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[[Image:Furiten.png|right|thumb|250px|[http://tenhou.net/0/?log=2012110112gm-0009-7447-14ec5c8d&tw=0&ts=4 Baiman tenpai], in furiten due to 9-sou in discard. Ron cannot be called here.]] | [[Image:Furiten.png|right|thumb|250px|[http://tenhou.net/0/?log=2012110112gm-0009-7447-14ec5c8d&tw=0&ts=4 Baiman tenpai], in furiten due to 9-sou in discard. Ron cannot be called here.]] | ||
'''Furiten''' {{kana|振聴}}, meaning '''sacred discard''', is a particular rule associated with the tile discards. Basically, the player in [[Tenpai|tenpai]] is furiten if winning tiles are present in one's own discard pile or | '''Furiten''' {{kana|振聴}}, meaning '''sacred discard''', is a particular rule associated with the tile discards. Basically, the player in [[Tenpai|tenpai]] is furiten if winning tiles are present in one's own discard pile or, in certain conditions, another player's discard pile or [[shouminkan]]. Players in furiten may still win by [[tsumo]], but not by [[ron]]. | ||
Unlike many other mahjong variations, the [[discard pile]] for Japanese mahjong is specifically arranged in front of players. The orderly discards help enforce the '''furiten rule''', by keeping track of discarded tiles. [[naki|Tile calls]] have specific arrangements to point the source of these discarded tiles, so that they do not allow a loophole to furiten. For every discard, the '''furiten rule''' applies when appropriate. | Unlike many other mahjong variations, the [[discard pile]] for Japanese mahjong is specifically arranged in front of players. The orderly discards help enforce the '''furiten rule''', by keeping track of discarded tiles. [[naki|Tile calls]] have specific arrangements to point the source of these discarded tiles, so that they do not allow a loophole to furiten. For every discard, the '''furiten rule''' applies when appropriate. | ||
In all cases, the furiten rule requires a player to be aware of all of their [[machi|tile waits]]. If a player is [[tenpai]] but does not realize all of their possible waits, they may not be aware that they are furiten and, as a result, call an illegal win. This is especially true of a player who has called [[riichi]], because they can be furiten off of anyone's discard. | |||
== The rule == | == The rule == | ||
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== Causes == | == Causes == | ||
When a player has called a win, via the call for ron, their hand should be checked for furiten. If the player is found to be furiten, then the win is invalid and the penalty for chombo is enforced. For games played via the computer, players are usually denied the ability to declare ron in the first place. | |||
=== Discard-based furiten === | === Discard-based furiten === | ||
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:{{#mjt:77m 34567p 678s 777z}}, waiting on {{#mjt:2p}}, {{#mjt:5p}}, or {{#mjt:8p}} | :{{#mjt:77m 34567p 678s 777z}}, waiting on {{#mjt:2p}}, {{#mjt:5p}}, or {{#mjt:8p}} | ||
This hand waits on three different tiles. If the player has a 2-pin | This hand waits on three different tiles. If the player has a 2-pin their discard pile, then the hand is in furiten and may not win by ron on any tile. Even if a 5-pin or 8-pin gets discarded by an opponent, ron may not be called in this instance. | ||
=== Permanent furiten during riichi === | === Permanent furiten during riichi === | ||
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A riichi declarer may ignore a winning tile and not call ron. The ignored tile may have been a discarded tile or a [[Chankan|tile used to extend a minkou to a shominkan]]. After ignoring a winning tile, the riichi declarer is permanently furiten for the rest of the hand. Therefore, it is advised for any player declaring riichi to call ron, at the first instance of a winning tile. Otherwise, a win via [[mentsumo|tsumo]] becomes the only option. | A riichi declarer may ignore a winning tile and not call ron. The ignored tile may have been a discarded tile or a [[Chankan|tile used to extend a minkou to a shominkan]]. After ignoring a winning tile, the riichi declarer is permanently furiten for the rest of the hand. Therefore, it is advised for any player declaring riichi to call ron, at the first instance of a winning tile. Otherwise, a win via [[mentsumo|tsumo]] becomes the only option. | ||
The furiten rule emphasizes that all tiles discarded by any player after the riichi declaration are deemed [[genbutsu|safe tiles]], along with the player's own discards. For this reason, the tile upon the riichi declaration is turned sideways to indicate the timing of the call. Riichi declarers may not decline a ron against one player and expect to declare ron against another. Even if a winning tile different from the ignored one appears, the player may not call ron | The furiten rule emphasizes that all tiles discarded by any player after the riichi declaration are deemed [[genbutsu|safe tiles]], along with the player's own discards. For this reason, the tile upon the riichi declaration is turned sideways to indicate the timing of the call. Riichi declarers may not decline a ron against one player and expect to declare ron against another. Even if a winning tile different from the ignored one appears, the player may not call ron. | ||
=== Temporary furiten === | === Temporary furiten === | ||
[[Image:TempFuriten.png|thumb|right|250px|Ron declined, so [http://tenhou.net/0/?log=2014022617gm-0089-0000-ee8c6631&tw=2&ts=11 temporary furiten invoked] until the next own's tile draw.]] | [[Image:TempFuriten.png|thumb|right|250px|Ron declined, so [http://tenhou.net/0/?log=2014022617gm-0089-0000-ee8c6631&tw=2&ts=11 temporary furiten invoked] until the next own's tile draw.]] | ||
Any player in tenpai | Any player in tenpai has the option to ignore winning tiles. By declining a call for ron, the player then becomes temporarily furiten until their next discard. In some plays, this may be a valid option in order to achieve a higher scoring hand or to target a specific player. | ||
The furiten rule does not consider [[yaku]]. Sometimes, a hand can be completed with several tiles, but only some of them provide a yaku, others would produce a yakuless hand. If a yakuless tile appears, it must be ignored, because a winning hand must contain a yaku. The player must remain temporarily furiten. | The furiten rule does not consider [[yaku]]. Sometimes, a hand can be completed with several tiles, but only some of them provide a yaku, others would produce a yakuless hand. If a yakuless tile appears, it must be ignored, because a winning hand must contain a yaku. The player must remain temporarily furiten until their next turn, even if a potential winning tile appears. | ||
This rule makes it harder to target a specific player with ron, or to ignore a winning tile of lesser value and hope for a tile | This rule makes it harder to target a specific player with ron, or to ignore a winning tile of [[yasume|lesser value]] and hope for a more valuable tile. Sometimes, a player simply needs a specific win condition in order to attain a certain result, like [[Gyakuten|passing another player]]. Win conditions that do not meet certain expectations may end up being ignored.ile giving more value | ||
Some may [[Rule variations#Furiten|vary the rules]] on temporary furiten with regards the timing of its cancellation | Some rulesets may [[Rule variations#Furiten|vary the rules]] on temporary furiten with regards the timing of its cancellation, where a [[naki|tile call]] made by another player cancels the temporary furiten state. This is an uncommon variation, however. | ||
== Strategy == | == Strategy == | ||