1. three modes , easy, medium,hard
2.Gomoku五子棋 (Five in a Row) is a strategy board game played on a Go board. The first player to get an unbroken row of five stones wins the game.
3. using 15×15 grid intersections. Players alternate turns placing a stone of their color on an empty intersection. The winner is the first player to form an unbroken chain of five stones horizontally, vertically, or diagonally.