Puzzle Description:

think green

#1: annalivia (annalivia) on May 24, 2011 [SPOILER]

Dublin

oh i get it now
you are "doubling" (doublin')

i dont think regular logic can solve this

clever!

Have an ale for me annalivia.

had to resort to symmetry logic with an assumed unique solution.

ditto #5

Cute pun.

Found to require some guessing by gator.

I also had to use symmetry.

I found this able to be solved with no look-ahead. There is however, some out-of-the-box thinking to be done. I made a tutorial to explain:
http://infrapinklizzard.deviantart.com/art/Logic-14154-211769555

The gist is that the 2 in c5 must be next to both the 4 in c4 and the 4 in c6. Therefore there must be two horizontal blocks of three pixels. The only place they can go is in rows 5&6. See the tutorial for a more detailed explanation.

This is why I make these tutorials! The AHA moment when something clicks is the very opium of puzzledom. Writing these tutorials forces me to think deeply about what I'm doing and confront all the possibilities.

When I was halfway through writing this the first time, I realized I had missed a possibility. "AAArgh!" I thought. But putting that aside and reassessing it from another angle brought an even more elegant solution.

Happiness!

i think this is logic-only solvable using an "extended" form of smile logic. working it out without smile logic would take too much look-ahead though.

Found to be solvable with deep lookahead by jan.

Joe's analysis is cool. I'm promoting this to "solvable with deep lookahead". I'm not exactly sure how many steps of lookahead there are in Joe's analysis, but it's certainly deep thinking of some sort.

Goto next topic

You must register and log in to be able to participate in this discussion.