Furiten: Difference between revisions

Furiten (view source)

Revision as of 06:55, 28 June 2024

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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.]]
 While a player's hand is in '''furiten''' {{kana|振聴}}, the player cannot declare a win on another player's [[ron|discard]] (i.e., they cannot [[ron]]). They are still allowed to win with their own draw ([[tsumo]]), assuming the hand is valid.
-The most common form of furiten is with discards: if any tile a player's hand could have won off had been discarded before, it is furiten. A hand may also enter furiten when a player skips a win.
+The most common cause of furiten is with discards: if any tile a player's hand could have won off had been discarded before, it is furiten. A hand may also enter furiten when a player skips a win.
 This rule is often used for [[defense]] purposes to determine [[genbutsu|safe tiles]]: any tile a player discards is 100% safe against that player.
 == Rule overview ==
+While in furiten, the hand is unable to call ron upon a discard. However, it can still win via self-draw, assuming the hand has valid yaku.
 A hand in [[tenpai]] is in furiten in any of the following scenarios:
-* '''Discard furiten:''' When at least one winning tile had been discarded before, the hand enters furiten. This applies even if the hand couldn't actually win if it got that tile (due to lacking [[yaku]]). A  does not have to be in your discard pile to invoke furiten; if an opponent [[naki|called]] a tile, it will still trigger fuirten.
+* When at least one of the hand's current winning tiles have been discarded before, the hand enters furiten. A tile does not have to be in your discard pile to invoke furiten; if an opponent [[naki|called]] your discarded tile, said tile will still trigger furiten.
-* '''Permanent furiten:''' After declaring [[riichi]], if the first winning tile is skipped, the hand permanently enters furiten.
+* After declaring [[riichi]], if the first winning tile is skipped, the hand permanently enters furiten.
-* '''Temporary furiten:''' When not in riichi, when a winning tile is skipped, the hand enters temporary furiten. This furiten lasts until the player's next draw.
+* When not in riichi, when a winning tile is skipped, the hand enters temporary furiten. This furiten lasts until the player's next draw.
-While in furiten, the hand is unable to call ron upon a discard. However, it is still winnable via self-draw, assuming the hand has valid yaku.
+A "winning tile" is a tile that could complete the "4 groups + 1 pair" winning shape, even if the hand couldn't actually win because it would lack yaku.
 Note: If a hand is in furiten, it is unable to win off ''any'' player's discard, regardless of which tile caused the furiten. For example, if your hand is waiting to win with 2p and 5p, and you had discarded 2p before, you are unable to win off an opponent's 5p.
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 You can tell what tiles a player discarded by looking at their discard pile, and looking at the rotated tiles in other players' tile calls. This leads to the most basic strategy to avoid dealing into a player's hand: tiles they have already discarded are guaranteed to be safe against a ron call from that player.
-It is important to bear furiten in mind when developing a hand. Frequently, if a hand gets to tenpai and is furiten, then the hand was inefficiently developed. This is not always the case, however, as a player can make a correct decision but still be in furiten.
+It is important to bear furiten in mind when developing a hand. Frequently, if a hand gets to tenpai and is furiten, the hand was inefficiently developed. This is not always the case, however, as a player can make a correct decision but still be in furiten.
-A common reason for furiten is when a player is in tenpai with an open hand, but it has no guaranteed yaku. In these cases, the hand will only gain yaku if it draws a certain winning tile. If a different winning tile is drawn, the hand will have no yaku, and is thus forced to discard its own winning tile - entering furiten. This most commonly occurs with:
+"[[Atozuke]]" - or when a player is in tenpai, but has no guaranteed yaku - is a common reason for furiten. In these cases, the hand will only gain yaku if it draws a certain winning tile. If a different winning tile is drawn, the hand will have no yaku, and is thus forced to discard its own winning tile - entering furiten. This most commonly occurs with:
 *A [[shanpon]] wait, with one tile completing a [[yakuhai]] triplet, and the other having no yaku.
 *A [[ryanmen]] wait on 14 or 69 on a hand that would otherwise complete [[tanyao]].
-These type of cases are known as [[atozuke]].
 Finally, a player considering a [[daburu riichi|double riichi]] should carefully inspect their hand before discarding; if they had a complete hand to begin with, then being in furiten will add insult to the injury of having [[http://osamuko.com/delicious-riichi-button-must-click-it/ passed]] on a [[tenhou and chiihou|tenhou or chiihou tsumo]].