From Beginning, the black stone and white stone be made moves alternately. The opening of a game (first 4 moves), when it is your turn to move, you have two ways of choice, either one move of turn to color or couple moves (a black & a white). If you make one move then your opponent has to turn to another color stone. If you make couple moves, your opponent can swap right (choice color). From 6th move the Black and White will be finalize, until end the game.