A Go Variant: Go+Hex=Gonnect
The rules of Go apply except that there is no passing and the winner is the first to connect two opposite sides of the board (or to deprive the opponent of legal moves). The game is usually played on a 13x13 board and the pie rule is used.
Tip: you can play it on KGS, easily (except swapping the first move), just set up a 13x13 non-rated game.
Tip2: You can play gonnect at iggamecenter. There is usually someone there who is willing to play.