First conceived and built by me in 1976, with this variation, the left and right sides of a standard board are 'stretched'
around a circle to meet and join. This allows the Rooks to move in a circular fashion and the
Bishops now move spirally; the Queen, as always, is allowed both motions. There is no longer a
left or right border to limit lateral movement, thus allowing rooks and the queen to move in a
full circle.