Gomoku
Gomoku, also called "Five in a Row", is an abstract strategy board game. It is traditionally played with Go pieces (black and white stones) on a Go board, using 15×15 of the 19×19 grid intersections. Because pieces are not moved or removed from the board, Gomoku may also be played as a paper-and-pencil game. The game is known in several countries under different names.
Go (game)
A player may pass on determining that the game offers no further opportunities for profitable play. The game ends when both players pass, and is then scored. For each player, the number of captured stones is subtracted from the number of controlled (surrounded) points in "liberties" or "eyes", and the player with the greater score wins the game. Games may also be won by resignation of the opponent.