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Too much guessing!

If you look at the 9 in the final column, you can discount a number of spots to place it. From there it opens up.

Logical......and funny :-)

Interesting series.

Technically, requires 2D logic, but is a VERY good one for first time, as Teesea points out.

Use temps, "assume" the 9 starts in the top right-most pixel, and go until you get a contradiction, you'll know the square you started from CAN'T be filled in, keep going like that until you can prove something else 8D

A wonderful puzzle, and a very clever little image 8D.

Fully logical. Thank you for the puzzle.

Nice introduction to edge logic and unravels very sequentially from there, thanks!