Gomoku: five stones in a row

Gomoku is a strategic board game played by two opponents on a grid, traditionally 19x19 or 15x15 in modern variations. Players take turns placing black and white stones on the intersections. The objective is to form an unbroken line of five stones in any direction—horizontal, vertical, or diagonal—before the opponent does. Originating in ancient China over two millennia ago, this classic game has evolved with slight rule variations. Today, it enjoys global popularity, with organized tournaments held worldwide. Its simple yet deep gameplay makes it a timeless test of strategy and foresight.