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'''Mentsu''' {{kana|面子}} are the tile groups used for the [[Japanese mahjong|game]]. The groups follow a similar pattern to the regular card game, gin rummy, where the focus is on groups of three tiles and sometimes four. They are subdivided into | '''Mentsu''' {{kana|面子}} are the tile groups used for the [[Japanese mahjong|game]]. The groups follow a similar pattern to the regular card game, gin rummy, where the focus is on groups of three tiles and sometimes four. 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== | ==The tile groups== | ||
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{| class="wikitable" width=40% | {| class="wikitable" width=40% | ||
|- | |- | ||
| align=center width=33%|{{#mjt: 0z99p0z}} || align=center width=33%| {{#mjt: 5555'm}} || align=center width=33%| | | align=center width=33%|{{#mjt: 0z99p0z}} || align=center width=33%| {{#mjt: 5555'm}} || align=center width=33%| {{#mjt:77"7s}} | ||
|- | |- | ||
| Ankan - Closed || Minkan - Open || Shouminkan - Open (added) | | Ankan - Closed || Minkan - Open || Shouminkan - Open (added) | ||
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Tile groups involving four-of-a-kind take on a different nature than the other tile groups. '''Kantsu''' {{kana|槓子}} must be declared by [[kan]], to be useful. Kan is a special [[Naki|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. | Tile groups involving four-of-a-kind take on a different nature than the other tile groups. '''Kantsu''' {{kana|槓子}} must be declared by [[kan]], to be useful. Kan is a special [[Naki|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 === | |||
{{main|Jantou}} | |||
This is the pair of the hand, or the '''jantou'''. Every hand requires a pair, mixed in with the other tile groups. Unlike the other tile groups, it is against the rule to call tiles to complete the pair with an incomplete hand. Of course, it can be called as a winning tile. | |||
==External links== | ==External links== | ||