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Ryanmen: Difference between revisions
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Ryanmen always waits for two tiles. | Ryanmen always waits for two tiles. | ||
==Fu== | ==Fu== | ||
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Ryanmen is the most frequently used wait in the game, due to its strength and probability. Approximately 50% of all hands, and 66% of all [[riichi]] hands, use a ryanmen wait. | Ryanmen is the most frequently used wait in the game, due to its strength and probability. Approximately 50% of all hands, and 66% of all [[riichi]] hands, use a ryanmen wait. | ||
*It is the most powerful of the basic waits. A ryanmen waits for a maximum of 8 tiles of two different types. All other basic wait patterns can wait for a maximum of 4 tiles - ryanmen is twice as big. | *It is the most powerful of the basic waits. A ryanmen waits for a maximum of 8 tiles of two different types. All other basic wait patterns can wait for a maximum of 4 tiles - ryanmen is twice as big. | ||
*Unlike [[complex waits]], ryanmen only requires two tiles to form, | *Unlike [[complex waits]], ryanmen only requires two tiles to form. Therefore, ryanmen is much more likely to form than a complex wait. | ||
*[[Pinfu]], a common [[yaku]], requires a ryanmen or ryanmen-derived wait. | *[[Pinfu]], a common [[yaku]], requires a ryanmen or ryanmen-derived wait. | ||
Whether a hand is in [[tenpai]] or not, ryanmen waits are efficient to use. | Whether a hand is in [[tenpai]] or not, ryanmen waits are [[tile efficiency|efficient]] to gather and use. | ||
===Suji=== | ===Suji=== | ||
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{{main|Suji}} | {{main|Suji}} | ||
[[Suji]] (i.e. "mahjong intervals") is a [[defensive]] concept directly related to ryanmen waits. In essence, when a tile is suji, it would be impossible for an opponent to have a ryanmen wait without being in [[furiten]]. | [[Suji]] (i.e. the "mahjong intervals") is a [[defense|defensive]] concept directly related to ryanmen waits. | ||
In essence, when a tile is suji, it would be impossible for an opponent to have a ryanmen wait without being in [[furiten]]. | |||
* A ryanmen will always wait on tiles that are three apart, forming the intervals: 1-4-7, 2-5-8, and 3-6-9. For example, a 2-3 ryanmen waits for either a 1 or 4, and is thus part of the 1-4-7 interval. | * A ryanmen will always wait on tiles that are three apart, forming the intervals: 1-4-7, 2-5-8, and 3-6-9. For example, a 2-3 ryanmen waits for either a 1 or 4, and is thus part of the 1-4-7 interval. | ||
* Therefore, if an opponent discards a 4, they cannot have a ryanmen wait on a 1 or 7 of the same suit (without being in [[furiten]], which would prevent them from winning off ''your'' discarded tile). So after an opponent discards a 4, it is safer to discard a 1 or 7. | * Therefore, if an opponent discards a 4, they cannot have a ryanmen wait on a 1 or 7 of the same suit (without being in [[furiten]], which would prevent them from winning off ''your'' discarded tile). So after an opponent discards a 4, it is safer to discard a 1 or 7. | ||
* If the opponent discards a 1, then the 4 is not necessarily safe: they could still have a 4-7 ryanmen wait. For 4 to be "full" suji, both 1 and 7 must be discarded. | * If the opponent discards a 1, then the 4 is not necessarily safe: they could still have a 4-7 ryanmen wait. For 4 to be "full" suji, both 1 and 7 must be discarded. | ||
Suji works because ryanmen is so effective and common. | |||
==Related Complex Waits== | |||
These [[complex waits]] are related to ryanmen waits. | |||
===Sanmenchan=== | |||
{{#mjt:000000z45678s00000z}} Waiting for: {{#mjt:3s}}, {{#mjt:6s}}, {{#mjt:9s}} | |||
When a ryanmen is adjacent to a complete sequence, forming 5 consecutive number tiles, it forms a [[sanmenchan]] - which waits for 3 tiles instead of 2. This is because the hand can be interpreted in one of two ways: | |||
*{{#mjt:45s}} ryanmen + {{#mjt:678s}} sequence; Waiting for: {{#mjt:3s}}, {{#mjt:6s}} | |||
*{{#mjt:456s}} sequence + {{#mjt:78s}} ryanmen; Waiting for: {{#mjt:6s}}, {{#mjt:9s}} | |||
This wait pattern never scores fu (and is thus eligible for pinfu), because it is always interpreted as a ryanmen wait. | |||
===Ryantan=== | |||
{{main|Ryantan}} | |||
{{#mjt:000z3334p000000z}} Waiting for: {{#mjt:2p}}, {{#mjt:5p}}, and {{#mjt:4p}} | |||
A [[ryantan]] is a triplet with another tile that is numerically adjacent, where none are [[terminal]] tiles. It is a combination of the ryanmen and [[tanki]] waits. Hands that lack another pair can enter tenpai with a ryantan. | |||
It can be interpreted as either "333 + 4" (triplet + tanki wait) or "33 + 34" (pair + ryanmen wait). Thus, it waits on 2p and 5p (completing the ryanmen) as well as 4p (completing the tanki). Ryantan scores fu only if it completes the tanki wait. When completing the ryanmen wait, it scores no fu, and is thus eligible for pinfu | |||
==External links== | ==External links== | ||