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Pinfu: Difference between revisions
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*The hand cannot have any triplets or quads - it must be all sequences. | *The hand cannot have any triplets or quads - it must be all sequences. | ||
*The pair cannot be composed off [[yakuhai]] - the pair cannot be the round wind, seat wind, or a dragon. | *The pair cannot be composed off [[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 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 the "two-sided" [[nobetan]] does not count, it has to be a wait to complete a sequence. | **The pair must be complete before reaching tenpai. This means that the "two-sided" [[nobetan]] 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 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 avoiding these 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 avoiding these sources of fu, and by having a closed hand, 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, | 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, though it gains +1 han from [[menzen tsumo]]. | ||
===Counter examples=== | ===Counter examples=== | ||
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|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. | |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 less fu than other hands at the same han value. 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 | |||
Once the hand reaches [[mangan]] or higher, fu no longer matter, so pinfu is worth the same as any other 1-han yaku, | |||
(If an open hand would have qualified for pinfu if it were closed, it is bumped up to 30 fu.) | |||
==Compatibility== | ==Compatibility== | ||