You can bluff with as many as four cards, but the fewer cards you play when bluffing, the more believable the bluff will be, as it would be unlikely to have all four 2s in your hand. Bluffing with a number of cards higher than one is riskier, but the payoff is greater because you get rid of more cards.
After the challenge is settled, the next player takes his/her turn with the next rank of cards.
Passing is the safer option if a player doesn’t have any cards that match the round’s rank, but bluffing will get rid of his/her cards faster. You can bluff even if you have a card of the round’s rank. This could be a risky but effective strategy if, for instance, you have multiple cards of the round’s rank. The other players will have no reason to suspect you don’t, especially early in the round, and they will be less likely to call bluff. You can then on later turns use the actual cards that match the rank, which players will be more likely to incorrectly call bluff on.
If everyone passes, the pile is discarded without revealing the cards, and the player who passed last starts a new round. If a player is challenged, the player who wins the challenge starts the next round.
Passing is the safer option if a player doesn’t have any cards that match the round’s rank, but bluffing will get rid of his/her cards faster. Even if you have a card that matches the round’s rank, you can bluff, and play a different card. This can be an effective strategy because the other player will have no reason to believe you don’t have a card that matches the rank if s/he doesn’t have all the cards of that rank in their hand. Then you can go on to play more of your cards by later using cards of the actual rank.
A player on their last card cannot be “forced. "
If both players pass, the pile is discarded without revealing the cards, and the player who passed last starts a new round. If a player is challenged, the player who wins the challenge starts the next round.