Pinfu: Difference between revisions

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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|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.  
In English, pinfu is sometimes referred to as "all sequences". However, the yaku is not as simple as that. There are hands that have all sequences and are not valid for pinfu.
 
The exact 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.
*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 score pinfu if they are composed off of ryanmen waits. Therefore, a [[sanmenchan]] wait always counts as ryanmen. [[Ryantan]] counts if you win by completing the sequence (e.g. a wait of {4555} only scores pinfu if you win with 3 or 6).
 
If you know how fu is scored, the requirements for pinfu make sense. Triplets and quads score at least 2 fu each. A yakuhai pair scores 2 fu. A non-ryanmen wait scores 2 fu. Therefore, by having a closed hand that avoids all extra sources of fu, you gain pinfu. Pinfu ''is'' allowed to score the 10 fu from winning from a closed [[ron]].
 
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, and is the only hand that can be worth 20 fu. (Open hands with 0 fu gain +2 fu for being open.)


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


{| class="wikitable"
{| class="wikitable"
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==Fu==
==Value==
{{main|Fu}}
By definition, pinfu has less fu than other hands at the same han value. Specifically, a pinfu ron has 30 fu, while a pinfu tsumo  has 20 fu. Therefore, for hands below [[mangan]], pinfu results in less points than other yaku.


To understand pinfu, players must understand the nature of '''fu''', or mini-points.  Fu are a set of points associated with hand composition.  In the case of pinfu, the relevant sources of fu comes from the tile groups and the wait patterns.  The only wait pinfu gains fu involves the 10 fu gained from winning with a closed ron.
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


Therefore, pinfu must avoid these patterns:
Of course, pinfu still increases your score even with the fu decrease (riichi + tanyao + pinfu > riichi + tanyao). Also, once the hand reaches [[mangan]] or higher, fu no longer matter, so pinfu is worth the same as any other 1-han yaku.
* Any koutsu or kantsu is worth at least 2 fu. A pinfu hand must have four shuntsu.
* Winning from a [[tanki]], [[kanchan]], or [[penchan]] wait is worth 2 fu.
* A pair of [[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 hand must win from a [[ryanmen]] wait, or a complex wait that includes ryanmen (such as [[ryanmenten]] or [[ryantan]]). In other words, the winning tile must complete an open [[shuntsu]] (sequence).
 
As an exception, pinfu with [[mentsumo]] gains 0 fu from tsumo, or winning by self-draw.  Normally, a winning tile drawn from the wall is worth 2 fu. In turn, the hand qualifies as pinfu, and 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.


==Compatibility==
==Compatibility==
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{{Yaku compatibility table|PFU}}
{{Yaku compatibility table|PFU}}


Essentially, pinfu is incompatible with any yaku that employs [[ankou|triplets]], 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.
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==
==Usage==
Pinfu is one of the most common yaku. When developing a hand, players will naturally keep [[ryanmen]] shapes in their hand, due to their higher [[tile efficiency]]. In addition, sequences are easier to complete than triplets. While it isn't as fast as [[tanyao]] or [[yakuhai]], as pinfu cannot be scored open, this yaku is still seen often. It naturally combines with other sequence based yaku, namely [[iipekiou]], [[sanshoku doujun]], and [[ittsuu]].
Pinfu is one of the most common yaku. With a closed hand, sequences are much easier to complete than triplets. Plus, when developing a hand, players will naturally keep [[ryanmen]] due to their higher [[tile efficiency]]. Therefore, players looking to complete a closed hand quickly are likely to have pinfu. While it isn't as fast as [[tanyao]] or [[yakuhai]], because pinfu 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==
==External links==

Latest revision as of 16:36, 16 April 2024

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

Pinfu 「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 wait pattern of ryanmen (open wait).

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". However, the yaku is not as simple as that. There are hands that have all sequences and are not valid for pinfu.

The exact 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.
  • 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 score pinfu if they are composed off of ryanmen waits. Therefore, a sanmenchan wait always counts as ryanmen. Ryantan counts if you win by completing the sequence (e.g. a wait of {4555} only scores pinfu if you win with 3 or 6).

If you know how fu is scored, the requirements for pinfu make sense. Triplets and quads score at least 2 fu each. A yakuhai pair scores 2 fu. A non-ryanmen wait scores 2 fu. Therefore, by having a closed hand that avoids all extra sources of fu, you gain pinfu. Pinfu is allowed to score the 10 fu from winning from a closed ron.

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, and is the only hand that can be worth 20 fu. (Open hands with 0 fu gain +2 fu for being open.)

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 less fu than other hands at the same han value. Specifically, a pinfu ron has 30 fu, while a pinfu tsumo has 20 fu. Therefore, for hands below mangan, pinfu results in less points than other yaku.

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 even with the fu decrease (riichi + tanyao + pinfu > riichi + tanyao). Also, once the hand reaches mangan or higher, fu no longer matter, 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. With a closed hand, sequences are much easier to complete than triplets. Plus, when developing a hand, players will naturally keep ryanmen due to their higher tile efficiency. Therefore, players looking to complete a closed hand quickly are likely to have pinfu. While it isn't as fast as tanyao or yakuhai, because pinfu 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
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