The aim for both players is to make a straight line of four own pieces; the line can be vertical, horizontal or diagonal. Before starting, players decide randomly which of them will be player 1; moves are made alternatively, one by turn. Moves entails in placing new pieces on the board; placing them down on the last row, or piling up on the last piece introduced in the same column. The winner is the first player who gets a straight line made with four own pieces and no gaps between them.