Jogo da Velha

Game rules: I think everyone knows play game old but if you have spent your life in a cave or on another planet, here follow the rules of the game: The board is composed of three rows and three columns. Two players choose the markings with which they wish to play (usually a 'circle' and 'crux') and will alternately filling the empty gaps of the board. The goal is to put three circles or crux online, be it vertical, horizontal or diagonal, while trying to prevent your opponent from doing the same. If one of the players can put three line elements, it is declared the winner. But if any such get done, it is declared a draw ... when it happens in Brazil, it is said that the game "gave old."