Kan strategy

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The mechanics of calling for kan requires some assessment, as risks are involved. In plenty of cases, a kan is a risky move, even though there are potential benefits.

Offense

Under most circumstances, the call for kan is an offensive move. The player gets an extra draw from the rinshanpai and chances for the kandora. If the hand is tenpai, then the hand has a chance for rinshan kaihou.

Defense

A safe place for dangerous tiles is in one's own hand. A call for ankan ensures for all four of a single tile type to remain in the hand. Furthermore, it may be possible to apply kabe making appropriate tiles look safer. For the other kan types, the hand is already open. In the case for daiminkan, the hand is either already open or about to be opened. If the tile to be called is already a safe tile, then it may be a better idea to not call, as three safe tiles are already in possession. For shouminkan or kakan, the added risk of chankan is applied.

Kandora

Extra dora indicators are shown due to calls for kan. This is the kandora. While a player may chance to receive extra dora, an equal chance applies to grant other players the extra dora. With that said, extra consideration must be taken when given the opportunity to call kan.

Riichi

Tile efficiency

External links