symetry

Too much guessing.

Interesting pattern. Using the title there are only a couple of logical answers. Not too tough to guess I got it on the second go.

I went through at least five different valid solutions before discovering the right one. If it helps, there is an X that runs through the entire puzzle.

Once you run out of logical placements, complete the partial diagonals. the remaining pixels form three parallel lines in each corner.

Pas trouvé, plusieurs solutions