Dudo rules — complete game guide

Dudo is played with five hidden dice per player. Each turn you raise the previous bid (a higher quantity, or the same quantity of a higher face) or challenge it with "dudo!". On a challenge all dice are revealed: whoever loses their last die is eliminated, and the last player holding dice wins.

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Objective and players

Three to six players (the table version admits more; online tables have six chairs). Everyone starts with five dice and an opaque cup.

The goal is to be the last player holding at least one die. Every settled challenge costs someone a die, so the game funnels down to a final duel.

The bid: quantity and face

A bid is two numbers: a quantity of dice and a face (the pip value), for example "five threes" — five dice showing 3 anywhere on the table. Traditional names: 1 is the ace (or bala), 2 the tonto, 3 the tren, 4 the cuadra, 5 the quina and 6 the cena.

Each bid must beat the previous one: raise the quantity (any face), or keep the quantity on a higher face. After "four fours" you may bid "five twos" or "four fives", but not "four twos".

On the opening bid of a round the starter may bid anything except aces: a round cannot open on aces unless the starter holds a single die.

The ace is wild

Aces count as whichever face is being bid: a bid of "five fours" is made good by five 4s, or four 4s and an ace, or three 4s and two aces. A bid of aces, however, is only made good by actual aces.

Because an ace serves every face, an aces bid is worth double: switching from a face to aces lets you halve the quantity, rounding up ("eight threes" allows "four aces"; so does "seven threes").

The way back costs double plus one: after "four aces" the next bid is "five aces" or "nine" of any other face.

Dudo: challenging the bid

Instead of raising you may challenge: call "dudo!" and every player reveals their dice.

Count the dice showing the bid face (aces count unless the bid face is ace). If there are at least as many as bid, the bid was true and the challenger loses a die. If there are fewer, the bid was a bluff and the bidder loses a die.

Calza: the exact call

Calza is the fine-touch wager: instead of raising or challenging, you swear that the standing bid is exact — not one die more, not one less.

If the count is exact you win: you regain one lost die (up to five again). If you are wrong, you lose a die. The player who made the bid never loses a die to a calza, right or wrong.

New round and end of the game

After every challenge everyone shakes their dice again, and the next round is opened by the player who lost (or regained) a die. If that player was eliminated, the player to their left opens.

Losing your last die eliminates you. The last player holding dice wins the game; online, chips settle at the end and the winner takes the table.

Frequently asked questions

How many players does Dudo need?

It plays best from 3 players; online tables seat 3 to 6 and bots fill empty seats when needed.

How many dice per player?

Five dice each, hidden in a cup: you only know your own, and every bid is about the total on the table.

What does it mean that aces are wild?

That 1s count as the bid face: "five fives" is made good by five 5s, or any mix of 5s and aces totalling five.

How do I switch a bid to aces?

Halve the quantity, rounding up: after "eight threes" you may bid "four aces"; after "seven threes", "four aces" as well.

How do I go back from aces to a face?

Double plus one: after "three aces" the minimum face bid is "seven"; after "four aces", "nine".

Can a round open with aces?

No: the opening bid may not be aces unless the opening player holds a single die.

What happens when someone calls "dudo"?

Everyone reveals their dice. If the bid quantity exists (counting wild aces) the challenger loses a die; if it falls short, the bidder loses one.

What is calza and what do I gain?

It is swearing the standing bid is exact. If you are right you regain a lost die; if you are wrong you lose one. The bidder never loses a die to a calza.

Who starts the next round?

Whoever lost or regained a die in the challenge; if they were eliminated, the player to their left.

Can I play Dudo online for free?

Yes — at dudo.yeeqia.com you play Dudo online free in your browser, no download and no account to start.