Conecta 4

The goal is to align four Connect 4 chips on a board consisting of six rows and seven columns. Each player has 21 tokens of one color (usually red or yellow). In turn, players must enter a tab column they prefer (provided it is not complete) and it will fall to the lowest position. Win the game to get the first line four consecutive cards of the same color in horizontal, vertical or diagonal. If all columns are full but no one has made a valid row, there is a tie.