This one emerged from the thread about Mark Steere's game Torus. I
shall call it Donut.
The rules:
Played on a standard rhombus shaped hex board. Each player owns a
pair of edges and the stones of one color as in hex, and alternately
place them on board as in hex.
imagine the rhombus is a torus, so that opposite sides meet.
player 1 wins if a NS loop is formed in his color.
player 2 wins if an EW loop forms in his color.
If either player forms a helix (either R- or L-) with his stones, he
instantaneously wins.
