The WLIW documentary “New York: The Way It Was (The Bronx)” has brief footage of a 9-boxed skully board. As I recall, it was like the board in the rules I’ve written, but it had 1-2-3-4 in the corners, 5-6-7-8 along the edges (between the corners), and 9 in dead center, surrounded by some circular thing which, I presume, serves as the skull.
If you have any further insight into “9-box Skully” (my new term!), please post them here!
-Hugh M. McNally
Skully Central discussion moderator