Puzzle Description:

what a thrill it must be to soar to those heights.

#1: Ron Jacobson (shmily999) on Aug 27, 2010

I didn't have to guess. Nice challenge.

Color logic!

cool puzzles!

Just because I had difficulty solving this with color logic alone (I got stuck with the blue in C7-C12 and had to go several steps ahead to eliminate pixels for the placement of the 4 in C7), could someone who didn't resort to something like that share a more elegant solution?

I liked the final image...simple, yet effective.

I used edge logic to make R11C7, R20C7 and R13C12 dots, but this didn't help much.

I then looked at the 4 clue in column 7. Looking at all possibilities (there are only 3 that do not immediately make column 8 invalid) on how this affects column 8, we can see that in each case R11C8 will be a dot. Also we can see that R13C8 will always be blue.

I then looked at all of the possibilities in column 12. In every case, R17C12 and R18C12 are always dots.

That's all I have for now. Am I missing something Brian?

My solution didn't require guessing. once the green columns were done(c3 & c18), finding the four blues in c7 that made c8 work out was easy. then everything else fell into place. I really don't know why this puzzle is classified as some guessing. I just solved it a second time to check.

There are 3 possible places that the 4 clue can go: R12C7-R15C7, R13C7-R16C7, or R16C7-R19C7. It took looking 4 moves ahead to see that it cannot go in the top position. It also takes looking 4 moves ahead to see that the middle one will not work. Looking 4 moves ahead is considered guessing.

I suppose I do stuff by brute force. Trial and Error is considered guessing too.

Nice image and fun to solve. Although I did have to resort to guessing at the end.

Found to require some guessing by Gator.

Found to be solvable with deep lookahead by gator.

Re-classified.

I would've called this moderate lookahead. It was fairly standard color logic until you get to the blue, and then it's doable with edge logic on the blue.

It was cool to see a ! by the puzzle, to signify deep lookahead :)

For some reason this reminded me of this: https://www.youtube.com/watch?v=Asxr5v9arH4
Remember it?

Great action!

I did have to guess on the blue 4 but otherwise I found it very doable and quite impressive for such a small puzzle. Great job.

Dynamic!

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