• The game starts on an empty board. Players move in turn to place one stone on an empty cell. Red moves first. The second player is on his first move entitled to a swap.
  
  The swap option can be found under the 'choose' button. It results in a switch of color of the first stone.
• The object is to form a connected path of your stones between the opposing sides of the board marked by your colors.

Since a red and a white connection are mutually exclusive, draws are impossible. John Nash has in fact provided us with a non-constructive proof that (barring a pie) the game is a determined win for the first player. However it's far from easy to demonstrate this on any sufficiently large board.