Obstacle Five / Family
Strange boards変盤
Five in a row, on a board that does not behave: edges that join, and squares you cannot use.
2 games in this family, including Obstacle Five.
Toroidal Five輪王五目Five in a row on a board with no edges: every side joins its opposite.
Obstacle Five石場五目— the one you came fromFive in a row across a board scattered with dead squares and hotspots.