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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 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. | **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. | **[[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]]. | 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== | ==Value== | ||
By definition, pinfu has | 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 + Pinfu ron (2 han 30 fu) = 2000 points | ||
*Riichi + Tanyao ron (2 han 40 fu) = 2600 points | *Riichi + Tanyao ron (2 han 40 fu) = 2600 points | ||
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*Riichi + Mentsumo + Tanyao (3 han 30 fu) = 4000 points | *Riichi + Mentsumo + Tanyao (3 han 30 fu) = 4000 points | ||
Of course, pinfu still increases your score | 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== | ==Compatibility== | ||