Tetrano is a two player game. Each player successively puts a ring on the game board in order to create a four-ring series of a color. This series can be: - concentric : 4 rings of different sizes are placed in the same square, - or linear : 4 rings of the same size, or arranged in an ascending or a descending order of size, are placed on a line, a column or a diagonal. The game ends when one of the players succeeds in creating a four-ring series in the color he chose.To play a ring, drag and drop it to the square in which you aim to put this ring. Have fun!