DOUBLE 9 DOMINOES RULES

The tiles and the deal

Cuban dominoes uses the double-nine set: every pair of numbers from 0–0 up to 9–9, which comes to 55 tiles. Four players each draw 10 tiles, so 40 tiles go into hands and the remaining 15 stay face down and out of play. There is no boneyard to draw from — once the hand starts, you play only what you were dealt.

If any player is dealt five or more doubles, the hand is thrown in and everyone is dealt again. It is a house rule that keeps a single lucky hand from deciding the game, and this game applies it automatically.

Four players, two partnerships

Cuban dominoes is a partnership game. You play with the person sitting opposite you, against the two players on your left and right. In this game South and North are one team, West and East are the other. Points are scored by the team, never by the individual, so helping your partner get rid of tiles matters as much as unloading your own.

Play runs counterclockwise around the table, and partners never sit next to each other.

Who opens the first hand

On the first hand the opener is drawn at random from the four seats. Holding the double-nine means nothing here — the 9–9 does not decide the opening. The draw is made by the server and stored with the game, so everyone at the table sees the same opening player.

Whoever opens may lead with any tile in their hand. If that seat is a bot or a disconnected player and their partner is human, the opening passes to the partner so the table isn't left waiting.

After that, the winner of a hand opens the next one; if a hand ends blocked, the same player opens again.

Legal plays

The tiles form one chain with an open number at each end. On your turn you may add a tile to either end, as long as one of its halves matches the number showing at that end. If a tile fits both ends, you choose which end to use — that choice is often the whole game, because it decides what your opponents can answer.

Doubles are played across the chain in this game but do not change how matching works: a double only ever connects to its own number.

Passing

There is nothing to draw, so if no tile in your hand matches either open end you pass and the turn moves on. Passing here is automatic: when you have no legal tile the game passes for you and everyone sees the PASS sign. You can never pass while holding a playable tile. Passing is public information: good players (and the harder bots here) remember which numbers you passed on and starve you of them later.

Trancado — the blocked hand

When all four players pass in a row, the hand is trancado(blocked/locked). Nobody has run out of tiles, so the hand is decided by pips:

• Add up the spots left in each player's hand. The player with the lowest total wins the hand for their team.
• That team scores the total pips left in both opponents' hands.
• If the two lowest hands are tied and they belong to opposing teams, the hand is a tie and no points are scored.

Blocking the game on purpose is a legitimate tactic: if your side is holding light tiles, locking the table wins you the count.

Scoring and playing to 100

A hand normally ends when someone plays their last tile — that is a domino. Their team scores the sum of all the pips still held by the two opponents. Your partner's leftover tiles never count against you.

Hands continue until a team reaches 100 points, which wins the game. Because a single domino can be worth 40 or more pips against a heavy table, a game can swing in two hands.

A few practical habits

• Get heavy tiles and doubles out early, while both ends are still flexible.
• Count what has been played. In a 55-tile set with 15 tiles buried, knowing a number is exhausted is worth more than a lucky draw would be.
• Watch your partner's passes — that number is the one to keep open for them.
• When you are ahead near 100, closing the table is often safer than chasing the domino.

Play a hand

You can practice against three bots or open a private table for friends — no account needed.

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