A chess variant board to accommodates three players, without compromising ANY of the rules, strategies, or competitive challenges. There are only a few changes that must be followed to maintain order where the teams border each other. More here.
There's also the "vertical" version of chess.It includes a "last move" marker hung around a recently promoted pawn-turned-Queen signals to an opponent that without an equally crafty counter, the game will end soon. It's only $300.
From Hammacher Schlemmer.
And remember, there is always the list of the five greatest toys of all time (from Wired via kottke).
- the Stick
- the Box
- the Cardboard Tube