Don't fool yourself! You must play your highest card in the round, but you only score if you bluff, or catch who is bluffing... or who made a mistake, as the numbers in this game tend to want to change value! Pay close attention not to get caught in the deception.
Each round each player needs to show the higher card of a hand of three. But this can be a bluff.
Each player simultaneously can check if another is bluffing or not, you get points for catching someone bluff, however they score points if they were telling the truth. If nobody bluffed the value of a successful bluff increase.
Number in constant change: every round some number can exchange value with another, become the higher or lower, add with another.. so the player needs to pay attention in order to not get confused.
The game ends when someone scores 12 or more points.