Pinfu: Difference between revisions

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*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).

**[[Complex waits]] can also score pinfu if they are composed off of ryanmen waits. 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).

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]].

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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~~.

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:

~~To demonstrate:~~

*Riichi + Pinfu ron (2 han 30 fu) = 2000 points

*Riichi + Tanyao ron (2 han 40 fu) = 2600 points

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*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.

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 matter, so pinfu is worth the same as any other 1-han yaku.

==Compatibility==

@@ Line 30: / Line 30: @@
 *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).
+**[[Complex waits]] can also score pinfu if they are composed off of ryanmen waits. 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).
 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]].
@@ Line 71: / Line 71: @@
 ==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.
+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:
-To demonstrate:
 *Riichi + Pinfu ron (2 han 30 fu) = 2000 points
 *Riichi + Tanyao ron (2 han 40 fu) = 2600 points
@@ Line 79: / Line 78: @@
 *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.
+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 matter, so pinfu is worth the same as any other 1-han yaku.
 ==Compatibility==

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