These games are for two people; one plays black
stones or crosses (X), second plays white stones or nougths (O).
Game always starts with a cross. The size of board is 15x15 or
19x19.
The basic "completely free" rules of all five-in-a-row games:
Rule 1. Play alternates between one player who
starts the game (called Black because he is playing with black
stones in the intersections of a board and another player
(usually called White because he is playing with white stones).
Rule 2. The first player to get an unbroken
line of five stones (marks) whether vertically, horizontally, or
diagonally, wins the game.
