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Gomoku, also called Five in a Row, is an abstract strategy board game. Black plays first, and players alternate in placing a stone of their color on an empty intersection. The winner is the first player to get an unbroken row of five stones horizontally, vertically, or diagonally.

The goal of Gomoku is Each players' goal is to create an unbroken row of five stones horizontally, vertically, or diagonally. Since the opening player (the one with black stones) has a significant advantage, an alternative ways of opening the game have been created which are supposed to eliminate the advantage of an opening player.