Gomoku

Gomoku, known as Five in a Row, is a two-player strategy game played on a 15x15 grid. Take turns placing stones on empty board intersections. The black player moves first. Strategize to form an unbroken line of exactly five stones horizontally, vertically, or diagonally. Once placed, stones cannot be moved. Claim victory by completing your connection. An overline of six or more stones does not trigger a win.