Gomoku

Connect exactly 5 of the same stones in a row (horizontally, vertically or diagonally).

Set your stone on any empty spot of the board. Aim to make a line of five stones in a line, either sideways, vertically, or diagonally. Block your rival from achieving their own sequence of 5. Switch putting stones with your rival until one player succeeds in forming a line of 5. Keep in mind that the match concludes immediately when a row of 5 is made, with no need to fill the entire board.