you might want to see one of mine from the past #12936

Joe,
Logic is logic. There're no better or worse logics but good or bad.
In our press I wrote about the two solving modes (about ten years ago). Then I defined that two methods are really the same logic. Now I can use it in the same time while don't need to make difference.

Tom, OK.

While logic *is* logic, it's a bit like saying a cow is a cow. If I bought a beef cow and the farmer delivered me a milk cow (which is all bones and udder) I would be very upset. Even though milk caws are fine if you want milk, they're not what I was sold. Line logic is a specific kind of logic used in these puzzles. Some sites restrict makers to only line-logic puzzles. Here any kind is allowed - and even puzzles that cannot be solved logically.

This is obviously less calamitous than the cow example, but if someone says that a puzzle is "line logic" solvable then it should not need any advanced techniques. Otherwise, just say that it is "logically solvable".

OK, we mean different things of logic. I'd never understood that kind of instructions: "Use only one row or column at the same time". Why? Because it's a false sentence. Every puzzles are good when they've got only one (unique) solve. It's the only logical limit for this type of puzzles. Every other "logic rule" are false.
The mentioned writing was able to define that all solving systems can be derived to one "logical rule". It's not easy, like the famous "four-colours".

Found to be solvable with moderate lookahead by gator.

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