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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. | ||
== | ==Definition== | ||
{{main|Fu}} | {{main|Fu}} | ||
In English, pinfu is sometimes referred to as "all sequences". | 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" | The following examples are all "all sequence hands", but they are not pinfu. | ||
{| class="wikitable" | {| class="wikitable" | ||
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|width=50%| {{machi|pattern = 456m345p78p55s8z5'67s|tilewaits = 69p|wait status = Agari}} | |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]]. | |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%| {{machi|pattern = 23m123p678s345m11z|tilewaits = 14m|wait status = Agari}} | ||
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|} | |} | ||
== | ==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|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== | ||
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. | |||
*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== | ==External links== |
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