Furiten

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Furiten, meaning sacred discard, is a hand status. A player in tenpai is furiten if he could win on an earlier self-discarded tile, or if he has recently ignored to win by ron. Players in furiten may still win by tsumo, but not by ron.

Rules

A player with a tenpai hand is furiten if at least one of the conditions below applies.

Players in furiten may not win by ron, even if they have a yaku. Declaring ron while in furiten is penalized with a chombo payment.

Players in furiten may still win by tsumo.

Discard-based furiten

A player is furiten if in his discard pile, there is a copy of any of his hand-completing tiles. It does not matter whether this tile would have provided a yaku or not. Tiles turned sideways within open melds are considered part of their discarder's discard pile.

As long as the player has not declared riichi, they can get out of furiten by altering their hand and waiting on other tiles.

Tile-7m.pngTile-7m.pngTile-3p.pngTile-4p.pngTile-5p.pngTile-6p.pngTile-7p.pngTile-6s.pngTile-7s.pngTile-8s.pngTile-7z.pngTile-7z.pngTile-7z.png, waiting on Tile-2p.png, Tile-5p.png, or Tile-8p.png

This hand has three different tiles to wait on. If the player has a 2-pin in his own discard pile, he is furiten and may not win by ron on any tile. Even if a 5-pin or 8-pin gets discarded by an opponent, he may not call ron.

Permanent furiten

A riichi declarer is furiten when he has missed a chance to call ron against a winning tile after his riichi declaration. This may have been a discarded tile, or a tile used to extend a minkou to a shominkan.

The player will remain furiten for the rest of the hand. He cannot call ron on any tile, even if it is a different tile than the ignored one. This rule requires knowledge of all own possible waits.

Temporary furiten

(ignoring ronpai when not in riichi, some rules end this on drawing, others end this on drawing and on tile call)

Strategy

Furiten is often used to defend against opponents. By discarding tiles that are also visible in an opponent's discard pile, a player can avoid a ron call by that opponent.