Pon

Pon is a fundamental mahjong call that allows a player to claim another player’s discard to complete a triplet (three identical tiles). Unlike chi, which can only be called from the player on your left, pon can be called from any player, making it one of the most frequently used melds in mahjong.

Detailed Explanation

What Pon Accomplishes

When you call pon, you are claiming a tile that another player has just discarded. Combined with two identical tiles already in your hand, this discard completes a triplet—a set of three identical tiles. Once you declare pon and claim the tile, you must immediately expose this meld on the table, making it visible to all players.

How Pon Works

To call pon, you must have exactly two identical tiles in your hand when another player discards the third matching tile. The moment a player discards a tile, you have the opportunity to claim it before the next player draws. You announce “pon” and claim the discard, then arrange your triplet face-up on the table in front of you, typically slightly separated from your hand to indicate it is a meld rather than concealed tiles.

The key advantage of pon over chi is its flexibility: you can claim a discard from any player, not just a specific neighbor. However, this comes with an important consequence—calling pon opens your hand, meaning your melds become visible to all players. This transparency can affect your strategic position, as opponents can see what combinations you’re building toward.

Opening Your Hand

When you call pon, your hand transitions from closed to open. This means:

Your melds must be displayed face-up on the table
Other players can see what tiles you’re collecting
You can still win, but your winning hand will be considered open
In some mahjong variants, open hands have different point values than closed hands

Precedence in Claiming Discards

When a player discards a tile, multiple players might be able to claim it. Pon takes precedence over chi, meaning if one player can pon and another can chi the same discard, the pon call wins and the discard goes to the player who called pon. If multiple players can pon the same tile, the player closest to the discarder in turn order typically has priority, though this varies by ruleset.

Usage Example

Imagine you’re holding two 5-character tiles in your concealed hand. The player opposite you discards a 5-character tile. You immediately call “pon!” and claim that discard. You now arrange all three 5-character tiles face-up on the table in front of you as a meld. Your hand is now open, and you continue playing with one fewer tile in your concealed portion, as you’ve melded three tiles.

Later in the hand, if you draw another 5-character tile, you could potentially upgrade this pon to a kan (four-tile set), though specific rules about kans vary by variant.

Chi — A meld formed by claiming a discard from the player on your left to complete a sequence of three consecutive tiles. Unlike pon, chi can only be called from one specific player.

Kan — A meld of four identical tiles. Can be formed by upgrading an existing pon or by drawing the fourth tile yourself.

Triplet — A set of three identical tiles, which is what pon creates. Triplets are one of two basic meld types in mahjong.

Meld — Any exposed combination of tiles on the table, including pons, chis, and kans. Melds are part of your open hand.

Naki — A Japanese term referring to all types of melds collectively (pon, chi, and kan). It emphasizes the action of “calling” or “taking” discards.

Open Hand — A hand with exposed melds visible on the table. Calling pon opens your hand and affects your scoring potential.

Pon

Definition

Pon