Hex is a two-person board game where players try to connect opposite sides of a hexagonal grid. It was invented in 1942 by Danish mathematician Piet Hein, who wrote about it in the Danish newspaper Politiken. Hex is interesting because of it's incredible depth/complexity ratio: the rules are extremely simple, yet it has five billion times as many possible positions as chess (when played on an 11x11 board). This high depth means that the game remains difficult for computers to play.
Hex+ is an online client for playing Hex against both friends and strangers.
When it is your turn, click any empty cell to mark it with your color. Try to make a contiguous path connecting your two sides of the board.
There's only one other rule: because blue would be at a disadvantage from moving second, they can choose to swap colors after red picks their opening move.