When the board fills up, is the game a draw, or is it a win for the first player? If it is a draw, the second player can simply mirror what the first player does (same thing on other side of board) and never get Four in a row (only the first player can). If it is a win for the first player, it should be specified in the rules. Thanks!
(hide) If you want to find an opponent with similar playing skills to your own look in the Ratings page of the type of game you want and find a player with a similar BKR. (pauloaguia) (show all tips)