Big two (also known as deuces, capsa, pusoy dos, and dai di, among other names) is a shedding-type card game of Cantonese origin. The game is popular in East Asia and Southeast Asia, especially throughout mainland China, Hong Kong, Vietnam, Macau, Taiwan, Indonesia, the Philippines, Malaysia and Singapore. It is played both casually and as a gambling game.

Big two is usually played with two to four players. It is played with a standard 52-card deck. The objective of the game is to be the first to play off all of one's cards.

The game has many names, including big deuce and top dog. In Cantonese, it is 鋤大弟 (chor dai di, Jyutping: co⁴ daai⁶ di²). In Hokkien, it is 十三 (cap sa, Pe̍h-ōe-jī: cha̍p-saⁿ, lit.'thirteen'), a name which is also commonly used in Indonesia. In Malta, it is often referred to as ciniza ("Chinese") or giappuniza ("Japanese"). A variant of the game is called pusoy dos in Filipino and chikicha in other Philippine languages.^[1][2]

One by one, the entire 52-card deck is dealt out to all players. If there are leftover cards, they are given to the player holding the 3♦. Joker cards are not used.

At the beginning of each game, the player with the 3♦ starts by playing it singly or as part of a combination (see § Combinations). Each subsequent player must play a higher-ranked card or combination than the one before with the same number of cards. Players may pass their turn, meaning they choose not to play or they do not have the cards to make a play.

When all but one of the players have passed in succession, the turn is over and cards that were played remain in a waste-pile. A new turn is started with all players, initiated by the player who played the final combination.

The game ends when one player has played all of the cards in their hand; this player is the winner. Scores can be tabulated according to the method laid out in § Scoring.

Cards can be played as singles or in groups of 2, 3, or 5.

The value of a card is first determined by its rank, in the following order, from highest to lowest: 2, Ace (A), King (K), Queen (Q), Jack (J), 10, 9, 8, 7, 6, 5, 4, 3.

The suit functions as a tie-breaker. The order of suits, from highest to lowest, is:

• ♠ Spades
• ♥ Hearts
• ♣ Clubs
• ♦ Diamonds

Thus, the highest-ranked card is 2♠, and the lowest-ranked card is 3♦.

The following are the valid trick combinations. The ranking of a combination is based on its highest ranking card, unless stated.

• Singles: Any individual card.
• Pairs: Two cards of the same rank.
• Triples: Three cards of the same rank.
• Five-card combinations, ranked lowest to highest:
  • Straight: Any five consecutive cards, but not all of the same suit.
  • Flush: Any five cards of the same suit, but not in sequence.
  • Full house: Three cards of the same rank and two cards of another matching rank. Ranking is based on the highest ranking card of the triple.
  • Four-of-a-kind: Four cards of the same rank, plus one additional card. Ranking is based on the highest ranking card of the four-of-a-kind.
  • Straight flush: Five consecutive cards of the same suit.

The most common version of scoring is as follows.

For each player with cards, each card is 1 point, unless they have 10 or more cards, in which case each card is 2 points. These points are paid to the winner. For example, if North wins, and East, West, and South respectively still had 3, 11, and 8 cards remaining, then East scores −3, West scores −22, South scores −8, and North scores +33.

Any unused 2s, four-of-a-kinds, or straight flushes doubles the points paid to the winner. If the winner ends the game by playing a combination with a 2, a four-of-a-kind, or a straight flush, points are also doubled. For example: North wins with a 2 as their last card played; East, West, and South respectively still had 3, 9, and 8 cards left. West had an unused straight flush, and South had an unused 2; East would score −6, West would score −36, South would score −32, and North would score +74.

• Chinese poker
• Dou di zhu (similar rules, played with three players)
• Tiến lên (a similar Vietnamese game)
• Gnau
• Zi pai
• Four color cards
• Daguai luzi, also known as wild escape or the joker's way
• Balatro (video game)