Pinfu: Difference between revisions

Pinfu
Type	Yaku
Kanji	平和
English	All sequences
Value	1 han
Speed	Very fast
Difficulty	Very easy

VisualWikitext

Latest revision as of 08:23, 14 September 2024

Pinfu 「平和」 is a yaku obtained when a closed hand gains no fu from its composition at tenpai. In other words, it would only gain the base 20 fu and fu from the win method. It is worth 1 han and can only be scored by closed hands.

Tile diagram

Winning tile: or

The winning tile completes the last sequence, which is worth 0 fu, making the hand pinfu.

Definition

Main article: Fu

In English, pinfu is sometimes referred to as "all sequences", but that isn't the only requirement for this yaku. There are hands that have all sequences but cannot score pinfu.

The definition of pinfu is a closed hand that has no fu, other than the fu from winning. To score pinfu:

The hand must be closed.
The hand cannot have any triplets or quads - it must be all sequences.
The pair cannot be composed of yakuhai - the pair cannot be the round wind, seat wind, or a dragon.
At tenpai, the hand must have a ryanmen wait. A ryanmen wait is two consecutive tiles waiting to complete either side of sequence, such as {23} or {45}.
- The pair must be complete before reaching tenpai. This means that a "two-sided" nobetan wait does not count, it has to be a wait to complete a sequence.
- Complex waits can also score pinfu if they could be interpreted as a ryanmen wait. A sanmenchan wait, such as {34567}, always counts as a ryanmen wait, because it can be interpreted as {34 + 567} (a ryanmen wait) or {345 + 67} (also a ryanmen wait). Ryantan counts only if you win by completing the sequence (e.g. a wait of {4555} only scores pinfu if you win with 3 or 6).

By avoiding all excess sources of fu, you can score pinfu. Triplets and quads score at least 2 fu each. A yakuhai pair scores 2 fu. A non-ryanmen wait scores 2 fu.

As an exception, pinfu does not score fu from tsumo (win from self draw). Normally, a win by self draw is worth 2 fu. When a hand wins with pinfu, these 2 fu are waived. Thus, a pinfu tsumo is worth 20 fu. Pinfu is allowed to score the 10 fu from winning from a closed ron, though.

Counter examples

The following examples are all "all sequence hands", but they are not pinfu.

Agari:	Every tile group is a sequence, but this hand is open.

Agari:	The pair of east winds disqualifies the hand as pinfu for the dealer or for any player in the east round.

Agari:	The pair wait disqualifies this hand as pinfu.

Agari:	The dragon pair does not qualify this hand as pinfu.

Agari:	The middle wait does not qualify this hand as pinfu.

Agari:	This hand qualifies for pinfu using either 6-pin or 9-pin. However, the first tile, 3-pin, functions as tanki. Coupled with the 6-pin, it is on a 3-6 nobetan. Nevertheless, 6-pin still qualifies for pinfu, because the han increase takes precedence over fu.

Value

By definition, pinfu has the minimum possible fu: a pinfu ron has 30 fu, while a pinfu tsumo has 20 fu. Therefore, for hands below mangan, a hand with pinfu will result is less points than other hands with the same han value. To demonstrate:

Riichi + Pinfu ron (2 han 30 fu) = 2000 points
Riichi + Tanyao ron (2 han 40 fu) = 2600 points
Riichi + Mentsumo + Pinfu (3 han 20 fu) = 2700 points
Riichi + Mentsumo + Tanyao (3 han 30 fu) = 4000 points

Of course, pinfu still increases your score due to the +1 han (riichi + tanyao + pinfu > riichi + tanyao). Also, once the hand reaches mangan or higher, fu no longer matters, so pinfu is worth the same as any other 1-han yaku.

Compatibility

Main article: Yaku compatibility

^ Ippatsu requires riichi to be of any use.

	RCH	DRI	IPP	SMO	TAN	PFU	IPK	ITT	YAK	SDJ	SDO	TOI	SNA	SNK	CHA	JUN	RPK	SSG	HRO	HON	CHN	CHI	RIN	HAI	HOU	CHK
PFU

Pinfu is incompatible with any yaku that requires a triplet, including rinshan. It is similarly incompatible with chiitoitsu, which does not use mentsu at all. On the other hand, pinfu works any sequential based yaku. As long as the hand is closed, the pair does not produce "fu", and the wait is open, then pinfu may be applied.

Usage

Pinfu is one of the most common yaku. While complex, the requirements are not difficult to meet.

When playing with a closed hand, sequences are much easier to complete than triplets, so having "all sequences" is reasonably common.
Ryanmen waits have better tile efficiency than other waits, so players will normally gather and keep ryanmen in their hand, leading to a ryanmen wait at tenpai.
Pairs are even easier to complete than sequences.

Therefore, by aiming to complete a closed hand quickly, players will often end up scoring this yaku as a byproduct. While pinfu won't be as fast as tanyao or yakuhai, because it cannot be scored open, this yaku is still seen often.

It naturally combines with other sequence based yaku, namely iipeikou, sanshoku doujun, and ittsuu.

External links

平和_(麻雀)

Pinfu in Japanese Wikipedia

@@ Line 1: / Line 1: @@
-Pinfu is a standard yaku.  This yaku is defined by having 0-fu aside from the base 20.  Though, this yaku may receive the bonus 10-fu acquired from a closed ron.  This yaku is closed only.
+{{Infobox yaku
+|type        = Yaku
+|kanji       = 平和
+|english     = All sequences
+|value       = 1 han
+|yakuSpeed   = Very fast
+|difficulty  = Very easy
+|yakuCombine = All yaku except [[Chiitoitsu]] and [[koutsu|koutsu based]] yaku.
+|gameExample = * [http://tenhou.net/0/?log=2013010416gm-0009-7447-x8de057189079&tw=1&ts=3 Pinfu] with [[riichi]]
+* [http://tenhou.net/0/?log=2014011309gm-0009-7447-cf5a6054&tw=3&ts=7 Pinfu] with [[damaten]]
+}}
+'''Pinfu''' {{kana|平和}} is a [[yaku]] obtained when a [[closed]] hand gains no [[fu]] from its composition at [[tenpai]]. In other words, it would only gain the base 20 fu and fu from the win method. It is worth 1 han and can only be scored by closed hands.
 ==Tile diagram==
 {{#mjt:123m23478s56799p}}  Winning tile: {{#mjt:6s}} or {{#mjt:9s}}
-==English reference==
+The winning tile completes the last sequence, which is worth 0 fu, making the hand pinfu.
-In English, pinfu is commonly referred as "all sequences".  However, the yaku is not as simple as that.  Other than having an open hand, it is possible for a hand to be composed of all sequences and still not be classed as a pinfu.
+==Definition==
+{{main|Fu}}
+In English, pinfu is sometimes referred to as "all sequences", but that isn't the only requirement for this yaku. There are hands that have all sequences but cannot score pinfu.
+The definition of pinfu is a closed hand that has no [[fu]], other than the fu from winning. To score pinfu:
+*The hand must be closed.
+*The hand cannot have any triplets or quads - it must be all sequences.
+*The pair cannot be composed of [[yakuhai]] - the pair cannot be the round wind, seat wind, or a dragon.
+*At tenpai, the hand must have a [[ryanmen]] [[wait]]. A ryanmen wait is two consecutive tiles waiting to complete either side of sequence, such as {23} or {45}.
+**The pair must be complete before reaching tenpai. This means that a "two-sided" [[nobetan]] wait does not count, it has to be a wait to complete a sequence.
+**[[Complex waits]] can also score pinfu if they could be interpreted as a ryanmen wait. A [[sanmenchan]] wait, such as {34567}, always counts as a ryanmen wait, because it can be interpreted as {34 + 567} (a ryanmen wait) or {345 + 67} (also a ryanmen wait). [[Ryantan]] counts only if you win by completing the sequence (e.g. a wait of {4555} only scores pinfu if you win with 3 or 6).
+By avoiding all excess sources of fu, you can score pinfu. Triplets and quads score at least 2 fu each. A yakuhai pair scores 2 fu. A non-ryanmen wait scores 2 fu.
+As an exception, pinfu does not score fu from [[tsumo]] (win from self draw). Normally, a win by self draw is worth 2 fu. When a hand wins with pinfu, these 2 fu are waived. Thus, a pinfu tsumo is worth 20 fu. Pinfu ''is'' allowed to score the 10 fu from winning from a closed [[ron]], though.
+===Counter examples===
+The following examples are all "all sequence hands", but they are not pinfu.
+{| class="wikitable"
+|-
+|width=50%| {{machi|pattern     = 456m345p78p55s8z5'67s|tilewaits   = 69p|wait status = Agari}}
+|width=50%| Every tile group is a sequence, but this hand is [[Naki|open]].
+|-
+|style="background:#444; color:white;" colspan=2|
+|-
+|width=50%| {{machi|pattern     = 23m123p678s345m11z|tilewaits   = 14m|wait status = Agari}}
+|width=50%| The pair of east winds disqualifies the hand as pinfu for the dealer or for any player in the [[east round]].
+|-
+|style="background:#444; color:white;" colspan=2|
+|-
+|width=50%| {{machi|pattern     = 123456p789m567s3m|tilewaits   = 3m|wait status = Agari}}
+|width=50%| The [[tanki|pair wait]] disqualifies this hand as pinfu.
+|-
+|style="background:#444; color:white;" colspan=2|
+|-
+|width=50%| {{machi|pattern     = 23m123p678s345m55z|tilewaits   = 14m|wait status = Agari}}
+|width=50%| The [[sangenpai|dragon pair]] does not qualify this hand as pinfu.
+|-
+|style="background:#444; color:white;" colspan=2|
+|-
+|width=50%| {{machi|pattern     = 123m234s79s22567p|tilewaits   = 8s|wait status = Agari}}
+|width=50%| The [[kanchan|middle wait]] does not qualify this hand as pinfu.
+|-
+|style="background:#444; color:white;" colspan=2|
+|-
+|width=50%| {{machi|pattern     = 456m123s3456678p|tilewaits   = 369p|wait status = Agari}}
+|width=50%| This hand qualifies for pinfu using either 6-pin or 9-pin.  However, the first tile, 3-pin, functions as tanki.  Coupled with the 6-pin, it is on a 3-6 [[nobetan]].  Nevertheless, 6-pin still qualifies for pinfu, because the han increase takes precedence over fu.
+|}
+==Value==
+By definition, pinfu has the minimum possible fu: a pinfu ron has 30 fu, while a pinfu tsumo has 20 fu. Therefore, for hands below [[mangan]], a hand with pinfu will result is less points than other hands with the same han value. To demonstrate:
+*Riichi + Pinfu ron (2 han 30 fu) = 2000 points
+*Riichi + Tanyao ron (2 han 40 fu) = 2600 points
+*Riichi + Mentsumo + Pinfu (3 han 20 fu) = 2700 points
+*Riichi + Mentsumo + Tanyao (3 han 30 fu) = 4000 points
-==Fu==
+Of course, pinfu still increases your score due to the +1 han (riichi + tanyao + pinfu > riichi + tanyao). Also, once the hand reaches [[mangan]] or higher, fu no longer matters, so pinfu is worth the same as any other 1-han yaku.
-To understand pinfu, players must understand the nature of ''fu''.  ''Fu'' are a set of points associated with hand composition.  Pinfu lacks any of these.
+==Compatibility==
+{{main|Yaku compatibility}}
+{{Yaku compatibility table|PFU}}
+Pinfu is incompatible with any yaku that requires a [[ankou|triplet]], including [[rinshan]]. It is similarly incompatible with [[chiitoitsu]], which does not use [[mentsu]] at all.  On the other hand, pinfu works any sequential based yaku. As long as the hand is closed, the pair does not produce "[[Scoring#Fu|fu]]", and the wait is [[ryanmen|open]], then pinfu may be applied.
 ==Usage==
-<!--Strategy and tips on best implementing pinfu-->
+Pinfu is one of the most common yaku. While complex, the requirements are not difficult to meet.
+*When playing with a closed hand, sequences are much easier to complete than triplets, so having "all sequences" is reasonably common.
+*[[Ryanmen]] waits have better [[tile efficiency]] than other waits, so players will normally gather and keep ryanmen in their hand, leading to a ryanmen wait at tenpai.
+*Pairs are even easier to complete than sequences.
+Therefore, by aiming to complete a closed hand quickly, players will often end up scoring this yaku as a byproduct. While pinfu won't be as fast as [[tanyao]] or [[yakuhai]], because it cannot be scored open, this yaku is still seen often.
+It naturally combines with other sequence based yaku, namely [[iipeikou]], [[sanshoku doujun]], and [[ittsuu]].
+==External links==
+{{jpwiki|平和_(麻雀)}}
+[[Category:Yaku]]
+{{Navbox yaku}}