I used to play Skully as a kid in Queens; there was a board painted on the schoolyard blacktop, but I don’t remember exactly how it was laid out.
What I remember most about skully was making the pieces. We used to tie washer magnets onto the end of a piece of string to fish the bottle caps out of old coke bottle vending machines, and then melt
broken Crayola crayons into them under high intensity lamps and let them harden in order to give them some weight. A good color pattern was considered cool. :^)