Pinfu: Difference between revisions

From Japanese Mahjong Wiki
Jump to navigation Jump to search
VisualWikitext
mNo edit summary
(re-reword the intro definition of pinfu)
 
(49 intermediate revisions by 5 users not shown)
Line 8: Line 8:
|yakuCombine = All yaku except [[Chiitoitsu]] and [[koutsu|koutsu based]] yaku.
|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]]
|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 Pinfu] with [[damaten]]
* [http://tenhou.net/0/?log=2014011309gm-0009-7447-cf5a6054&tw=3&ts=7 Pinfu] with [[damaten]]
}}
}}


'''Pinfu''' {{kana|平和}} is a standard yaku.  This yaku is defined by having 0 fu aside from the base 20 fu, or 30 fu in the case of a closed ron. It is worth 1 han and closed only.  Under all cases, a [[tenpai]] for pinfu requires the [[machi|wait pattern]] of [[ryanmen]] (open wait).
'''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==
==Tile diagram==
Line 19: Line 19:
The winning tile completes the last sequence, which is worth 0 fu, making the hand pinfu.
The winning tile completes the last sequence, which is worth 0 fu, making the hand pinfu.


==English reference==
==Definition==
{{main|Scoring#Fu}}
{{main|Fu}}


In English, pinfu is sometimes referred to 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.  The following examples are a "all sequence hands"; but they are not pinfu.
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.


#{{#mjt:23m123p678s345m11z}}  Agari: {{#mjt:1m}} or {{#mjt:4m}}
The definition of pinfu is a closed hand that has no [[fu]], other than the fu from winning. To score pinfu:
#{{#mjt:123456p789m567s3m}}  Agari: {{#mjt:3m}}
*The hand must be closed.
#{{#mjt:23m123p678s345m44z}}  Agari: {{#mjt:1m}} or {{#mjt:4m}}
*The hand cannot have any triplets or quads - it must be all sequences.
#{{#mjt:123m 234s 789s 5678p}} Agari: {{#mjt:5p}} or {{#mjt:8p}}
*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).


The first and third examples can be pinfu. In the case of the first example, the hand must be formed during the south round, while not seated as east. For the third example, the hand is pinfu for all players not seated north. As for the second and fourth examples, under no circumstances can they be pinfu.
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.


==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.
To understand pinfu, players must understand the nature of ''fu''. ''Fu'' are a set of points associated with hand composition.  Pinfu lacks any fu except the 10 [[Menzen-kafu|menzen-kafu]] for winning with a closed ron.


* Any koutsu or kantsu is worth at least 2 fu. A pinfu hand must have four shuntsu.
===Counter examples===
* Winning from a [[Tanki|tanki]], [[Kanchan|kanchan]], or [[Penchan|penchan]] wait is worth 2 fu. A pinfu hand must win from a [[Ryanmen|ryanmen]] wait, i.e., the final tile must complete a shuntsu that was completable on any side.
The following examples are all "all sequence hands", but they are not pinfu.
* A pair of [[Yakuhai|yakuhai]], i.e., dragons, the round wind, or the seat wind, is worth 2 fu. A pinfu hand must have a valueless pair.
* An open hand worth 20 fu is counted as 30 fu. Pinfu may only be awarded to a closed hand.


In the end, a pinfu tenpai hand must have a wait of either a [[ryanmen]] or [[ryanmenten]].
{| 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
 
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|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.


A winning tile drawn from the wall is normally worth 2 fu. If the closed hand otherwise qualifies as pinfu, these 2 fu are waived. The hand is then scored at 20 fu and at least 2 han for [[Menzen tsumo|menzen tsumo]] and pinfu. Some rule variations may not allow waiving these fu and score such a hand as 30 fu, tsumo, without pinfu. Such variations are rare.
==Usage==
Pinfu is one of the most common yaku. While complex, the requirements are not difficult to meet.


==Compatability==
*When playing with a closed hand, sequences are much easier to complete than triplets, so having "all sequences" is reasonably common.
{{main|Yaku compatability}}
*[[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.


{{yakuheader}}
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.
| PFU || {{yes}} || {{yes}} || {{yes}} || {{yes}} || {{yes}} ||bgcolor="000000"|  || {{yes}} || {{yes}} || {{no}} || {{yes}} || {{no}} || {{no}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{no}} || {{no}} || {{yes}} || {{yes}} || {{yes}} 
|}


Essentially, pinfu is incompatible with any yaku that employs [[ankou|triplets]].  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.
It naturally combines with other sequence based yaku, namely [[iipeikou]], [[sanshoku doujun]], and [[ittsuu]].


==External links==
==External links==
{{jpwiki|平和}}
{{jpwiki|平和_(麻雀)}}


[[Category:Yaku]]
[[Category:Yaku]]


{{Navbox yaku}}
{{Navbox yaku}}

Latest revision as of 08:23, 14 September 2024

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

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

Pinfu in Japanese Wikipedia
Closed only Yaku - 1 han
Yaku - 1 han
Yaku - 2 han
Yaku - 3 han
Yaku - 6 han
Yakuman
Special
Optional
Topics
Retrieved from "https://riichi.wiki/index.php?title=Pinfu&oldid=25893"