Puzzle Description:

A city in the sky... Flying cars in highways in the air.

#1: Kristen Vognild (kristen) on Jun 3, 2011

Nice image! Unfortunately, the rules this time call for B&W only. The Honors tab gives the details, as well as Forum 112.

Lol, I just figured out that B&W means black and white.

That's funny Lilly. Neat puzzle.

And can't solve w/o guessing.

Line logic solves all rows from 8-20. Color logic places all the red.

The 17 in r7 has fourteen pixels placed due to line logic. Edge logic (thinking along smile-logic lines) places an additional two pixels - one at either end; and also makes r7c1&20 white.

Then deep edge logic on the 5s in r4. Neither r3 nor r5 have any 1s in them. So the 5s cannot cross anything that would cause blocks of 1 in those rows.

Now look at the pattern of 1s and 2s in the columns. The left 5 cannot go left of c4 or it would cause a block of 1 either above it or below it. (It would cross a 1|2|1.) So r4c1-3 is white.

The right 5 could fit in a couple places because the 2s could be at an end of the 5 (thus avoiding the 1|2|1), so we can't rule out anything on the right side.

But look in the middle. In c7-13 we have 1|2|1|2|1|2|1. The 1|2 in c7-8 could be part of the left 5 with no conflict. The 2|1 in c12-13 could be part of the right 5 with no conflict. but the 1|2|1 in c9-11 cannot be part of either 5 without causing a block of 1 in r3 or r5. Thus r4c9-11 are white.

That places the left 5 and then line logic to finish.

Found to be logically solvable by gator.

Agreed on the logic. Nice puzzle.

Lots of fun to solve.

Goto next topic

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