Mentsu: Difference between revisions
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'''Mentsu''' {{kana|面子}}, known as "tile groups", "melds", or "sets" in English, are used to create a winning hand. They are subdivided into four types: '''shuntsu''' (sequence), '''koutsu''' (three-of-a-kind), '''kantsu''' (four-of-a-kind), and '''jantou''' (pair). They are further categorized by their state being "open" or "closed". | |||
== | Forming these groups is a central part of [[Tile efficiency|developing a mahjong hand]], because it is required for attaining [[tenpai]] and completing hands altogether. Two main factors go towards the formation of these tile groups: suit and number (or type). | ||
==The tile groups== | |||
Mahjong features four types of tiles in terms of suits: the numbered suits and [[honor]]s. Every tile group ''must'' be of a single suit - therefore, a mix of suits would be [[chombo|invalid]]. | |||
In addition, honor tiles can only be used by themselves. An honor tile group must be made out of identical copies of one honor tile; you cannot mix different honor tiles together. In other words, honors can be used in pairs/triplets/quads, but not sequences. | |||
===Shuntsu=== | ===Shuntsu=== | ||
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'''Shuntsu''' {{kana|順子}} is a tile group consisting of three sequential numbered tiles. | '''Shuntsu''' {{kana|順子}} (sequences) is a tile group consisting of three sequential numbered tiles. Note that 9 does not "wrap around" to 1 - you cannot have sequences of "891" or "912". In addition, you cannot make sequences by using honor tiles. | ||
To form a '''minjun''', players are limited to calling tiles from [[kamicha]], or the player from the left. | Self-drawn sequences are called '''anjun''' {{kana|暗順}}. The open variety are '''minjun''' {{kana|明順}}. To form a '''minjun''', players are limited to calling tiles from [[kamicha]], or the player from the left. Discarded tiles from the other two players, that are needed to complete this meld cannot be called upon. Furthermore, an added restriction is applied by [[kuikae]], which applies to calls off of previously completed sequences. | ||
===Koutsu=== | ===Koutsu=== | ||
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'''Koutsu''' {{kana|刻子}} is a tile group | '''Koutsu''' {{kana|刻子}} is a tile group consisting of three of the same type of tiles. In English, koutsu are referred as "triplets". Players may develop '''minkou''' {{kana|明刻}} (open triplets) by calling on a discarded tile while already having a pair of said tile. | ||
===Kantsu=== | ===Kantsu=== | ||
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[[Category:Mentsu]] | [[Category:Mentsu]] | ||
Latest revision as of 10:03, 10 April 2024
Mentsu 「面子」, known as "tile groups", "melds", or "sets" in English, are used to create a winning hand. They are subdivided into four types: shuntsu (sequence), koutsu (three-of-a-kind), kantsu (four-of-a-kind), and jantou (pair). They are further categorized by their state being "open" or "closed".
Forming these groups is a central part of developing a mahjong hand, because it is required for attaining tenpai and completing hands altogether. Two main factors go towards the formation of these tile groups: suit and number (or type).
The tile groups
Mahjong features four types of tiles in terms of suits: the numbered suits and honors. Every tile group must be of a single suit - therefore, a mix of suits would be invalid.
In addition, honor tiles can only be used by themselves. An honor tile group must be made out of identical copies of one honor tile; you cannot mix different honor tiles together. In other words, honors can be used in pairs/triplets/quads, but not sequences.
Shuntsu
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| Anjun - Closed | Minjun - Open | Minjun - Open (middle number called) |
Shuntsu 「順子」 (sequences) is a tile group consisting of three sequential numbered tiles. Note that 9 does not "wrap around" to 1 - you cannot have sequences of "891" or "912". In addition, you cannot make sequences by using honor tiles.
Self-drawn sequences are called anjun 「暗順」. The open variety are minjun 「明順」. To form a minjun, players are limited to calling tiles from kamicha, or the player from the left. Discarded tiles from the other two players, that are needed to complete this meld cannot be called upon. Furthermore, an added restriction is applied by kuikae, which applies to calls off of previously completed sequences.
Koutsu
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| Ankou - Closed | Minkou - Open |
Koutsu 「刻子」 is a tile group consisting of three of the same type of tiles. In English, koutsu are referred as "triplets". Players may develop minkou 「明刻」 (open triplets) by calling on a discarded tile while already having a pair of said tile.
Kantsu
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| Ankan - Closed | Minkan - Open | Shouminkan - Open (added) |
Tile groups involving four-of-a-kind take on a different nature than the other tile groups. Kantsu 「槓子」 must be declared by kan, to be useful. Kan is a special tile call in the game. This call forms a meld from four identical tiles. After the declaration of "kan", then a special set of rules are invoked.
Jantou
This is the pair of the hand, or the jantou 「雀」. The terms mentsu and group do not refer to the pair, but only to the triplets, quads, and sequences.
External links
- Mentsu in Japanese Wikipedia