GoBang, also known as GoMoku or 5-in-a-Row, is a traditional oriental game played with black and white stones on a 15x15 GO board. It is a simple game, more like Tic-Tac-Toe than GO. It's relation to GO is similar to that of Checkers to Chess.
game mode：single player or two player
player can retract a false move in single player mode