Very interesting. I see no mention of it in Pritchard's Encyclopedias. It has nothing to do with Byzantine chess which was played on the spaces, not on the intersections. The closest similar game I know is Circum Morum or Jabberwocky chess invented by V.R.Parton in 1961. But this one was more complex with 5 concentric circles and 61 positions. Maybe your game has been inspired by Parton's one.
Very interesting. I see no mention of it in Pritchard's Encyclopedias. It has nothing to do with Byzantine chess which was played on the spaces, not on the intersections. The closest similar game I know is Circum Morum or Jabberwocky chess invented by V.R.Parton in 1961. But this one was more complex with 5 concentric circles and 61 positions. Maybe your game has been inspired by Parton's one.