Bluff

Overview

Bluff is a fast, social card game of claims and lies for four players, played with a single deck. The game travels under different names: Cheat in Britain, Bullshit or BS in America, I Doubt It in most card books, and Bluff or 420 in India. The rules are the same wherever you learned it; only the name changes. You play cards face down while claiming a rank, and the claimed rank advances around the table. When you suspect the last player lied, tap Call Bluff to expose them.

If the player was bluffing, they take the entire pile. If their claim was truthful, the penalty falls on you instead.

The basic rules are simple, but the interesting part of Bluff is deciding when to trust another player’s claim and when to challenge it. Sometimes the safest move is to tell the truth. Sometimes you need to put down cards that do not match the claimed rank and hope nobody calls you out.

How to play

1. Select one or more cards from your hand and play them face down.
2. Make your claim, stating that the cards you submitted match the current rank.
3. Tell the truth or bluff. You do not have to actually hold the claimed rank.
4. Or pass. You can always pass instead of playing. The turn moves on and the rank still advances.
5. Call bluff on the previous player’s claim when you think they are lying.
6. Empty your hand before the other three players, and survive the challenge that follows.

You can play multiple cards during a turn, which creates another decision. Playing several cards helps you shed your hand quickly, but a large submission attracts attention. A single card is easier to believe, but it only removes one card. The right choice depends on your hand, the current rank, and how closely the other players are watching you.

The rank marches on

The required rank moves up by one every single turn — whether cards were played or the player passed — and it wraps from Kings back to Aces. Ace, Two, Three, and so on, round and round.

That is worth more than it sounds. You always know exactly which rank you will be asked for on your next turn, and the one after that. If you are holding three Sevens and Sevens are two turns away, you can pass or dump a single card now and unload honestly when it comes round. Planning two turns ahead is the difference between shedding cards safely and bluffing because you ran out of options.

Calling bluff

When you call bluff, the previous player’s most recent face-down cards are revealed.

• If the claim was false, the player who lied takes the entire pile.
• If the claim was true, the player who called incorrectly takes the entire pile.

Taking the pile can change the game outright. A player who was one card from finishing can suddenly be holding twenty, while a successful challenge dumps everything back on a bluffer. That makes calling a calculated risk: you need the chance of a lie to be high enough to justify the penalty when you are wrong.

You cannot win on a bluff

Emptying your hand does not win the game on its own. Play stops and your final claim must be challenged before anything else happens — the challenge is not optional.

If that last claim was honest, you win. If it was a bluff, you pick up the entire pile and you are back in the game holding more cards than anyone.

So the endgame inverts the whole strategy. Bluffing is how you shed cards cheaply for most of the game, and it is exactly what you cannot afford on the play that would finish it. Save real cards of a rank you know is coming for your last turn.

Reading the table

The cards are hidden, so information comes from more than your own hand. Watch how many cards players submit, how often they bluff, and whether that changes as their hand shrinks. A player down to a few cards has every reason to take risks.

The pile is evidence too. Only four cards of each rank exist, so if three Queens have already been exposed, a claim of two more is barely possible. That is not proof — but it shifts the odds enough to act on.

Tips and strategy

• Count the rank. Four of each exist. Once you have seen three, a large claim is close to impossible.
• Plan two turns ahead. You know which ranks are coming. Hold honest cards for them.
• Keep a real card back for the finish. A bluff on your last play hands you the whole pile.
• Vary how many you play. If you always play two when honest, opponents will read it.
• Pass instead of bluffing badly. Passing costs a turn; a caught bluff costs the pile.
• Do not call every suspicious claim. A wrong challenge leaves you holding everything.
• Call when the pile is small. Being wrong early is cheap; being wrong late is not.
• Watch short hands. A player close to finishing is the one most likely to be lying, and the one it costs most to catch.

Play against the computer

Bluff is a four-player game, and you play against three computer opponents. Each follows the same rules and will challenge your claims when it thinks you are lying, so you can learn the game and test bluffing strategies without needing three other people.

If you liked Bluff, try Challenge

Challenge is the same idea — play face down, claim a rank, get called out — with two changes that alter how you play it.

It uses two decks, so there are eight of each rank instead of four. A claim of three Kings that would be barely credible in Bluff is unremarkable in Challenge, and the counting that wins you games here matters much less there.

And nobody dictates the rank. In Bluff it marches Ace to King regardless of what anyone holds. In Challenge, whoever opens a round picks the rank and everyone else is locked to it until the round breaks. Bluff hands you a schedule to plan around; Challenge hands you a choice to exploit.