Kong
A set of four identical tiles. Can include jokers in American Mahjong.
Definition
A kong is a group of four identical tiles, for example, four 2 Dots or four North Winds. Kongs appear in many hands on the NMJL card and can include Joker substitutions in American Mahjong. A kong requires one more tile than a pung, making it harder to complete but often necessary for higher-value hands.
How It Works in Gameplay
Like a pung, you can build a kong by drawing tiles from the wall or by calling a discard when you already hold three matching tiles (or a combination with Jokers). Exposing a kong reveals significant information, four of the same tile is a strong signal about your target hand. Some players delay exposing a kong until they are confident about their hand direction. Kongs are common in categories like "2468" and "Consecutive Run" on the NMJL card.
Example
You hold three 6 Bams and a Joker in your concealed hand. You could already form a kong, but you keep it concealed to avoid tipping off your opponents. Two turns later, you draw a fourth natural 6 Bam from the wall, so you swap the Joker out of the group and use it elsewhere in your hand, maximizing your flexibility.
Kong vs Pung and Quint
A kong sits in the middle of the matching-set family on the NMJL card:
- A pung is three identical tiles.
- A kong is four identical tiles.
- A quint is five identical tiles, which always requires at least one Joker.
- A sextet is six identical tiles, the rarest grouping of all.
The more tiles a group needs, the harder it is to complete and the more a Joker matters. Kongs strike a practical balance: common enough to appear in many hands, but valuable enough to anchor higher-scoring patterns.
When to Expose a Kong
Exposing a kong tells the table exactly which tile you are collecting, so timing matters. Expose early and opponents will stop discarding that tile and may shift their own hands defensively. Many experienced players hold a concealed kong as long as they can, especially when a Joker is involved, and expose only once they are committed to a hand and need the call to keep moving. A concealed kong also keeps more of your hand hidden, which is worth extra points in concealed-hand categories.
A useful habit: before you call a discard to make a kong, glance at the card and confirm the hand you want actually uses a kong of that tile and not just a pung. Calling for a fourth tile you do not need locks you out of exposures you might have wanted later.
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