Tumbling Down is an abstract-strategy game played on a checker board with 58 pieces in two colors.Gameplay involves moving stacks of pieces by tumbling them in one direction. Tumbled stacks leave one piece of the stack on top of anything on a square for each square it travels in that direction. The object is to capture your opponent's largest stack.Online Play boardspace.net realtime against live opponents or robots Richard's Play-By-eMail Server (PBEM) - BoardGameGeek