Deal all cards evenly to the players
Choose a starting player
The first player places one or more cards face down and says the rank they are playing
The declared rank must follow the turn order of ranks
The next player must either play the next rank in order or call BS if they think the claim is false
If BS is called, reveal the played cards
If the player lied, they take the entire discard pile
If the player told the truth, the challenger takes the entire discard pile
Play continues clockwise
A player may play multiple cards face down if they are claiming the same rank
A player wins by getting rid of all their cards first