Happy Sunday. :)
This one went through a few twists and turns before winding up in its current form, but I'm fuzzy on the details. In keeping with SSS tradition it's intended to be more light exercise than intense workout, although I don't pretend to be a great judge of that.
Thanks to test solvers Abide and Wendy Walker, who as usual made it better. And of course to Joe Ross for tech support. Nudges later today, which I imagine will get any stragglers over the line.
Nudges:
Can you place the starred entries?
Each is a member of a distinct set
How do they relate to other members of their sets? Remember the title.
What's at the other extreme in each case?
I don't see any of those other places in the [i]grid[/i]...