Have more discs of your color than your opponent when the game ends. Black always moves first.
Congratulations!
Have more discs of your color than your opponent when the game ends. The game ends when neither player can make a valid move.
You outflank opponent discs when you place a disc such that one or more opponent discs are in a straight line (horizontal, vertical, or diagonal) between your new disc and another disc of your color.
The game ends when neither player can make a valid move. Count the discs - the player with more discs wins!