Kan

Kan

Kan (槓) is a meld consisting of four identical tiles, representing the highest-order grouping in mahjong. When a player declares a kan, an additional dora indicator is revealed, providing a significant advantage.

Kan in detail

A kan is fundamentally different from other melds because it uses four tiles instead of three. In standard mahjong, melds typically consist of three tiles, either a pung (three identical tiles) or a chow (three consecutive tiles in the same suit). A kan takes this concept further by adding a fourth identical tile to create a complete set of four.

There are three distinct types of kan, each with different strategic implications and declaration methods:

Ankan (暗槓 - Concealed Kan) An ankan is declared when a player melds four identical tiles from their own hand without exposing them to other players. The four tiles are set aside on the table, conventionally with the two end tiles face down. Everyone can see what the ankan is; it counts as concealed only for scoring purposes, so it keeps your hand closed. Ankan is typically the most powerful form of kan strategically.

Daiminkan (大明槓 - Open Kan) A daiminkan occurs when a player holds three identical tiles concealed in hand and claims the fourth from another player’s discard, which immediately opens the hand. The kan is displayed openly on the table. While this type of kan is less mysterious than ankan, it still provides the dora advantage and allows players to form complete sets more efficiently.

Shouminkan (小明槓 - Added Kan) A shouminkan happens when a player adds a fourth tile to an existing open pung (three identical tiles already melded on the table). This is declared by taking a tile from their hand and adding it to the visible pung. Like daiminkan, this is an open declaration, but it represents an evolution of a previously declared meld.

The Dora Advantage

One of the most significant aspects of kan is that declaring one reveals an additional dora indicator. In mahjong, dora are bonus tiles that increase a hand’s point value. When a kan is declared, the next tile beside the current dora indicator in the dead wall is flipped to reveal a new dora indicator, potentially creating additional dora tiles in players’ hands. This mechanic makes kan declarations strategically important beyond simply completing a four-tile meld.

Seeing Kan in play

Consider a player holding three 5-bamboo tiles in their hand. When they draw a fourth 5-bamboo from the wall, they can declare an ankan. The four tiles are kept concealed in their hand, and a new dora indicator is revealed. Later in the same hand, a different player who earlier called a pon of 7-circle tiles draws the fourth 7-circle and declares a shouminkan by adding the drawn tile to their existing pon.

Strategic Considerations

Declaring a kan is not always advantageous. While the additional dora can increase hand value, it also consumes tiles that might otherwise be used for melds, and it reveals information to opponents about the declaring player’s hand composition. Players must balance the potential point gains from dora against the strategic costs of revealing their intentions.