Chinroutou

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Chinroutou
Type Yakuman
Kanji 清老頭
English All terminals
Value Yakuman
Speed Very slow
Difficulty Very hard

Chinroutou 「清老頭」 is a yakuman, where every tile is a terminal, or 1's or 9's. No other tile type are used: no simples (2-8) or honors.

Tile pattern

Agari: or

Routouhai

Routouhai 「老頭牌」 are the tiles numbered 1 or 9, among the numbered suits. In English, they are denoted as terminals, because they are at the end of the 1 to 9 number scale as the numbered suits do not loop. So a tile group of 9-1-2 do not count, when it comes to forming tile groups.

Formation

For this yakuman, there are only six types of terminals available: two from each of the numbered suit (1 and 9). Given the basic hand pattern of four melds and a pair, five out of the six types of terminals are needed to build this hand. Since there are only six tile types available for this hand, it is impossible to form a chiitoitsu variation.

External links

Chinroutou in Japanese Wikipedia