>>14144225(Reading rows left-to-right, and reading columns top to bottom):
Row1. reveals that the horizontal line is behind the opaque square.
Row2. reveals that the small circle is in front of the vertical line
Col1. reveals that the small circle is in front of the horizontal line.
Col2. I think reveals that there was a shape we were missing all along (or 2.) That shape is the two rounded-circle-slices on top of (and below) the square. (Opaque imo)
Because, the horizontal line appears in front of the square, but disappears behind those tricky little slices above and below the square.
Basically, picture@(row1,col2) was not just a square but a square far away, and two-rounded-circle-slices closer to you.
Now we have the order (from lowest/back-most layer to highest/front-most):
>horizontal line>square>vertical line>top-and-bottom-circle-slices AND circle(the circle and slices don't get in the way of each other so I don't really know which would be higher, but they're definitely above everything else)
And yes, I definitely feel uncomfortable that (row1,col2) has two "layers" (slices and square). I really want a better interpretation. But I chose 8. Someone else try