Rainbow

With Rainbow you have to make rainbow sets of six different colors. You make these by playing cards with colors. But you don't just play with your own cards. You also play with the back of the cards of the player opposite you! The back of the opponent's cards may be used by turning them over on the table. You don't know what backs you have yourself. If you accidentally turn over a black card or a color card that is double in the row, you must immediately give cards to your opponent. Whoever collects the most rainbows wins! This is a deceptively simple card game for two players, which you win thanks to some luck, a good strategy and especially a good memory. How far do you dare to go in turning over cards?