The first player may choose any combination of cards to play, and must declare the cards played, for example: …
The first player may choose any combination of cards to play, and must declare the cards played, for example: "2×3".
When declaring, a player may bluff by announcing a different card value, or tell the truth to avoid being challenged.
On their turn, the next player may choose to Follow (continue with the declared card value), or Challenge (call out a bluff) and take the penalty to end the current sequence and take the lead for the next round.